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Maryland Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Maryland is much lower than the national average. The risk of tornado damage in Maryland is lower than the national average.

Topics:Earthquake IndexVolcano IndexTornado IndexOther Weather Extremes EventsVolcanos NearbyHistorical Earthquake EventsHistorical Tornado Events

Earthquake Index, #32

Maryland
0.17
U.S.
1.81

The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.

Volcano Index, #14

Maryland
0.0000
U.S.
0.0023

The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.

Tornado Index, #23

Maryland
121.90
U.S.
136.45

The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.

Other Weather Extremes Events

A total of 7,020 other weather extremes events from 1950 to 2010 were recorded in Maryland. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:17Cold:58Dense Fog:80Drought:90
Dust Storm:0Flood:763Hail:928Heat:105Heavy Snow:188
High Surf:0Hurricane:3Ice Storm:35Landslide:0Strong Wind:306
Thunderstorm Winds:3,143Tropical Storm:12Wildfire:10Winter Storm:167Winter Weather:248
Other:867 

Volcanos Nearby

No volcano is found in or near Maryland.

Historical Earthquake Events

No historical earthquake events that had recorded magnitudes of 3.5 or above found in Maryland.

No historical earthquake events found in or near Maryland.

Historical Tornado Events

A total of 39 historical tornado events that had recorded magnitude of 2 or above found in Maryland.

DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
1998-06-02439°40'N / 78°58'W39°38'N / 78°50'W8.00 Miles250 Yards055.0M250KAllegany
 Brief Description: The combination of an upper-level disturbance, increasing atmospheric shear, and ample instability set the stage for a major severe weather episode across the north half of Maryland during the late afternoon and evening. The episode was highlighted by supercell thunderstorms which produced three tornadoes, numerous instances of large hail, and several downbursts. The most substantial event was a strong-to-violent tornado which caused excessive damage in western Allegany Co. The multi-vortex twister had estimated wind speeds of 210 mph - the highest in recorded Maryland history - when it ravaged a neighborhood of well-constructed single-family homes along a local plateau just north of Frostburg. The tornado was on the ground for an amazing 33 miles, beginning in Somerset Co, Pennsylvania before crossing northeastern Garrett Co Maryland on its way to Allegany Co. The parent supercell tracked over 200 miles. After descending Big Savage Mountain, the twister produced a swath of destruction across a neighborhood just west of Frostburg. At least eight homes were destroyed and dozens others were damaged. Several cars were damaged, and some were totalled. One two-story home was obliterated. Left in the wake was the foundation and some remnant plywood. The residents of the home - a woman and two children - received ample warning and rode out the storm to safety in the basement. Advance warning likely saved several lives and reduced casualties; in all, only 5 area residents sustained minor injuries. The tornado continued through Eckhart Mines and Clarysville, causing further damage and destruction to homes and other property. It then continued through undeveloped areas, then passed across Dans Mountain before damaging a few more residences along state route 53 just north of Cresaptown. The twister lifted at that point, but the parent thunderstorm continued producing damage into eastern West Virginia. In all, emergency management officials reported 29 homes destroyed and 125 damaged, with nearly half of the surviving homes receiving moderate to major levels of damage. Initial dollar estimates ranged from $4.5 to $5 million. Hundreds, perhaps thousands, of trees in forested and developed areas were snapped or uprooted. The supercell was so powerful that Frostburg area residents' papers, including personal checks and one high school diploma - were found over 50 miles downstream in the northern Shenandoah Valley region of Virginia. The "Frostburg Tornado" was not the only twister to affect the county. The area had been on high alert since early evening - tornado warnings had been issued two other times, and funnel clouds were observed by several witnesses prior to sunset. One of the funnels touched down not too far from where the Frostburg Tornado entered the county - along the west side of Big Savage Mountain nearly 2 hours earlier. The funnel lifted while over Frostburg and nearby communities, and continued through Cumberland before touching down again on Irons Mountain 2-3 miles southeast of the city. In each instance, damage was limited to forested areas along the ridges. Tornadoes were just a portion of the severe weather to affect northern Maryland. The other major player was hail, with dozens of occurrences associated with each mini-supercell. The strongest cells produced hailstones ranging from 1.75" to 2.50" in diameter; the strong updrafts in each storm combined with steep atmospheric lapse rates to produce not only large hail but long-duration hail as well. Some areas experienced up to 20 minutes of hail, and many residents noted hail which covered the ground. Reported damage included some stripped siding, varying sized dings and dents, as well as shattered glass, in numerous vehicles; stripped paint from homes and vehicles, small limb and leaf debris, and likely crop damage or destruction. The main hail-producing storm affected portions of northern Montgomery, Howard, southern Carroll, southern Baltimore, and northern Prince George's and Anne Arundel Cos - all between 1800 and 1945EST. The episode concluded in Maryland with a few wind damage reports on the western shore of the Chesapeake Bay just before midnight. Winds blew out the door to the Annapolis (Anne Arundel Co) city fire department station, and knocked several large trees down in Eastport at approximately the same time.
2002-04-28438°33'N / 77°11'W38°31'N / 76°41'W24.00 Miles650 Yards1122114.0M0Charles
 Brief Description: A destructive tornado crossed the county from just north of Rison, through La Plata, to Benedict before moving into Calvert County. M51PH A massive tornadic storm tore through Central Charles and Calvert Counties between 7 and 8 PM EDT on the 28th. The tornadoes it produced left a 64 mile path of destruction ranging from F1 to F4 damage. Five people were killed, 122 were injured, and over $115 million in damage was reported. The tornadoes were spawned from a supercell thunderstorm that crossed the Potomac River from Prince William County. Up to 10 miles north of the path of the tornado, large hail up to 4.5 inches in diameter fell. Debris from the tornado was found as far away as southern Delaware. Wind damage was also reported near the path of the storm. Across Charles County, 638 homes were damaged, 100 homes were destroyed, 143 businesses (mainly in downtown La Plata) were damaged, and 49 businesses were destroyed. Countless trees and agricultural buildings were downed along the rural path of the storm. Three people were killed and at least 120 people were injured countywide, 12 critically. A 51-year-old man was killed and his wife was critically injured when their house under construction on Hawkins Gate Road, about 5 miles east of La Plata, collapsed. A 54-year-old man died in his car from an apparent heart attack at the intersection of Route 301 and Route 6 in downtown La Plata. The third victim, a 72-year-old woman, died of a heart attack in Waldorf after being frightened by the tornado. The tornado first touched down on the eastern edge of General Smallwood State Park just north of Rison. It pushed east-southeast and passed just south of Pisgah where it grew to F2 strength. The tornado moved through Mount Pisgah and damaged homes on Ripley Road between Ripley and Garden Estates. The twister continued to move east through rural lands south of Hawthorne Road (Route 255) passing just north of the community of Graystone. Next, it moved through the communities of Habre de Venture, Longmeade, Clamber Hill, Hawthorne Manor, and Hillendale about 3 miles west of downtown La Plata. The tornado, now F3 strength, hit the western portion of La Plata next, moving directly through the neighborhoods of Valley View, Morgan's Ridge, Quailwood, and Haldane. The tornado, now F4 strength, continued east into the downtown area where it crossed through the intersection of Route 301 and 6. Damage was found on either side of Route 6 with the most severe devastation occurring on the south side of the highway. The downtown business district was nearly wiped out after 65% of the buildings were either heavily damaged or destroyed. The 125-foot city water tower was also downed. The tornado continued its trek southeast of the downtown hospital into the northern portion of Clarks Run, across Route 6, and into the community of Ellenwood. The F4 tornado moved east of La Plata into the southern portion of Brynwood Farm Estates, then east across the Zekiah Swamp. Several homes at the end of Hawkins Gate Road were completely destroyed, and this was the location of one fatality and numerous injuries. Next, the tornado crossed Olivers Shop Road just north of the intersection of Route 231. It continued east through rural lands until it intersected Route 5 at Homeland Drive just south of Hughesville. East of Homeland Drive, it severely damaged the Girl Scout facility off Scout Camp Road. The tornado tracked east-southeast toward Benedict, remaining just south of Route 231 and weakening to F2 strength. It struck Colonial Lane and a home south of Benedict before crossing the river into Calvert County just south of the bridge. In Calvert County, the tornado first struck the community of Patuxent View just south of Route 231 at F2 strength. Over half of the homes in this development were damaged. One home with no foundation or anchoring just east of Patuxent View off Hallowing Point Road was picked up and thrown 80 feet into a culvert. A 68-year-old man and his 65-year-old wife who were taking shelter in the house were killed. The twister continued eastward along Sixes Road to the intersection of Adelina Road. Several homes and barns were damaged. From there it pushed east through the communities of Boyds Farm, Mutual Estates, and Chippingwood, where it damaged more property. It crossed Route 2/4 and 765 just north of St. Leonard, downing trees and it went. Finally, it crossed the Western Shores Estates development at F1 strength before it moved offshore. Another tornado formed on the Long Beach shoreline just north of Calvert Cliffs Power Plant. It downed trees before moving offshore. This tornado grew in strength as it crossed the bay and struck Dorchester County on the eastern shore just south of Taylor's Island. Across the county, 125 homes were damaged and 10 were destroyed, mainly in the Brownsville and Hallowing Point areas. County officials collected over 300 tons of downed trees and storm debris.
1961-06-09339°12'N / 76°37'W39°13'N / 76°36'W00250K0Anne Arundel
1967-05-19339°23'N / 79°20'W0.30 Mile33 Yards1025K0Garrett
1980-06-03339°23'N / 79°29'W39°21'N / 79°23'W5.60 Miles117 Yards04250K0Garrett
1983-05-22339°42'N / 77°15'W39°42'N / 77°14'W1.00 Mile37 Yards0025K0Frederick
1983-05-22339°42'N / 77°14'W39°43'N / 77°12'W1.00 Mile37 Yards0025K0Carroll
1996-07-19339°30'N / 76°59'W39°29'N / 76°57'W2.20 Miles350 Yards035.0M20KCarroll
 Brief Description: One of the most potent tornadoes in recorded history in the state of Maryland tracked for 2 and 1/4 miles through the Mystic Kane and Four Seasons subdivisions just off state route 32 northwest of Gamber. The tornado was a strong F3 (180 mph estimated winds) with multiple vortices. Homes and trees struck by individual vortices sustained the worst damage. There were several eyewitness accounts of the tornado/funnel cloud shortly before touchdown. In all, 66 structures sustained damage. Twelve single-family homes were destroyed, five which lost most of the second story and garages. Three persons were injured. Two children were injured when the tornado blew them out of the second level of one of the homes. Their father suffered cuts and bruises when a wall partially collapsed on him while he was trying the rescue the children. Another dozen homes were deemed temporarily uninhabitable with substantial roof and siding damage. An additional 37 homes, a couple of apartments, and another barn received some damage. Many material items were sucked out of the homes, from bicycles to jewelry. Several automobiles were damaged by fallen and/or flying debris. Debris littered the ground for miles. A barn along route 32 was completely destroyed, and pieces of it were found as far away as 3.5 miles to the southeast of the barn's original location. Dozens of trees were snapped, shredded, debarked, and uprooted. Corn stalks were sucked up leaving six inch stubs as the tornado crossed a field west of route 32. A corn stalk was embedded into the wall of a house 1/2 mile away from the stalk's original location. Numerous airborne missiles (large and small) were generated, puncturing holes into homes and becoming embedded into the ground. A refrigerator was found wrapped around a mailbox. A van was dragged 50 feet, then flipped over two times. Other vehicles were also damaged.
2001-09-24338°56'N / 76°59'W39°06'N / 76°51'W11.50 Miles200 Yards255100.0M0Prince George's
 Brief Description: A large multi-vortex tornado touched down near Hyattsville, tracked along the Route 1 cooridor from College Park to Laurel, then crossed into Howard County. The tornado killed 2 students at the University of Maryland, injured 54 others countywide, and caused 100 million dollars in damage. F20VE, F23VE Severe thunderstorms moved through Central Maryland during the early evening of the 24th. One thunderstorm produced a devastating F3 tornado which was on the ground for 17.5 miles from College Park in Prince George's County to just east of Columbia in Howard County. Multiple vortices were reported with the tornado at times. The tornado first touched down in Northwest Branch Stream Valley Park just west of Hyattsville. It rapidly strengthened to an F3 tornado with winds up to 200 MPH. The damage path ranged in width from 100 to 200 yards. The tornado crossed the intersection of Adelphi Road and University Boulevard into the western campus of the University of Maryland. Ten trailers being used as a temporary office for the Maryland Fire and Rescue Institute were completely destroyed by the twister. Debris from the trailers such as video tapes and pieces of paper were found up to 60 miles away in Northern Baltimore and Harford Counties in addition to extreme southeast Pennsylvania. Four of the six people inside the trailers were injured, one seriously. One staff member was thrown free of the destruction and was found in a dumpster nearby. Another person dug their hands into the carpet and held on as their feet were being pulled up in the air by the tornado. The other four occupants, including one child, took shelter under desks and survived. Two University of Maryland students who were visiting their father who worked in the trailers left by car shortly before the tornado hit. The two sisters, ages 20 and 23, were killed when the tornado picked up their car outside of Denton Hall and threw it either around or over an eight-story dorm. They died instantly when their car crashed into a wooded area 300 yards from the road. Most of the other buildings on the campus in the path of the storm were made of brick and suffered only minor to moderate damage, such as Denton Hall Dormitory, Easton Hall Dormitory and Dining Hall, and the President's Mansion. A parking lot outside of Denton Hall full of cars was also hit by the tornado. At least 200 vehicles in the parking lot were damaged, including at least 100 that were blown into and onto other vehicles. At least twenty cars were totaled and one car was partially ripped apart. The woods behind the parking lot were nearly flattened. The bubble roof of the football practice facility near Byrd Stadium was removed. Forty-eight people on campus, including 25 students, were injured by flying debris as the twister downed trees and ripped pieces of siding and roofing off buildings. In addition, residential areas near the campus, including the University Courtyard Apartments sustained damage. A total of 3000 students were left temporarily homeless after two dorms and an off-campus housing unit were evacuated due to storm damage. During the recovery effort, a 78-year-old firefighter who responded to the tragedy at the University died of a heart attack shortly after returning from the scene. The tornado moved north-northeast off the campus and crossed University Boulevard at the intersection of Metzerott Road. The steeple of a church was removed and cars were flipped near the intersection. Power lines and trees were also downed. The twister continued through Paint Branch Stream Valley Park where it downed numerous trees. The tornado weakened to F2 strength before it crossed Interstate 95/495 just west of the Route 1 interchange. It was remarkable that even though the highway was filled with bumper to bumper rush hour traffic, the only damage reported was a flipped tractor trailer. The next area hit by the tornado was the community of Cherry Hill. Several trees and power lines were downed onto roads and houses just west of Baltimore Avenue, including the Chestnut Hills subdivision. Several businesses along Route 1 sustained minor damage, and three additional buildings lost portions of their roofs. Three employees of a business in the Chestnut Hills Shopping Center were injured by flying glass after the windows on the front of the store were shattered. The tornado moved across the National Agricultural Research Center and caused over $40 million dollars in damage. Thirty greenhouses were damaged and several long term studies inside were destroyed. Fifteen other buildings west of Route 1 suffered minor to moderate damage. Numerous trees, including a row of historic willow oaks, were downed. Over 65 vehicles in the employee parking lot were damaged by flying debris. Eleven of these vehicles were totaled. Just north of the research center, "stunning" tree and power line damage was reported at the intersection of Sellman and Montgomery Roads. The tornado tracked across Powder Mill Road and ripped the roof off an office building at the intersection of Cedar Lane. It continued across the Beltsville Heights development and caused damage to the roof at Martin Luther King Elementary School. The tornado continued moving north-northeast toward Laurel. The continuation of the damage path was located at the Virginia Manor Industrial Park on Van Dusen Road where several trees were downed. The tornado was spotted as it moved past Laurel Hospital and it caused minor damage in the Village at Wellington subdivision nearby. The next concentrated area of damage was found at Laurel High School. An annex with 6 classrooms was heavily damaged. The roof was ripped off three of the classrooms and three people inside the structure were injured by flying debris. Significant damage was also reported to the athletic fields behind the school. The tornado moved northeast across the Fairlawn development where it damaged several homes. One home on 10th Street was destroyed after the twister removed the roof and an outside wall. On Montrose Avenue, a woman and her dog were briefly picked up by the tornado. The woman sustained injuries to her hip and leg after being tossed 3 feet in the air and the dog landed uninjured. The historic Harrison Building at the corner of 9th and Montgomery Streets lost its roof and a church and school nearby were damaged. The tornado remained on the ground as it crossed the Patuxent River into Howard County. Across Prince George's County, the tornado was responsible for $100 million in damage. A total of 861 homes, 561 vehicles, and 23 businesses were damaged countywide. In North Laurel, the twister heavily damaged a townhouse complex on Riverbrink Court in the Settlers Landing development. A total of 43 townhomes were damaged, four of which were uninhabitable. The tornado weakened to an F1 before it downed trees onto All Saints Road. The tornado weakened to an F0 as it exited North Laurel and moved across Savage Park. Isolated reports of downed trees were received in the community, including on Red Jacket Way, Vollmerhausen Road, and at the intersection of Interstate 95 and Route 32. In its final stages, the tornado crossed the General Electric Appliance Park and downed its final tree at the intersection of Snowden River Parkway and Route 175 southeast of Columbia. In addition to the devastating tornado, the storms also produced very heavy rainfall and gusty winds. In Anne Arundel County, strong winds from the tornadic thunderstorm downed 13 trees between Laurel and Maryland City. In northern Carroll County, a bow echo produced damaging winds which downed trees along Bankard Road northwest of Union Mills. Rainfall totals included 3.93 inches in Millers, 3.30 inches in Manchester, and 3.26 inches in Westminster. In Montgomery County, 2 to 4 inches of rainfall across the western portion of the county caused low lying areas to quickly fill with water. Several roads were flooded including River Road and Falls Road. A motorist had to be rescued after their car stalled in high water in Poolsville. A total of 3.61 inches of rainfall was recorded in Damascus. In Howard County, between 2 and 3.75 inches of rain fell. A total of 2.86 inches was recorded in Columbia and 3.46 inches fell just southeast of the city. In Frederick County, several roads were flooded by heavy downpours including Ball Road off Route 355 and New Design Road south of Adamstown Road. Heavy rain downed trees at the intersection of Greenfield and Page Roads, Lingamore road and Gashouse Pike, Lawson Road and Route 75, and Bittle Road and Route 17. Street flooding was also reported in Point of Rocks on Route 28. Rainfall totals included 2.54 inches in Wolfsville and 2.30 inches in Frederick.
2002-04-28338°25'N / 76°18'W38°21'N / 75°49'W18.00 Miles150 Yards00150K0Dorchester
 Brief Description: Tornado path length 16-18 miles. One house and several outbuildings destroyed near Hip Roof Road. Most of the damage along tornado path rated F0 to F1.
1959-07-19239°31'N / 76°07'W0.80 Mile50 Yards0025K0Harford
1969-07-05239°40'N / 78°54'W0.50 Mile200 Yards01250K0Allegany
1971-07-30239°04'N / 76°03'W39°08'N / 75°55'W8.30 Miles300 Yards0025K0Queen Anne's
1971-09-12238°53'N / 76°53'W38°54'N / 76°49'W3.00 Miles200 Yards00250K0Prince George's
1973-06-16239°20'N / 76°35'W0425K0Baltimore
1976-03-21239°13'N / 75°56'W0.20 Mile100 Yards00250K0Queen Anne's
1977-06-20239°24'N / 79°29'W39°22'N / 79°27'W1.90 Miles50 Yards0025K0Garrett
1978-06-20238°41'N / 77°06'W1.00 Mile50 Yards0025K0Charles
1978-06-27238°42'N / 76°40'W38°37'N / 76°35'W6.90 Miles50 Yards00250K0Calvert
1978-07-31239°24'N / 77°21'W1.50 Miles100 Yards0025K0Frederick
1978-07-31239°18'N / 77°04'W0.80 Mile40 Yards00250K0Howard
1978-08-28239°43'N / 76°59'W39°34'N / 76°47'W14.80 Miles33 Yards000K0Frederick
1979-05-23239°35'N / 77°00'W2.00 Miles150 Yards002.5M0Carroll
1979-09-05239°27'N / 76°25'W0.50 Mile20 Yards00250K0Baltimore
1980-06-29239°31'N / 76°10'W2.00 Miles150 Yards010250K0Harford
1981-05-15239°36'N / 75°50'W1.50 Miles27 Yards022.5M0Cecil
1983-10-13238°22'N / 76°34'W38°25'N / 76°33'W3.00 Miles37 Yards0025K0St. Mary's
1983-10-13238°25'N / 76°33'W38°26'N / 76°32'W1.00 Mile37 Yards0025K0Calvert
1990-10-18239°28'N / 76°49'W0.10 Mile100 Yards05925.0M0Baltimore
1995-10-05238°49'N / 76°57'W2.50 Miles200 Yards035.0M0Prince George's
 Brief Description: The strongest tornado, containing estimated winds of 150 mph, caused substantial damage, and several injuries, at a Temple Hills neighborhood. Three persons sustained minor injuries requiring a short hospital stay; 17 others reported cuts and abrasions. In all, 100 homes suffered damage. Fifteen of the homes were damaged severely enough to be condemned; four homes lost their entire roofs. Numerous trees, several wide-girthed hardwoods, were uprooted, and 9,000 Potomac Electric Power customers were without power.
1996-07-19239°23'N / 77°42'W39°21'N / 77°42'W2.00 Miles125 Yards00400K75KWashington
 Brief Description: A moderate tornado (F2) tracked between two mountain ridges in extreme southern Washington Co, knocking down hundreds of trees, including several onto homes which caused substantial damage. At least one barn was completely destroyed in Yarrowsburg. The storm attained maximum strength just south of town (where the trees, including numerous hardwoods, were flattened). The tornado weakened considerably before dissipating along the eastern ridge. Structural and vehicle damage, though not as prevalent as the tree damage, included the following: Portions of roofs from two barns were blown off; minor residential damage, including shattered windows, unhinged shingles, and torn off trim/gutters. Some gravestones were overturned by the winds, and several power lines were knocked down. Several vehicles and vehicle windows were damaged.
1998-06-02239°44'N / 78°58'W39°42'N / 78°56'W2.50 Miles700 Yards00500K0Garrett
 Brief Description: An F2 tornado passed through the town of Finzel in extreme northeast Garrett County. Several buildings were destroyed, including a small house and cinder-block garage. This tornado actually began in extreme eastern Fayette County, PA and was on the ground for 33 miles before ending in in Allegany County, MD.
1998-06-02239°40'N / 79°30'W39°38'N / 79°27'W3.00 Miles300 Yards001.0M0Garrett
 Brief Description: An F2 tornado passed southeast through southern Fayette County PA, the northeast tip of Preston County WV, and into northwest Garrett County MD. The total length of the tornado as it passed across these three counties was 12 miles. Damage included a completely destroyed dairy barn, two completely destroyed house trailers, and at least 21 other structures heavily damaged, many with roofs partially or completely peeled off. Several cows were killed, with one cow thrown through the air over 100 yards. A clearly visible 300-yard wide, 1-mile long swath of trees which were completely sheared/uprooted was present near the Pennsylvania/West Virginia state border. One Fayette County official estimated at least two million dollars damage in lost timber alone in that county. Despite the damage, interviews with law enforcement officials, paramedics and local residents revealed no injuries occurred.
2001-09-24239°08'N / 76°53'W39°14'N / 76°50'W6.00 Miles100 Yards001.0M0Howard
 Brief Description: A tornado crossed into Howard County from Laurel and remained on the ground until it dissipated about 1 mile east of Columbia. Several townhomes in North Laurel were damaged and trees were downed along the remainder of its path. Severe thunderstorms moved through Central Maryland during the early evening of the 24th. One thunderstorm produced a devastating F3 tornado which was on the ground for 17.5 miles from College Park in Prince George's County to just east of Columbia in Howard County. Multiple vortices were reported with the tornado at times. The tornado first touched down in Northwest Branch Stream Valley Park just west of Hyattsville. It rapidly strengthened to an F3 tornado with winds up to 200 MPH. The damage path ranged in width from 100 to 200 yards. The tornado crossed the intersection of Adelphi Road and University Boulevard into the western campus of the University of Maryland. Ten trailers being used as a temporary office for the Maryland Fire and Rescue Institute were completely destroyed by the twister. Debris from the trailers such as video tapes and pieces of paper were found up to 60 miles away in Northern Baltimore and Harford Counties in addition to extreme southeast Pennsylvania. Four of the six people inside the trailers were injured, one seriously. One staff member was thrown free of the destruction and was found in a dumpster nearby. Another person dug their hands into the carpet and held on as their feet were being pulled up in the air by the tornado. The other four occupants, including one child, took shelter under desks and survived. Two University of Maryland students who were visiting their father who worked in the trailers left by car shortly before the tornado hit. The two sisters, ages 20 and 23, were killed when the tornado picked up their car outside of Denton Hall and threw it either around or over an eight-story dorm. They died instantly when their car crashed into a wooded area 300 yards from the road. Most of the other buildings on the campus in the path of the storm were made of brick and suffered only minor to moderate damage, such as Denton Hall Dormitory, Easton Hall Dormitory and Dining Hall, and the President's Mansion. A parking lot outside of Denton Hall full of cars was also hit by the tornado. At least 200 vehicles in the parking lot were damaged, including at least 100 that were blown into and onto other vehicles. At least twenty cars were totaled and one car was partially ripped apart. The woods behind the parking lot were nearly flattened. The bubble roof of the football practice facility near Byrd Stadium was removed. Forty-eight people on campus, including 25 students, were injured by flying debris as the twister downed trees and ripped pieces of siding and roofing off buildings. In addition, residential areas near the campus, including the University Courtyard Apartments sustained damage. A total of 3000 students were left temporarily homeless after two dorms and an off-campus housing unit were evacuated due to storm damage. During the recovery effort, a 78-year-old firefighter who responded to the tragedy at the University died of a heart attack shortly after returning from the scene. The tornado moved north-northeast off the campus and crossed University Boulevard at the intersection of Metzerott Road. The steeple of a church was removed and cars were flipped near the intersection. Power lines and trees were also downed. The twister continued through Paint Branch Stream Valley Park where it downed numerous trees. The tornado weakened to F2 strength before it crossed Interstate 95/495 just west of the Route 1 interchange. It was remarkable that even though the highway was filled with bumper to bumper rush hour traffic, the only damage reported was a flipped tractor trailer. The next area hit by the tornado was the community of Cherry Hill. Several trees and power lines were downed onto roads and houses just west of Baltimore Avenue, including the Chestnut Hills subdivision. Several businesses along Route 1 sustained minor damage, and three additional buildings lost portions of their roofs. Three employees of a business in the Chestnut Hills Shopping Center were injured by flying glass after the windows on the front of the store were shattered. The tornado moved across the National Agricultural Research Center and caused over $40 million dollars in damage. Thirty greenhouses were damaged and several long term studies inside were destroyed. Fifteen other buildings west of Route 1 suffered minor to moderate damage. Numerous trees, including a row of historic willow oaks, were downed. Over 65 vehicles in the employee parking lot were damaged by flying debris. Eleven of these vehicles were totaled. Just north of the research center, "stunning" tree and power line damage was reported at the intersection of Sellman and Montgomery Roads. The tornado tracked across Powder Mill Road and ripped the roof off an office building at the intersection of Cedar Lane. It continued across the Beltsville Heights development and caused damage to the roof at Martin Luther King Elementary School. The tornado continued moving north-northeast toward Laurel. The continuation of the damage path was located at the Virginia Manor Industrial Park on Van Dusen Road where several trees were downed. The tornado was spotted as it moved past Laurel Hospital and it caused minor damage in the Village at Wellington subdivision nearby. The next concentrated area of damage was found at Laurel High School. An annex with 6 classrooms was heavily damaged. The roof was ripped off three of the classrooms and three people inside the structure were injured by flying debris. Significant damage was also reported to the athletic fields behind the school. The tornado moved northeast across the Fairlawn development where it damaged several homes. One home on 10th Street was destroyed after the twister removed the roof and an outside wall. On Montrose Avenue, a woman and her dog were briefly picked up by the tornado. The woman sustained injuries to her hip and leg after being tossed 3 feet in the air and the dog landed uninjured. The historic Harrison Building at the corner of 9th and Montgomery Streets lost its roof and a church and school nearby were damaged. The tornado remained on the ground as it crossed the Patuxent River into Howard County. Across Prince George's County, the tornado was responsible for $100 million in damage. A total of 861 homes, 561 vehicles, and 23 businesses were damaged countywide. In North Laurel, the twister heavily damaged a townhouse complex on Riverbrink Court in the Settlers Landing development. A total of 43 townhomes were damaged, four of which were uninhabitable. The tornado weakened to an F1 before it downed trees onto All Saints Road. The tornado weakened to an F0 as it exited North Laurel and moved across Savage Park. Isolated reports of downed trees were received in the community, including on Red Jacket Way, Vollmerhausen Road, and at the intersection of Interstate 95 and Route 32. In its final stages, the tornado crossed the General Electric Appliance Park and downed its final tree at the intersection of Snowden River Parkway and Route 175 southeast of Columbia. In addition to the devastating tornado, the storms also produced very heavy rainfall and gusty winds. In Anne Arundel County, strong winds from the tornadic thunderstorm downed 13 trees between Laurel and Maryland City. In northern Carroll County, a bow echo produced damaging winds which downed trees along Bankard Road northwest of Union Mills. Rainfall totals included 3.93 inches in Millers, 3.30 inches in Manchester, and 3.26 inches in Westminster. In Montgomery County, 2 to 4 inches of rainfall across the western portion of the county caused low lying areas to quickly fill with water. Several roads were flooded including River Road and Falls Road. A motorist had to be rescued after their car stalled in high water in Poolsville. A total of 3.61 inches of rainfall was recorded in Damascus. In Howard County, between 2 and 3.75 inches of rain fell. A total of 2.86 inches was recorded in Columbia and 3.46 inches fell just southeast of the city. In Frederick County, several roads were flooded by heavy downpours including Ball Road off Route 355 and New Design Road south of Adamstown Road. Heavy rain downed trees at the intersection of Greenfield and Page Roads, Lingamore road and Gashouse Pike, Lawson Road and Route 75, and Bittle Road and Route 17. Street flooding was also reported in Point of Rocks on Route 28. Rainfall totals included 2.54 inches in Wolfsville and 2.30 inches in Frederick.
2002-04-28238°32'N / 76°59'W38°32'N / 76°59'W3.00 Miles100 Yards001.0M0Charles
 Brief Description: A second tornado briefly touched down just north of downtown La Plata. A massive tornadic storm tore through Central Charles and Calvert Counties between 7 and 8 PM EDT on the 28th. The tornadoes it produced left a 64 mile path of destruction ranging from F1 to F4 damage. Five people were killed, 122 were injured, and over $115 million in damage was reported. The tornadoes were spawned from a supercell thunderstorm that crossed the Potomac River from Prince William County. Up to 10 miles north of the path of the tornado, large hail up to 4.5 inches in diameter fell. Debris from the tornado was found as far away as southern Delaware. Wind damage was also reported near the path of the storm. Across Charles County, 638 homes were damaged, 100 homes were destroyed, 143 businesses (mainly in downtown La Plata) were damaged, and 49 businesses were destroyed. Countless trees and agricultural buildings were downed along the rural path of the storm. Three people were killed and at least 120 people were injured countywide, 12 critically. A 51-year-old man was killed and his wife was critically injured when their house under construction on Hawkins Gate Road, about 5 miles east of La Plata, collapsed. A 54-year-old man died in his car from an apparent heart attack at the intersection of Route 301 and Route 6 in downtown La Plata. The third victim, a 72-year-old woman, died of a heart attack in Waldorf after being frightened by the tornado. The tornado first touched down on the eastern edge of General Smallwood State Park just north of Rison. It pushed east-southeast and passed just south of Pisgah where it grew to F2 strength. The tornado moved through Mount Pisgah and damaged homes on Ripley Road between Ripley and Garden Estates. The twister continued to move east through rural lands south of Hawthorne Road (Route 255) passing just north of the community of Graystone. Next, it moved through the communities of Habre de Venture, Longmeade, Clamber Hill, Hawthorne Manor, and Hillendale about 3 miles west of downtown La Plata. The tornado, now F3 strength, hit the western portion of La Plata next, moving directly through the neighborhoods of Valley View, Morgan's Ridge, Quailwood, and Haldane. The tornado, now F4 strength, continued east into the downtown area where it crossed through the intersection of Route 301 and 6. Damage was found on either side of Route 6 with the most severe devastation occurring on the south side of the highway. The downtown business district was nearly wiped out after 65% of the buildings were either heavily damaged or destroyed. The 125-foot city water tower was also downed. The tornado continued its trek southeast of the downtown hospital into the northern portion of Clarks Run, across Route 6, and into the community of Ellenwood. The F4 tornado moved east of La Plata into the southern portion of Brynwood Farm Estates, then east across the Zekiah Swamp. Several homes at the end of Hawkins Gate Road were completely destroyed, and this was the location of one fatality and numerous injuries. Next, the tornado crossed Olivers Shop Road just north of the intersection of Route 231. It continued east through rural lands until it intersected Route 5 at Homeland Drive just south of Hughesville. East of Homeland Drive, it severely damaged the Girl Scout facility off Scout Camp Road. The tornado tracked east-southeast toward Benedict, remaining just south of Route 231 and weakening to F2 strength. It struck Colonial Lane and a home south of Benedict before crossing the river into Calvert County just south of the bridge. In Calvert County, the tornado first struck the community of Patuxent View just south of Route 231 at F2 strength. Over half of the homes in this development were damaged. One home with no foundation or anchoring just east of Patuxent View off Hallowing Point Road was picked up and thrown 80 feet into a culvert. A 68-year-old man and his 65-year-old wife who were taking shelter in the house were killed. The twister continued eastward along Sixes Road to the intersection of Adelina Road. Several homes and barns were damaged. From there it pushed east through the communities of Boyds Farm, Mutual Estates, and Chippingwood, where it damaged more property. It crossed Route 2/4 and 765 just north of St. Leonard, downing trees and it went. Finally, it crossed the Western Shores Estates development at F1 strength before it moved offshore. Another tornado formed on the Long Beach shoreline just north of Calvert Cliffs Power Plant. It downed trees before moving offshore. This tornado grew in strength as it crossed the bay and struck Dorchester County on the eastern shore just south of Taylor's Island. Across the county, 125 homes were damaged and 10 were destroyed, mainly in the Brownsville and Hallowing Point areas. County officials collected over 300 tons of downed trees and storm debris.
2002-04-28238°30'N / 76°39'W38°29'N / 76°30'W14.00 Miles200 Yards2010.0M0Calvert
 Brief Description: A strong tornado crossed the Patuxent River from Charles County and moved east through central Calvert County. It tracked between Patuxent View and Western Shore Estates before moving onto the Chesapeake Bay. M68PH, F65PH A massive tornadic storm tore through Central Charles and Calvert Counties between 7 and 8 PM EDT on the 28th. The tornadoes it produced left a 64 mile path of destruction ranging from F1 to F4 damage. Five people were killed, 122 were injured, and over $115 million in damage was reported. The tornadoes were spawned from a supercell thunderstorm that crossed the Potomac River from Prince William County. Up to 10 miles north of the path of the tornado, large hail up to 4.5 inches in diameter fell. Debris from the tornado was found as far away as southern Delaware. Wind damage was also reported near the path of the storm. Across Charles County, 638 homes were damaged, 100 homes were destroyed, 143 businesses (mainly in downtown La Plata) were damaged, and 49 businesses were destroyed. Countless trees and agricultural buildings were downed along the rural path of the storm. Three people were killed and at least 120 people were injured countywide, 12 critically. A 51-year-old man was killed and his wife was critically injured when their house under construction on Hawkins Gate Road, about 5 miles east of La Plata, collapsed. A 54-year-old man died in his car from an apparent heart attack at the intersection of Route 301 and Route 6 in downtown La Plata. The third victim, a 72-year-old woman, died of a heart attack in Waldorf after being frightened by the tornado. The tornado first touched down on the eastern edge of General Smallwood State Park just north of Rison. It pushed east-southeast and passed just south of Pisgah where it grew to F2 strength. The tornado moved through Mount Pisgah and damaged homes on Ripley Road between Ripley and Garden Estates. The twister continued to move east through rural lands south of Hawthorne Road (Route 255) passing just north of the community of Graystone. Next, it moved through the communities of Habre de Venture, Longmeade, Clamber Hill, Hawthorne Manor, and Hillendale about 3 miles west of downtown La Plata. The tornado, now F3 strength, hit the western portion of La Plata next, moving directly through the neighborhoods of Valley View, Morgan's Ridge, Quailwood, and Haldane. The tornado, now F4 strength, continued east into the downtown area where it crossed through the intersection of Route 301 and 6. Damage was found on either side of Route 6 with the most severe devastation occurring on the south side of the highway. The downtown business district was nearly wiped out after 65% of the buildings were either heavily damaged or destroyed. The 125-foot city water tower was also downed. The tornado continued its trek southeast of the downtown hospital into the northern portion of Clarks Run, across Route 6, and into the community of Ellenwood. The F4 tornado moved east of La Plata into the southern portion of Brynwood Farm Estates, then east across the Zekiah Swamp. Several homes at the end of Hawkins Gate Road were completely destroyed, and this was the location of one fatality and numerous injuries. Next, the tornado crossed Olivers Shop Road just north of the intersection of Route 231. It continued east through rural lands until it intersected Route 5 at Homeland Drive just south of Hughesville. East of Homeland Drive, it severely damaged the Girl Scout facility off Scout Camp Road. The tornado tracked east-southeast toward Benedict, remaining just south of Route 231 and weakening to F2 strength. It struck Colonial Lane and a home south of Benedict before crossing the river into Calvert County just south of the bridge. In Calvert County, the tornado first struck the community of Patuxent View just south of Route 231 at F2 strength. Over half of the homes in this development were damaged. One home with no foundation or anchoring just east of Patuxent View off Hallowing Point Road was picked up and thrown 80 feet into a culvert. A 68-year-old man and his 65-year-old wife who were taking shelter in the house were killed. The twister continued eastward along Sixes Road to the intersection of Adelina Road. Several homes and barns were damaged. From there it pushed east through the communities of Boyds Farm, Mutual Estates, and Chippingwood, where it damaged more property. It crossed Route 2/4 and 765 just north of St. Leonard, downing trees and it went. Finally, it crossed the Western Shores Estates development at F1 strength before it moved offshore. Another tornado formed on the Long Beach shoreline just north of Calvert Cliffs Power Plant. It downed trees before moving offshore. This tornado grew in strength as it crossed the bay and struck Dorchester County on the eastern shore just south of Taylor's Island. Across the county, 125 homes were damaged and 10 were destroyed, mainly in the Brownsville and Hallowing Point areas. County officials collected over 300 tons of downed trees and storm debris.
2002-05-02239°39'N / 76°00'W39°42'N / 75°57'W4.50 Miles160 Yards00330K0Cecil
 Brief Description: The first F2 (on the Fujita Scale) tornado in 21 years struck Cecil County during the late afternoon of the 2nd. About 21 homes, silos, sheds and barns sustained moderate to extensive damage. One family was displaced as their house was condemned because of the wind damage. Many large trees and utility poles were splintered, uprooted or snapped. Marble size hail was also reported. No serious injuries were reported. Damage was estimated at $330,000. The path length was 4.5 miles. The maximum path width was 160 yards. The tornado initially touched down just to the west of England Creamery Road about 5 miles southeast of Rising Sun at 538 p.m. EDT. The tornado's intensity was F0 to F1 as it moved across England Creamery and Trinity Church Roads. One house on Trinity Church Road had its windows broken, its porch splintered and its roof damaged. A second house on the road had its porch torn away and shingles ripped from the roof. The homeowner's barn and its content was destroyed. Their lawn chairs and hedge trimmers were found half a mile away. One of the two points that the tornado reached its maximum intensity of F2 occurred when it moved through the Tailwind Estates on Steeplechase Lane. Three homes were heavily damaged. One house (the condemned one) had half its roof torn away and its chimney crash through its deck. The homeowner's SUV vehicle was displaced 25 feet and a shed on the block was tossed over 100 yards. The tornado's intensity again peaked at F2 as it moved through a wooded area north of Old Elm Road and west of Blue Ball Road. Extensive tree damage occurred. The second floor of a new home under construction in the area also collapsed. During the last half mile of its existence, the tornado weakened and did not remain on the ground the entire time. It dissipated around the intersection of Fairview Road and Maryland State Route 273 at 545 p.m. EDT.
2004-09-17239°24'N / 77°33'W39°24'N / 77°39'W3.00 Miles200 Yards005K0Frederick
 Brief Description: An F2 tornado touched down in far northwest Frederick County, on the northwest edge of Catoctin Mountain Park. A thickly forested stand of hardwood trees was snapped off above the bases.
2004-09-18239°42'N / 76°22'W39°44'N / 76°22'W2.00 Miles125 Yards00350K0Harford
 Brief Description: A tornado touched down near a residence off Grier Nursery Road. The storm destroyed two mobile homes, the side of a barn was blown out, structural damage to two homes were noted, and numerous large healthy trees were twisted off near the bases.


* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.


 
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