Local Data Search

 
USA.com / Pennsylvania / Armstrong County / Natural Disasters and Weather Extremes

Armstrong County Natural Disasters and Weather Extremes

 
Hot Pennsylvania Rankings
Fastest / Slowest Growing Counties in PA
Richest / Poorest Counties by Income in PA
Expensive / Cheapest Homes by County in PA
Most / Least Educated Counties in PA
Fastest / Slowest Growing Cities in PA
High / Low PA Cities by Males Employed
High / Low PA Cities by Females Employed
Best / Worst Cities by Crime Rate in PA
Richest / Poorest Cities by Income in PA
Expensive / Cheapest Homes by City in PA
Most / Least Educated Cities in PA

The chance of earthquake damage in Armstrong County is about the same as Pennsylvania average and is much lower than the national average. The risk of tornado damage in Armstrong County is about the same as Pennsylvania average and is lower than the national average.

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

Earthquake Index, #58

Armstrong County
0.01
Pennsylvania
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, #1

Armstrong County
0.0000
Pennsylvania
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, #24

Armstrong County
113.50
Pennsylvania
109.77
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 13,308 other weather extremes events within 50 miles of Armstrong County were recorded from 1950 to 2010. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:7Cold:52Dense Fog:0Drought:26
Dust Storm:0Flood:2,195Hail:2,375Heat:21Heavy Snow:374
High Surf:0Hurricane:0Ice Storm:63Landslide:0Strong Wind:254
Thunderstorm Winds:7,486Tropical Storm:1Wildfire:3Winter Storm:108Winter Weather:18
Other:325 

Volcanos Nearby

No volcano is found in or near Armstrong County.

Historical Earthquake Events

No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Armstrong County.

No historical earthquake events found in or near Armstrong County.

Historical Tornado Events

A total of 49 historical tornado events that had recorded magnitude of 2 or above found in or near Armstrong County.

Distance (miles)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
8.51966-04-23240°42'N / 79°24'W1.00 Mile17 Yards0025K0Armstrong
10.81986-09-23240°58'N / 79°26'W0.50 Mile40 Yards012.5M0Armstrong
14.31951-06-27240°35'N / 79°15'W40°52'N / 79°11'W19.70 Miles33 Yards003K0Armstrong
15.11981-04-28240°44'N / 79°44'W0.50 Mile33 Yards0025K0Butler
15.61980-06-03440°36'N / 79°33'W40°35'N / 79°30'W2.30 Miles33 Yards0120250.0M0Armstrong
16.41980-06-03440°37'N / 79°42'W40°36'N / 79°33'W7.60 Miles33 Yards00250.0M0Westmoreland
17.91954-06-01240°55'N / 79°48'W40°57'N / 79°44'W3.00 Miles150 Yards0025K0Butler
18.11980-06-03440°39'N / 79°44'W40°37'N / 79°42'W1.90 Miles33 Yards020250.0M0Allegheny
19.41980-06-03240°32'N / 79°28'W40°32'N / 79°22'W4.90 Miles33 Yards00250K0Indiana
20.81981-07-26240°34'N / 79°14'W00250K0Indiana
20.91996-07-19241°05'N / 79°19'W41°04'N / 79°13'W7.50 Miles100 Yards0025K5KClarion
 Brief Description: A tornado began in Clarion County about 6 miles north of New Bethlehem. It tracked southeast into Jefferson County through Langville. The tornado lifted 1.5 miles west of Oliveburg. The tornado uprooted trees and rolled a mobile home, about a mile north of Truittsburg in Clarion County. The tornado also damaged some homes and farms, crops and downed extensive swaths of trees along its path. The tornado moved mainly in a straight line and averaged about 100 yards in width.
20.92002-04-28240°34'N / 79°14'W40°37'N / 79°09'W5.00 Miles250 Yards01750K0Indiana
 Brief Description: A storm spawning two separate tornadoes passed over southern Armstrong County, continuing eastward into Indiana County. The first tornado, an F0, touched down at approximately 2:45 PM EST just south of the town of Spring Church in Armstrong County. It traveled east about 3 miles before crossing into Indiana County approximately 1 mile east of Maysville at 2:52 PM EST. This tornado continued traveling to the east for another mile, finally dissipating near the community of Iselin at around 2:55 PM EST. The maximum estimated winds with this tornado were about 70 MPH. Damage from this first tornado included numerous trees which were toppled or snapped. A small steeple was toppled, and a swimming pool was destroyed. There were several trees toppled onto houses, and some houses suffered minor wind damage. A garage was damaged, and a house under construction was lifted off the foundation. The same storm produced another stronger tornado, an F2, which touched down in Indiana County approximately 6 miles southwest of the city of Indiana at 3:00 PM EST. This F2 traveled to the east across Center Township for approximately 5 miles, dissipating just south of Indiana at 3:06 PM EST. The estimated maximum winds were around 135 MPH. This F2 tornado produced a swath of damage as it traveled eastward across Indiana County. One house was totally destroyed, and debris from this house was blown downwind. In this same area, a car was turned over and trees were stripped of leaves. An adjacent house exhibited damage from hail or flying projectiles on several sides. The house immediately to the north of the destroyed house lost part of its east-facing roof. There were at least an additional 18 houses damaged (roofs, shingles, siding, etc.). Several garages and barns were either toppled or snapped. A large sign from a hotel was blown down onto a car sales lot. Two cars were crushed and 18 other vehicles were damaged. One moderate injury was reported with this tornado.
22.01985-05-31441°31'N / 79°56'W40°44'N / 78°50'W12.50 Miles350 Yards84025.0M0Venango
22.31996-07-19241°04'N / 79°13'W40°59'N / 79°04'W2.50 Miles100 Yards0025K5KJefferson
 Brief Description: A tornado began in Clarion County about 6 miles north of New Bethlehem. It tracked southeast into Jefferson County through Langville. The tornado lifted 1.5 miles west of Oliveburg. The tornado uprooted trees and rolled a mobile home, about a mile north of Truittsburg in Clarion County. The tornado also damaged some homes and farms, crops and downed extensive swaths of trees along its path. The tornado moved mainly in a straight line and averaged about 100 yards in width.
24.01985-05-31440°44'N / 78°50'W41°26'N / 79°31'W11.00 Miles350 Yards0525.0M0Venango
25.31985-05-31340°47'N / 80°09'W40°43'N / 79°44'W22.00 Miles243 Yards68025.0M0Butler
26.21983-05-22240°27'N / 79°17'W40°30'N / 79°11'W6.00 Miles200 Yards002.5M0Indiana
28.11981-07-20240°51'N / 80°00'W00250K0Butler
28.81980-05-12240°24'N / 79°23'W2.20 Miles20 Yards00250K0Westmoreland
29.31983-05-22240°20'N / 79°30'W40°27'N / 79°17'W13.00 Miles200 Yards042.5M0Westmoreland
29.81954-06-01241°14'N / 79°33'W41°15'N / 79°30'W003K0Clarion
30.91985-05-31241°13'N / 79°48'W41°12'N / 79°41'W6.00 Miles150 Yards010K0Venango
31.41976-07-11241°19'N / 79°12'W40°58'N / 78°54'W28.70 Miles33 Yards17250K0Jefferson
32.11996-07-19240°55'N / 78°55'W40°52'N / 78°48'W6.50 Miles200 Yards03200K10KIndiana
 Brief Description: A tornado touched down in Jefferson County and traveled southeast into northeast Indiana County, the tornado continued into the State Game Lands and exited Indiana County 4 miles north-north east of Glen Campbell and then entered Clearfield County. The tornado's path was 200 feet wide at its greatest width in Indiana County. Just some tree damage occurred in Jefferson County. The tornado strengthened and caused greater damage in Indiana County. Just east of Rossiter, the tornado tore the roof off of a barn. A child, playing outside, sought shelter in the barn. The roof lifted off and three of the four walls collapsed. The child was not injured. A horse that was inside the barn was sucked out and carried approximately 75 feet in the air into a field. The tornado traveled then traveled up a hill and significantly damaged one mobile home and destroyed a second. The second mobile home was carried at least 75 yards across a road and smashed against a row of trees. Three people were inside the mobile home and were injured, one critically. The tornado at this time was at it's strongest, at the upper end of F2. A nearby wood frame house was destroyed and dense areas of trees were felled or snapped. About a dozen homes sustained damage along the path, 5 were damaged extensively. Thirty pound cinder blocks from a garage were thrown approximately 300 yards up a nearby hill where a stronger suction vortex was noted. The tornado tracked into the State Game Lands and a 50 yard path of downed and twisted 100 to 150 foot trees was noted into the densely forested region.
32.51953-05-30240°24'N / 79°12'W40°24'N / 79°08'W1.90 Miles33 Yards0025K0Indiana
33.71997-08-15240°20'N / 79°19'W40°21'N / 79°16'W3.50 Miles200 Yards02800K10KWestmoreland
 Brief Description: A severe thunderstorm produced a tornado that produced substantial damage in a residential area east-northeast of Latrobe along the foothills of the Chestnut Ridge. The tornado first touched down 1 mile west of Derry. The tornado completely destroyed a large tier of metal stadium bleachers at a high school football field and wrapped them against a utility pole. A nearby roof of a business was damaged and a mobile home was completely destroyed and a few mobile homes sustained damage. The tornado then tracked through a rural area, damaging some farm buildings and downing field corn. The tornado continued its rapid (estimated forward speed 50-60 miles per hour) northeast track and caused significant damage in a mobile home park in Derry. The tornado crossed Route 217 and downed trees across railroad tracks and then entered a residential area in Millwood. One frame house in Millwood was severely damaged and part of a room addition collapsed and trapped a resident, who was treated at the scene. A resident of a mobile home sustained minor injuries as well. Numerous trees were uprooted and large branches and power lines were downed along the track of the storm. One home along Route 217 had a branch embedded into the house siding. The tornado was estimated to have wind speeds of between 90 and 120 miles per hour, briefly attaining an F-2 rating on the Fujita Tornado Scale. All tolled, 7-8 mobile homes were destroyed (3 totally decimated), 10-12 sustained major damage, 15-18 sustained minor damage. One frame house was heavily damaged and about 10 sustained minor damage. One car was destroyed when a tree fell on it. Parked next to the auto was another car with two occupants that were not injured. About 10 other cars were damaged. An open-air church in Millwood was also heavily damaged. The tornado appeared to have dissipated as it entered the heavily wooded slopes of the Chestnut Ridge.
35.01976-07-11340°21'N / 79°30'W40°16'N / 79°18'W11.80 Miles67 Yards1172.5M0Westmoreland
35.51983-05-22240°18'N / 79°47'W40°20'N / 79°30'W14.00 Miles200 Yards062.5M0Westmoreland
35.71964-06-15240°18'N / 79°33'W2.00 Miles800 Yards04250K0Westmoreland
36.61975-06-04240°35'N / 80°13'W40°11'N / 79°32'W45.30 Miles30 Yards000K0Beaver
37.31956-05-13240°22'N / 79°52'W0.70 Mile200 Yards05250K0Allegheny
37.31954-06-10240°51'N / 80°11'W40°53'N / 80°10'W0225K0Lawrence
39.31954-06-10240°45'N / 80°15'W40°51'N / 80°11'W7.30 Miles33 Yards0125K0Beaver
40.51954-06-26240°15'N / 79°41'W0425K0Westmoreland
40.71963-08-03340°19'N / 79°53'W27025.0M0Allegheny
40.81983-05-22240°17'N / 79°53'W40°18'N / 79°47'W5.00 Miles200 Yards002.5M0Allegheny
41.31986-10-03241°08'N / 80°14'W41°08'N / 80°02'W9.00 Miles123 Yards002.5M0Mercer
42.91985-05-31441°26'N / 79°31'W41°26'N / 79°28'W3.00 Miles350 Yards0025.0M0Forest
44.11985-05-31340°49'N / 80°28'W40°47'N / 80°09'W17.00 Miles243 Yards34025.0M0Beaver
44.71996-07-19240°33'N / 78°45'W40°30'N / 78°39'W6.00 Miles100 Yards0000Cambria
 Brief Description: An F2 tornado touched down around 11:10 a.m. EST 2 miles east of Colver and tracked 6 miles southeast before ending 1 mile west of Loretto. The path width was 100 yards. Two homes and a barn were destroyed by this storm. Several roofs and a second barn were also damaged. A central suction vortex was visible in crop damage.
45.01956-05-12240°37'N / 80°17'W00250K0Beaver
45.31981-08-07241°24'N / 79°51'W00250K0Venango
46.61954-06-01241°18'N / 80°05'W033K0Mercer
47.61980-06-09240°39'N / 78°39'W40°35'N / 78°32'W7.40 Miles33 Yards002.5M0Cambria
47.91985-05-31441°31'N / 79°32'W41°27'N / 78°56'W25.00 Miles800 Yards7300K0Forest
48.01977-09-24241°00'N / 80°21'W002.5M0Lawrence
49.11965-11-16240°06'N / 79°36'W40°07'N / 79°35'W03250K0Fayette
49.41992-08-08241°04'N / 80°21'W2.00 Miles150 Yards0025K0Lawrence
49.51964-06-15241°14'N / 80°14'W04250K0Mercer


* 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.


 
The USA.com website and domain are privately owned and are not operated by or affiliated with any government or municipal authority.
© 2024 World Media Group, LLC.