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Delaware County Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Delaware County is lower than Oklahoma average and is much lower than the national average. The risk of tornado damage in Delaware County is lower than Oklahoma average and is much higher than the national average.

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

Earthquake Index, #73

Delaware County
0.01
Oklahoma
0.31
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

Delaware County
0.0000
Oklahoma
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, #38

Delaware County
304.10
Oklahoma
363.83
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 21,329 other weather extremes events within 50 miles of Delaware County were recorded from 1950 to 2010. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:5Cold:30Dense Fog:26Drought:54
Dust Storm:0Flood:2,387Hail:9,525Heat:75Heavy Snow:82
High Surf:0Hurricane:0Ice Storm:67Landslide:0Strong Wind:126
Thunderstorm Winds:8,355Tropical Storm:2Wildfire:25Winter Storm:157Winter Weather:80
Other:333 

Volcanos Nearby

No volcano is found in or near Delaware County.

Historical Earthquake Events

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

No historical earthquake events found in or near Delaware County.

Historical Tornado Events

A total of 119 historical tornado events that had recorded magnitude of 2 or above found in or near Delaware County.

Distance (miles)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
1.71980-04-07236°25'N / 94°48'W1.00 Mile200 Yards00250K0Delaware
3.91974-06-08336°22'N / 94°54'W36°23'N / 94°51'W2.70 Miles150 Yards00250K0Delaware
10.51959-05-09236°32'N / 94°44'W0.80 Mile880 Yards0025K0Delaware
10.91959-05-09336°29'N / 95°00'W36°36'N / 94°45'W15.90 Miles880 Yards00250K0Delaware
11.22006-03-12336°10'N / 94°55'W36°18'N / 94°38'W17.00 Miles440 Yards083.0M0Delaware
 Brief Description: The first tornado, which touched down in northwestern Cherokee County, continued into southern Delaware County. Damage suggested the tornado widened and strengthened as it moved through southern Delaware County reaching a maximum width of around 1/4 of a mile. The tornado damaged 95 homes, destroying 42 of those homes. Five businesses were also damaged. Numerous trees were snapped or uprooted and about 100 power poles were downed, which resulted in more than 5000 people losing power as a result of the storm. The worst damage from this tornado was found from near Twin Oaks to about 4 miles west-southwest of Colcord. The tornado injured eight people.
12.41981-05-23236°16'N / 94°39'W000K0Delaware
14.61959-05-09336°26'N / 95°07'W36°29'N / 95°00'W7.30 Miles880 Yards03250K0Mayes
15.01989-05-08236°15'N / 94°39'W36°11'N / 94°39'W5.00 Miles50 Yards01250K0Delaware
15.71971-05-22236°36'N / 94°47'W36°38'N / 94°44'W3.80 Miles100 Yards00250K0Delaware
16.21980-04-07336°30'N / 95°05'W36°34'N / 95°00'W6.40 Miles33 Yards042.5M0Craig
16.31984-04-27236°37'N / 94°46'W36°38'N / 94°44'W2.00 Miles20 Yards002.5M0Delaware
16.41970-10-08336°13'N / 94°32'W36°18'N / 94°36'W6.90 Miles200 Yards04250K0Benton
16.91960-05-05236°30'N / 95°06'W36°34'N / 95°01'W6.40 Miles33 Yards00250K0Mayes
17.11980-04-07336°34'N / 95°00'W36°40'N / 94°53'W9.30 Miles33 Yards002.5M0Delaware
17.61954-03-24236°27'N / 95°09'W36°30'N / 95°04'W5.60 Miles50 Yards0025K0Mayes
18.01974-06-08236°36'N / 95°00'W36°38'N / 94°57'W3.80 Miles100 Yards002.5M0Craig
19.31951-09-09236°37'N / 95°01'W2.00 Miles67 Yards003K0Craig
19.41980-04-07336°27'N / 95°12'W36°30'N / 95°05'W7.20 Miles440 Yards002.5M0Mayes
19.71980-04-07336°40'N / 94°53'W36°41'N / 94°51'W1.90 Miles33 Yards002.5M0Ottawa
20.71973-05-01236°11'N / 94°33'W36°13'N / 94°30'W3.80 Miles150 Yards04250K0Benton
20.81972-12-29236°30'N / 95°01'W36°53'N / 94°43'W31.20 Miles30 Yards00250K0Mayes
21.91970-11-19236°10'N / 94°32'W2.50 Miles100 Yards0025K0Benton
22.01971-05-05236°16'N / 95°20'W36°19'N / 95°02'W17.00 Miles200 Yards0025K0Mayes
22.41967-01-25236°32'N / 95°10'W36°36'N / 95°08'W4.70 Miles33 Yards000K0Mayes
22.72006-03-12336°16'N / 94°34'W36°20'N / 94°16'W19.00 Miles700 Yards0125.0M0Benton
 Brief Description: The second tornado moved into western Benton County (from Delaware County, Oklahoma) south of Highway 12, where damage suggested the tornado strengthened considerably. A mobile home was destroyed, a pickup truck was rolled and destroyed, and several homes sustained major damage to their roofs near Bloomfield, where damage was rated at F2. Damage was more extensive in and around Gentry and Centerton where 75 homes were damaged or destroyed. Damage in this area was rated F3. Twelve people were injured by the tornado. See Storm Data for Oklahoma, Eastern for details regarding the Delaware County segment of this tornado.
23.11968-06-01236°06'N / 94°36'W36°08'N / 94°33'W3.60 Miles200 Yards0025K0Adair
23.11973-09-24336°42'N / 94°59'W36°43'N / 94°55'W3.60 Miles100 Yards014250K0Ottawa
23.61961-05-21236°44'N / 94°51'W003K0Ottawa
23.61968-06-01236°08'N / 94°33'W36°11'N / 94°27'W6.50 Miles500 Yards003K0Benton
23.71967-01-25236°42'N / 95°00'W2.00 Miles33 Yards0625K0Ottawa
23.81967-01-25236°36'N / 95°08'W36°39'N / 95°07'W3.30 Miles33 Yards0225K0Craig
24.11973-09-24336°40'N / 95°07'W36°42'N / 94°59'W7.70 Miles100 Yards00250K0Craig
24.81960-05-05236°39'N / 95°07'W36°44'N / 95°00'W8.60 Miles500 Yards02250K0Craig
24.81961-07-22236°45'N / 94°45'W0025K0Ottawa
25.41993-04-24236°12'N / 95°15'W36°14'N / 95°10'W4.50 Miles150 Yards015.0M0Mayes
25.51960-04-16236°36'N / 95°12'W36°38'N / 95°09'W3.80 Miles200 Yards0225K0Craig
25.81982-04-02236°20'N / 95°16'W0.50 Mile10 Yards0025K0Mayes
26.51961-05-08236°15'N / 95°15'W003K0Mayes
26.91986-04-07236°29'N / 95°20'W36°27'N / 95°14'W5.00 Miles100 Yards00250K0Mayes
27.31973-09-24336°43'N / 94°55'W36°51'N / 94°52'W9.50 Miles100 Yards00250K0Ottawa
27.41987-11-15236°40'N / 95°10'W1.50 Miles50 Yards0125K0Craig
28.21959-05-09236°41'N / 94°27'W0.50 Mile50 Yards00250K0Mcdonald
28.61970-06-11236°37'N / 95°09'W36°50'N / 95°05'W15.40 Miles150 Yards11250K0Craig
28.61967-01-25236°30'N / 95°26'W36°32'N / 95°10'W14.90 Miles33 Yards0025K0Mayes
29.31990-05-15236°26'N / 95°25'W36°26'N / 95°15'W8.00 Miles123 Yards00250K0Mayes
29.72010-12-31336°01'N / 94°32'W36°06'N / 94°25'W9.00 Miles500 Yards471.5M0KWashington
 Brief Description: EVENT NARRATIVE: This segment is the second of six segments of this long-track tornado. The tornado moved into Washington County snapping numerous trees as it approached the town of Cincinnati. In Cincinnati, the tornado destroyed several permanent homes, destroyed the volunteer fire station, destroyed a mobile home, damaged several other permanent homes, snapped or uprooted numerous trees, snapped numerous power poles, and destroyed barns and outbuildings. Two people were killed in the mobile home that was destroyed and a third person was killed either in or near a barn while he was tending to his cattle. At least seven injuries also occurred. The tornado was about 300 yards wide when it went through town. The maximum estimated wind speed in the tornado based on this damage was 140 mph. The tornado continued to move rapidly northeastward and widened to about 500 yards northeast of Cincinnati. Several permanent homes were severely damaged, several mobile homes were destroyed, at least four chicken houses were destroyed, outbuildings were destroyed, numerous trees were snapped or uprooted, and power poles were snapped. A woman in one of the mobile homes that was destroyed was transported to a hospital with serious injuries. She later died from those injuries on January 4th. The tornado continued into Benton County, Arkansas. EPISODE NARRATIVE: Unseasonably warm and moist air spread into northwestern Arkansas ahead of a cold front. Scattered thunderstorms developed in the late evening and early morning hours ahead of the cold front as a weak upper level disturbance passed through the region. Large hail and damaging wind gusts occurred with some of those storms. Another round of storms developed on the cold front over eastern Oklahoma as it pushed into the area. Weak to moderate instability combined with very strong low level wind shear created an environment that supported supercell thunderstorm structures. Several supercells developed resulting in large hail and damaging wind gusts in the hours just before and after sunrise on the 31st. One of these supercells produced a long-track, strong tornado that killed four people in and near the town of Cincinnati in Washington County. Debris was transported by the tornado into northern Benton County and was reported in Bella Vista and Pea Ridge. The Northwest Arkansas Regional Airport (XNA) was closed for three hours to remove the debris from the flight line. Another supercell produced a short-lived, weak tornado in Carroll County that moved into Missouri.
29.91954-03-24236°34'N / 94°31'W36°43'N / 94°13'W19.50 Miles50 Yards0125K0Mcdonald
30.01983-11-22335°53'N / 94°48'W36°03'N / 94°37'W16.00 Miles100 Yards062.5M0Le Flore
30.12010-12-31236°06'N / 94°25'W36°07'N / 94°23'W2.00 Miles400 Yards02200K0KBenton
 Brief Description: EVENT NARRATIVE: This segment is the third of six segments of this long-track tornado. The tornado severely damaged a couple permanent homes, destroyed a mobile home, destroyed barns, snapped or uprooted numerous trees, and snapped power poles in this portion of Benton County. Two injuries occurred in the mobile home that was destroyed on Winwood Ranch Road. The maximum estimated wind speed based on this damage was 130 mph. The tornado continued into Washington County, Arkansas. EPISODE NARRATIVE: Unseasonably warm and moist air spread into northwestern Arkansas ahead of a cold front. Scattered thunderstorms developed in the late evening and early morning hours ahead of the cold front as a weak upper level disturbance passed through the region. Large hail and damaging wind gusts occurred with some of those storms. Another round of storms developed on the cold front over eastern Oklahoma as it pushed into the area. Weak to moderate instability combined with very strong low level wind shear created an environment that supported supercell thunderstorm structures. Several supercells developed resulting in large hail and damaging wind gusts in the hours just before and after sunrise on the 31st. One of these supercells produced a long-track, strong tornado that killed four people in and near the town of Cincinnati in Washington County. Debris was transported by the tornado into northern Benton County and was reported in Bella Vista and Pea Ridge. The Northwest Arkansas Regional Airport (XNA) was closed for three hours to remove the debris from the flight line. Another supercell produced a short-lived, weak tornado in Carroll County that moved into Missouri.
30.22010-12-31236°00'N / 94°34'W36°01'N / 94°32'W2.00 Miles250 Yards0060K0KAdair
 Brief Description: EVENT NARRATIVE: This segment is the first of six segments of this long-track tornado. A tornado developed just northeast of Westville and moved rapidly northeastward damaging a home, tossing or rolling four vehicles, snapping at least 13 large power poles, and snapping or uprooting large trees. Estimated maximum wind based on this damage was 125 mph. This tornado continued into Washington County, Arkansas. EPISODE NARRATIVE: Unseasonably warm and moist air spread into eastern Oklahoma ahead of a cold front. Scattered thunderstorms developed in the late evening and early morning hours ahead of the cold front as a weak upper level disturbance passed through the region. Large hail and damaging wind gusts occurred with some of these storms. Another round of storms developed on the cold front as it moved into eastern Oklahoma a few hours before sunrise. Weak to moderate instability combined with very strong low level wind shear created an environment that supported supercell thunderstorm structures. Several supercells developed resulting in large hail and damaging wind gusts in the hours just before and after sunrise on the 31st. One of these supercells produced a long-track, strong tornado that began in Adair County, Oklahoma, and moved into Washington County, Arkansas, where it killed four people in and near the town of Cincinnati.
30.82010-12-31236°07'N / 94°23'W36°08'N / 94°21'W2.00 Miles300 Yards000K0KWashington
 Brief Description: EVENT NARRATIVE: This segment is the fourth of six segments of this long-track tornado. Numerous trees were snapped or uprooted in this segment. Estimated maximum wind speed based on this damage was 125 mph. The tornado moved northeastward and crossed back into Benton County, Arkansas. EPISODE NARRATIVE: Unseasonably warm and moist air spread into northwestern Arkansas ahead of a cold front. Scattered thunderstorms developed in the late evening and early morning hours ahead of the cold front as a weak upper level disturbance passed through the region. Large hail and damaging wind gusts occurred with some of those storms. Another round of storms developed on the cold front over eastern Oklahoma as it pushed into the area. Weak to moderate instability combined with very strong low level wind shear created an environment that supported supercell thunderstorm structures. Several supercells developed resulting in large hail and damaging wind gusts in the hours just before and after sunrise on the 31st. One of these supercells produced a long-track, strong tornado that killed four people in and near the town of Cincinnati in Washington County. Debris was transported by the tornado into northern Benton County and was reported in Bella Vista and Pea Ridge. The Northwest Arkansas Regional Airport (XNA) was closed for three hours to remove the debris from the flight line. Another supercell produced a short-lived, weak tornado in Carroll County that moved into Missouri.
31.22010-12-31236°08'N / 94°21'W36°09'N / 94°20'W2.00 Miles300 Yards0075K0KBenton
 Brief Description: EVENT NARRATIVE: This segment is the fifth of six segments of this long-track tornado. The tornado severely damaged a permanent home, destroyed a barn, snapped or uprooted numerous trees, and snapped power poles. The maximum estimated wind speed in this segment of the tornado based on this damage was 125 mph. The tornado moved northeast and back into Washington County, Arkansas. EPISODE NARRATIVE: Unseasonably warm and moist air spread into northwestern Arkansas ahead of a cold front. Scattered thunderstorms developed in the late evening and early morning hours ahead of the cold front as a weak upper level disturbance passed through the region. Large hail and damaging wind gusts occurred with some of those storms. Another round of storms developed on the cold front over eastern Oklahoma as it pushed into the area. Weak to moderate instability combined with very strong low level wind shear created an environment that supported supercell thunderstorm structures. Several supercells developed resulting in large hail and damaging wind gusts in the hours just before and after sunrise on the 31st. One of these supercells produced a long-track, strong tornado that killed four people in and near the town of Cincinnati in Washington County. Debris was transported by the tornado into northern Benton County and was reported in Bella Vista and Pea Ridge. The Northwest Arkansas Regional Airport (XNA) was closed for three hours to remove the debris from the flight line. Another supercell produced a short-lived, weak tornado in Carroll County that moved into Missouri.
31.61983-11-22335°51'N / 94°45'W36°04'N / 94°31'W19.00 Miles100 Yards00250K0Le Flore
32.12010-12-31236°09'N / 94°20'W36°12'N / 94°16'W4.00 Miles250 Yards01100K0KWashington
 Brief Description: EVENT NARRATIVE: This segment is the sixth of six segments of this long-track tornado. The tornado overturned a box truck on Highway 412, injuring its driver, severely damaged a couple permanent homes, severely damaged a mobile home, snapped or uprooted numerous trees, and snapped numerous power poles. The maximum estimated wind speed in this segment of the tornado based on this damage was 125 mph. EPISODE NARRATIVE: Unseasonably warm and moist air spread into northwestern Arkansas ahead of a cold front. Scattered thunderstorms developed in the late evening and early morning hours ahead of the cold front as a weak upper level disturbance passed through the region. Large hail and damaging wind gusts occurred with some of those storms. Another round of storms developed on the cold front over eastern Oklahoma as it pushed into the area. Weak to moderate instability combined with very strong low level wind shear created an environment that supported supercell thunderstorm structures. Several supercells developed resulting in large hail and damaging wind gusts in the hours just before and after sunrise on the 31st. One of these supercells produced a long-track, strong tornado that killed four people in and near the town of Cincinnati in Washington County. Debris was transported by the tornado into northern Benton County and was reported in Bella Vista and Pea Ridge. The Northwest Arkansas Regional Airport (XNA) was closed for three hours to remove the debris from the flight line. Another supercell produced a short-lived, weak tornado in Carroll County that moved into Missouri.
32.11961-05-07336°48'N / 95°06'W36°51'N / 94°57'W8.90 Miles400 Yards01250K0Craig
32.31974-06-08336°19'N / 95°34'W36°37'N / 95°12'W29.00 Miles100 Yards0025K0Craig
32.71960-05-05236°44'N / 95°00'W37°00'N / 94°37'W28.00 Miles500 Yards00250K0Ottawa
32.81974-06-08336°10'N / 95°25'W36°13'N / 95°16'W9.00 Miles100 Yards0725.0M0Mayes
32.81965-05-15236°52'N / 94°52'W003K0Ottawa
33.71981-04-19235°58'N / 95°08'W35°58'N / 95°04'W3.60 Miles600 Yards002.5M0Creek
33.91983-03-26236°48'N / 95°09'W1.00 Mile50 Yards0125K0Craig
34.01956-04-03436°46'N / 94°58'W37°00'N / 94°46'W19.50 Miles400 Yards046250K0Ottawa
34.11970-11-19235°58'N / 94°29'W36°10'N / 94°13'W20.30 Miles300 Yards0125K0Washington
34.71975-04-24436°50'N / 94°35'W36°51'N / 94°28'W6.50 Miles500 Yards32225.0M0Newton
35.11975-04-24236°48'N / 95°09'W36°52'N / 95°06'W5.20 Miles77 Yards03250K0Craig
35.81970-06-11335°56'N / 94°31'W36°12'N / 94°06'W29.60 Miles250 Yards1442.5M0Washington
36.11981-04-19335°55'N / 95°06'W35°55'N / 95°03'W3.00 Miles100 Yards003K0Creek
36.22010-05-13236°10'N / 95°26'W36°11'N / 95°22'W4.00 Miles1000 Yards02300K0KMayes
 Brief Description: EVENT NARRATIVE: The tornado that developed near Inola in Rogers County moved northeast toward Chouteau. In Mayes County, the tornado severely damaged several homes, destroyed a metal shop, snapped or uprooted numerous trees, and snapped numerous high tension wire poles. The estimated peak wind in this tornado based on this damage in Mayes County was 115 mph. Two people were injured by flying debris. EPISODE NARRATIVE: A line of thunderstorms intensified as it moved into eastern Oklahoma during the early morning hours of the 13th. A number of tornadoes developed on the leading edge of the bowing line of storms over northeastern Oklahoma. The storms also produced damaging wind gusts.
36.62006-03-12236°21'N / 94°14'W36°23'N / 94°04'W8.00 Miles250 Yards0010.0M0Benton
 Brief Description: The supercell cycled again and produced a third tornado that moved through the southern portion of Bentonville and Little Flock damaging or destroying 125 homes.
36.91974-04-13236°52'N / 94°30'W0.50 Mile100 Yards003K0Newton
37.21964-05-10335°52'N / 94°57'W2.00 Miles440 Yards0025K0Cherokee
37.21983-04-29236°33'N / 95°27'W1.50 Miles100 Yards00250K0Rogers
37.31967-05-30236°20'N / 94°10'W36°20'N / 94°07'W3.00 Miles33 Yards0025K0Hardin
37.31960-08-07336°58'N / 94°48'W36°54'N / 94°46'W4.70 Miles200 Yards0025K0Ottawa
38.42008-05-10436°59'N / 95°01'W36°55'N / 94°37'W24.00 Miles1760 Yards615015.0M0KOttawa
 Brief Description: EVENT NARRATIVE: This tornado developed at 1620 cst in northeastern Craig County and continued into Ottawa County. The tornado moved rapidly eastward toward the town of Picher where it destroyed about 200 homes, killed six people, and injured another 150 people at about 540 pm. Damage in and around Picher was rated EF-4 on the Enhanced Fujita Scale. The tornado began moving more southeasterly near Picher and struck the north side of Quapaw. While this tornado was beginning to weaken east of Quapaw, the supercell produced another tornado a few miles east-northeast of Quapaw that merged with this tornado just east of I-44. After the merger of the two tornadoes, a single tornadic circulation reintensified and became about a mile wide for several miles before moving into Newton County MO. EPISODE NARRATIVE: Elevated severe thunderstorms containing large hail developed north of a warm front that was moving slowly northward across eastern Oklahoma and west central Arkansas during the morning and early afternoon of the 10th. Another round of severe thunderstorms developed late in the afternoon as a dry line approached the area from the west. Extreme instability and strong vertical wind shear resulted in the development of long-lived supercell thunderstorms that moved across eastern Oklahoma and northwestern Arkansas during the late afternoon and evening. Several of these supercells became tornadic and a few produced long-lived damaging tornadoes. One such supercell developed and moved along the Oklahoma-Kansas border and then into southwestern Missouri. This storm produced a tornado in northeastern Craig County OK that remained on the ground for 29 miles in Oklahoma, continued for about 31 miles in Newton County MO, and finally dissipated about 15 miles into Barry County MO. It produced EF-4 damage in several locations, including Picher, a small town in north-central Ottawa County OK. Twenty-one fatalities, over 350 injuries, and an estimated $60 million in property damage resulted from this tornado in Oklahoma and Missouri. Six of the fatalities and about 150 injuries occurred in Picher OK. Other strong tornadoes developed and moved across portions of Pittsburg and Latimer Counties. A EF-2 tornado was on the ground for about eight miles west of McAlester, damaging numerous homes in its path. Another EF-2 tornado developed southwest of Hartshorne in Pittsburg County and moved 19 miles before dissipating just east of Yanush in Latimer County. Four injuries resulted from that tornado and numerous homes were severely damaged or destroyed.
38.51954-03-24336°21'N / 94°17'W36°29'N / 93°57'W20.60 Miles400 Yards043K0Benton
38.71975-04-24436°51'N / 94°28'W36°52'N / 94°22'W5.40 Miles500 Yards000K0Christian
39.31988-11-15236°30'N / 94°14'W36°38'N / 94°02'W10.00 Miles23 Yards000K0Mcdonald
39.51967-01-25236°22'N / 95°36'W36°30'N / 95°26'W12.90 Miles33 Yards0025K0Rogers
39.51990-05-15236°26'N / 95°33'W36°26'N / 95°29'W4.00 Miles73 Yards08250K0Rogers
40.21999-06-01335°58'N / 95°15'W35°54'N / 95°15'W2.00 Miles350 Yards251.5M0Cherokee
 Brief Description: A strong tornado, rated an F3, touched down in far western Cherokee County, possibly as a waterspout on Fort Gibson Lake. The tornado moved south onshore and through the rural Amber Hills housing area, crossing OK Hwy 51, and lifting after tracking through much of the Sequoyah State Park. In the Amber Hills and Hammer Hill Road areas, a total of 68 homes sustained some form of damage. Of that, 17 single family dwellings and 13 mobile homes were destroyed. Eight single family dwellings sustained major damage and 11 others had minor damage. One mobile home sustained minor damage. Fourteen other single family dwellings and four other mobile homes were affected. In one of the destroyed mobile homes, an elderly man and woman were inside. The woman was killed immediately, and the man was seriously injured, dying one week later in a hospital of tornado-related complications. This becomes eastern Oklahoma's first killer tornado since the April 1994 Catoosa tornado. Across OK Hwy 51 in Sequoyah State Park, between 400 and 500 trees were lost to the tornado. The carport at the park manager's residence was destroyed, and an RV was turned on its side. Fortunately, most Memorial Day campers had cleared out, therefore there were no injuries in the park. F69MH, M69MH Summary of events for the afternoon and evening of June 1 1999: A cold front moving in from the northwest moved into an extremely unstable air mass on the afternoon of June 1. Along the front, an isolated supercell thunderstorm developed around the Pryor/Locust Grove area and then moved in a slow and unusual south-southwest direction. This storm produced very large hail in addition to several strong tornadoes. This storm also produced eastern Oklahoma's first killer tornado in at least half of a decade.
41.01960-11-15235°48'N / 94°51'W1.00 Mile50 Yards0025K0Cherokee
41.12008-04-10235°49'N / 94°30'W35°54'N / 94°28'W6.00 Miles400 Yards0075K0KWashington
 Brief Description: EVENT NARRATIVE: The strong tornado that began 5.5 miles east-southeast of Stillwell in Adair County Oklahoma moved into Washington County. The tornado destroyed a mobile home, destroyed a barn, rolled a vehicle, caused extensive tree damage, and snapped power poles. EPISODE NARRATIVE: Severe thunderstorms occurred across Northwest Arkansas during the evening and early morning hours on the 9th and 10th.
41.21993-10-08236°24'N / 94°04'W1.50 Miles100 Yards00500K0Benton
 Brief Description: An F2 tornado touched down in Avoca and travelled about one and a half miles before it dissipated. While the tornado was on the ground, it damaged about ten homes. A mobile home and two chicken houses were completely destroyed. A large number of trees were also blown down.
41.21982-04-02236°24'N / 95°33'W1.00 Mile50 Yards00250K0Rogers
41.41970-06-11335°41'N / 94°46'W35°56'N / 94°31'W22.20 Miles33 Yards010K0Adair
41.71966-04-11235°52'N / 95°14'W35°52'N / 95°07'W6.50 Miles20 Yards00250K0Cherokee
42.11979-04-11235°50'N / 94°23'W35°59'N / 94°19'W11.10 Miles200 Yards04250K0Washington
42.41959-09-27436°51'N / 95°15'W37°00'N / 95°08'W12.20 Miles33 Yards000K0Craig
42.41976-03-26235°52'N / 94°25'W2.00 Miles77 Yards00250K0Washington
43.01954-03-24236°43'N / 94°13'W36°45'N / 94°06'W6.60 Miles50 Yards000K0Mcdonald
43.21956-04-03437°00'N / 94°46'W37°02'N / 94°44'W2.70 Miles50 Yards052.5M0Cherokee
43.32008-05-10436°55'N / 94°37'W36°52'N / 94°03'W31.00 Miles1760 Yards1420035.0M0KNewton
 Brief Description: EVENT NARRATIVE: This tornado is an extension of the Ottawa County, Oklahoma tornado. A National Weather Service storm survey revealed that an EF-4 tornado crossed into Missouri just north of Iris Road, and tracked east southeast all the way across Newton County to just north of Fairview. Several people were killed in automobiles, including a firefighter who was storm spotting, as the tornado briefly reached EF4 intensity near the intersection of Highway 43 and Iris Road. One vehicle at this location was thrown 5/8s of a mile. The tornado then extended to a mile wide and EF3 intensity as it tracked across the intersection of Highway 86 and BB. Many of the 14 fatalities and 200 injuries occurred from just west of Highway 43 to Highway 86. The communities of Granby and Newtonia were also directly impacted from this tornado. EPISODE NARRATIVE: Three tornadoes were spawned from supercell thunderstorms that developed over southeast Kansas. These storms quickly moved into southwest Missouri causing devestating damage to homes, businesses, and trees in Newton, Barry, and Jasper counties. One tornado, with an intensity that ranged from EF-4 to EF-1, killed 15 people as it tracked through Newton and Barry counties, while another tornado killed one person in Jasper County.
43.41961-05-08235°48'N / 94°33'W0025K0Adair
43.71999-05-04335°45'N / 94°28'W36°00'N / 94°15'W22.00 Miles175 Yards0080K0Washington
 Brief Description: A significant long-track tornado first touched down 4 miles west of Short, OK, and tracked 39 miles to a point about 7 miles southwest of Fayetteville, AR. Along the way, this tornado passed through portions of four counties but mainly affected sparsely-populated areas. It reached its peak strength as an F3 tornado in extreme southeast Adair County, OK, but mainly caused F2 damage in Washington County, AR. Fortunately, this tornado lifted before it reached heavily-populated Fayetteville. The tornado's first real property damage took place at a property between the Hogeye and Strickland communities, where the tornado peeled off the roof to a home, shattered windows, uprooted trees, destroyed two barns, and wiped a porch off of its stone foundation. Numerous trees were blown down along County Roads 212 and 214. Only a few miles away in the Cove Creek community, south of Prarie Grove, the tornado blew off a home's roof, demolished an enclosed garage, and destroyed a barn. A flagpole was bent almost in half, and a road sign ended up wrapped around a mailbox. The tornado uprooted a 200-year old walnut tree which then fell onto a pickup truck. About a half-dozen other oak and cedar trees on one property dating back at least 150 years were snapped or uprooted. The Washington County Judge's Office supplied a picture of a church near Cove Creek that was moved off of its foundation. Several poultry buildings along the tornado's path were also damaged. The property damage listed in this entry is for just that damage sustained in Washington County, while the F-rating reflects the tornado's peak strength in Adair County, OK. Summary of events for May 4 1999: Following a record tornado outbreak in Oklahoma on May 3-4, a significant severe weather outbreak affected northwest Arkansas on the morning and afternoon of May 4 as a vigorous upper level system continued to move slowly east. While there were many individual storms in the area on May 4, the most outstanding storm of the day was a supercell thunderstorm that spawned a tornado in Sequoyah County, OK, which then moved northeast for 39 miles to near Fayetteville. Other storms produced damaging winds and large hail.
43.92008-04-10235°45'N / 94°48'W35°46'N / 94°46'W3.00 Miles300 Yards00100K0KAdair
 Brief Description: EVENT NARRATIVE: An NWS storm survey determined that a strong tornado destroyed several mobile homes, caused extensive tree damage, destroyed barns and other outbuildings, and snapped power poles. EPISODE NARRATIVE: Severe thunderstorms occurred across eastern Oklahoma from the evening of the 9th into the morning of the 10th.
43.92008-05-10237°00'N / 95°08'W36°59'N / 95°01'W5.00 Miles500 Yards00600K0KCraig
 Brief Description: EVENT NARRATIVE: A tornado developed just south of the Oklahoma-Kansas border north-northwest of Welch. It moved rapidly east across northeastern Craig County, intensifying and widening as it moved into Ottawa County. In Craig County, the tornado destroyed several mobile homes, severely damaged about a dozen other homes, snapped or uprooted numerous trees, and blew down power poles and power lines. EPISODE NARRATIVE: Elevated severe thunderstorms containing large hail developed north of a warm front that was moving slowly northward across eastern Oklahoma and west central Arkansas during the morning and early afternoon of the 10th. Another round of severe thunderstorms developed late in the afternoon as a dry line approached the area from the west. Extreme instability and strong vertical wind shear resulted in the development of long-lived supercell thunderstorms that moved across eastern Oklahoma and northwestern Arkansas during the late afternoon and evening. Several of these supercells became tornadic and a few produced long-lived damaging tornadoes. One such supercell developed and moved along the Oklahoma-Kansas border and then into southwestern Missouri. This storm produced a tornado in northeastern Craig County OK that remained on the ground for 29 miles in Oklahoma, continued for about 31 miles in Newton County MO, and finally dissipated about 15 miles into Barry County MO. It produced EF-4 damage in several locations, including Picher, a small town in north-central Ottawa County OK. Twenty-one fatalities, over 350 injuries, and an estimated $60 million in property damage resulted from this tornado in Oklahoma and Missouri. Six of the fatalities and about 150 injuries occurred in Picher OK. Other strong tornadoes developed and moved across portions of Pittsburg and Latimer Counties. A EF-2 tornado was on the ground for about eight miles west of McAlester, damaging numerous homes in its path. Another EF-2 tornado developed southwest of Hartshorne in Pittsburg County and moved 19 miles before dissipating just east of Yanush in Latimer County. Four injuries resulted from that tornado and numerous homes were severely damaged or destroyed.
43.91960-05-05235°56'N / 95°25'W35°59'N / 95°21'W5.10 Miles200 Yards00250K0Wagoner
44.01961-03-12236°57'N / 94°27'W36°58'N / 94°26'W1.90 Miles50 Yards06250K0Newton
44.12008-04-10235°47'N / 94°32'W35°49'N / 94°30'W4.00 Miles400 Yards0050K0KAdair
 Brief Description: EVENT NARRATIVE: An NWS storm survey determined that a strong tornado destroyed a mobile home, caused extensive tree damage, and snapped power poles. This tornado continued into Washington County Arkansas, lifting about 4 miles southwest of Lincoln. EPISODE NARRATIVE: Severe thunderstorms occurred across eastern Oklahoma from the evening of the 9th into the morning of the 10th.
44.71995-04-17235°51'N / 95°18'W35°52'N / 95°13'W4.50 Miles125 Yards00500K0Wagoner
45.41956-04-03437°02'N / 94°44'W37°03'N / 94°36'W7.40 Miles50 Yards06250K0Kiowa
45.71970-06-11336°12'N / 94°06'W36°21'N / 93°54'W15.20 Miles250 Yards002.5M0Benton
46.91954-04-30336°00'N / 94°10'W36°02'N / 94°03'W6.90 Miles33 Yards00250K0Washington
47.01966-05-11236°10'N / 95°41'W36°11'N / 95°32'W8.40 Miles50 Yards02250K0Rogers
47.21972-12-30236°39'N / 94°03'W36°42'N / 94°01'W3.80 Miles220 Yards0225K0Barry
47.32008-04-10236°00'N / 94°06'W36°02'N / 94°06'W3.00 Miles600 Yards00125K0KWashington
 Brief Description: EVENT NARRATIVE: An NWS storm survey determined that a strong tornado caused major damage to a permanent home, damaged several other homes, caused extensive tree damage, and snapped power poles. EPISODE NARRATIVE: Severe thunderstorms occurred across Northwest Arkansas during the evening and early morning hours on the 9th and 10th.
47.41996-05-26236°50'N / 95°29'W36°55'N / 95°21'W8.00 Miles880 Yards0075K0Craig
47.41974-06-08336°05'N / 95°46'W36°10'N / 95°25'W20.40 Miles100 Yards0025.0M0Wagoner
47.61996-05-26236°36'N / 95°39'W36°50'N / 95°29'W18.00 Miles880 Yards00200K0Nowata
47.71954-04-30335°45'N / 94°19'W36°00'N / 94°10'W19.20 Miles440 Yards01250K0Washington
47.71958-05-31236°53'N / 94°12'W0.50 Mile20 Yards0025K0Newton
48.01959-09-03237°05'N / 94°42'W1.00 Mile200 Yards013K0Cherokee
48.91991-04-26436°27'N / 95°43'W36°29'N / 95°39'W4.00 Miles1300 Yards02225.0M0Rogers
49.01959-09-27437°00'N / 95°08'W37°07'N / 95°06'W8.20 Miles440 Yards1125K0Labette
49.11954-04-30336°02'N / 94°03'W36°06'N / 94°00'W5.40 Miles33 Yards00250K0Washington
49.41982-08-27235°51'N / 95°23'W1.00 Mile50 Yards0225K0Wagoner
49.41999-05-04335°43'N / 94°29'W35°45'N / 94°27'W3.00 Miles175 Yards003K0Crawford
 Brief Description: A significant long-track tornado first developed 4 miles west of Short, OK, moving northeast to about 7 miles southwest of Fayetteville, AR. This tornado reached its peak strength as an F3 tornado as it clipped extreme southeast Adair County, OK. This tornado then clipped extreme northwest Crawford County, passing through an unpopulated, forested area in the Ozark National Forest. An aerial survey by NWS personnel just west of the Oklahoma/Arkansas state line west of Natural Dam revealed that every tree in a hardwood forest was completely leveled. Property damage listed with this entry reflects tree damage sustained in Crawford County, while the F-rating reflects the tornado's peak strength in Adair County, OK. Summary of events for May 4 1999: Following a record tornado outbreak in Oklahoma on May 3-4, a significant severe weather outbreak affected northwest Arkansas on the morning and afternoon of May 4 as a vigorous upper level system continued to move slowly east. While there were many individual storms in the area on May 4, the most outstanding storm of the day was a supercell thunderstorm that spawned a tornado in Sequoyah County, OK, which then moved northeast for 39 miles to near Fayetteville. Other storms produced damaging winds and large hail.
49.61959-05-09336°31'N / 95°46'W36°40'N / 95°34'W15.20 Miles50 Yards00250K0Rogers


* 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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