Storm Events Database

Event Details

Event Tornado
-- Scale EF4
-- Length 9.6 Miles
-- Width 650 Yards
State OKLAHOMA
County/Area MCCLAIN
WFO OUN
Report Source NWS Storm Survey
NCDC Data Source CSV
Begin Date 2011-05-24 16:38:00.0 CST-6
Begin Location 3N BLANCHARD
Begin Lat/Lon 35.19/-97.67
End Date 2011-05-24 16:53:00.0 CST-6
End Location 4N NEWCASTLE
End Lat/Lon 35.3/-97.59
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage
Crop Damage
Episode Narrative A tornado outbreak occurred over parts of northern and central Oklahoma during the day on the 24th, with violent tornadoes devastating several communities. By the end of the day, one EF-5, two EF-4, and two EF-3 tornadoes destroyed buildings, ripped up trees and power poles, and unfortunately, resulted in 11 deaths. The day began with a strong upper level trough ejecting out of the southwest United States. The trough took on a negative tilt as it approached the southern Plains. A strong jet stream was located at both the middle and upper levels rotating around the upper trough. At the surface, a low pressure strengthened rapidly over northwest Oklahoma, keeping the low-level flow of warm, moist air to flow east of a dry line that had moved into western Oklahoma. Thunderstorms developed by early afternoon over western Oklahoma, and quickly became supercellular as they moved northeast. Strong low-level rotation developed early, with the first tornado occurring over Blaine county, and moved northeast into Major county. Another supercell rapidly gained low-level rotation as it moved from Caddo into Canadian County. This tornado became the strongest of them all as it moved north of El Reno, west of Piedmont, and to south of Guthrie in Logan county. Nine people died as a result of this tornado. Two more powerful supercells developed over Grady county, and they moved northeast into McClain and Cleveland counties. Finally, the final tornado occurred east of Norman into Pottawatomie county. The timing of this outbreak could not have come at a worse time, as rush hour was just unfolding as the tornadoes neared the Oklahoma City metro area.
Event Narrative This tornado is labeled C1 (Segment #2 of the Chickasha-Blanchard-Newcastle tornado). Significant damage continued as the violent tornado moved over the McClain county border. This may have been the strongest portion of this tornado, with wind speeds near 200 mph. Well-built homes were destroyed, with some cleaned off of their foundation. A concrete dome home was severely damage, mainly by the flying debris. Trees were debarked or destroyed. Very little was left standing for the first few miles into McClain county. Fairly consistent EF-3, with brief periods of EF-4 damage occurred as the tornado neared/crossed Highway 9, near the Highway 76 junction. The tornado began to weaken as it moved toward the Cleveland county border, with mainly trees and power poles/lines snapped. The tornado continued into Cleveland County. Monetary damage estimates were not available.


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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 11 342 9.50K 0.00K
HOBART KIOWA CO. OK 05/24/2011 13:29 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
MOUNTAIN VIEW KIOWA CO. OK 05/24/2011 14:15 CST-6 Hail 1.00 in. 0 0 0.00K 0.00K
HUCMAC DEWEY CO. OK 05/24/2011 14:20 CST-6 Tornado EF1 0 0 0.00K 0.00K
CANTON LAKE DAM BLAINE CO. OK 05/24/2011 14:21 CST-6 Tornado EF3 0 2 0.00K 0.00K
EAKLY CADDO CO. OK 05/24/2011 14:29 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
LOOKEBA CADDO CO. OK 05/24/2011 14:31 CST-6 Tornado EF3 0 0 0.00K 0.00K
FAY DEWEY CO. OK 05/24/2011 14:33 CST-6 Hail 3.00 in. 0 0 0.00K 0.00K
DANE MAJOR CO. OK 05/24/2011 14:34 CST-6 Tornado EF3 1 0 0.00K 0.00K
FAIRVIEW MAJOR CO. OK 05/24/2011 14:47 CST-6 Tornado EF0 0 0 0.00K 0.00K
CALUMET CANADIAN CO. OK 05/24/2011 14:50 CST-6 Tornado EF5 7 112 0.00K 0.00K
LAWTON COMANCHE CO. OK 05/24/2011 15:16 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
EL RENO CANADIAN CO. OK 05/24/2011 15:18 CST-6 Thunderstorm Wind 131 kts. MG 0 0 0.00K 0.00K
LAKE ELLSWORTH DAM COMANCHE CO. OK 05/24/2011 15:31 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
RICHLAND CANADIAN CO. OK 05/24/2011 15:37 CST-6 Tornado EF0 0 0 0.00K 0.00K
MIDWEST CITY OKLAHOMA CO. OK 05/24/2011 15:43 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
CASHION KINGFISHER CO. OK 05/24/2011 15:55 CST-6 Tornado EF3 0 46 0.00K 0.00K
NAVINA LOGAN CO. OK 05/24/2011 15:59 CST-6 Tornado EF3 2 23 0.00K 0.00K
MARLOW STEPHENS CO. OK 05/24/2011 16:00 CST-6 Thunderstorm Wind 60 kts. MG 0 0 0.00K 0.00K
(PNC)PONCA CITY ARPT KAY CO. OK 05/24/2011 16:02 CST-6 Thunderstorm Wind 53 kts. MG 0 0 0.00K 0.00K
NORGE GRADY CO. OK 05/24/2011 16:06 CST-6 Tornado EF4 1 48 0.00K 0.00K
BRADLEY GRADY CO. OK 05/24/2011 16:26 CST-6 Tornado EF3 0 0 0.00K 0.00K
LANGSTON LOGAN CO. OK 05/24/2011 16:30 CST-6 Thunderstorm Wind 51 kts. MG 0 0 0.00K 0.00K
NEWKIRK KAY CO. OK 05/24/2011 16:30 CST-6 Thunderstorm Wind 50 kts. MG 0 0 0.00K 0.00K
CRINER MCCLAIN CO. OK 05/24/2011 16:35 CST-6 Tornado EF4 0 61 0.00K 0.00K
NEWCASTLE MCCLAIN CO. OK 05/24/2011 16:37 CST-6 Hail 2.75 in. 0 0 0.00K 0.00K
BLANCHARD MCCLAIN CO. OK 05/24/2011 16:38 CST-6 Tornado EF4 0 0 0.00K 0.00K
NEWCASTLE MCCLAIN CO. OK 05/24/2011 16:45 CST-6 Tornado EF0 0 0 0.00K 0.00K
LAKE CARL BLACKWELL DAM PAYNE CO. OK 05/24/2011 16:50 CST-6 Tornado EF2 0 18 0.00K 0.00K
NOBLE CLEVELAND CO. OK 05/24/2011 16:50 CST-6 Hail 2.50 in. 0 0 0.00K 0.00K
NORMAN CLEVELAND CO. OK 05/24/2011 16:50 CST-6 Hail 1.50 in. 0 0 0.00K 0.00K
WASHINGTON MCCLAIN CO. OK 05/24/2011 16:50 CST-6 Hail 2.50 in. 0 0 0.00K 0.00K
MOORE CLEVELAND CO. OK 05/24/2011 16:53 CST-6 Tornado EF0 0 0 0.00K 0.00K
COYLE LOGAN CO. OK 05/24/2011 16:55 CST-6 Thunderstorm Wind 52 kts. MG 0 0 0.00K 0.00K
(OUN)NORMAN WESTHEIMER ARPT CLEVELAND CO. OK 05/24/2011 17:00 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
LUTHER OKLAHOMA CO. OK 05/24/2011 17:00 CST-6 Thunderstorm Wind 61 kts. EG 0 0 2.00K 0.00K
NOBLE CLEVELAND CO. OK 05/24/2011 17:00 CST-6 Hail 2.00 in. 0 0 0.00K 0.00K
NORMAN CLEVELAND CO. OK 05/24/2011 17:00 CST-6 Hail 2.00 in. 0 0 0.00K 0.00K
NORMAN CLEVELAND CO. OK 05/24/2011 17:00 CST-6 Hail 1.50 in. 0 0 0.00K 0.00K
GOLDSBY MCCLAIN CO. OK 05/24/2011 17:02 CST-6 Tornado EF1 0 0 0.00K 0.00K
DEL CITY OKLAHOMA CO. OK 05/24/2011 17:05 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
ELMORE CITY GARVIN CO. OK 05/24/2011 17:05 CST-6 Hail 0.88 in. 0 0 0.00K 0.00K
NORMAN CLEVELAND CO. OK 05/24/2011 17:05 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
NORMAN CLEVELAND CO. OK 05/24/2011 17:07 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
DEL CITY OKLAHOMA CO. OK 05/24/2011 17:14 CST-6 Hail 1.00 in. 0 0 0.00K 0.00K
MARIETTA LOVE CO. OK 05/24/2011 17:15 CST-6 Thunderstorm Wind 56 kts. EG 0 0 1.50K 0.00K
RINGLING JEFFERSON CO. OK 05/24/2011 17:20 CST-6 Thunderstorm Wind 68 kts. MG 0 0 0.00K 0.00K
RINGLING JEFFERSON CO. OK 05/24/2011 17:20 CST-6 Thunderstorm Wind 80 kts. EG 0 0 0.00K 0.00K
(TIK)TINKER AFB OKLAHOMA CO. OK 05/24/2011 17:23 CST-6 Hail 1.50 in. 0 0 0.00K 0.00K
MARIETTA LOVE CO. OK 05/24/2011 17:25 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
MARIETTA LOVE CO. OK 05/24/2011 17:25 CST-6 Hail 1.00 in. 0 0 0.00K 0.00K
(TIK)TINKER AFB OKLAHOMA CO. OK 05/24/2011 17:31 CST-6 Thunderstorm Wind 60 kts. MG 0 0 0.00K 0.00K
HEALDTON CARTER CO. OK 05/24/2011 17:35 CST-6 Hail 1.00 in. 0 0 0.00K 0.00K
DALE POTTAWATOMIE CO. OK 05/24/2011 17:36 CST-6 Tornado EF2 0 32 0.00K 0.00K
LONE GROVE CARTER CO. OK 05/24/2011 17:40 CST-6 Thunderstorm Wind 61 kts. EG 0 0 6.00K 0.00K
MOORE CLEVELAND CO. OK 05/24/2011 17:51 CST-6 Hail 1.00 in. 0 0 0.00K 0.00K
HEALDTON CARTER CO. OK 05/24/2011 18:01 CST-6 Hail 1.00 in. 0 0 0.00K 0.00K
RUBOTTOM LOVE CO. OK 05/24/2011 18:08 CST-6 Thunderstorm Wind 56 kts. EG 0 0 0.00K 0.00K
RAVIA JOHNSTON CO. OK 05/24/2011 18:30 CST-6 Tornado EF1 0 0 0.00K 0.00K
MADILL MARSHALL CO. OK 05/24/2011 19:02 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
ADA PONTOTOC CO. OK 05/24/2011 19:50 CST-6 Hail 1.25 in. 0 0 0.00K 0.00K
ADA PONTOTOC CO. OK 05/24/2011 20:01 CST-6 Hail 1.75 in. 0 0 0.00K 0.00K
Totals: 11 342 9.50K 0.00K