Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 263, NWS Norman, OK

April 29, 20094 counties in Oklahoma; Archer County, Clay County, Wichita County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Apr 29, 2009, 11:27 PM CDT for 4 counties in Oklahoma; Archer County, Clay County, Wichita County, Texas. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 29, 2009, 11:27 PM CDT (04:27 UTC)
Expired: Apr 30, 2009, 12:30 AM CDT
In force: 63 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Comanche County, OK, Cotton County, OK, Jefferson County, OK, Stephens County, OK, Archer County, TX, Clay County, TX, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 67 km from the middle of the area, began a volume at 04:31 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 29, 9:27 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 29, 9:36 PM CDT, 1 hour 51 minutes earlier.

Area forecast discussion, Apr 29, 9:36 PM CDT, 1 hour 51 minutes before

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Hazardous weather outlook, Apr 29, 11:55 AM CDT, 11 hours 32 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
1155 AM CDT WED APR 29 2009

OKZ004>048-050>052-TXZ083>090-301000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1155 AM CDT WED APR 29 2009

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF
OKLAHOMA AND ALL OF WESTERN NORTH TEXAS THROUGH TONIGHT.

LOCATION...
THE SLIGHT RISK AREA COVERS AN AREA SOUTHWEST OF A LINE FROM
CHEROKEE... TO EL RENO... TO ADA AND ATOKA OKLAHOMA. THIS INCLUDES
ALL OF WESTERN NORTH TEXAS.

TIMING...
SEVERE THUNDERSTORMS WILL BE POSSIBLE THROUGH 3 AM.

IMPACTS...
HAIL TO THE SIZE OF GOLF BALLS AND WIND GUSTS TO 70 MPH. AN ISOLATED
TORNADO CAN NOT BE RULED OUT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS INTO THE
OVERNIGHT HOURS.

DISCUSSION...
A LARGE AREA OF THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE
ACROSS PORTIONS OF SOUTHERN OKLAHOMA AND NORTH TEXAS THIS AFTERNOON.
MEANWHILE... A DRYLINE WILL CONTINUE TO DEVELOP ACROSS THE CENTRAL
PANHANDLES THIS AFTERNOON. AN UPPER LEVEL DISTURBANCE WILL ALSO MOVE
FROM THE SOUTHWEST U.S. ACROSS THE SOUTHERN PLAINS LATER TODAY AND
TONIGHT. WITH HEATING THE AIRMASS EAST OF THE DRYLINE IS EXPECTED TO
BECOME UNSTABLE LATER THIS AFTERNOON. ADDITIONAL SCATTERED
THUNDERSTORMS MAY DEVELOP NEAR AND EAST OF THE DRYLINE LATE THIS
AFTERNOON AND THIS EVENING MOVING ACROSS PORTIONS OF OKLAHOMA AND
WESTERN NORTH TEXAS TONIGHT. ANOTHER FOCUS FOR THUNDERSTORM
DEVELOPMENT IS AN OUTFLOW BOUNDARY FROM THE MORNING THUNDERSTORMS
THAT EXTENDS ACROSS NORTH TEXAS. SOME OF THE STORMS MAY BECOME
SEVERE THIS AFTERNOON AND TONIGHT ACROSS PARTS OF OKLAHOMA AND
WESTERN NORTH TEXAS... WITH LARGE HAIL AND STRONG WINDS THE MAIN
CONCERN. HOWEVER... AN ISOLATED TORNADO CAN NOT BE RULED OUT...
PRIMARILY IN THE AREA NEAR THE OUTFLOW BOUNDARY.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT THURSDAY APR 30.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR... 100 PERCENT.

OTHER HAZARDOUS WEATHER...
EXCESSIVE RAINFALL FROM THUNDERSTORMS TODAY MAY RESULT IN FLASH
FLOODING ACROSS PORTIONS OF SOUTHERN OKLAHOMA AND WESTERN NORTH
TEXAS. A FLASH FLOOD WATCH IS IN AFFECT THROUGH 7 AM.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

THUNDERSTORM OUTLOOK...
THE RISK OF SEVERE STORMS WILL CONTINUE EACH DAY THROUGH AT LEAST
FRIDAY... AND POSSIBLY INTO THE WEEKEND.

OTHER HAZARDOUS WEATHER...
PERIODS OF HEAVY RAINFALL ARE EXPECTED INTO EARLY NEXT WEEK...WHICH
COULD LEAD TO BOTH LOCALIZED FLOODING AND MAINSTEM RIVER FLOODING.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM
THURSDAY.

MAXWELL

In the hours before

Local storm report, Apr 29, 10:55 PM CDT, 32 minutes before

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Local storm report, Apr 29, 10:56 PM CDT, 31 minutes before

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Local storm report, Apr 29, 11:12 PM CDT, 15 minutes before

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Local storm report, Apr 29, 11:14 PM CDT, 13 minutes before

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Local storm report, Apr 29, 11:20 PM CDT, 7 minutes before

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Local storm report, Apr 29, 11:23 PM CDT, 4 minutes before

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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 8:37 PM CDT	River Flood Warning	OUN	Love	4 days
Apr 29, 8:50 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	55 min
Apr 29, 9:05 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	40 min
Apr 29, 9:11 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	49 min
Apr 29, 9:21 PM CDT	Areal Flood Warning	OUN	Carter, Cotton, Jefferson, Love, Marshall, Stephens	6 hr
Apr 29, 9:29 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	61 min
Apr 29, 10:25 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	65 min
Apr 29, 10:37 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	53 min
Apr 29, 11:48 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Love, Murray	57 min
Apr 30, 1:32 AM CDT	Areal Flood Advisory	OUN	Carter, Garvin, Johnston, Murray, Pontotoc, Stephens	3 hr
Apr 30, 2:13 AM CDT	Areal Flood Warning	OUN	Atoka, Bryan, Carter, Jefferson, Love, Marshall	6 hr
Apr 30, 2:35 AM CDT	River Flood Warning	OUN	Comanche, Cotton	42 hr
Apr 30, 8:57 AM CDT	Flash Flood Warning	OUN	Kay	4 hr
Apr 30, 12:52 PM CDT	River Flood Warning	OUN	Harper, Woods, Woodward	25 hr
Apr 30, 2:11 PM CDT	River Flood Warning	OUN	Cotton, Jefferson, Tillman	44 hr
Apr 30, 3:14 PM CDT	Flash Flood Watch	OUN	Alfalfa, Atoka, Blaine, Bryan, Caddo, Canadian and 38 more	61 hr
Apr 29, 8:04 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	56 min
Apr 29, 8:55 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Foard, Knox, Wilbarger	50 min
Apr 29, 9:40 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Foard, Hardeman, Knox, Wichita, Wilbarger	65 min
Apr 29, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman, Wilbarger	60 min
Apr 29, 10:44 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Knox	46 min
Apr 29, 11:28 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	62 min
Apr 30, 12:10 AM CDT	Areal Flood Advisory	OUN	Archer, Clay	3 hr
Apr 30, 12:38 AM CDT	Areal Flood Advisory	OUN	Foard, Hardeman, Wilbarger	112 min
Apr 30, 12:54 AM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Wilbarger	66 min
Apr 30, 1:58 AM CDT	Severe Thunderstorm Warning	OUN	Archer, Wichita, Wilbarger	62 min
Apr 30, 2:49 AM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Wichita, Wilbarger	71 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2009 Severe Thunderstorm Warnings in Texas, 2009 Every severe thunderstorm warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.