Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 239, NWS Norman, OK

April 29, 2009Jackson County, Tillman County, Oklahoma; Wilbarger County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Apr 29, 2009, 2:43 AM CDT for Jackson County, Tillman County, Oklahoma; Wilbarger County, Texas. It was in force for 62 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, 2:43 AM CDT (07:43 UTC)
Expired: Apr 29, 2009, 3:45 AM CDT
In force: 62 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Jackson County, OK, Tillman County, OK, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 20 km from the middle of the area, began a volume at 07:46 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 28, 9:25 PM CDT	Severe Thunderstorm Watch	SPC	6 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, 12:42 AM CDT, 2 hours 1 minute earlier.

Area forecast discussion, Apr 29, 12:42 AM CDT, 2 hours 1 minute before

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Hazardous weather outlook, Apr 28, 8:25 PM CDT, 6 hours 18 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
825 PM CDT TUE APR 28 2009

OKZ004>048-050>052-TXZ083>090-291000-
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-
825 PM CDT TUE APR 28 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 TONIGHT ACROSS PARTS
OF WESTERN NORTH TEXAS AND WESTERN OKLAHOMA.

LOCATION...
THE SLIGHT RISK AREA IS WEST OF A LINE FROM ARNETT... TO CLINTON...
TO FREDERICK... TO ELECTRA... TO SEYMOUR.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE AFTER
MIDNIGHT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR POSSIBLE SEVERE WEATHER OPERATIONS LATE
TONIGHT.

DISCUSSION...
A SLOW-MOVING SURFACE FRONT... EXTENDING FROM WESTERN NORTH TEXAS
EAST AND NORTHEAST ACROSS SOUTHERN AND EAST CENTRAL OKLAHOMA TUESDAY
EVENING... WILL LIFT SLOWLY NORTH AND WEAKEN OVERNIGHT. A SOUTHERLY
LOW-LEVEL JET WILL INCREASE OVERNIGHT ACROSS WESTERN TEXAS...
RESULTING IN NORTHWARD TRANSPORT OF WARM AND UNSTABLE AIR ALOFT
ACROSS THE SOUTHERN HIGH PLAINS. THE AIR NEAR THE SURFACE IS LIKELY
TO REMAIN RELATIVELY COOL AND STABLE... BUT SOUTHEASTERLY SURFACE
WINDS WILL RESULT IN UPSLOPE FLOW AND LIFT. THUNDERSTORMS WILL
INCREASE OVER THE SOUTHERN HIGH PLAINS DURING THE EVENING...
POSSIBLY MERGING INTO A LARGER THUNDERSTORM COMPLEX BEFORE MOVING
EAST INTO OKLAHOMA AND NORTH CENTRAL TEXAS LATE TONIGHT. VERTICAL
WIND SHEAR AND ELEVATED INSTABILITY WILL MEAN THAT LARGE HAIL WILL
BE THE MAIN CONCERN.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY APR 29.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...70 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...30 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WEDNESDAY AND
WEDNESDAY NIGHT OVER WESTERN NORTH TEXAS AND THE WESTERN HALF OF
OKLAHOMA. 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 LOCALIZED FLOODING AND MAIN-STEM RIVER FLOODING.

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

24

In the hours before

Local storm report, Apr 29, 1:10 AM CDT, 1 hour 33 minutes before

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Special weather statement, Apr 29, 1:26 AM CDT, 1 hour 17 minutes before

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Special weather statement, Apr 29, 1:30 AM CDT, 1 hour 13 minutes before

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Special weather statement, Apr 29, 2:01 AM CDT, 42 minutes before

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Local storm report, Apr 29, 2:18 AM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
218 AM CDT WED APR 29 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0215 AM     HAIL             3 ENE CHILLICOTHE       34.27N 99.47W
04/29/2009  E1.00 INCH       WILBARGER          TX   EMERGENCY MNGR

            FM 1924/COUNTY RD 85N

&&

THOREN

Local storm report, Apr 29, 2:31 AM CDT, 12 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, 2:06 AM CDT	Severe Thunderstorm Warning	OUN	Jackson	39 min
Apr 29, 2:09 AM CDT	Flash Flood Watch	OUN	Alfalfa, Blaine, Garfield, Grant, Kay, Kingfisher and 4 more	10 hr
Apr 29, 2:22 AM CDT	Areal Flood Advisory	OUN	Harper, Woods	3 hr
Apr 29, 3:56 AM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	79 min
Apr 29, 4:07 AM CDT	Areal Flood Advisory	OUN	Caddo, Comanche, Greer, Jackson, Kiowa, Tillman	3 hr
Apr 29, 5:12 AM CDT	Areal Flood Warning	OUN	Caddo, Comanche, Kiowa, Tillman	4 hr
Apr 29, 6:41 AM CDT	Areal Flood Advisory	OUN	Caddo, Grady, Greer, Jackson, Kiowa, Tillman and 1 more	3 hr
Apr 29, 7:38 AM CDT	Areal Flood Advisory	OUN	Harmon, Jackson	3 hr
Apr 29, 8:07 AM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	53 min
Apr 29, 8:18 AM CDT	Areal Flood Advisory	OUN	Cotton, Jefferson, Stephens	3 hr
Apr 29, 8:53 AM CDT	Flash Flood Warning	OUN	Cotton, Jefferson, Stephens	3 hr
Apr 29, 8:59 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Stephens	61 min
Apr 29, 9:17 AM CDT	Areal Flood Advisory	OUN	Caddo, Comanche, Greer, Jackson, Kiowa, Tillman	3 hr
Apr 29, 9:58 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Johnston, Love, Marshall, Murray	62 min
Apr 29, 10:06 AM CDT	Areal Flood Advisory	OUN	Carter, Garvin, Jefferson, Love, Murray	114 min
Apr 29, 10:07 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Murray, Pontotoc, Pottawatomie and 1 more	53 min
Apr 29, 10:18 AM CDT	Areal Flood Advisory	OUN	Canadian, Cleveland, Oklahoma	117 min
Apr 29, 10:34 AM CDT	River Flood Warning	OUN	Harper, Woods, Woodward	9 hr
Apr 29, 10:34 AM CDT	River Flood Warning	OUN	Major, Woods, Woodward	28 hr
Apr 29, 10:38 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc, Seminole	67 min
Apr 29, 10:47 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal, Johnston, Marshall	58 min
Apr 29, 11:13 AM CDT	Areal Flood Advisory	OUN	Carter, Coal, Hughes, Johnston, Love, Marshall and 2 more	3 hr
Apr 29, 11:43 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	62 min
Apr 29, 11:51 AM CDT	Flash Flood Warning	OUN	Atoka, Bryan, Carter, Johnston, Love, Marshall	3 hr
Apr 29, 12:07 PM CDT	Flash Flood Watch	OUN	Atoka, Bryan, Carter, Comanche, Cotton, Jackson and 7 more	19 hr
Apr 29, 12:15 PM CDT	Areal Flood Advisory	OUN	Carter, Murray	2 hr
Apr 29, 1:07 PM CDT	Areal Flood Advisory	OUN	Jefferson	113 min
Apr 29, 1:37 PM CDT	Areal Flood Warning	OUN	Harmon, Jackson, Kiowa, Tillman	6 hr
Apr 29, 1:46 PM CDT	Areal Flood Warning	OUN	Cotton, Jefferson, Stephens	6 hr
Apr 29, 1:59 PM CDT	River Flood Warning	OUN	Oklahoma	7 hr
Apr 29, 1:59 PM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	7 hr
Apr 29, 2:19 PM CDT	Areal Flood Warning	OUN	Carter, Love, Murray	6 hr
Apr 29, 2:29 PM CDT	River Flood Warning	OUN	Cotton	3 days
Apr 29, 4:08 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	67 min
Apr 29, 4:13 PM CDT	Areal Flood Warning	OUN	Marshall	6 hr
Apr 28, 10:28 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	62 min
Apr 28, 11:29 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	61 min
Apr 29, 12:29 AM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Wilbarger	61 min
Apr 29, 1:05 AM CDT	Areal Flood Advisory	OUN	Foard, Hardeman	3 hr
Apr 29, 3:08 AM CDT	Severe Thunderstorm Warning	OUN	Hardeman, Wilbarger	52 min
Apr 29, 10:11 AM CDT	Areal Flood Advisory	OUN	Wichita	2 hr
Apr 29, 12:03 PM CDT	Flash Flood Warning	OUN	Clay, Wichita, Wilbarger	3 hr
Apr 29, 1:31 PM CDT	Severe Thunderstorm Warning	OUN	Clay	59 min
Apr 29, 2:28 PM CDT	Severe Thunderstorm Warning	OUN	Clay	47 min
Apr 29, 2:59 PM CDT	Areal Flood Warning	OUN	Archer, Clay, Wichita	6 hr
Apr 29, 4:25 PM CDT	Flash Flood Warning	OUN	Clay	3 hr

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.