Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 101, NWS Norman, OK

April 24, 2006Alfalfa County, Garfield County, Grant County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 24, 2006, 1:43 AM CDT for Alfalfa County, Garfield County, Grant County, Oklahoma. It was in force for 47 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 24, 2006, 1:43 AM CDT (06:43 UTC)
Expired: Apr 24, 2006, 2:30 AM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

Counties Alfalfa County, OK, Garfield County, OK, Grant County, OK

The radar

The Vance AFB radar (KVNX), 19 km from the middle of the area, began a volume at 06:47 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 nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 6.7 hours before the alert went out and 43 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2939 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1903 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 5.4

Open this sounding in Storm Lab

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 23, 9:00 PM CDT, 4 hours 43 minutes earlier.

Area forecast discussion, Apr 23, 9:00 PM CDT, 4 hours 43 minutes before

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Hazardous weather outlook, Apr 23, 11:58 AM CDT, 13 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1158 AM CDT SUN APR 23 2006

OKZ004>048-050>052-TXZ083>090-241200-
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-
1158 AM CDT SUN APR 23 2006

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 LATE TODAY AND
TONIGHT ACROSS WESTERN AND NORTHERN OKLAHOMA AND FAR WESTERN NORTH
TEXAS.

LOCATION...
IN TEXAS...THE SLIGHT RISK AREA IS WEST OF A LINE FROM VERNON TO
SEYMOUR. IN OKLAHOMA...THE SLIGHT RISK AREA IS NORTH AND WEST OF A
LINE FROM STILLWATER TO KINGFISHER TO FREDERICK.

TIMING...
THE MOST LIKELY TIME FOR SEVERE STORMS IN WESTERN OKLAHOMA AND
WESTERN NORTH TEXAS WILL BE FROM 5 PM TO 2 AM.

IMPACTS...
LARGE HAIL TO THE SIZE OF GOLFBALLS AND DAMAGING STRAIGHT LINE
WINDS. AN ISOLATED TORNADO IS POSSIBLE...ESPECIALLY WITH ISOLATED
STORMS EARLY THIS EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREAS NEED TO BE PREPARED FOR POSSIBLE SEVERE WEATHER
OPERATIONS THIS EVENING AND TONIGHT.

DISCUSSION...
THIS AFTERNOON A BROAD AREA OF SURFACE MOISTURE...WITH DEWPOINTS IN
THE 60S...WILL RESULT IN MODERATE INSTABILITY OVER MUCH OF WEST
TEXAS AND FAR WESTERN OKLAHOMA. A STRONG CAP WILL REMAIN IN
PLACE...BUT SEVERAL FEATURES WILL HELP TO INITIATE THUNDERSTORMS.
A STRENGTHENING DRYLINE...LIFT ALONG TERRAIN FEATURES...AND AN UPPER
LEVEL DISTURBANCE APPROACHING FROM THE SOUTHWEST...WILL CONTRIBUTE
TO ISOLATED OR SCATTERED THUNDERSTORM DEVELOPMENT BY LATE AFTERNOON
AND EARLY EVENING. WIND SHEAR WILL BE FAVORABLE FOR A FEW SUPERCELLS
ALONG WITH ORGANIZED MULTICELLS...WITH A RISK FOR LARGE HAIL AND
DAMAGING WINDS. ONE OR TWO TORNADOES WILL BE POSSIBLE WITH ANY
SUSTAINED SUPERCELLS...MAINLY EARLY IN THE EVENING IN FAR WESTERN
OKLAHOMA AND FAR WESTERN NORTH TEXAS. WITH MOVEMENT TO THE EAST AND
NORTHEAST...STORMS MAY REACH THE OUTSKIRTS OF CENTRAL AND NORTHERN
OKLAHOMA BEFORE DISSIPATING OVERNIGHT.

MORE WIDESPREAD THUNDERSTORMS WILL LIKELY OCCUR ALONG A WARM FRONT
IN CENTRAL KANSAS OVERNIGHT. THESE STORMS WILL ORGANIZE INTO A
COMPLEX THAT WILL MOVE TOWARD NORTHERN OKLAHOMA. ALTHOUGH MOST OF
THE ACTIVITY MAY REMAIN EAST OF INTERSTATE 35...A DEVELOPING LOW
LEVEL JET WILL INCREASE THE CHANCE FOR THIS COMPLEX OF STORMS TO
BUILD INTO NORTH CENTRAL OKLAHOMA TO THE WEST OF THE INTERSTATE.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY APR 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...35 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...60 PERCENT.

OTHER HAZARDOUS WEATHER...
HIGH FIRE DANGER WILL REMAIN IN PLACE TODAY AS TEMPERATURES WARM
INTO THE 80S TO NEAR 90... WITH BREEZY SOUTHERLY WINDS. HOWEVER...
HUMIDITIES WILL REMAIN ABOVE 30 PERCENT... MAKING IT DIFFICULT FOR
FIRES TO START...BUT CONDITIONS WILL BE FAVORABLE FOR THE SPREAD OF
FIRES IF THEY DO START.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
THERE MAY BE A FEW LINGERING THUNDERSTORMS IN PARTS OF NORTHERN AND
CENTRAL OKLAHOMA MONDAY MORNING.

ANOTHER ROUND OF STORMS WILL BE POSSIBLE MONDAY AFTERNOON AND NIGHT.
A STRONG COLD FRONT WILL DROP SOUTH FROM KANSAS...AND AN UPPER LEVEL
DISTURBANCE WILL MOVE OUT OF THE SOUTHERN ROCKIES...INTERACTING WITH
AN INCREASINGLY MOIST AND UNSTABLE AIRMASS OVER THE SOUTHERN PLAINS.
A DRY LINE WILL ALSO MOVE EASTWARD AHEAD OF THE FRONT ACROSS PARTS
OF SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS. INSTABILITY AND WIND
SHEAR WILL BE SUFFICIENT FOR SOME OF THE STORMS TO BECOME SEVERE
ACROSS PARTS OF CENTRAL AND SOUTHERN OKLAHOMA AND WESTERN NORTH
TEXAS. VERY LARGE HAIL AND STRONG WIND GUSTS WILL BE THE MAIN
CONCERN WITH THESE STORMS. TORNADOES WILL BE POSSIBLE... ESPECIALLY
IF DISCRETE ISOLATED SUPERCELLS ARE ABLE TO DEVELOP...MAINLY IN
SOUTH CENTRAL AND SOUTHEAST OKLAHOMA.

ANOTHER UPPER LEVEL DISTURBANCE WILL BRING A CHANCE OF RAIN AND
THUNDERSTORMS AGAIN FRIDAY AND SATURDAY.

OTHER HAZARDOUS WEATHER...
TEMPERATURES WILL WARM INTO THE 80S AND 90S AHEAD OF THE COLD FRONT
MONDAY. THE DRY LINE WILL ALSO BRING AN AREA OF LOW RELATIVE
HUMIDITIES. THE WARM TEMPERATURES AND LOWER HUMIDITIES ALONG WITH A
SHARP WIND SHIFT WILL RESULT IN VERY HIGH TO POSSIBLY EXTREME FIRE
DANGER IN PARTS OF SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS MONDAY
AFTERNOON. PLEASE REFER TO THE FIRE WEATHER WATCH FOR FURTHER
DETAILS.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT
7 AM MONDAY.

BURKE/02

In the hours before

Special weather statement, Apr 23, 10:18 PM CDT, 3 hours 25 minutes before

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Special weather statement, Apr 23, 11:22 PM CDT, 2 hours 21 minutes before

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Special weather statement, Apr 24, 12:19 AM CDT, 1 hour 24 minutes before

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Special weather statement, Apr 24, 12:32 AM CDT, 1 hour 11 minutes before

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Special weather statement, Apr 24, 12:47 AM CDT, 56 minutes before

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Local storm report, Apr 24, 1:04 AM CDT, 39 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 23, 7:12 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	48 min
Apr 23, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Woodward	48 min
Apr 23, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Woodward	48 min
Apr 23, 10:25 PM CDT	Severe Thunderstorm Warning	OUN	Kay	35 min
Apr 23, 11:32 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	43 min
Apr 24, 12:58 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	47 min
Apr 24, 2:29 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	46 min
Apr 24, 3:01 AM CDT	Severe Thunderstorm Warning	OUN	Kay	25 min
Apr 24, 4:30 AM CDT	Red Flag Warning	OUN	Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more	18 hr
Apr 24, 6:27 AM CDT	Severe Thunderstorm Warning	OUN	Grant	48 min
Apr 24, 7:11 AM CDT	Severe Thunderstorm Warning	OUN	Grant	49 min
Apr 24, 7:27 AM CDT	Severe Thunderstorm Warning	OUN	Kay	48 min
Apr 24, 8:12 AM CDT	Severe Thunderstorm Warning	OUN	Kay	63 min
Apr 24, 9:20 AM CDT	Severe Thunderstorm Warning	OUN	Payne	55 min
Apr 24, 3:16 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher	59 min
Apr 24, 3:30 PM CDT	Severe Thunderstorm Warning	OUN	Grant	60 min
Apr 24, 4:03 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	42 min
Apr 24, 4:07 PM CDT	Severe Thunderstorm Warning	OUN	Logan	38 min
Apr 24, 4:09 PM CDT	Severe Thunderstorm Warning	OUN	Noble	66 min
Apr 24, 4:11 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	34 min
Apr 24, 4:19 PM CDT	Severe Thunderstorm Warning	OUN	Payne	56 min
Apr 24, 4:23 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	67 min
Apr 24, 5:08 PM CDT	Severe Thunderstorm Warning	OUN	Noble	52 min
Apr 24, 5:12 PM CDT	Severe Thunderstorm Warning	OUN	Payne	48 min
Apr 24, 5:26 PM CDT	Severe Thunderstorm Warning	OUN	Kay	64 min
Apr 24, 5:39 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa	51 min
Apr 24, 5:42 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	48 min
Apr 24, 5:56 PM CDT	Severe Thunderstorm Warning	OUN	Payne	34 min
Apr 24, 6:01 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	59 min
Apr 24, 6:23 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	52 min
Apr 24, 6:27 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	48 min
Apr 24, 6:41 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	64 min
Apr 24, 6:50 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	55 min
Apr 24, 6:54 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	51 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2006 Every severe thunderstorm warning in 2006

Sources

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