Alert archive / Texas / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 583, NWS Norman, OK

December 29, 2006Archer County, Wichita County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Dec 29, 2006, 3:52 PM CST for Archer County, Wichita County, Texas. It was in force for 28 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: Dec 29, 2006, 3:52 PM CST (21:52 UTC)
Expired: Dec 29, 2006, 4:20 PM CST
In force: 28 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

Counties Archer County, TX, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 67 km from the middle of the area, began a volume at 21:52 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
Dec 29, 1:37 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.9 hours before the alert went out and 169 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: 13 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 648 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 256 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Dec 29, 3:20 PM CST, 32 minutes earlier.

Area forecast discussion, Dec 29, 3:20 PM CST, 32 minutes before

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Hazardous weather outlook, Dec 29, 2:15 PM CST, 1 hour 37 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
215 PM CST FRI DEC 29 2006

OKZ004>048-050>052-TXZ083>090-301300-
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-
215 PM CST FRI DEC 29 2006

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

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING ACROSS SOUTHERN OKLAHOMA AND PORTIONS OF WESTERN NORTH
TEXAS.

LOCATION...
THE SLIGHT RISK IS SOUTH OF A LINE FROM KNOX CITY TEXAS... TO
CROWELL... TO ALTUS OKLAHOMA... TO LAWTON... TO ADA... TO ATOKA
OKLAHOMA.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM THIS
AFTERNOON THROUGH LATE THIS EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
SLIGHT RISK AREA SHOULD PLAN FOR THE POSSIBILITY OF SEVERE WEATHER
OPERATIONS FROM THIS AFTERNOON UNTIL LATE THIS EVENING.

DISCUSSION...
A STRONG UPPER LEVEL STORM SYSTEM WILL APPROACH OKLAHOMA AND WESTERN
NORTH TEXAS THIS AFTERNOON AND TONIGHT. THIS WILL LEAD TO WIDESPREAD
RAIN AND THUNDERSTORMS DEVELOPING ACROSS THE AREA DURING THE DAY
TODAY AND CONTINUING THROUGH TONIGHT.

THE ASSOCIATED CLOUD COVER AND PRECIPITATION IS EXPECTED TO LIMIT
INSTABILITY ACROSS MUCH OF OKLAHOMA AND NORTH TEXAS. HOWEVER...
STRONG SOUTH AND SOUTHEASTERLY LOW LEVEL FLOW WILL CONTINUE TO BRING
ABUNDANT LOW LEVEL MOISTURE NORTHWARD ACROSS TEXAS INTO OKLAHOMA.
THIS MOISTURE ALONG WITH COOLING TEMPERATURES ALOFT ASSOCIATED WITH
THE APPROACHING UPPER LEVEL STORM SYSTEM... MAY RESULT IN MODEST
INSTABILITY DEVELOPING THIS AFTERNOON... ESPECIALLY ACROSS SOUTHERN
OKLAHOMA AND PORTIONS OF WESTERN NORTH TEXAS. THIS INSTABILITY...
ALONG WITH STRONG WIND SHEAR... WILL SUPPORT THE DEVELOPMENT OF
THUNDERSTORMS... A FEW OF WHICH MAY BE CAPABLE OF PRODUCING
TORNADOES... MARGINALLY SEVERE HAIL... AND STRONG WINDS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CST SATURDAY DEC 30.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...50 PERCENT.

OTHER HAZARDOUS WEATHER...
WITH THE SLOW MOVEMENT OF THE STORM SYSTEM... A THREAT FOR HEAVY
RAIN AND LOCALIZED FLOODING WILL ALSO EXIST... AS STORMS MAY TRAIN
FROM SOUTH TO NORTH AND REFORM OVER THE SAME AREAS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THUNDERSTORM OUTLOOK...
NONE.

OTHER HAZARDOUS WEATHER...
RAIN MAY CHANGE TO LIGHT SNOW SATURDAY ACROSS NORTHERN AND CENTRAL
OKLAHOMA... BEFORE ENDING LATE SUNDAY. WITH THE CURRENT FORECAST
STORM TRACK...THERE IS A CHANCE FOR ACCUMULATING SNOW IN NORTHWEST
OKLAHOMA THIS WEEKEND. IF THE STORM TRACK SHIFTS FARTHER SOUTH...
THE POTENTIAL FOR ACCUMULATING SNOW WILL EXPAND INTO WEST CENTRAL
AND NORTH CENTRAL OKLAHOMA.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 700
AM CST SATURDAY DECEMBER 30TH.

SIX/CMS

In the hours before

Special weather statement, Dec 29, 2:22 PM CST, 1 hour 30 minutes before

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Special weather statement, Dec 29, 2:57 PM CST, 55 minutes before

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Special weather statement, Dec 29, 3:38 PM CST, 14 minutes before

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Nearby

Severe Thunderstorm Warnings in Texas, 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.