HAZARDOUS WEATHER OUTLOOK
Issue Date: 1145 AM CST WED DEC 23 2009
Expiration: 500 AM CST THU DEC 24 2009
THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.
.DAY ONE...THROUGH TONIGHT...
THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF CENTRAL
AND SOUTHEAST OKLAHOMA THIS AFTERNOON AND EVENING. THE SLIGHT RISK
IS GENERALLY EAST OF AN ARDMORE TO CHANDLER LINE. LARGE HAIL AND
DAMAGING WINDS WILL BE THE MAIN THREATS...ALTHOUGH AN ISOLATED
TORNADO CAN NOT BE RULED OUT.
DISCUSSION...
AN UNSEASONABLY MILD AND INCREASINGLY MOIST AIRMASS WILL REMAIN IN
PLACE AHEAD OF A COLD FRONT...WHICH WAS LOCATED FROM NEAR CHANDLER
TO PAULS VALLEY TO HENRIETTA TEXAS. SCATTERED THUNDERSTORMS ARE
EXPECTED TO DEVELOP NEAR THE FRONT AS IT BEGINS TO ACCELERATE
SOUTHEASTWARD THIS AFTERNOON. WEAK TO MODERATE INSTABILITY COMBINED
WITH STRENGTHENING WIND SHEAR PROFILES WILL BE FAVORABLE FOR THE
DEVELOPMENT OF SEVERE STORMS...INCLUDING SUPERCELLS. LARGE HAIL AND
DAMAGING WINDS WILL BE THE MAIN THREATS...ALTHOUGH AN ISOLATED
TORNADO CAN NOT BE RULED OUT IN SOUTH CENTRAL AND SOUTHEAST
OKLAHOMA. THE THREAT FOR SEVERE STORMS WILL CONTINUE INTO THE
EVENING HOURS UNTIL THE FRONT CLEARS THE AREA.
PROBABILITY TABLE...
VALID THROUGH 700 AM CST THURSDAY DEC 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...40 PERCENT.
OTHER HAZARDOUS WEATHER...
WINTER WEATHER IS EXPECTED TO DEVELOP LATE TONIGHT AND CONTINUE
THROUGH THURSDAY AS THE STRONG UPPER LEVEL STORM SYSTEM MOVES FROM
WEST TEXAS INTO MISSOURI. A WINTER STORM WATCH IS IN EFFECT FOR
PARTS OF NORTH CENTRAL AND CENTRAL OKLAHOMA AND A WINTER WEATHER
ADVISORY IS IN EFFECT FOR MUCH OF WESTERN OKLAHOMA TONIGHT AND
THURSDAY.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...
THUNDERSTORM OUTLOOK...
NO THUNDERSTORMS ARE EXPECTED.
OTHER HAZARDOUS WEATHER...
SNOW... COLD TEMPERATURES... STRONG WINDS AND LOW WIND CHILL
READINGS WILL PREVAIL AREA-WIDE ON THURSDAY. ACCUMULATING SNOW WILL
BE LIKELY ACROSS A GOOD PORTION OF OKLAHOMA AND WESTERN NORTH TEXAS.
STRONG NORTH WINDS WILL RESULT IN BLOWING SNOW... RESTRICTED
VISIBILITIES AND DRIFTING OF THE SNOW. COLD TEMPERATURES WILL
CONTINUE INTO THE EARLY PART OF NEXT WEEK.
THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM
THURSDAY.
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