HAZARDOUS WEATHER OUTLOOK
Issue Date: 1200 PM CST MON DEC 21 2009
Expiration: 500 AM CST TUE DEC 22 2009
THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.
.DAY ONE...TODAY AND TONIGHT...
THUNDERSTORM OUTLOOK...
THUNDERSTORMS ARE NOT EXPECTED THROUGH TONIGHT.
DISCUSSION...
A MILD AND STABLE AIRMASS WILL REMAIN IN PLACE.
PROBABILITY TABLE...
VALID THROUGH 700 AM CST TUESDAY DEC 22.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA...LESS THAN 5 PERCENT.
OTHER HAZARDOUS WEATHER...
AREAS OF FOG MAY DEVELOP EARLY TUESDAY IN SOUTHERN AND CENTRAL
OKLAHOMA.
.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...
THUNDERSTORM OUTLOOK...
STRONG THUNDERSTORMS ARE POSSIBLE IN SOUTHEAST OKLAHOMA ON
WEDNESDAY. SURFACE LOW PRESSURE WILL INTENSIFY IN WESTERN NORTH
TEXAS...AND SOUTH WINDS WILL PULL GULF MOISTURE INTO SOUTHERN AND
EASTERN OKLAHOMA. THE APPROACH OF AN UPPER LEVEL STORM WILL GENERATE
STRONG LIFT AND WEAK TO MODERATE INSTABILITY OVER SOUTHEAST
OKLAHOMA. ISOLATED SEVERE WEATHER WILL BE POSSIBLE...MAINLY IN THE
FORM OF LARGE HAIL.
OTHER HAZARDOUS WEATHER...
A WINTER STORM WILL AFFECT NORTHERN AND WESTERN OKLAHOMA WEDNESDAY
NIGHT AND THURSDAY. WIND CHILL TEMPERATURES WILL BE QUITE LOW
THURSDAY AND FRIDAY.
FORECASTS HAVE NARROWED TOWARD A MORE CONFIDENT SOLUTION REGARDING
THE TRACK OF AN IMPENDING STORM SYSTEM. FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...LOW PRESSURE WILL STRENGTHEN AS IT TRACKS
FROM WESTERN NORTH TEXAS UP THROUGH SOUTHERN AND EASTERN OKLAHOMA.
RAIN WILL TURN TO SNOW AS COLD AIR RUSHES IN FROM THE NORTH AND
WEST. THIS STORM IS LIKELY TO RESULT IN ACCUMULATING SNOWFALL OVER
PARTS OF NORTHERN AND WESTERN OKLAHOMA LATE WEDNESDAY NIGHT AND
THURSDAY. A SECOND AREA OF ACCUMULATION IS POSSIBLE IN A ZONE FROM
QUANNAH TEXAS TOWARDS LAWTON. DURING THE STORM...TEMPERATURES WILL
FALL SIGNIFICANTLY...AND WINDS WILL BECOME INCREASINGLY BLUSTERY.
THE AMOUNT OF SNOW AND BLOWING SNOW WILL BE STRONGLY AFFECTED BY HOW
QUICKLY COLD AIR ARRIVES...AND THE FORWARD SPEED OF THE STORM.
WHEN THE STORM EXITS A LARGE MASS OF ARCTIC AIR WILL OVERSPREAD THE
SOUTHERN PLAINS. WIND CHILL TEMPERATURES WILL BE QUITE LOW AND AIR
TEMPERATURES WILL REMAIN NEAR OR BELOW FREEZING FOR SEVERAL DAYS
BEGINNING THURSDAY.
THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 7 AM
TUESDAY.
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