HAZARDOUS WEATHER OUTLOOK
Issue Date: 1145 AM CST TUE DEC 22 2009
Expiration: 500 AM CST WED DEC 23 2009
THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.
.DAY ONE...THROUGH TONIGHT...
THUNDERSTORM OUTLOOK...
THUNDERSTORMS ARE POSSIBLE IN SOUTHEAST OKLAHOMA...MAINLY OVERNIGHT.
SEVERE THUNDERSTORMS ARE NOT EXPECTED.
DISCUSSION...
SURFACE LOW PRESSURE WILL INTENSIFY IN WEST TEXAS AND SOUTH WINDS
WILL PULL GULF MOISTURE NORTHWARD INTO SOUTHERN AND EASTERN OKLAHOMA
THROUGH TONIGHT. A STRENGTHENING LOW LEVEL JET MAY AID IN THE
DEVELOPMENT OF A FEW THUNDERSTORMS IN SOUTHEAST OKLAHOMA WHERE LOW
LEVEL MOISTURE WILL BE THE DEEPEST. HOWEVER...INSTABILITY WILL
REMAIN LIMITED AND SEVERE THUNDERSTORMS ARE NOT EXPECTED.
PROBABILITY TABLE...
VALID THROUGH 700 AM CST WEDNESDAY DEC 23.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA...50 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...10 PERCENT.
OTHER HAZARDOUS WEATHER...
NONE.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...
THUNDERSTORM OUTLOOK...
STRONG THUNDERSTORMS WILL BE POSSIBLE OVER PARTS OF CENTRAL AND
SOUTHEAST OKLAHOMA WEDNESDAY. MOISTURE AND INSTABILITY WILL CONTINUE
TO INCREASE AS SOUTHERLY WINDS PREVAIL TO THE EAST OF A COLD FRONT
ACROSS NORTHWEST OKLAHOMA. WIND SHEAR WILL ALSO INCREASE AS THE
UPPER LEVEL STORM SYSTEM NEARS THE AREA. THE INCREASING INSTABILITY
AND SHEAR WILL BE FAVORABLE FOR A FEW SEVERE THUNDERSTORMS OVER
PARTS OF SOUTHEAST OKLAHOMA. THE MAIN THREAT WILL BE LARGE HAIL.
OTHER HAZARDOUS WEATHER...
A WINTER STORM WILL AFFECT THE SOUTHERN PLAINS FROM LATE TUESDAY
THROUGH AT LEAST THURSDAY. RAIN COULD CHANGE TO SNOW WEDNESDAY NIGHT
INTO THURSDAY... RESULTING IN HAZARDOUS TRAVEL CONDITIONS. SOME SNOW
ACCUMULATIONS WILL BE POSSIBLE...MAINLY OVER NORTHERN OKLAHOMA.
HOWEVER...ALL AREAS WILL BE IMPACTED BY THE COMBINATION OF COLD
TEMPERATURES AND STRONG NORTHERLY WINDS... WHICH WILL RESULT IN LOW
WIND CHILL VALUES. IN AREAS THAT DO SEE SNOW ACCUMULATIONS...THE
STRONG WINDS WILL LIKELY RESULT IN AREAS OF BLOWING SNOW AND LOWER
VISIBILITY.
AS THE STORM EXITS... A LARGE MASS OF ARCTIC AIR WILL OVERSPREAD THE
SOUTHERN PLAINS. THE COLD AIRMASS COMBINED WITH STRONG WINDS WILL
RESULT IN DANGEROUSLY LOW WIND CHILL TEMPERATURES BOTH THURSDAY AND
FRIDAY.
THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM
WEDNESDAY.
SPECIAL WEATHER STATEMENT
Issue Date: 624 AM CST TUE DEC 22 2009
Expiration: 300 PM CST TUE DEC 22 2009
...LATE WEEK STORM WILL BRING STRONG WINDS...VERY COLD AIR...AND
SOME SNOW...
HAZARDOUS WINTER WEATHER MAY DEVELOP OVER THE SOUTHERN PLAINS
BEGINNING WEDNESDAY NIGHT...AS A STORM SYSTEM INTENSIFIES AND TRACKS
FROM THE SOUTHERN ROCKIES EASTWARD ACROSS THE PLAINS. STRONG
NORTHERLY WINDS AND MUCH COLDER AIR WILL RESULT IN A COLD AND
BLUSTERY CHRISTMAS EVE WITH WIND CHILL TEMPERATURES IN THE TEENS AND
20S. ALTHOUGH WIND SPEEDS WILL DECREASE ON CHRISTMAS DAY...IT WILL
STILL BE A COLD...WITH HIGHS ONLY IN THE 30S.
THE STORM WILL BEGIN TO TAKE SHAPE TONIGHT...WHEN COLDER AIR GATHERS
OVER NORTHWESTERN OKLAHOMA. ON WEDNESDAY...A COLD FRONT WILL WILL
SPREAD TOWARD THE SOUTHEAST...SLOWLY AT FIRST...BUT MORE RAPIDLY BY
EVENING. FREEZING TEMPERATURES WILL REACH CENTRAL AND SOUTHWEST
OKLAHOMA...AND WESTERN NORTH TEXAS...BY THURSDAY MORNING.
FREEZING DRIZZLE MAY DEVELOP OVER PARTS OF WESTERN OKLAHOMA
WEDNESDAY NIGHT AND EARLY THURSDAY...AND ROADS COULD BECOME SLICK
AND HAZARDOUS. AN UPPER LOW ARRIVING ON THURSDAY WILL CAUSE RAIN AND
DRIZZLE TO CHANGE TO MIX WITH OR CHANGE TO SNOW OVER NORTHERN AND
MUCH OF CENTRAL OKLAHOMA.
THE LATE ARRIVAL OF COLD AIR AND THE PROGRESSIVE NATURE OF THE UPPER
LOW WILL LIMIT SNOWFALL TOTALS. STILL...IT DOES APPEAR THAT 1 TO 3
INCHES OF SNOW MAY ACCUMULATE IN NORTHERN OKLAHOMA...ESPECIALLY
AROUND ENID AND PONCA CITY EARLY THURSDAY. SOME LIGHT SNOW
ACCUMULATION MAY EXTEND AS FAR SOUTH AND WEST AS OKLAHOMA CITY...
CLINTON...AND WOODWARD. INCREASINGLY BLUSTERY WINDS WILL RESULT IN
BLOWING SNOW AND REDUCED VISIBILITY.
HAZARDOUS WINTER WEATHER WILL PERSIST EVEN AFTER THE PRECIPITATION
ENDS. A LARGE MASS OF ARCTIC AIR...THE COLDEST YET THIS
SEASON...WILL OVERSPREAD ALL OF OKLAHOMA AND WESTERN NORTH TEXAS.
WIND CHILL TEMPERATURES MAY BECOME DANGEROUSLY LOW...ESPECIALLY
THURSDAY NIGHT AND FRIDAY. AIR TEMPERATURES ACROSS NORTHERN OKLAHOMA
COULD REMAIN NEAR OR BELOW FREEZING FOR AS LONG AS THREE OR FOUR
DAYS.
|
|
|
