Hazardous weather outlook, National Weather Service, Norman
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
THU MAR 18 2010
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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-
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THU MAR 18 2010
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.
DISCUSSION…
SURFACE HIGH PRESSURE… CENTERED OVER CENTRAL OKLAHOMA…WILL MOVE
SOUTHEAST TODAY AND TONIGHT. BY FRIDAY MORNING THE HIGH WILL BE
CENTERED NEAR THE CENTRAL GULF COAST. SOUTH WINDS WILL INCREASE
TODAY AND TONIGHT OVER THE SOUTHERN PLAINS… ON THE BACK SIDE OF
THE HIGH… BUT GULF MOISTURE WILL BE LIMITED THROUGH TONIGHT AND
THEREFORE INSTABILITY WILL NOT BE SUFFICIENT TO SUPPORT
THUNDERSTORMS.
PROBABILITY TABLE…
VALID THROUGH 700 AM CDT FRIDAY MAR 19.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA… LESS THAN 10 PERCENT.
OTHER HAZARDOUS WEATHER…
NONE
.DAYS TWO THROUGH SEVEN…FRIDAY THROUGH WEDNESDAY…
THUNDERSTORM OUTLOOK…
THUNDERSTORMS WILL BECOME MORE LIKELY LATE FRIDAY AND FRIDAY NIGHT
AS A STRONG COLD FRONT MOVES THROUGH THE AREA. LOW-LEVEL GULF
MOISTURE RETURN WILL BE LIMITED… BUT DAYTIME HEATING AHEAD OF THE
FRONT WILL RESULT IN SUFFICIENT INSTABILITY FOR THUNDERSTORMS TO
FORM ALONG THE FRONT BY MID TO LATE AFTERNOON FROM NORTH CENTRAL
INTO SOUTHWESTERN OKLAHOMA. STRONG LIFT ALONG THE FRONT… AND
FAVORABLE WIND SHEAR ALOFT… WILL SUPPORT DEVELOPMENT OF A LINE OF
THUNDERSTORMS THAT WILL MOVE SOUTHEAST ACROSS WESTERN NORTH TEXAS
AND SOUTHERN… CENTRAL… AND EASTERN OKLAHOMA LATE FRIDAY
AFTERNOON INTO FRIDAY NIGHT. A FEW SEVERE THUNDERSTORMS WILL BE
POSSIBLE… WITH DAMAGING WINDS THE PRIMARY CONCERN.
THUNDERSTORMS WILL BE POSSIBLE AGAIN TUESDAY NIGHT INTO WEDNESDAY
OVER MOST OF THE AREA.
OTHER HAZARDOUS WEATHER…
MUCH COLDER WEATHER WILL ENTER THE AREA BEHIND THE COLD FRONT…
BEGINNING IN NORTHWESTERN OKLAHOMA ON FRIDAY AND THEN SPREADING
SOUTHEAST ACROSS THE ENTIRE AREA LATE FRIDAY AND FRIDAY NIGHT.
TEMPERATURES ON SATURDAY ARE LIKELY TO BE 30 DEGREES OR MORE COLDER
THAN THOSE ON FRIDAY IN MANY AREAS. STRONG NORTH WINDS WILL DROP
WIND CHILLS INTO THE TEENS AND 20S IN MOST AREAS DURING THE DAY
SATURDAY.
HAZARDOUS TRAVEL CONDITIONS WILL BE LIKELY IN PARTS OF OKLAHOMA…
FRIDAY NIGHT INTO SATURDAY DUE TO THE COMBINATION OF SNOW AND
BLOWING SNOW. AT THIS TIME… ACCUMULATING SNOW APPEARS TO BE MOST
LIKELY FRIDAY NIGHT INTO SATURDAY MORNING OVER NORTHERN OKLAHOMA…
NEAR AND NORTH OF INTERSTATE 40. ACCUMULATIONS IN EXCESS OF 4 INCHES
WILL BE POSSIBLE IN SOME AREAS.
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