Hazardous Weather Outlook, National Weather Service, Norman

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

.DAY ONE…THIS AFTERNOON AND TONIGHT…

THUNDERSTORM OUTLOOK…
NUMEROUS THUNDERSTORMS WILL CONTINUE THROUGH EVENING. HEAVY RAIN IS
A DISTINCT THREAT…WHILE THE CHANCE OF SEVERE HAIL AND WIND IS LOW.

DISCUSSION…
THIS AFTERNOON A HUMID AND UNSTABLE AIR MASS WAS IN PLACE THROUGHOUT
OKLAHOMA AND WESTERN NORTH TEXAS. THUNDERSTORMS WILL BE ISOLATED IN
CENTRAL AND EASTERN OKLAHOMA…WHERE LIFTING IS WEAK…BUT MODERATE
INSTABILITY WILL SUPPORT HEAVY DOWNPOURS OF RAIN…SMALL HAIL…AND
LOCALLY STRONG WIND GUSTS. ELSEWHERE…AN UPPER LEVEL TROUGH WILL
MOVE INTO WESTERN NORTH TEXAS AND WESTERN OKLAHOMA. THIS SLOW MOVING
UPPER TROUGH WILL PROVIDE VERY LITTLE WIND SHEAR…BUT WILL PROVIDE
ENOUGH LIFT TO GENERATE NUMEROUS THUNDERSTORMS THIS AFTERNOON AND
EVENING. THE STORMS…WHICH WERE IN PROGRESS BY MID AFTERNOON…WILL
MOVE SLOWLY EAST…POSSIBLY REACHING THE INTERSTATE 35 CORRIDOR BY
MID TO LATE EVENING. SLOW STORM MOTIONS…MODERATE INSTABILITY…AND
ABUNDANT MOISTURE…WILL RESULT IN A DISTINCT THREAT OF HEAVY RAIN
AND FLOODING WITH ANY THUNDERSTORM OCCURRING THROUGH THIS EVENING.
IN ADDITION…SOME SMALL HAIL AND LOCALLY STRONG WIND GUSTS ARE
LIKELY. SEVERE HAIL AND ISOLATED DAMAGING WIND GUSTS WILL BE
POSSIBLE.

THE COVERAGE OF THUNDERSTORMS WILL DECREASE AFTER SUNSET…AS
SURFACE BASED INSTABILITY DIMINISHES.

PROBABILITY TABLE…
VALID THROUGH 700 AM CDT THURSDAY MAY 27.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA…100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR…30 PERCENT.

OTHER HAZARDOUS WEATHER…
NONE.

.DAYS TWO THROUGH SEVEN…THURSDAY THROUGH TUESDAY…

THUNDERSTORM OUTLOOK…
ALTHOUGH AN UPPER LEVEL RIDGE WILL BUILD OVER THE REGION…THE
PRESENCE OF HUMID AIR AND WEAK SURFACE BOUNDARIES MAY SUPPORT
ISOLATED THUNDERSTORMS ANY OF THE NEXT FEW DAYS. RAIN CHANCES WILL
ATTAIN GREATER FOCUS ACROSS NORTHERN OKLAHOMA ON SUNDAY…AS A COLD
FRONT ARRIVES. LOCALLY HEAVY RAIN AND ISOLATED SEVERE WEATHER MAY
OCCUR ALONG THE FRONT FROM SUNDAY INTO MONDAY.

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