HAZARDOUS WEATHER OUTLOOK
Issue Date: 507 AM CST WED DEC 23 2009
Expiration: 500 AM CST THU DEC 24 2009
...INTENSE STORM SYSTEM APPROACHES POSING MULTIPLE HAZARDS...
THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.
.DAY ONE...TODAY AND TONIGHT.
TORNADO.
RISK...LIMITED.
AREA...PRIMARILY ALONG AND SOUTH OF INTERSTATE 40.
ONSET...AFTER 3 PM.
SEVERE THUNDERSTORM.
RISK...ELEVATED.
AREA...ALL EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING...INCREASING AFTER 3 PM.
FLASH FLOOD.
RISK...LIMITED.
AREA...FAR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...AFTER 6 PM.
SIGNIFICANT WINDS.
RISK...LIMITED.
AREA...NORTH AND WEST OF TULSA COUNTY.
ONSET...AFTER MIDNIGHT.
DISCUSSION...
ONGOING THUNDERSTORMS WILL CONTINUE TO SHIFT EASTWARD THROUGH
THE MORNING HOURS...WITH A LIMITED RISK OF SEVERE WEATHER.
THE SECOND ROUND OF THUNDERSTORMS IS LIKELY TO DEVELOP BY LATE
AFTERNOON AND INCREASE IN COVERAGE AND INTENSITY DURING THE
EVENING AND OVERNIGHT HOURS. INSTABILITY AND WIND SHEAR WILL
INCREASE AS THE STRONG STORM SYSTEM APPROACHES...WITH THESE
CONDITIONS SUPPORTING A RISK OF SEVERE WEATHER AREA-WIDE THROUGH
MUCH OF THE OVERNIGHT HOURS. LARGE HAIL WILL BE A POTENTIAL
IMPACT FOR ANY OF THE STRONGER STORMS. PORTIONS OF
SOUTHEAST OKLAHOMA INTO WEST CENTRAL ARKANSAS WILL BE NEARER
THE HIGHER LOW LEVEL MOISTURE...AND THIS WILL ALLOW THUNDERSTORM
UPDRAFTS TO BE BASED NEARER THE SURFACE. SHOULD STORMS IN THIS
REGION EXPERIENCE THESE MORE FAVORABLE CONDITIONS...THEN THE
POTENTIAL INCREASES FOR DAMAGING WINDS AND TORNADOES
SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
ACTIVATION OF THE REGIONAL SPOTTER NETWORK IS LIKELY BY LATE
AFTERNOON OR EARLY EVENING.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THURSDAY...WINTER WEATHER POTENTIAL...HIGH WIND POTENTIAL.
FRIDAY...WINTER WEATHER POTENTIAL...HIGH WIND POTENTIAL...DANGEROUS
WIND CHILL POTENTIAL.
SATURDAY...NO HAZARDS.
SUNDAY...NO HAZARDS.
MONDAY...WINTER WEATHER POTENTIAL.
TUESDAY...WINTER WEATHER POTENTIAL.
EXTENDED DISCUSSION...
RAIN WILL QUICKLY CHANGE TO SNOW THURSDAY MORNING FROM WEST TO EAST
ACROSS THE AREA ASSOCIATED WITH THE PASSING UPPER STORM SYSTEM.
THE CHANCES FOR ACCUMULATING SNOW HAVE INCREASED GIVEN THE EXPECTED
TRACK OF THE STORM SYSTEM...WITH A BAND OF SIGNIFICANT SNOW AMOUNTS
LIKELY. ADDITIONALLY...STRONG NORTHWESTERLY WINDS WILL DEVELOP
AS THE STORM STRENGTHENS OVER THE CENTRAL PLAINS. THIS WILL PRODUCE
AREAS OF BLOWING AND DRIFTING SNOW WHICH WILL FURTHER IMPACT
TRAVEL. ALSO...DANGEROUS WINDS CHILLS WILL DEVELOP THURSDAY NIGHT
INTO FRIDAY AS THE COLDER AIR CONTINUES TO SPILL INTO THE REGION.
THE FORECAST SNOW AMOUNTS AND LOCATION WILL CONTINUE TO BE REFINED
IN LATER FORECASTS. HOWEVER...SIGNIFICANT IMPACTS TO TRAVEL ARE
LIKELY THURSDAY INTO FRIDAY ACROSS PORTIONS OF OKLAHOMA AND POINTS
FURTHER NORTH INTO THE CENTRAL PLAINS.
DRY AND COLD WEATHER IS EXPECTED OVER THE WEEKEND...WITH THE NEXT
CHANCE OF SNOW RETURNING FOR EARLY NEXT WEEK.
EMERGENCY MANAGEMENT PLANNING STATEMENT...
WINTER WEATHER WATCHES HAVE BEEN POSTED AND SEVERE WEATHER WATCHES
ARE LIKELY LATER WEDNESDAY. REMAIN IN CONTACT WITH THE NATIONAL
WEATHER SERVICE IN TULSA TO PASS ALONG ANY WEATHER REPORTS...AND TO
STAY ABREAST OF THE LATEST WEATHER FORECASTS.
WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.
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