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388 

WWUS20 KWNS 242022

SEL4

SPC WW 242022

TXZ000-250300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 34

NWS STORM PREDICTION CENTER NORMAN OK

320 PM CDT WED MAR 24 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PART OF WEST CENTRAL  AND NORTH CENTRAL TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 320 PM UNTIL

1000 PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES SOUTH

SOUTHWEST OF SAN ANGELO TEXAS TO 65 MILES EAST NORTHEAST OF

DALLAS TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



DISCUSSION...STORMS ARE DEVELOPING ALONG AND AHEAD OF THE COLD FRONT

MOVING EWD ACROSS NWRN TX.  AIR MASS HAS SUFFICIENTLY DESTABILIZED

WITH HEATING TO SUPPORT STRONG UPDRAFTS. WITH THE 40-50KT OF DEEP

LAYER SHEAR AND STEEP MID LEVEL LAPSE RATES A FEW OF THE STORMS ARE

EXPECTED TO BECOME SEVERE AS THEY CONTINUE E/NE INTO THE EVENING

HOURS.  PRIMARY THREAT WILL BE LARGE HAIL...HOWEVER THERE IS THE

POSSIBILITY OF A COUPLE OF SUPERCELLS GIVEN THE IMPROVING LOW LEVEL

SHEAR LATER THIS AFTERNOON...ACCOMPANIED BY A DAMAGING WIND THREAT

AS WELL AS LARGE HAIL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 24030.





...HALES

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