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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 79

NWS STORM PREDICTION CENTER NORMAN OK

235 PM CDT TUE APR 2 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN AND CENTRAL TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

1100 PM CDT.



HAIL TO 3 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 185

STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES EAST

NORTHEAST OF SAN ANGELO TEXAS TO 5 MILES EAST OF DEL RIO TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...TSTMS EXPECTED TO INCREASE IN SEVERAL PARTS OF WW AREA

THROUGH THIS EVE: /1/ ALONG LEE TROUGH/DRY LINE NEAR THE DAVIS

MOUNTAINS AS MID-LVL COOLING ASCENT WITH NRN MEXICO/CHIHUAHUA UPR

IMPULSE AND SFC HEATING FURTHER DESTABILIZE REGION OF MOIST UPSLOPE

FLOW.../2/ ALONG AND N OF W-E COLD FRONT ADVANCING SLOWLY S THROUGH

THE SRN EDWARDS PLATEAU/HILL COUNTRY...AND /3/ ALONG WEAK NW/SE WARM

FRONT/DIFFERENTIAL HEATING BOUNDARY OVER THE ERN HILL COUNTRY INTO

THE WRN PORTIONS OF THE MIDDLE TX CSTL PLN.

MODERATE /25-35 KT/ WLY DEEP SHEAR AND SUSTAINED...SEASONABLY MOIST

LOW-LVL INFLOW SUGGEST GOOD POTENTIAL FOR A FEW SUPERCELLS WITH

LARGE HAIL/LOCALLY DMGG WIND. THIS ACTIVITY SHOULD MERGE INTO ONE OR

TWO SIZABLE MCSS BY MID EVE. A TORNADO OR TWO ALSO CANNOT BE RULED

OUT LATER THIS AFTN...BOTH IN THE BIG BEND REGION WHERE LOW-LVL

LAPSE RATES WILL BE MAXIMIZED UNDER PARTLY CLEAR SKIES...AND IN ERN

QUARTER OF WW...INVOF DIFFUSE WARM FRONT. ENVIRONMENT AND STORM

CHARACTER IN THESE AREAS WILL BE MONITORED FOR POSSIBLE WATCH

UPGRADES.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 29025.





...CORFIDI

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