URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 79
NWS STORM PREDICTION CENTER NORMAN OK
350 PM CDT FRI MAR 16 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN OKLAHOMA
THE TEXAS SOUTH PLAINS AND EASTERN TEXAS PANHANDLE
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 350 PM UNTIL 900
PM CDT.
HAIL TO 2.5 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 65
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES EAST
NORTHEAST OF GAGE OKLAHOMA TO 55 MILES SOUTH SOUTHEAST OF LUBBOCK
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.
OTHER WATCH INFORMATION...CONTINUE...WW 78...
DISCUSSION...DEEPENING CUMULUS DEVELOPMENT HAS BEEN NOTED IN RECENT
VISIBLE SATELLITE IMAGERY ALONG THE DRYLINE FROM JUST SW OF LBB TO
JUST NE OF PAMPA. CONTINUED DAYTIME HEATING WILL FURTHER WEAKEN
CONVECTIVE INHIBITION...AND A WEAK LARGE SCALE ASCENT WILL HELP
CONDITION THE ENVIRONMENT FOR MORE STORM DEVELOPMENT AS A WEAK
MIDLEVEL TROUGH MOVES NEWD FROM ERN NM. VERTICAL SHEAR IS ONLY
MARGINALLY FAVORABLE FOR SPLITTING SUPERCELLS...BUT STRONG
INSTABILITY WILL SUPPORT A RISK FOR LARGE HAIL WITH ANY SUSTAINED
STORMS. LATER THIS EVENING...STORMS COULD COALESCE INTO A CLUSTER
OR TWO ACROSS NW TX AND SW OK...WITH AN ATTENDANT RISK FOR LARGE
HAIL AND DAMAGING WINDS.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 27020.
...THOMPSON
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