

701 

WWUS20 KWNS 090208

SEL8

SPC WW 090208

OKZ000-TXZ000-090900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 48

NWS STORM PREDICTION CENTER NORMAN OK

905 PM CDT FRI MAR 8 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR WESTERN OKLAHOMA

       TEXAS PANHANDLE AND SOUTH PLAINS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 905 PM

UNTIL 400 AM CDT.



HAIL TO 1.5 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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES SOUTH

SOUTHEAST OF LUBBOCK TEXAS TO 50 MILES NORTH NORTHWEST OF GAGE

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...BANDS OF TSTMS ARE LIKELY TO CONTINUE TO INCREASE AND

STEADILY SPREAD EAST-NORTHEASTWARD ACROSS THE TX PANHANDLE/TX SOUTH

PLAINS AND INTO WESTERN OK THROUGH THE LATE EVENING AND OVERNIGHT

HOURS. THIS DEVELOPMENT IS TIED TO INCREASING FORCING

ASCENT/VERTICAL SHEAR UNDER THE INITIAL INFLUENCE OF A SOUTHWEST

STATES UPPER TROUGH. WHILE VERTICAL SHEAR WILL BE STRONG...THE

THERMODYNAMIC ENVIRONMENT WILL REMAIN MARGINAL WITH MLCAPE OF ONLY A

FEW HUNDRED J/KG. EVEN SO...AT LEAST A MARGINAL THREAT FOR SEVERE

HAIL/WIND GUSTS WILL EXIST.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 24050.





...GUYER



715 

WWUS20 KWNS 090208

SEL8

SPC WW 090208

OKZ000-TXZ000-090900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 48

NWS STORM PREDICTION CENTER NORMAN OK

905 PM CDT FRI MAR 8 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR WESTERN OKLAHOMA

       TEXAS PANHANDLE AND SOUTH PLAINS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 905 PM

UNTIL 400 AM CDT.



HAIL TO 1.5 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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES SOUTH

SOUTHEAST OF LUBBOCK TEXAS TO 50 MILES NORTH NORTHWEST OF GAGE

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...BANDS OF TSTMS ARE LIKELY TO CONTINUE TO INCREASE AND

STEADILY SPREAD EAST-NORTHEASTWARD ACROSS THE TX PANHANDLE/TX SOUTH

PLAINS AND INTO WESTERN OK THROUGH THE LATE EVENING AND OVERNIGHT

HOURS. THIS DEVELOPMENT IS TIED TO INCREASING FORCING

ASCENT/VERTICAL SHEAR UNDER THE INITIAL INFLUENCE OF A SOUTHWEST

STATES UPPER TROUGH. WHILE VERTICAL SHEAR WILL BE STRONG...THE

THERMODYNAMIC ENVIRONMENT WILL REMAIN MARGINAL WITH MLCAPE OF ONLY A

FEW HUNDRED J/KG. EVEN SO...AT LEAST A MARGINAL THREAT FOR SEVERE

HAIL/WIND GUSTS WILL EXIST.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 24050.





...GUYER

