

000 

WWUS20 KWNS 170504

SEL2

SPC WW 170504

TXZ000-171200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 122

NWS STORM PREDICTION CENTER NORMAN OK

1205 AM CDT MON MAR 17 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       THE TEXAS PANHANDLE AND WEST CENTRAL TEXAS



EFFECTIVE THIS MONDAY MORNING FROM 1205 AM UNTIL 700 AM 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH

NORTHWEST OF BORGER TEXAS TO 45 MILES SOUTH SOUTHEAST OF LUBBOCK

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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/POSSIBLE SUPERCELLS EXPECTED TO INCREASE IN

COVERAGE LATER THIS MORNING ACROSS WRN/NW TX AS LOW-LEVEL

WARM/MOISTURE ADVECTION CONTINUE BENEATH STRONG SW FLOW AHEAD OF

AMPLIFYING SW U.S. TROUGH /REF. MCD 431/.  ACTIVITY WILL INITIALLY

BE ELEVATED/HIGH-BASED...BUT BASES SHOULD LOWER WITH TIME AS

MOISTURE SUBSTANTIALLY INCREASES...WITH A CORRESPONDING INCREASE IN

THE THREAT FOR SVR 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 450. MEAN STORM

MOTION VECTOR 21040.





...CORFIDI

