

771 

WWUS20 KWNS 120249

SEL4

SPC WW 120249

COZ000-KSZ000-121000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 384

NWS STORM PREDICTION CENTER NORMAN OK

845 PM MDT THU JUN 11 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       A SMALL PART OF FAR SOUTHEAST COLORADO

       SOUTHWEST KANSAS



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 845 PM

UNTIL 400 AM MDT.



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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES SOUTH OF

LAMAR COLORADO TO 30 MILES EAST OF GARDEN CITY KANSAS.  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.



OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES

TORNADO WATCH NUMBER 380. WATCH NUMBER 380 WILL NOT BE IN EFFECT

AFTER 845 PM MDT. CONTINUE...WW 378...WW 381...WW 383...



DISCUSSION...SE CO SUPERCELLS APPEAR TO BE GRADUALLY EVOLVING INTO A

SMALL FORWARD-PROPAGATING MCS.  AREA THERMODYNAMIC/WIND DATA SUGGEST

THAT SYSTEM SHOULD MOVE MAINLY E OR ESE...WITH SATELLITE LOOP

SHOWING AN APPARENT UPR IMPULSE IN WRN CO TO MAINTAIN MODEST LARGE

SCALE ASCENT.  AMPLE LOW LVL AND DEEP SHEAR WILL BE PRESENT FOR

EMBEDDED ROTATING STORMS.  ASSOCIATED LEWPS COULD YIELD HIGH

WIND/HAIL AND POSSIBLY A TORNADO THROUGH EARLY FRI.



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 28030.





...CORFIDI

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