

090 

WWUS20 KWNS 240744

SEL1

SPC WW 240744

COZ000-KSZ000-241500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 351

NWS STORM PREDICTION CENTER NORMAN OK

235 AM CDT TUE MAY 24 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN COLORADO

       NORTHWEST KANSAS



EFFECTIVE THIS TUESDAY MORNING FROM 235 AM UNTIL 1000 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

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 30 MILES WEST

NORTHWEST OF BURLINGTON COLORADO TO 45 MILES EAST SOUTHEAST OF

HILL CITY KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 350...



DISCUSSION...SCTD SLIGHTLY ELEVATED TSTMS EXPECTED TO INCREASE IN

COVERAGE AND POSSIBLY STRENGTH THROUGH SUNRISE IN ZONE OF

WAA/MOISTURE INFLOW BENEATH INCREASING UPR DIFFLUENCE/ASCENT IN EXIT

REGION OF JET STREAM PROGRESSING EWD ACROSS NM.  THERMODYNAMIC

ENVIRONMENT WITH SIZABLE ELEVATED CAPE MAY SUPPORT A THREAT FOR SVR

HAIL DESPITE MODEST CLOUD LAYER SHEAR.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 20015.





...CORFIDI

