

653 

WWUS20 KWNS 210031

SEL8

SPC WW 210031

COZ000-KSZ000-210700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 608

NWS STORM PREDICTION CENTER NORMAN OK

625 PM MDT MON JUL 20 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR EASTERN COLORADO

       WESTERN KANSAS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 625 PM UNTIL

100 AM MDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH

NORTHWEST OF BURLINGTON COLORADO TO 50 MILES SOUTH OF DODGE CITY

KANSAS.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 606...WW 607...



DISCUSSION...SUPERCELL COMPLEX NOW IN NW KS EXPECTED TO CONTINUE

SSE...MORE OR LESS IN TANDEM WITH COLD/MOIST FRONTAL SURGE JUST TO

ITS NORTH.  COMBINATION OF SIZABLE TEMPERATURE-DEW POINT SPREADS

AHEAD OF CLUSTER...INCREASING LARGE SCALE FORCING FOR ASCENT...AND

WIND PROFILES THAT SHOULD BE SUPPORTIVE OF STRENGTHENING FORWARD /S

TO SSE-DIRECTED/ PROPAGATION TOGETHER SUGGEST A CONTINUED POTENTIAL

FOR HIGH WIND AND SVR HAIL INTO LATER THIS EVENING.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 35035.





...CORFIDI

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