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000 

WWUS20 KWNS 030150

SEL6

SPC WW 030150

COZ000-030600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 426

NWS STORM PREDICTION CENTER NORMAN OK

750 PM MDT MON JUN 2 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST COLORADO



EFFECTIVE THIS MONDAY NIGHT FROM 750 PM UNTIL MIDNIGHT MDT.



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 45

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH

NORTHWEST OF AKRON COLORADO TO 10 MILES SOUTHWEST OF LIMON

COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 422...WW 423...WW 425...



DISCUSSION...CONVECTION HAS FORMED JUST E OF THE I-25 CORRIDOR IN CO

IN THE PAST HOUR OR SO.  THIS CONVECTION WILL HAVE A NARROW WINDOW

OF OPPORTUNITY TO PRODUCE MAINLY LARGE HAIL AS IT SPREADS EWD IN AN

ENVIRONMENT OF MODERATE INSTABILITY AND SUFFICIENT BULK SHEAR FOR

SUPERCELLS.  THE ERN EXTENT OF THE SEVERE THREAT WILL LIKELY BE

LIMITED BY A STRONGER CAP AND COOLER AIR MASS BACKING WWD ACROSS THE

NE CO PLAINS.



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 500. MEAN STORM

MOTION VECTOR 28015.





...THOMPSON

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