

670 

WWUS20 KWNS 220000

SEL2

SPC WW 220000

COZ000-KSZ000-NEZ000-220500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 372

NWS STORM PREDICTION CENTER NORMAN OK

555 PM MDT MON JUN 21 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR EASTERN COLORADO

       NORTHWESTERN KANSAS

       SOUTHWEST NEBRASKA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 555 PM UNTIL

1100 PM MDT.



HAIL TO 2.5 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 NORTH AND SOUTH OF A LINE FROM 60 MILES NORTH

NORTHWEST OF BURLINGTON COLORADO TO 25 MILES EAST SOUTHEAST OF

MCCOOK NEBRASKA.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 367...WW 368...WW

369...WW 370...WW 371...



DISCUSSION...SUPERCELLS IN NORTHEAST COLORADO ARE EXPECTED TO MOVE

EWD AND PERHAPS GRADUALLY DEVELOP SEWD ALONG A SURFACE BOUNDARY THAT

EXTENDS FROM NEAR LIC TO NEAR GLD. WHILE A BRIEF TORNADO IS

POSSIBLE...WEAK LOW LEVEL SHEAR AND RELATIVELY LARGE SURFACE

TEMPERATURE/DEWPOINT SPREADS INDICATE THAT THE STORMS SHOULD BE

MOSTLY OUTFLOW DOMINANT WITH HAIL AND DAMAGING WINDS THE GREATER

THREAT.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 28025.





...IMY

