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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 85

NWS STORM PREDICTION CENTER NORMAN OK

220 PM MDT MON APR 8 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN COLORADO



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 220 PM UNTIL 900

PM 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 35

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH

NORTHEAST OF AKRON COLORADO TO 30 MILES SOUTH OF LAMAR COLORADO.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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.



DISCUSSION...HIGH-BASED THUNDERSTORM DEVELOPMENT IS EXPECTED IN THE

NEXT COUPLE OF HOURS AS SURFACE HEATING/MIXING CONTINUES ACROSS ERN

CO IN A STEEP LAPSE RATE ENVIRONMENT.  VERTICAL SHEAR PROFILES WILL

BE FAVORABLE FOR SUPERCELLS...WITH LARGE HAIL THE PRIMARY THREAT

GIVEN THE LIMITED LOW-LEVEL MOISTURE AS OF EARLY AFTERNOON.  AREAS

FARTHER E INTO W/NW KS WILL BE MONITORED FOR MORE OF A MOISTURE

INCREASE THIS AFTERNOON/EVENING...AND SOME THREAT FOR A COUPLE OF

TORNADOES AS THE ERN CO STORMS MATURE AND MOVE INTO KS CLOSER TO 23Z

OR SO.



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 450. MEAN STORM

MOTION VECTOR 23025.





...THOMPSON

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