WATCHES: Tornado Watch Number 185

WWUS20 KWNS 181843
SEL5
SPC WW 181843
COZ000-190300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 185
NWS STORM PREDICTION CENTER NORMAN OK
145 PM CDT TUE MAY 18 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

MUCH OF EASTERN COLORADO

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 145 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHEAST OF FORT
COLLINS COLORADO TO 35 MILES WEST SOUTHWEST OF SPRINGFIELD
COLORADO. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

DISCUSSION...THUNDERSTORMS EXPECTED TO INCREASE QUICKLY THIS
AFTERNOON IN NUMBER AND INTENSITY ACROSS THE WATCH AREA WITH THE
APPROACH OF UPR TROUGH AND VERY FAVORABLE SHEAR PROFILES IN PLACE.
WITH HEATING THE AIR MASS IS NOW MDTLY UNSTABLE...MLCAPES TO 1200
J/KG. MOST FAVORED AREAS INITIALLY FOR SUPERCELLS AND
TORNADOES/LARGE HAIL WILL BE ASSOCIATED WITH THE SURFACE CONVERGENCE
N OF PALMER DIVIDE. SUPERCELLS WILL BECOME MORE COMMON THRU
AFTERNOON AS ACTIVITY BUILDS EWD ACROSS THE WATCH. PRIMARY THREAT
WILL BE LARGE HAIL AND AT LEAST ISOLATED TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 26025.

...HALES

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