WATCHES: Severe Thunderstorm Watch Number 492

WWUS20 KWNS 171856
SEL2
SPC WW 171856
COZ000-180200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 492
NWS STORM PREDICTION CENTER NORMAN OK
155 PM CDT FRI JUN 17 2011

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

LARGE PART OF EASTERN COLORADO

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 155 PM UNTIL 900
PM CDT.

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 80
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH
NORTHEAST OF LIMON COLORADO TO 20 MILES SOUTH OF LA JUNTA
COLORADO. 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 490...WW 491...

DISCUSSION...THUNDERSTORMS ARE INCREASING E OF FRONT RANGE IN AREA
OF GREATEST DESTABILIZATION AND VEERING SHEAR PROFILES. WITH
CONTINUED HEATING BOTH INSTABILITY AND SHEAR EXPECTED TO INCREASE
THRU THE AFTERNOON WITH SEVERE THUNDERSTORMS DEVELOPING EWD ACROSS
THE WATCH. SUPERCELLS ARE LIKELY WITH PRIMARY THREAT OF LARGE HAIL
AND DAMAGING WIND. HOWEVER POTENTIAL EXISTS FOR LANDSPOUTS AND
BRIEF TORNADOES WITH ANY SUPERCELL.

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 26025.

...HALES

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