WATCHES: Severe Thunderstorm Watch Number 541

WWUS20 KWNS 032049
SEL1
SPC WW 032049
COZ000-NEZ000-040300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 541
NWS STORM PREDICTION CENTER NORMAN OK
250 PM MDT FRI JUL 3 2009

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

NORTHEAST COLORADO
WESTERN NEBRASKA

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 250 PM UNTIL 900
PM MDT.

HAIL TO 1.5 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 65
STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH
NORTHWEST OF MULLEN NEBRASKA TO 30 MILES WEST OF AKRON COLORADO.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 540...

DISCUSSION...STORMS WILL CONTINUE TO INCREASE FROM SERN WY ACROSS
NERN CO AND INTO THE NEB PANHANDLE THROUGH THE EVENING HOURS. THIS
ACTIVITY WAS DEVELOPING WITHIN A MODESTLY UNSTABLE AIRMASS WHERE
EFFECTIVE DEEP-LAYER SHEAR AROUND 40KT WILL SUPPORT SUPERCELLS. LIFT
ACROSS THE REGION WILL BE ENHANCED/SUSTAINED BY SHORT WAVE TROUGH
DEVELOPING EAST FROM THE ROCKIES AND SHOULD CONTRIBUTE TO AN
INCREASING THREAT FOR LARGE HAIL AND HIGH WINDS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 28020.

...CARBIN

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