WATCHES: Severe Thunderstorm Watch Number 328

WWUS20 KWNS 041933
SEL8
SPC WW 041933
COZ000-NMZ000-OKZ000-TXZ000-050300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 328
NWS STORM PREDICTION CENTER NORMAN OK
125 PM MDT THU JUN 4 2009

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

EASTERN COLORADO
NORTHEASTERN NEW MEXICO
WESTERN OKLAHOMA PANHANDLE
NORTHWESTERN TEXAS PANHANDLE

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 125 PM UNTIL
900 PM MDT.

HAIL TO 2.5 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 85
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF
AKRON COLORADO TO 25 MILES SOUTH OF TUCUMCARI NEW MEXICO. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).

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 327...

DISCUSSION...CONVECTION HAS DEVELOPED OVER THE HIGHER TERRAIN OF
COLORADO AND NRN NEW MEXICO...AND SHOULD INTENSIFY AS THE STORMS
MOVE SEWD INTO A WARMING AND DESTABILIZING AIR MASS ALONG AND EAST
OF THE FOOTHILLS. MODERATE INSTABILITY AND 30-40 KT DEEP LAYER SHEAR
WILL BE SUPPORTIVE OF SUPERCELLS. THE COMBINATION OF STEEP LAPSE
RATES AND EXPECTED MID LEVEL ROTATION IN STORMS FAVORS LARGE HAIL AS
THE MAIN THREAT. HOWEVER...A BRIEF TORNADO IS ALSO POSSIBLE ALONG
E-W ORIENTED BOUNDARY LOCATED ALONG THE PALMER DIVIDE.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 32025.

...IMY

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