Thursday, July 30, 2009

WATCHES: Severe Thunderstorm Watch Number 641

WWUS20 KWNS 302128
SEL1
SPC WW 302128
NMZ000-310500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 641
NWS STORM PREDICTION CENTER NORMAN OK
330 PM MDT THU JUL 30 2009

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

MUCH OF EASTERN NEW MEXICO

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 330 PM UNTIL
1100 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES WEST
NORTHWEST OF RATON NEW MEXICO TO 30 MILES SOUTH SOUTHWEST OF
CARLSBAD NEW MEXICO. 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 639...WW 640...

DISCUSSION...THUNDERSTORMS ARE INCREASING IN NUMBER AND INTENSITY
OVER HIGHER TERRAIN OF ERN NM. WITH UPSLOPE FLOW OF UNSTABLE AIR
MASS AND FAVORABLE NWLY FLOW REGIME...SEVERE THUNDERSTORMS EXPECTED
TO DEVELOP/MOVE SEWD ACROSS ERN NM PLAINS THIS EVENING. A FEW
SUPERCELLS ARE POSSIBLE WITH GREATER THREAT OF LARGE HAIL AND
DAMAGING WINDS.

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 500. MEAN STORM
MOTION VECTOR 32025.


...HALES

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