WATCHES: Severe Thunderstorm Watch Number 601

WWUS20 KWNS 181944
SEL1
SPC WW 181944
COZ000-NMZ000-OKZ000-TXZ000-190300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 601
NWS STORM PREDICTION CENTER NORMAN OK
245 PM CDT SAT JUL 18 2009

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

PARTS OF SOUTHEAST COLORADO
LARGE PART OF EASTERN NEW MEXICO
PARTS OF OKLAHOMA PANHANDLE
PARTS OF TEXAS PANHANDLE

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
1000 PM CDT.

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 95
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH
NORTHWEST OF LA JUNTA COLORADO TO 65 MILES SOUTH OF CANNON AFB
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.

DISCUSSION...THUNDERSTORMS EXPECTED TO INCREASE IN NUMBER/INTENSITY
OVER HIGHER TERRAIN AND MOVE SEWD ACROSS THE HIGH PLAINS. 40-50KT
OF DEEP LAYER SHEAR...STEEP LAPSE RATES AND MLCAPES TO 1500 J/KG
SUPPORT SUPERCELL POTENTIAL. LARGE HAIL AND DOWNBURSTS WINDS WILL
BE ASSOCIATED WITH ANY SUPERCELL AND AS STORMS DEVELOP INTO
CLUSTERS...WIND DAMAGE WILL INCREASE BY THIS EVENING AS ACTIVITY
DEVELOPS SEWD ACROSS THE WATCH

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 550. MEAN STORM
MOTION VECTOR 33025.

...HALES

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