WATCHES: Severe Thunderstorm Watch Number 510

WWUS20 KWNS 112210
SEL0
SPC WW 112210
COZ000-NMZ000-OKZ000-TXZ000-120600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 510
NWS STORM PREDICTION CENTER NORMAN OK
410 PM MDT WED JUL 11 2007

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

EASTERN COLORADO
NORTHEAST NEW MEXICO
WESTERN PART OF THE OKLAHOMA PANHANDLE
WESTERN PART OF THE TEXAS PANHANDLE

EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 410 PM UNTIL MIDNIGHT 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF
LIMON COLORADO TO 50 MILES SOUTH SOUTHWEST OF CLAYTON NEW MEXICO.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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 509...

DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH ALONG
THE CO FRONT RANGE S INTO NRN NM...WITH ADDITIONAL DEVELOPMENT
POSSIBLE EWD INTO THE PLNS INVOF THE PALMER DIVIDE AND DENVER
CYCLONE. DEEP SHEAR APPEARS SUFFICIENT FOR SUPERCELLS IN NE PART OF
WW...WITH WEAKER/MORE UNIDIRECTIONAL SHEAR SUGGESTING MULTICELL
CLUSTERS MORE LIKELY FARTHER S. POTENTIAL WILL EXIST FOR HIGH WIND
AND HAIL GIVEN FAIRLY LARGE T/TD SPREADS AND STEEP MID LVL LAPSE
RATES.

IN NE CO...STRONGER LOW LVL SHEAR AND SMALLER T/TD SPREADS SUGGEST A
SOMEWHAT GREATER SUPERCELL TORNADO POTENTIAL RELATIVE TO POINTS
FARTHER S. PARTS OF NE CO AND PERHAPS SE WY/SW NEB/NW KS MAY
REQUIRE A TORNADO WW A BIT LATER THIS EVENING IF IT APPEARS THAT
SUSTAINED DISCRETE STORMS WILL DEVELOP ON N SIDE OF DENVER CYCLONE.

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 32020.

..CORFIDI

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