WATCHES: Severe Thunderstorm Watch Number 514

WWUS20 KWNS 122223
SEL4
SPC WW 122223
COZ000-KSZ000-NEZ000-130600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 514
NWS STORM PREDICTION CENTER NORMAN OK
520 PM CDT THU JUL 12 2007

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

EASTERN COLORADO
NORTHERN AND CENTRAL KANSAS
SOUTHERN NEBRASKA

EFFECTIVE THIS THURSDAY AFTERNOON AND FRIDAY MORNING FROM 520 PM
UNTIL 100 AM CDT.

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 190
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES WEST
NORTHWEST OF MCCOOK NEBRASKA TO 45 MILES SOUTH OF HILL CITY
KANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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 513...

DISCUSSION...BAND OF TSTMS IN SRN PART OF WW 513 SHOULD CONTINUE TO
MOVE/DEVELOP GENERALLY SSE INTO PARTS OF NE CO AND SRN NEB LATER
THIS EVENING... WITH ADDITIONAL ACTIVITY POSSIBLY FORMING AHEAD OF
LINE. SFC-BASED INSTABILITY DECREASES WITH EWD EXTENT /FROM AROUND
2000 J/KG IN NE CO TO BELOW 1000 J/KG IN ERN PART OF WW/...WHILE
DEEP NWLY SHEAR INCREASES FROM AROUND 25 KTS IN CO TO NEAR 40 KTS IN
S CNTRL NEB. OVERALL SETUP SUGGESTS CONTINUED THREAT FOR LARGE
HAIL/WIND IN WRN HALF OF WW...WITH A LOCAL HIGH WIND THREAT
PREDOMINATING FARTHER E.

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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