Monday, June 2, 2008

WATCHES: Severe Thunderstorm Watch Number 419

WWUS20 KWNS 021251
SEL9
SPC WW 021251
KSZ000-MOZ000-NEZ000-021900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 419
NWS STORM PREDICTION CENTER NORMAN OK
750 AM CDT MON JUN 2 2008

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

NORTH-CENTRAL AND NORTHEASTERN KANSAS
NORTHWESTERN AND EXTREME WEST-CENTRAL MISSOURI
SOUTH-CENTRAL AND SOUTHEASTERN NEBRASKA

EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 750 AM UNTIL 200
PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTH
SOUTHWEST OF KEARNEY NEBRASKA TO 15 MILES NORTH NORTHEAST OF
KANSAS CITY MISSOURI. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 418. WATCH NUMBER 418 WILL NOT
BE IN EFFECT AFTER 750 AM CDT.

DISCUSSION...DEVELOPING MCS -- ASTRIDE CENTRAL PORTIONS KS/NEB
BORDER AS OF WW ISSUANCE -- IS EXPECTED TO CONTINUE TO
ORGANIZE/INTENSIFY AS IT MOVES ESEWD PARALLEL TO LOW LEVEL WARM
FRONTAL ZONE. LARGE HAIL IS PRIMARY INITIAL THREAT.
HOWEVER...FOREGOING INFLOW LAYER AIR MASS SHOULD BECOME ROOTED
PROGRESSIVELY CLOSER TO SFC WITH TIME AS BOUNDARY LAYER DIABATICALLY
DESTABILIZES. THIS PROCESS -- COMBINED WITH POSSIBLE BOWING
ORGANIZATION TO CONVECTION -- SHOULD RESULT IN INCREASING THREAT FOR
SVR WIND AT SFC.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29035.


...EDWARDS/CORFIDI

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