WATCHES: Severe Thunderstorm Watch Number 370

WWUS20 KWNS 102046
SEL0
SPC WW 102046
IAZ000-KSZ000-MOZ000-NEZ000-110400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 370
NWS STORM PREDICTION CENTER NORMAN OK
345 PM CDT SUN JUN 10 2012

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

WESTERN AND CENTRAL IOWA
NORTHEAST KANSAS
NORTHWEST MISSOURI
EASTERN NEBRASKA

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
1100 PM CDT.

HAIL TO 2 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 70
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF
SPENCER IOWA TO 40 MILES SOUTHWEST OF TOPEKA KANSAS. 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 368...WW 369...

DISCUSSION...TSTM DEVELOPMENT IS ANTICIPATED WITHIN THE NEXT HOUR
INVOF OF COLD FRONT MOVING EWD/SEWD ACROSS THE WATCH AREA. LATEST
OBJECTIVE DATA INDICATE THAT PRE-FRONTAL AIR MASS HAS BECOME
MODERATE-STRONGLY UNSTABLE WITH MLCAPE RANGING FROM 1000-1500 J/KG
ACROSS NWRN IA TO 3000-3500 J/KG OVER NERN KS. WHILE STRONGER MID
AND HIGH-LEVEL WIND FIELD LAGS WARM SECTOR TO THE W...A NARROW BAND
OF 30-40 KT SWLY DEEP-LAYER SHEAR COINCIDES WITH THE FRONT. AS
SUCH...SETUP WILL BE SUPPORTIVE OF LINE SEGMENTS AND SUPERCELL STORM
MODES WITH AN ASSOCIATED THREAT FOR LARGE HAIL AND DAMAGING WIND
GUSTS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 23025.


...MEAD

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