WATCHES: Tornado Watch Number 392

WWUS20 KWNS 300621
SEL2
SPC WW 300621
IAZ000-ILZ000-MOZ000-301400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 392
NWS STORM PREDICTION CENTER NORMAN OK
120 AM CDT FRI MAY 30 2008

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

EASTERN IOWA
WESTERN ILLINOIS
NORTHEAST MISSOURI

EFFECTIVE THIS FRIDAY MORNING FROM 120 AM UNTIL 900 AM CDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF CEDAR
RAPIDS IOWA TO 50 MILES SOUTHWEST OF BURLINGTON IOWA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 388...WW 389...WW
390...WW 391...

DISCUSSION...TSTM CLUSTERS WITH EMBEDDED SUPERCELLS EXPECTED TO
CONTINUE FAIRLY RAPIDLY ENE INTO ERN IA LATER THIS MORNING AS 50 KT
SWLY LLJ OVER MO/IA CONTINUES TO SHIFT SLOWLY EWD AND VEERS. WHILE
LOW-LEVEL DESTABILIZATION ACROSS WW AREA WILL OCCUR ONLY
SLOWLY...COMBINATION OF EXISTING SUSTAINED/ROTATING STORMS WITH
EXPECTED SHEAR PROFILES SUGGESTS POSSIBILITY FOR ISOLD
TORNADOES...IN ADDITION TO BOWING SEGMENTS WITH HIGH WIND/MARGINALLY
SVR HAIL...DESPITE WEAK SFC-BASED CAPE.

AVIATION...TORNADOES AND 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 26040.

...CORFIDI

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