WATCHES: Severe Thunderstorm Watch Number 411

WWUS20 KWNS 010637
SEL1
SPC WW 010637
KYZ000-TNZ000-011400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 411
NWS STORM PREDICTION CENTER NORMAN OK
235 AM EDT SUN JUN 1 2008

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

SOUTHERN KENTUCKY
MIDDLE AND EASTERN TENNESSEE

EFFECTIVE THIS SUNDAY MORNING FROM 235 AM UNTIL 1000 AM EDT.

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 90
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTH
SOUTHEAST OF NASHVILLE TENNESSEE TO 40 MILES WEST NORTHWEST OF
LONDON KENTUCKY. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 409...

DISCUSSION...SMALL FORWARD-PROPAGATING MCS WITH EMBEDDED
SUSTAINED/POSSIBLE ROTATING STRUCTURES WILL CONTINUE ESE INTO
LOW-LVL INSTABILITY AXIS LATER THIS MORNING. SYSTEM APPEARS TO BE
ASSOCIATED WITH A MID-LVL IMPULSE THAT IS SHIFTING MODERATE FLOW IN
THE 700-500 MB LAYER FROM WSWLY TO WNWLY AS IT PASSES. ALTHOUGH A
QLCS TORNADO OR TWO CANNOT BE RULED OUT...WEAK LOW-LVL SHEAR
SUGGESTS THAT PRIMARY THREAT WILL BE LOCALLY DMGG WIND.

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 29030.

...CORFIDI

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