WATCHES: Severe Thunderstorm Watch Number 578

WWUS20 KWNS 140105
SEL8
SPC WW 140105
ARZ000-LAZ000-MSZ000-140600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 578
NWS STORM PREDICTION CENTER NORMAN OK
800 PM CDT MON AUG 13 2012

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

FAR SOUTHEAST ARKANSAS
FAR NORTHEAST LOUISIANA
CENTRAL MISSISSIPPI

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 800 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 85
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES EAST
NORTHEAST OF GREENWOOD MISSISSIPPI TO 10 MILES SOUTHWEST OF
JACKSON MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 577...

DISCUSSION...SCTD TSTMS...INCLUDING SEMI-DISCRETE SUSTAINED STORMS
AND TRANSIENT SUPERCELLS IN SHORT BANDS AND CLUSTERS...EXPECTED TO
PERSIST THROUGH LATE EVE IN ZONE OF WAA ON W SIDE OF RETREATING COOL
DOME LEFT BY EARLIER MCS. MODERATE WNWLY DEEP SHEAR...VERY MOIST
LOW LVL ENVIRONMENT...AND FAIRLY STEEP MID LVL LAPSE RATES MAY
CONTINUE TO YIELD SVR HAIL AND LOCALLY DMGG WIND. A TORNADO ALSO
CANNOT BE RULED OUT...AND THIS POTENTIAL WILL CONTINUE TO BE
MONITORED. BUT GIVEN CURRENT DOMINANT STORM CONFIGURATION /BROKEN
CLUSTERS/...ONSET OF NIGHTFALL /WITH LESSENING LOW LVL LAPSE
RATES/...AND LITTLE INCREASE IN STRENGTH OF LOW LVL FLOW EXPECTED
THROUGH LATE EVE...POTENTIAL SEEMS TOO LOW TO WARRANT A TORNADO
WATCH ATTM.

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 550. MEAN STORM
MOTION VECTOR 29020.


...CORFIDI

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.