WATCHES: Tornado Watch Number 692

WWUS20 KWNS 251326
SEL2
SPC WW 251326
LAZ000-CWZ000-251900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 692
NWS STORM PREDICTION CENTER NORMAN OK
725 AM CST TUE DEC 25 2012

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

SOUTHERN LOUISIANA
COASTAL WATERS

EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 725 AM UNTIL
100 PM CST.

TORNADOES...HAIL TO 1 INCH 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 NORTH AND SOUTH OF A LINE FROM 5 MILES NORTHWEST OF
LAFAYETTE LOUISIANA TO 5 MILES SOUTH SOUTHEAST OF SLIDELL
LOUISIANA. 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 691...

DISCUSSION...TSTMS HAVE RECENTLY INTENSIFIED OVER S-CNTRL
LA...APPARENTLY IN RESPONSE TO A LOW-LATITUDE PERTURBATION
TRANSLATING ENEWD ALONG THE IMMEDIATE COAST. 12Z LCH/LIX SOUNDINGS
SHOWED THE PRESENCE OF A MOIST AND MODERATELY UNSTABLE AIR MASS WITH
A WEAKENING CAP WITH EWD EXTENT ACROSS THE WATCH AREA. GIVEN THE
PRESENCE OF ALREADY SUFFICIENT LOW-LEVEL AND DEEP-LAYER SHEAR FOR
SUPERCELLS...A RISK FOR TORNADOES AND LOCALLY DAMAGING WINDS WILL
EXIST WITH ANY SUSTAINED STORMS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 23030.


...MEAD

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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.