WATCHES: Tornado Watch Number 164

WWUS20 KWNS 161949
SEL4
SPC WW 161949
LAZ000-170100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 164
NWS STORM PREDICTION CENTER NORMAN OK
250 PM CDT THU MAY 16 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF
NORTHERN LOUISIANA

* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 250 PM UNTIL
800 PM CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL TORNADOES POSSIBLE
SEVERAL VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH SOUTHWEST OF
SHREVEPORT LOUISIANA TO 45 MILES NORTH NORTHEAST OF ALEXANDRIA
LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 163...

DISCUSSION...A SHORT BOWING LINE SEGMENT WITH WEAK ROTATION ON THE
SRN FLANK HAS SHOWN SIGNS OF INTENSIFYING RECENTLY. STORM IS MOVING
INTO AN INCREASINGLY FAVORABLE THERMODYNAMIC ENVIRONMENT AS
EVIDENCED BY RECENT DOWNSTREAM CU FIELD DEVELOPMENT WHERE STRONG
HEATING IS OCCURRING. 18Z SHV RAOB AND LATEST SHV VAD PROFILE SHOW
STRONG VEERING WITH HEIGHT AND SUFFICIENT SHEAR TO SUPPORT AN
ORGANIZED SEVERE THREAT WITH SUPERCELLS AND POTENTIAL FOR A TORNADO
OR TWO.

AVIATION...TORNADOES AND 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 28025.


...WEISS

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