Tornado Watch 799

Issued

Dec 23, 2002, 2:10 PM CST (20:10 UTC)

Expired

Dec 23, 2002, 8:00 PM CST

In force

6 hr

Issued by

the Storm Prediction Center

The Houston radar (KHGX), 124 km from the middle of the area, began a volume at 20:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

000 
WWUS20 KWNS 232011
SEL9  
WWUS20 KWNS 232010
SPC WW 232010
LAZ000-TXZ000-CWZ000-240200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 799
STORM PREDICTION CENTER NORMAN OK
210 PM CST MON DEC 23 2002

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

   SOUTHERN AND WESTERN LOUISIANA                          
   CENTRAL AND SOUTHEAST TEXAS                              
   COASTAL WATERS                     

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 800
PM CST.

 ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
 
DAMAGING TORNADOES...LARGE HAIL TO 2 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 65 MILES NORTH NORTHWEST OF VICTORIA TEXAS TO
15 MILES EAST SOUTHEAST OF ALEXANDRIA LOUISIANA.

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...THIS TORNADO WATCH REPLACES TORNADO WATCH
NUMBER 798.  WATCH NUMBER 798 WILL NOT BE IN EFFECT AFTER 210 PM
CST.

DISCUSSION...RAPID DEVELOPMENT OF SEVERE THUNDERSTORMS UNDERWAY
ACROSS SERN TX AND INTO SWRN LA. STRONG VEERING SHEAR PROFILES AND
MUCAPES TO 2500 J/KG ARE VERY FAVORABLE FOR FORMATION OF TORNADIC
SUPERCELLS VICINTY AND S OF WARM FRONT THAT EXTENDS EWD FROM
SURFACE LOW E OF AUS TO CENTRAL LA.  

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 24040.


...HALES

304,0971 322,0920 301,0920 283,0971

Tornado Watches in Texas, 2002Tornado Watches in Louisiana, 2002Every tornado watch in 2002

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.