Tornado Watch 809

Issued

Nov 15, 2001, 11:45 AM CST (17:45 UTC)

Expired

Nov 15, 2001, 6:00 PM CST

In force

6 hr

Issued by

the Storm Prediction Center

The Austin/San Antonio radar (KEWX), 13 km from the middle of the area, began a volume at 17:45 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 151723
SEL9  
SPC WW 151716
TXZ000-CWZ000-160000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 809
STORM PREDICTION CENTER NORMAN OK
1116 AM CST THU NOV 15 2001

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

   SOUTH CENTRAL AND SOUTHEAST TEXAS                              
   COASTAL WATERS                     

EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 1145 AM UNTIL
600 PM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 85 STATUTE MILES EITHER SIDE OF
A LINE FROM 60 MILES NORTH OF HONDO TEXAS TO 30 MILES SOUTH
SOUTHWEST OF PALACIOS TEXAS.

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.


DISCUSSION...THUNDERSTORMS OVER PARTS OF SRN TX ARE EXPECTED TO
INTENSIFY THIS AFTERNOON AS AIR MASS CONTINUES TO DESTABILIZE. 
VERTICAL SHEAR PROFILES IN ADVANCE OF UPPER LOW OVER SWRN TX REMAIN
FAVORABLE FOR SEVERE THUNDERSTORMS...INCLUDING OCCASIONAL
SUPERCELLS.  CURRENT CONVECTION IS LIKELY TO CONTINUE SPREADING
NWD...WITH NEW DEVELOPMENT EXPECTED AS OUTFLOW BOUNDARY MOVES EWD
INTO SOUTH CENTRAL TX.

ADDITIONAL WATCHES...AREA TO THE SOUTH OF WW 809 WILL BE MONITORED
FOR ADDITIONAL CONVECTIVE DEVELOPMENT AND POSSIBILITY OF ANOTHER
WATCH THIS AFTERNOON.


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 19025.


...WEISS

311,0982 292,0953 271,0971 291,0995

Tornado Watches in Texas, 2001Every tornado watch in 2001

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.