Tornado Watch 876

Issued

Nov 8, 2011, 1:59 PM CST (19:59 UTC)

Expired

Nov 8, 2011, 8:00 PM CST

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

Counties Chambers County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Houston County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX

The Houston radar (KHGX), 133 km from the middle of the area, began a volume at 20:02 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.

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

20%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

60%

• Mesoscale Discussion 2302Nov 8, 1:03 PM CST
• Mesoscale Discussion 2303Nov 8, 1:44 PM CST
• Mesoscale Discussion 2305Nov 8, 3:53 PM CST
• Mesoscale Discussion 2306Nov 8, 5:09 PM CST

507 
WWUS20 KWNS 081959
SEL6
SPC WW 081959
TXZ000-CWZ000-090200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 876
NWS STORM PREDICTION CENTER NORMAN OK
200 PM CST TUE NOV 8 2011

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

       SOUTHEAST TEXAS
       COASTAL WATERS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 200 PM UNTIL
800 PM CST.

TORNADOES...HAIL TO 1.5 INCHES 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 40 MILES WEST SOUTHWEST OF
HUNTSVILLE TEXAS TO 45 MILES NORTH NORTHEAST OF PORT ARTHUR
TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

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 875...

DISCUSSION...PRE-FRONTAL CONVECTION WILL PERSIST THROUGH THE
AFTERNOON...WHILE ADDITIONAL STORMS ARE EXPECTED TO FORM ALONG THE
COLD FRONT LATER THIS AFTERNOON/EVENING AS IT MOVES ACROSS SE TX.
THE PRE-FRONTAL ENVIRONMENT REMAINS QUITE MOIST AND MODERATELY
UNSTABLE...WHILE LOCAL VWP/S REVEAL SUFFICIENT VERTICAL SHEAR TO
MAINTAIN A RISK FOR ISOLATED SUPERCELLS WITH AN ATTENDANT RISK FOR A
TORNADO OR TWO.  A FEW DAMAGING GUSTS WILL ALSO BE POSSIBLE.

AVIATION...TORNADOES AND 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
500. MEAN STORM MOTION VECTOR 24025.


...THOMPSON

Tornado Watches in Texas, 2011Every tornado watch in 2011

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.