Tornado Watch 826

Issued

Sep 3, 2011, 1:43 AM CDT (06:43 UTC)

Expired

Sep 3, 2011, 9:44 AM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

65 kt

Two or more tornadoes

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 2100Sep 2, 11:32 PM CDT
• Mesoscale Discussion 2105Sep 3, 7:46 AM CDT

359 
WWUS20 KWNS 030652
SEL6
SPC WW 030652
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-031500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 826
NWS STORM PREDICTION CENTER NORMAN OK
145 AM CDT SAT SEP 3 2011

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

       FAR SOUTHERN ALABAMA
       WESTERN FLORIDA PANHANDLE
       SOUTHEASTERN LOUISIANA
       FAR SOUTHERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS SATURDAY MORNING FROM 145 AM UNTIL 1000 AM CDT.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST OF HOUMA
LOUISIANA TO 40 MILES EAST NORTHEAST OF PENSACOLA FLORIDA.  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 824...WW 825...

DISCUSSION...THREAT FOR ISOLD TORNADOES EXPECTED TO GRADUALLY
INCREASE OVER THE CNTRL GULF CST THROUGH LATER TODAY AS T.S. LEE
MOVES SLOWLY NWD.  ENVELOPE OF RICH TROPICAL MOISTURE ASSOCIATED
WITH LEE APPEARS TO HAVE EDGED NW INTO EXTREME SERN LA...AND SHOULD
SPREAD FARTHER NNW ACROSS SE LA AND EXTREME SRN MS LATER THIS
MORNING.  WITH NEIGHBORING UPR LOW MAINTAINING SOMEWHAT COOLER THAN
NORMAL MID LVL TEMPS INVOF THE TROPICAL DISTURBANCE...DEEP
INSTABILITY HAS BEEN SUFFICIENT TO MAINTAIN SCTD TSTMS CLOSE JUST
OFF THE SE LA CST...WITH OTHER STORMS PRESENT OVER THE GULF WATERS S
OF VPS.  GIVEN EXPECTED STRENGTHENING OF LOW LVL DIRECTIONAL/SPEED
SHEAR...AND INCREASING LOW LVL MOISTURE...SETUP MAY POSE AN
INCREASING RISK FOR LOW LVL MESOCYCLONES/TORNADOES WITH THE
CONVECTION THROUGH LATER THIS MORNING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 15035.


...CORFIDI

Tornado Watches in Louisiana, 2011Tornado Watches in Mississippi, 2011Tornado Watches in Florida, 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.