Tornado Watch 832

Issued

Sep 4, 2011, 5:05 AM CDT (10:05 UTC)

Expired

Sep 4, 2011, 4:00 PM CDT

In force

11 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

65 kt

The Mobile radar (KMOB), 91 km from the middle of the area, began a volume at 10:06 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

70%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

20%

One or more gusts of 65 knots or more

5%

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

50%

• Mesoscale Discussion 2116Sep 4, 4:30 AM CDT
• Mesoscale Discussion 2118Sep 4, 9:50 AM CDT
• Mesoscale Discussion 2123Sep 4, 2:47 PM CDT

977 
WWUS20 KWNS 041018
SEL2
SPC WW 041018
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-042100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 832
NWS STORM PREDICTION CENTER NORMAN OK
505 AM CDT SUN SEP 4 2011

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

       SOUTHERN ALABAMA
       THE WESTERN HALF OF THE FLORIDA PANHANDLE
       SOUTHEAST LOUISIANA
       SOUTHERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 505 AM UNTIL 400
PM 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 80 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH SOUTHWEST OF
BATON ROUGE LOUISIANA TO 30 MILES EAST NORTHEAST OF CRESTVIEW
FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 830...WW 831...

DISCUSSION...T.S. LEE APPEARS TO BE ELONGATING ATTM AS AN APPARENT
MID LVL VORT MAX CONTINUES TO MOVE ESE INTO SRN QUADRANT OF SYSTEM.
THIS DEVELOPMENT...PLUS GFS/ECMWF MODEL FCSTS SHOWING LOW LVL
CIRCULATION REMAINING MORE OR LESS STNRY NEAR THE CNTRL LA CST...
SUGGESTS THAT THE CORRIDOR OF HIGHEST THETA-E AIR WILL CONTINUE TO
SPREAD SLOWLY NNW FROM THE GPT/MOB AREA TOWARD/INTO CNTRL MS LATER
TODAY.  AT THE SAME TIME...MID LVL DRY SLOT ASSOCIATED WITH THE UPR
VORT WILL ROTATE FARTHER NNE ACROSS SE LA...SE MS...AND SW AL.
GIVEN CONTINUING PRESENCE OF STRONG LOW LVL WIND FIELD WITH SIZABLE
LOW LVL DIRECTIONAL SHEAR...SETUP COULD BECOME INCREASINGLY
FAVORABLE FOR SCTD SUPERCELLS WITH LOW LVL MESOCYCLONES/TORNADOES.
FARTHER E...A SQLN WITH EMBEDDED LEWPS HAS EVOLVED OVER THE WRN FL
PANHANDLE SWD INTO THE GULF...ALONG THE LEADING EDGE OF THE STRONGER
LOW LVL WIND FIELD ASSOCIATED WITH T.S LEE.  SUFFICIENT
SHEAR/MOISTURE MAY PERSIST TO SUPPORT A THREAT FOR LOCALLY DMGG WIND
AND POSSIBLY AN ISOLD TORNADO WITH THIS ACTIVITY 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 16035.


...CORFIDI

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