Tornado Watch 836

Issued

Sep 4, 2011, 3:47 PM CDT (20:47 UTC)

Expired

Sep 4, 2011, 10:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Mobile radar (KMOB), 93 km from the middle of the area, began a volume at 20:49 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

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

30%

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 2123Sep 4, 2:47 PM CDT
• Mesoscale Discussion 2126Sep 4, 6:29 PM CDT

850 
WWUS20 KWNS 042048
SEL6
SPC WW 042048
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-050300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 836
NWS STORM PREDICTION CENTER NORMAN OK
350 PM CDT SUN SEP 4 2011

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

       SOUTHERN AND PARTS OF CENTRAL ALABAMA
       FAR WESTERN FLORIDA PANHANDLE
       EASTERN AND SOUTHEASTERN LOUISIANA
       SOUTHERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 350 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST OF MC
COMB MISSISSIPPI TO 40 MILES NORTHEAST OF CRESTVIEW 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 832...WW 833...WW
834...WW 835...

DISCUSSION...TS LEE CENTER CONTINUES A SLOW NWD DRIFT ABOUT 35 NM NW
OF KBTR.  CENTER SHOULD TURN MORE NEWD THIS EVE AS INFLUENCE OF AN
UPR TROUGH OVER THE UPR GRTLKS/MIDWEST GRAZES THE REGION.  TO THE
EAST OF THE CENTER...BOUNDARY LAYER DEW POINTS IN THE MID 70S WILL
EDGE NWD WITH TIME INTO ECNTRL MS/CNTRL AL.  UNSTABLE ENVIRONMENT IN
COMBINATION WITH CONSIDERABLE LOW-LEVEL SRH WILL KEEP THE RISKS FOR
BRIEF SUPERCELLS WITH TRANSIENT/BRIEF TORNADOES ALIVE AS SPIRAL
BANDS CONTINUE TO ROTATE THROUGH THE REGION THROUGH THIS EVE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 17025.


...RACY

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