Tornado Watch 594

Issued

Aug 29, 2012, 6:36 AM CDT (11:36 UTC)

Expired

Aug 29, 2012, 4:00 PM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

65 kt

The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 11:37 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

60%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

10%

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

40%

• Mesoscale Discussion 1831Aug 29, 5:46 AM CDT
• Mesoscale Discussion 1832Aug 29, 11:48 AM CDT
• Mesoscale Discussion 1834Aug 29, 3:17 PM CDT

413 
WWUS20 KWNS 291136
SEL4
SPC WW 291136
ALZ000-LAZ000-MSZ000-CWZ000-292100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 594
NWS STORM PREDICTION CENTER NORMAN OK
635 AM CDT WED AUG 29 2012

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

       SOUTHWEST ALABAMA
       SOUTHEAST LOUISIANA
       SOUTHERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 635 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 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 30 MILES EAST SOUTHEAST OF
MOBILE ALABAMA TO 60 MILES WEST NORTHWEST OF NEW ORLEANS
LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 593. WATCH NUMBER 593 WILL NOT BE IN EFFECT AFTER
635 AM CDT.

DISCUSSION...HURRICANE ISAAC WILL CONTINUE TO DRIFT SLOWLY WWD TODAY
NEAR THE SE LA COAST.  MULTIPLE CONVECTIVE BANDS WILL PERSIST IN THE
AREA OF STRONGER LOW-LEVEL SHEAR NE OF THE CYCLONE CENTER...WHERE
THE ENVIRONMENT WILL BE FAVORABLE FOR EMBEDDED SUPERCELLS AND A FEW
TORNADOES THROUGH THIS AFTERNOON.

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 16050.


...THOMPSON

Tornado Watches in Louisiana, 2012Tornado Watches in Mississippi, 2012Tornado Watches in Alabama, 2012Every tornado watch in 2012

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.