Tornado Watch 595

Issued

Aug 29, 2012, 3:53 PM CDT (20:53 UTC)

Expired

Aug 30, 2012, 12:00 AM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Strongest gust expected

60 kt

Two or more tornadoes

30%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

20%

One or more gusts of 65 knots or more

10%

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

30%

• Mesoscale Discussion 1834Aug 29, 3:17 PM CDT
• Mesoscale Discussion 1836Aug 29, 8:21 PM CDT
• Mesoscale Discussion 1837Aug 29, 11:06 PM CDT

647 
WWUS20 KWNS 292054
SEL5
SPC WW 292054
ALZ000-LAZ000-MSZ000-CWZ000-300500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 595...RESENT
NWS STORM PREDICTION CENTER NORMAN OK
350 PM CDT WED AUG 29 2012

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

       FAR SOUTHWEST ALABAMA
       SOUTHEAST LOUISIANA
       SOUTHERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 350 PM UNTIL MIDNIGHT CDT.

TORNADOES...THUNDERSTORM WIND GUSTS TO 70 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 35 MILES NORTH NORTHWEST OF
BATON ROUGE LOUISIANA TO 35 MILES EAST SOUTHEAST OF MOBILE
ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 594. WATCH NUMBER 594 WILL NOT BE IN EFFECT AFTER
350 PM CDT.

DISCUSSION...CONVECTIVE BANDS TO THE EAST/NORTHEAST OF TS ISAAC ARE
EXPECTED TO CONTINUE LIFTING NWD/NWWD FROM THE ADJACENT GULF COASTAL
WATERS INTO SERN LA/SRN MS AND SWRN AL INTO THE EVENING.  VAD WIND
PROFILES AT KLIX/KMOB/KDGX SHOW 50-70 KT LOW LEVEL WINDS...VERY
STRONG LOW LEVEL SHEAR IN THE LOWEST 1 KM...AND 150-300 M2/S2 SRH
BASED ON OBSERVED STORM MOTIONS.  THIS IS CONSISTENT WITH RADAR
OBSERVATIONS OF SHALLOW/BRIEF SUPERCELLS EMBEDDED WITHIN THE
CONVECTIVE BANDS WHICH WILL MAINTAIN A THREAT FOR ISOLATED TORNADOES
INTO TONIGHT AS ISAAC MOVES SLOWLY NWWD ACROSS SRN LA.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 15050.


...WEISS

Tornado Watches in Mississippi, 2012Tornado Watches in Louisiana, 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.