Severe Thunderstorm Watch 49

Issued

Mar 13, 2005, 2:30 PM CST (20:30 UTC)

Expired

Mar 13, 2005, 10:00 PM CST

In force

8 hr

Issued by

the Storm Prediction Center

The Jackson/Brandon,MS radar (KDGX), 107 km from the middle of the area, began a volume at 20:32 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.

• Mesoscale Discussion 283Mar 13, 1:50 PM CST
• Mesoscale Discussion 284Mar 13, 2:13 PM CST
• Mesoscale Discussion 287Mar 13, 6:49 PM CST
• Mesoscale Discussion 288Mar 13, 9:17 PM CST

000 
WWUS20 KWNS 132031
SEL9  
SPC WW 132031
ALZ000-LAZ000-MSZ000-140400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 49
NWS STORM PREDICTION CENTER NORMAN OK
330 PM CDT SUN MAR 13 2005

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

       CENTRAL ALABAMA
       NORTHERN LOUISIANA
       CENTRAL MISSISSIPPI

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 330 PM UNTIL 1100
PM CDT.

HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTHWEST OF
SHREVEPORT LOUISIANA TO 40 MILES SOUTH SOUTHEAST OF BIRMINGHAM
ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

DISCUSSION...AIR MASS HAS BECOME MODERATELY TO VERY UNSTABLE S OF
FRONTAL ZONE LOCATED JUST N OF WATCH AREA.  WITH 30-40 KT OF DEEP
LAYER SHEAR AND STEEP LAPSE RATES...STRONG/SEVERE THUNDERSTORMS WILL
DEVELOP VICINITY FRONTAL ZONE. INITIAL THREAT WILL BE LARGE HAIL
AND THEN EVOLVE MORE INTO A WIND DAMAGE THREAT AS STORMS DEVELOP
INTO SHORT LINES/BOWS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 26030.


...HALES

325,0940 333,0862 322,0862 314,0940

Severe Thunderstorm Watches in Louisiana, 2005Severe Thunderstorm Watches in Mississippi, 2005Severe Thunderstorm Watches in Alabama, 2005Every severe thunderstorm watch in 2005

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.