Severe Thunderstorm Watch 623

Issued

Aug 20, 2002, 2:10 PM CDT (19:10 UTC)

Expired

Aug 20, 2002, 7:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

000 
WWUS20 KWNS 201909
SEL3  
SPC WW 201910
ALZ000-MSZ000-210000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 623
STORM PREDICTION CENTER NORMAN OK
210 PM CDT TUE AUG 20 2002

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

   NORTHERN AND WESTERN ALABAMA                            
   EASTERN AND CENTRAL MISSISSIPPI                        

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 700
PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 80 STATUTE MILES
EAST AND WEST OF A LINE FROM 20 MILES SOUTH SOUTHWEST OF LAUREL
MISSISSIPPI TO 25 MILES NORTH NORTHWEST OF HUNTSVILLE ALABAMA.

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.

OTHER WATCH INFORMATION...  CONTINUE...WW 622...

DISCUSSION...AIRMASS ACROSS AREA VERY UNSTABLE WITH MLCAPES TO 3000
J/KG.  COUPLED WITH LAPSE RATES TO 7C/KM...THUNDERSTORMS WILL
BECOME INCREASINGLY WIDESPREAD THIS AFTERNOON WITH POTENTIAL FOR
DAMAGING WINDS IN WET MICROBURSTS ALONG WITH LARGE HAIL.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600.  MEAN STORM
MOTION VECTOR 02015.


...HALES

345,0853 312,0875 312,0903 345,0882

Severe Thunderstorm Watches in Mississippi, 2002Severe Thunderstorm Watches in Alabama, 2002Every severe thunderstorm watch in 2002

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.