Tornado Watch 818

Issued

Nov 24, 2001, 9:30 AM CST (15:30 UTC)

Expired

Nov 24, 2001, 3:00 PM CST

In force

6 hr

Issued by

the Storm Prediction Center

000 
WWUS20 KWNS 241519
SEL8  
SPC WW 241512
ALZ000-MSZ000-242100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 818
STORM PREDICTION CENTER NORMAN OK
912 AM CST SAT NOV 24 2001

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

NORTHERN AND WESTERN ALABAMA                            
EASTERN MISSISSIPPI                        

EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 930 AM UNTIL 300
PM CST.

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

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

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 816.  WATCH NUMBER 816 WILL NOT BE IN EFFECT AFTER 930 AM
CST.  CONTINUE...WW 817...

DISCUSSION...PRE-FRONTAL SQUALL LINE CONTINUES TO MOVE EWD ACROSS
MS...WITH ADDITIONAL CONVECTION DEVELOPING IN THE WARM SECTOR EAST
OF THE SQUALL LINE.  TEMPERATURES IN THE 70S AND BOUNDARY LAYER DEW
POINTS OF 66-70 F WILL SUPPORT MODERATE SURFACE-BASED INSTABILITY
...WHILE LOW-MID LEVEL SHEAR WILL REMAIN STRONG.  THE PRIMARY
THREATS WILL BE TORNADOES AND ISOLATED LARGE HAIL WITH SUPERCELLS
E OF THE SQUALL LINE...AND DAMAGING WINDS AND AN ISOLATED TORNADO
WITH THE LINE.

AVIATION...TORNADOES AND 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 500. 
MEAN STORM MOTION VECTOR 23035.


...THOMPSON

345,0853 312,0874 312,0902 345,0882

Tornado Watches in Alabama, 2001Tornado Watches in Mississippi, 2001Every tornado watch in 2001

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.