Tornado Watch 208

Issued

Apr 27, 1997, 10:00 AM CDT (15:00 UTC)

Expired

Apr 27, 1997, 4:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

162 
WWUS9 KMKC 271432
SEL8  
MKC WW 271432
LAZ000-MSZ000-272100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 208
STORM PREDICTION CENTER NORMAN OK
932 AM CDT SUN APR 27 1997

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

   SOUTHEAST LOUISIANA                          
   SOUTHERN MISSISSIPPI                        
   AND ADJACENT COASTAL WATERS

EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 1000 AM UNTIL 400
PM CDT.

TORNADOES...HAIL TO 1 3/4 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 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 55 MILES SOUTH OF HOUMA LOUISIANA TO 30 MILES EAST
OF JACKSON MISSISSIPPI.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO WATCH
NUMBER 206.  WATCH NUMBER 206 WILL NOT BE IN EFFECT AFTER 1000 AM
CDT.  

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.

DISCUSSION...LINE OF LOCALLY SEVERE THUNDERSTORMS IS MOVING NORTH-
NORTHEASTWARD INTO SOUTHEAST LOUISIANA IN ASSOCIATION WITH WARM
FRONT ALONG THE CENTRAL GULF COAST.  STORMS HAVE FORMED WITHIN MID
AND UPPER LEVEL DRY INTRUSION NOTED IN SATELLITE WATER VAPOR
IMAGERY.  12Z SOUNDING AND CURRENT VAD WINDS FROM SIL INDICATE 50
KT SOUTHERLY LOW LEVEL JET ABOVE SURFACE LAYER WINDS THAT HAVE
SUBSTANTIAL EASTERLY COMPONENT...CREATING FAVORABLE VERTICAL
SHEAR/HELICITY FOR POSSIBLE SUPERCELLS.  STORM-RELATIVE WINDS ALSO
SUGGEST POTENTIAL FOR ISOLATED TORNADO DEVELOPMENT...ESPECIALLY
NEAR THE WARM FRONT WHERE COMBINATION OF SHEAR AND INSTABILITY IS
MAXIMIZED.    

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 3/4 INCHES.  EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500.  MEAN STORM MOTION VECTOR 21040.


...WEISS

284,0915 321,0905 321,0881 284,0892

Tornado Watches in Mississippi, 1997Tornado Watches in Louisiana, 1997Every tornado watch in 1997

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.