Severe Thunderstorm Watch 263

Issued

May 11, 2000, 5:00 AM CDT (10:00 UTC)

Expired

May 11, 2000, 11:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

000 
WWUS9 KMKC 110945
MKC WW 110938
IAZ000-MNZ000-WIZ000-111600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 263
STORM PREDICTION CENTER NORMAN OK
438 AM CDT THU MAY 11 2000

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

   NORTHERN IOWA                               
   SOUTHERN MINNESOTA                          
   WESTERN WISCONSIN                          

EFFECTIVE THIS THURSDAY MORNING FROM 500 AM UNTIL 1100 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 85 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF WORTHINGTON
MINNESOTA TO 15 MILES NORTH OF CAMP DOUGLAS WISCONSIN.

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.

OTHER WATCH INFORMATION...  CONTINUE...WW 262...

DISCUSSION...THUNDERSTORMS SHOULD CONTINUE TO INCREASE IN
COVERAGE/INTENSITY IN AREA OF STRONG WARM ADVECTION/850 MB MOISTURE
INFLUX OVER THE UPR MS VLY.  MOST OF THE STORMS...ESPECIALLY IN ERN
PART OF WW...SHOULD BE ELEVATED SO THAT MAIN THREAT WILL BE HAIL.
STORMS IN WRN PART OF WW WILL BE ROOTED CLOSER TO THE SURFACE AND
WILL HAVE MORE AMPLE BUOYANCY TO TAP /ESTD CAPE AOA 2000 J/KG/. 
THREAT WILL EXIST FOR ROTATING STORMS WITH BOTH LARGE HAIL AND
DAMAGING WINDS. 

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 24035.

...CORFIDI

;425,0901 422,0962 445,0962 452,0901;

Severe Thunderstorm Watches in Minnesota, 2000Severe Thunderstorm Watches in Iowa, 2000Severe Thunderstorm Watches in Wisconsin, 2000Every severe thunderstorm watch in 2000

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.