Severe Thunderstorm Watch 396

Issued

Jun 7, 2002, 4:00 PM CDT (21:00 UTC)

Expired

Jun 7, 2002, 9:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

The Minneapolis radar (KMPX), 82 km from the middle of the area, began a volume at 21:02 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.

000 
WWUS20 KWNS 072044
SEL6  
SPC WW 072040
IAZ000-MNZ000-WIZ000-080200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 396
STORM PREDICTION CENTER NORMAN OK
340 PM CDT FRI JUN 7 2002

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

   NORTHERN IOWA                               
   SOUTHERN MINNESOTA                          
   WESTERN WISCONSIN                          

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 400 PM UNTIL 900
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 60 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF WORTHINGTON
MINNESOTA TO 25 MILES EAST OF EAU CLAIRE 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.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.


DISCUSSION...CONVERGENCE ALONG E/W FRONTAL BOUNDARY WILL INITIATE
SEVERE THUNDERSTORMS AS AIR MASS BECOMES INCREASINGLY UNSTABLE
REMAINDER OF AFTERNOON.  30-40 KT OF DEEP LAYER SHEAR SUFFICIENT
FOR STORM ORGANIZATION LEADING TO LARGE HAIL AND EVENTUALLY
DAMAGING WIND POTENTIAL AS SHORT LINES/BOWS FORM.


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 550.  MEAN STORM
MOTION VECTOR 24035.


...HALES

443,0962 454,0905 440,0905 424,0962

Severe Thunderstorm Watches in Minnesota, 2002Severe Thunderstorm Watches in Wisconsin, 2002Severe Thunderstorm Watches in Iowa, 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; radar from the NEXRAD Level II archive.