Severe Thunderstorm Watch 596

Issued

Aug 11, 2002, 9:55 PM CDT (02:55 UTC)

Expired

Aug 12, 2002, 3:00 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

The Sioux Falls radar (KFSD), 64 km from the middle of the area, began a volume at 02:55 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 120252
SEL6  
SPC WW 120255
IAZ000-MNZ000-NEZ000-SDZ000-120800-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 596
STORM PREDICTION CENTER NORMAN OK
955 PM CDT SUN AUG 11 2002

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

   NORTHWEST IOWA                               
   SOUTHERN AND CENTRAL MINNESOTA                          
   NORTHEAST NEBRASKA                           
   SOUTHEAST SOUTH DAKOTA                       

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 955 PM UNTIL
300 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
EAST AND WEST OF A LINE FROM 40 MILES SOUTH SOUTHEAST OF YANKTON
SOUTH DAKOTA TO 35 MILES NORTH NORTHEAST OF SAINT CLOUD MINNESOTA.

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 591...WW 592...WW
593...WW 594...WW 595...

DISCUSSION...LINE OF STRONG/SEVERE THUNDERSTORMS OVER EASTERN SD
WILL CONTINUE TO TRACK EASTWARD ACROSS SOUTHERN MN/NORTHWEST IA FOR
THE NEXT SEVERAL HOURS.  DAMAGING WINDS WILL BE LIKELY WITH
STRONGER CELLS/BOWS.  POTENTIAL ALSO EXISTS FOR NEW DEVELOPMENT
SOUTHWARD ALONG COLD FRONT OVER CENTRAL SD.  THIS ACTIVITY COULD
AFFECT PARTS OF NORTHEAST NEB IN A FEW HOURS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 27040.

...HART

460,0922 422,0954 422,0982 460,0950

Severe Thunderstorm Watches in Minnesota, 2002Severe Thunderstorm Watches in Iowa, 2002Severe Thunderstorm Watches in South Dakota, 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.