Severe Thunderstorm Watch 554

Issued

Jul 30, 2002, 3:40 PM CDT (20:40 UTC)

Expired

Jul 30, 2002, 9:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

The Minneapolis radar (KMPX), 133 km from the middle of the area, began a volume at 20:42 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 302042
SEL4  
SPC WW 302040
IAZ000-MNZ000-NEZ000-SDZ000-WIZ000-310200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 554
STORM PREDICTION CENTER NORMAN OK
340 PM CDT TUE JUL 30 2002

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

   NORTHERN IOWA                               
   SOUTHERN MINNESOTA                          
   EXTREME NORTHEAST NEBRASKA                           
   SOUTHEAST SOUTH DAKOTA                       
   WESTERN WISCONSIN                          

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 340 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 40 MILES SOUTH SOUTHWEST OF SIOUX
FALLS SOUTH DAKOTA TO 40 MILES EAST SOUTHEAST 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...SCATTERED THUNDERSTORMS ARE EXPECTED TO INTENSIFY IN
THE NEXT 1-2 HOURS ACROSS PARTS OF EASTERN SD AND SOUTHERN MN. 
VERY MOIST/UNSTABLE AIRMASS IN THIS REGION...COUPLED WITH
SUFFICIENT VERTICAL SHEAR FOR SUPERCELL STORMS WILL PROMOTE THE
POTENTIAL FOR LARGE HAIL AND DAMAGING WINDS IN STRONGER CELLS.

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 27035.

...HART

435,0970 453,0904 434,0904 421,0970

Severe Thunderstorm Watches in Minnesota, 2002Severe Thunderstorm Watches in Iowa, 2002Severe Thunderstorm Watches in Wisconsin, 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.