485  
WWUS20 KWNS 122201  
SEL4  
SPC WW 122201  
IAZ000-MNZ000-WIZ000-130500-  
 
URGENT - IMMEDIATE BROADCAST REQUESTED  
SEVERE THUNDERSTORM WATCH NUMBER 274  
NWS STORM PREDICTION CENTER NORMAN OK  
505 PM CDT THU JUL 12 2018  
 
THE NWS STORM PREDICTION CENTER HAS ISSUED A  
 
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF  
NORTHWEST IOWA  
SOUTHERN MINNESOTA  
WESTERN WISCONSIN  
 
* EFFECTIVE THIS THURSDAY AFTERNOON FROM 505 PM UNTIL MIDNIGHT  
CDT.  
 
* PRIMARY THREATS INCLUDE...  
SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2  
INCHES IN DIAMETER POSSIBLE  
SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE  
 
SUMMARY...THUNDERSTORMS ARE DEVELOPING ALONG A COLD FRONT EXTENDING  
ACROSS SOUTH-CENTRAL MN INTO WESTERN WI. A FEW OF THESE STORMS WILL  
POSE A RISK OF LOCALLY DAMAGING WIND GUSTS AND HAIL THROUGH THE  
EVENING.  
 
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50  
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST OF  
WORTHINGTON MN TO 50 MILES EAST NORTHEAST OF EAU CLAIRE WI. FOR A  
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE  
UPDATE (WOUS64 KWNS WOU4).  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
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 273...  
 
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 500. MEAN STORM MOTION VECTOR  
28025.  
 
...HART  
 
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