930  
WWUS20 KWNS 042032  
SEL8  
SPC WW 042032  
ILZ000-KSZ000-MOZ000-050300-  
 
URGENT - IMMEDIATE BROADCAST REQUESTED  
SEVERE THUNDERSTORM WATCH NUMBER 518  
NWS STORM PREDICTION CENTER NORMAN OK  
235 PM CST MON DEC 4 2017  
 
THE NWS STORM PREDICTION CENTER HAS ISSUED A  
 
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF  
EXTREME WEST CENTRAL ILLINOIS  
EXTREME SOUTHEAST KANSAS  
MUCH OF SOUTHWEST, CENTRAL AND NORTHEAST MISSOURI  
 
* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 235 PM UNTIL  
900 PM CST.  
 
* PRIMARY THREATS INCLUDE...  
SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE  
ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE  
A TORNADO OR TWO POSSIBLE  
 
SUMMARY...THUNDERSTORMS ARE BEGINNING TO FORM ALONG A COLD FRONT,  
AND THESE STORMS WILL INCREASE IN COVERAGE AND STRENGTHEN GRADUALLY  
THROUGH THE AFTERNOON/EVENING WHILE SPREADING EASTWARD. EMBEDDED  
SUPERCELLS AND/OR BOWING SEGMENTS COULD PRODUCE DAMAGING WINDS, AS  
WELL AS A BRIEF TORNADO AND MARGINALLY SEVERE HAIL.  
 
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60  
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES EAST NORTHEAST  
OF KIRKSVILLE MO TO 25 MILES SOUTHWEST OF SPRINGFIELD MO. FOR A  
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE  
UPDATE (WOUS64 KWNS WOU8).  
 
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.  
 

 
 
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO  
1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW  
CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR  
24045.  
 
...THOMPSON  
 
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