965  
FXUS63 KDVN 182000  
AFDDVN  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE QUAD CITIES IA IL  
200 PM CST WED DEC 18 2024  
   
KEY MESSAGES
 
 
- STRONG CLIPPER THURSDAY TO BRING A CHANCE OF ACCUMULATING  
LIGHT SNOW MAINLY NORTH OF I-80.  
 
- COLDER AND MAINLY DRY FRIDAY AND INTO THE WEEKEND, WITH ABOVE  
NORMAL TEMPERATURES RETURNING NEXT WEEK.  
 

 
   
SHORT TERM /THROUGH THURSDAY/
 
 
ISSUED AT 200 PM CST WED DEC 18 2024  
 
TONIGHT: RIDGE OF HIGH PRESSURE WILL BE OVER THE AREA BUT THEN  
QUICKLY SHIFTS OFF TO THE EAST. ON THE RETURN FLOW, WARM AIR  
ADVECTION KICKS IN SO CLOUDS WILL BE ON THE INCREASE OVERNIGHT.  
LOWS WILL BE IN THE LOWER TO MID 20S.  
 
THURSDAY: THE LATEST OPERATIONAL MODELS GFS, ECMWF, AND  
CANADIAN VERY SIMILAR IN TRACKING A STRONG CLIPPER SYSTEM FROM  
WESTERN ND TO THE IL/WI BORDER BY THURSDAY EVENING. THE NAM IS A  
BIT FARTHER NORTH TAKING THE LOW ACROSS SOUTHERN WI. THIS  
SCENARIO WILL KEEP THE HEAVIEST BAND OF SNOW (5-8 INCHES) WELL  
TO OUR NORTH. IN OUR FORECAST AREA, LIGHT SNOW ACCUMULATIONS OF  
AROUND AN INCH IN NW IL ALONG THE HIGHWAY 20 CORRIDOR, WITH LESS  
THAN ONE-HALF INCH ELSEWHERE ACROSS ROUGHLY OUR NORTHEAST HALF.  
NO PCPN IS EXPECTED IN OUR SW HALF. HIGHS WILL RANGE FROM THE  
LOWER 30S IN FAR NW IL TO THE LOWER 40S SOUTH.  
 

 
   
LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/
 
 
ISSUED AT 200 PM CST WED DEC 18 2024  
 
THURSDAY NIGHT: COLD FRONT SWEEPS ACROSS OUR AREA WITH LIGHT  
SNOW OR FLURRIES GRADUALLY ENDING IN OUR EAST. NORTHWEST WINDS  
WILL BE GUSTING TO 35-40 MPH IN THE WAKE OF THIS FRONT.  
 
FRIDAY THROUGH SATURDAY NIGHT: THIS TIME-FRAME WILL EXPERIENCE  
THE COLDEST TEMPERATURES OF THE NEXT 7 DAYS. HIGHS WILL BE ONLY IN  
THE 20S WITH LOWS MAINLY IN THE LOWER TO MID TEENS.  
 
SUNDAY THROUGH CHRISTMAS DAY: HERE WE GO AGAIN WITH THE ROLLER-  
COASTER RIDE WITH REGARD TO TEMPERATURES. ABOVE NORMAL  
TEMPERATURES WITH HIGHS IN THE UPPER 30S TO MID 40S. GLOBAL  
MODELS BRING ANOTHER CLIPPER ON MONDAY WELL TO OUR NORTH. A WEAK  
COLD FRONT MAY BRING A CHANCE OF RAIN. THE PROSPECTS FOR A  
WHITE CHRISTMAS LOOK SLIM TO NONE.  
 

 
   
AVIATION /18Z TAFS THROUGH 18Z THURSDAY/
 
 
ISSUED AT 1145 AM CST WED DEC 18 2024  
 
POCKETS OF MVFR CIGS INTO THIS EVENING OTHERWISE MAINLY VFR  
CONDS THROUGH THIS TAF CYCLE. GUSTY NW WINDS THIS AFTERNOON  
BECOMING LIGHT AND VARIABLE TONIGHT, THEN GUSTY SOUTH WINDS ON  
THURSDAY. THERE IS A CHANCE FOR LIGHT SNOW NORTH OF I-80  
THURSDAY BUT SHOULD ARRIVE JUST BEYOND THIS TAF PERIOD.  
 

 
   
DVN WATCHES/WARNINGS/ADVISORIES
 
 
IA...NONE.  
IL...NONE.  
MO...NONE.  
 

 
 

 
 
SHORT TERM...HAASE  
LONG TERM...HAASE  
AVIATION...HAASE  
 
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