367  
FXUS63 KMKX 152057  
AFDMKX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI  
257 PM CST SUN DEC 15 2024  
   
KEY MESSAGES  
 
- DENSE FOG REMAINS A CONCERN OVER SOUTH CENTRAL WISCONSIN, BUT  
MAY EXPAND BACK TO THE EAST THIS EVENING/TONIGHT. CONFIDENCE  
IN EVOLUTION REMAINS LOW.  
 
- LOW CLOUDS AND DRIZZLE OVERNIGHT AND MONDAY MORNING, THEN TURNING  
BREEZY MONDAY AFTERNOON.  
 
- COOLER MID TO LATE WEEK, WITH 30-40 PERCENT CHANCES FOR SNOW.  
 
 
   
SHORT TERM  
 
ISSUED 257 PM CST SUN DEC 15 2024  
 
TONIGHT THROUGH MONDAY NIGHT:  
 
LOW CLOUDS AND FOG REMAIN IN PLACE ACROSS THE REGION THIS  
AFTERNOON, WITH AREAS OF DENSE FOG, ESPECIALLY ALONG AND WEST OF  
I-39/90 AND HIGHWAY 26. A DENSE FOG ADVISORY IS IN EFFECT FOR  
THIS AREA INTO THE MID MORNING HOURS TOMORROW, WITH THE  
EXPECTATION THAT FOG WILL EXPAND/BECOME MORE DENSE OVERNIGHT.  
TO THE EAST, IT'S POSSIBLE THAT FOG FILLS BACK IN TONIGHT AS  
WELL, BUT THIS CHANCE IS MORE UNCERTAIN.  
 
WARM/MOIST ADVECTION WILL INCREASE OVERNIGHT AHEAD OF A COLD  
FRONT, WHICH WILL PASS THROUGH THE AREA TOMORROW. ALONG WITH THE  
FOG POTENTIAL, PATCHY DRIZZLE AND A FEW SHOWERS ARE EXPECTED  
OVERNIGHT, WITH THE BEST CHANCES OVER SOUTHEASTERN WISCONSIN.  
 
WINDS TURN WESTERLY MONDAY AND WILL BECOME RATHER BREEZY BY  
AFTERNOON AND EVENING. HIGHS TOMORROW WILL BE IN THE LOW TO MID  
40S, WITH LOWS TOMORROW NIGHT FALLING INTO THE MID TO UPPER 20S.  
 
BOXELL  
 
 
   
LONG TERM  
 
ISSUED 257 PM CST SUN DEC 15 2024  
 
TUESDAY THROUGH SUNDAY:  
 
QUIET CONDITIONS ARE EXPECTED ON TUESDAY AS SURFACE RIDGING  
MOVES THROUGH THE AREA. A PASSING TROUGH WILL BRING CHANCES  
(30-40 PERCENT) FOR LIGHT SNOW TO THE AREA TUESDAY NIGHT, THOUGH  
QPF TRENDS HAVE BEEN DISTINCTLY DOWNWARD OVER THE LAST 24  
HOURS.  
 
WEDNESDAY WILL BE CHILLY AND BREEZY, WITH HIGHS IN THE UPPER 20S  
TO AROUND 30. A MORE INTERESTING CLIPPER SYSTEM THEN MOVES  
THROUGH THE REGION THURSDAY AND THURSDAY NIGHT. RIGHT NOW THIS  
LOOKS LIKE IT WILL HAVE ENOUGH MOISTURE TO PUT DOWN A SWATH OF  
SNOW, BUT THERE IS A WIDE RANGE OF POTENTIAL SYSTEM TRACKS--  
ANYWHERE FROM NORTHERN ILLINOIS TO THE UP OF MICHIGAN--AT THIS  
DISTANCE. WILL KEEP AN EYE ON TRENDS OVER THE NEXT FEW DAYS.  
 
COLDER AIR LOOKS TO FOLLOW THIS SYSTEM FOR THE WEEKEND.  
 
BOXELL  
 
 
   
AVIATION  
 
ISSUED 257 PM CST SUN DEC 15 2024  
 
IFR AND LIFR CONDITIONS WILL PREVAIL THROUGH THE OVERNIGHT  
HOURS, THOUGH VISIBILITIES IN PARTICULAR MAY BOUNCE AROUND A  
BIT. WINDS WILL BE LIGHT FROM THE SOUTH THROUGH THE NIGHT. AREAS  
OF FOG AND DRIZZLE WILL CONTRIBUTE TO THE VISIBILITY  
REDUCTIONS.  
 
BOXELL  
 
 
   
MARINE  
 
ISSUED 257 PM CST SUN DEC 15 2024  
 
PATCHY DENSE FOG WILL CONTINUE OVERNIGHT ACROSS THE SOUTHERN HALF  
OF THE OPEN WATERS, AS SOUTHERLY WINDS GRADUALLY INCREASE THROUGH  
THE EVENING AND NIGHT. ON MONDAY, LOW PRESSURE WILL TRACK  
ACROSS ONTARIO WHILE STRENGTHENING. THE ASSOCIATED COLD FRONT  
WILL CROSS LAKE MICHIGAN MIDDAY MONDAY, WITH SOUTH WINDS AHEAD  
OF THE FRONT MONDAY MORNING TURNING WESTERLY AND BECOMING GUSTY  
BEHIND THE FRONT MONDAY NIGHT. A FEW GALE FORCE GUSTS ARE  
POSSIBLE MONDAY NIGHT AND EARLY TUESDAY MORNING OVER THE OPEN  
WATERS. WEST WINDS TAPER OFF INTO TUESDAY AS LOW PRESSURE  
DEPARTS AND HIGH PRESSURE BUILDS IN.  
 
DENSE FOG ADVISORIES REMAIN IN EFFECT OVERNIGHT FOR THE  
NEARSHORE AND SOUTHERN HALF OF THE OPEN WATERS. A SMALL CRAFT  
ADVISORY IS ALSO IN EFFECT FOR AREAS NORTH OF PORT WASHINGTON  
THROUGH MID DAY MONDAY. WAVES IN THIS AREA WILL BRIEFLY DIMINISH  
THIS AFTERNOON, BEFORE INCREASING AGAIN OVERNIGHT INTO EARLY  
MONDAY MORNING.  
 
BOXELL  
 
 
   
MKX WATCHES/WARNINGS/ADVISORIES  
 
WI...DENSE FOG ADVISORY...WIZ046-WIZ047-WIZ056-WIZ057-WIZ062-WIZ063-  
WIZ067-WIZ068 UNTIL 9 AM MONDAY.  
 
LM...DENSE FOG ADVISORY...LMZ080-LMZ669-LMZ671-LMZ673-LMZ675-LMZ777-  
LMZ779-LMZ870-LMZ872-LMZ874-LMZ876-LMZ878 UNTIL 9 AM  
MONDAY.  
 
SMALL CRAFT ADVISORY...LMZ643 UNTIL NOON MONDAY.  
 
DENSE FOG ADVISORY...LMZ644-LMZ645-LMZ646 UNTIL 9 AM MONDAY.  
 
SMALL CRAFT ADVISORY...LMZ644-LMZ645-LMZ646 UNTIL 3 PM SUNDAY.  
 
 
 
 
 
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