965
FXUS63 KIWX 071159
AFDIWX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
659 AM EST SUN DEC 7 2025
KEY MESSAGES
- SNOW ACCUMULATIONS OF 1 TO 3 INCHES THROUGH THIS AFTERNOON,
WITH LOCALLY HIGHER AMOUNTS UP TO 4 INCHES NEAR LAKE MI. IF
TRAVELLING, EXPECT PERIODS OF LOW VISIBILITY AND SLICK ROADS.
- COLD WIND CHILLS TONIGHT AND MONDAY NIGHT, -15F TO +5F.
- SNOW AND RAIN MIX TUESDAY & WEDNESDAY.
- TURNING VERY COLD LATE THIS WEEK WITH HIGHS IN THE TEENS.
DISCUSSION
ISSUED AT 421 AM EST SUN DEC 7 2025
SNOW WAS JUST REACHING THE AREA WEST OF HIGHWAY 31 EARLY THIS
MORNING AT 4 AM EST. UPSTREAM VISIBILITIES WERE GENERALLY 3/4SM
TO 2SM WITH LOCALLY 1/4SM +SN OVER THE NORTHERN 1/3RD OF IL.
GIVEN THE LATEST SURFACE OBSERVATIONS, INDOT DATA, RADAR
INDICATIONS, OBSERVED SNOWFALL AMOUNTS UPSTREAM, MODEL FORECAST
AND THE LATEST TRENDS, MADE A COUPLE OF GENERALLY MINOR UPDATES
TO THE FORECAST INCLUDING SLIGHTLY HIGHER SNOWFALL AMOUNTS AND A
SLIGHTLY MORE NORTHERN TRACK. THE HEAVIEST SNOW AMOUNTS WILL
FALL NORTH OF HIGHWAY 30 AND WEST OF HIGHWAY 31. NORTHERN
LAPORTE IS EXPECTED TO RECEIVE AROUND 4 INCHES OF SNOW. LIGHTER
AMOUNTS ARE EXPECTED EAST AND SOUTH OF THIS AREA. HAVE HANDLED
THIS SYSTEM WITH A SPECIAL WEATHER STATEMENT.
OTHERWISE, MUCH COLDER AIR WILL SPREAD BACK INTO THE AREA BEHIND
THE SNOW. WINDS SHOULD REMAIN UNDER 10 MPH THROUGH MONDAY WITH
WIND CHILLS FALLING BELOW ZERO TONIGHT AND AROUND ZERO MONDAY
NIGHT. TEMPERATURES SHOULD RECOVER ABOVE FREEZING TUESDAY AND
WEDNESDAY BEFORE ANOTHER SURGE OF COLD AIR BRINGS WIND CHILLS AS
LOW AS -15F FRIDAY AND SATURDAY NIGHTS . CHANCES FOR LIGHT SNOW
WILL CONTINUE THROUGH THE END OF THE WEEK.
AVIATION /12Z TAFS THROUGH 12Z MONDAY/
ISSUED AT 647 AM EST SUN DEC 7 2025
PREDOMINANTLY MVFR/IFR CONDITIONS EXPECTED AT THE TERMINALS
THIS MORNING INTO THE AFTERNOON, WITH LIFR CONDITIONS LIKELY AT
TIMES EARLY IN THE PERIOD. CEILINGS WILL BOUNCE AROUND
700-1500FT THROUGH THE AFTERNOON, WITH A PERIOD OF 500-600 FT
POSSIBLE AT BOTH SITES THIS MORNING. VISIBILITIES SHOULD BE
BETWEEN 1-2 MILES FOR THE MOST PART-THOUGH DURING MORE MODERATE
SNOW WE'VE SEEN VISIBILITIES AROUND 1/2 TO 3/4SM. HAVE TEMPOS
TO COVER THE LOWER-END IFR CEILINGS/LIFR VISIBILITIES THROUGH
15-16Z. FOR THE AFTERNOON HOURS AND EARLY EVENING HAVE
PREDOMINANTLY MVFR CEILINGS/VISIBILITIES AS SNOW TAPERS OFF.
EXPECT A RETURN TO VFR AFTER 00Z. WINDS WILL BE LIGHT
(GENERALLY SE) OR VARIABLE UNTIL THIS AFTERNOON WHEN THEY SHIFT
MORE N-NE BEHIND THE EXITING SYSTEM TO OUR SOUTH.
IWX WATCHES/WARNINGS/ADVISORIES
IN...NONE.
OH...NONE.
MI...NONE.
MARINE...SMALL CRAFT ADVISORY FROM 2 PM THIS AFTERNOON TO 4 AM EST
MONDAY FOR LMZ043-046.
DISCUSSION...SKIPPER
AVIATION...MCD
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