361
FXUS63 KARX 232311
AFDARX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
611 PM CDT WED SEP 23 2026
KEY MESSAGES
- FOG POSSIBLE IN CENTRAL AND SOUTHWEST WISCONSIN TONIGHT.
- SMALL RAIN CHANCES ON THURSDAY AND THURSDAY EVENING. MAINLY
WEST OF HIGHWAY 52 IN NORTHEAST IOWA AND SOUTHEAST MINNESOTA.
- RAIN CHANCES FROM FRIDAY INTO THE WEEKEND ARE LOWERING.
- BETTER RAIN CHANCES FROM TUESDAY INTO WEDNESDAY.
DISCUSSION
ISSUED AT 108 PM CDT WED SEP 23 2026
TONIGHT
LIGHT WINDS NEAR THE SURFACE UNDERNEATH A SUBSIDENCE INVERSION
IN SOUTHWEST AND CENTRAL WISCONSIN WILL RESULT IN THE
DEVELOPMENT OF FOG OVERNIGHT TONIGHT AND ON WEDNESDAY MORNING.
ELSEWHERE, SKIES WILL BE PARTLY TO MOSTLY CLOUDY.
LOW TEMPERATURES WILL RANGE FROM THE LOWER 40S TO LOWER 50S.
THE COLDEST TEMPERATURES WILL BE FOUND IN CENTRAL AND NORTH-
CENTRAL WISCONSIN.
THURSDAY AND THURSDAY EVENING
A SHORTWAVE TROUGH WILL MOVE NORTHEAST THROUGH THE UPPER
MISSISSIPPI RIVER VALLEY. THIS TROUGH WILL BE MOVING INTO DRIER
AIR AND INCREASING SUBSIDENCE AS IT MOVES INTO A RIDGE OVER THE
GREAT LAKES. AS A RESULT, THE BETTER CHANCES OF RAIN (20-40
PERCENT) WILL BE WEST OF HIGHWAY 52 IN NORTHEAST IOWA AND
SOUTHEAST MINNESOTA.
HIGH TEMPERATURES WILL BE IN THE MID- TO UPPER 60S. LOW
TEMPERATURES WILL RANGE FROM THE MID-40S TO MID-50S.
FRIDAY INTO THE WEEKEND
ANOTHER SHORTWAVE TROUGH WILL MOVE SLOWLY NORTHEAST THROUGH THE
UPPER MISSISSIPPI RIVER VALLEY FROM FRIDAY INTO THE UPCOMING
WEEKEND. LIKE ITS PREDECESSOR, IT WILL BE MOVING INTO A RIDGE
OVER THE GREAT LAKES. AS A RESULT, THE MODELS HAVE BEEN
GRADUALLY LOWERING RAINFALL AMOUNTS AND RAIN CHANCES.
HIGH TEMPERATURES RANGE FROM THE LOWER 60S TO LOWER 70S. LOW
TEMPERATURES WILL RANGE FROM THE MID-40S TO MID-50S.
TUESDAY INTO WEDNESDAY
A LONGWAVE TROUGH WILL MOVE EAST THROUGH THE MID- AND UPPER
MISSISSIPPI RIVER VALLEY. THIS WILL BRING RAIN INTO THE REGION.
THERE ARE SOME MODELS THAT BRING TROPICAL MOISTURE NORTHWARD
INTO THE REGION. MEANWHILE, OTHER MODELS SHOW THAT THIS PLUME OF
TROPICAL MOISTURE WILL BE SOUTHEAST OF THE AREA.
HIGH TEMPERATURES WILL BE IN THE MID- TO UPPER 60S. LOW
TEMPERATURES WILL RANGE FROM THE MID-40S TO MID-50S.
AVIATION /00Z TAFS THROUGH 00Z FRIDAY/
ISSUED AT 612 PM CDT WED SEP 23 2026
AS THE NOCTURNAL INVERSION DEVELOPS TONIGHT, LIGHT WINDS WILL
REMAIN NEAR THE SURFACE. THIS WILL RESULT IN THE DEVELOPMENT OF
SOME IFR/MVFR FOG IN SOUTHWEST AND WEST-CENTRAL WISCONSIN
BETWEEN 23.06Z AND 23.15Z.
SHOWERS WILL MOVE INTO PARTS OF NORTHEAST IOWA AND SOUTHEAST
MINNESOTA AFTER 24.21Z. THESE SHOWERS WILL BE MAINLY WEST OF
HIGHWAY 52. NO VISIBILITY OR CEILING ISSUES ARE EXPECTED.
ARX WATCHES/WARNINGS/ADVISORIES
WI...NONE.
MN...NONE.
IA...NONE.
DISCUSSION...BOYNE
AVIATION...BOYNE
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