841
FXUS63 KMKX 221845
AFDMKX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
145 PM CDT TUE SEP 22 2026
KEY MESSAGES
- HIGH SWIM RISK CONDITIONS CONTINUE INTO EARLY WEDNESDAY
EVENING FOR ALL BEACHES ALONG LAKE MICHIGAN.
- SLIGHTLY BELOW NORMAL TEMPS CONTINUE FOR MUCH OF THE WEEK.
SHORT TERM
ISSUED 145 PM CDT TUE SEP 22 2026
THIS AFTERNOON THROUGH WEDNESDAY NIGHT:
700 MB DRYING FROM THE EAST WILL END MUCH OF THE SHOWERS THIS
AFTERNOON WHILE THE UPPER LOW SLOWLY TRACKS ACROSS NRN IL INTO
TNT, REACHING THE IN AND OH BORDER BY 18Z WED. MOSTLY CLOUDY
SKIES WILL CONTINUE TODAY FOR MUCH OF SRN WI VIA STRATOCUMULUS
FROM LOW LEVEL INSTABILITY OR MID LEVEL CLOUDS FROM THE UPPER
LOW. THERE WILL BE SOME CLEARING TREND TNT, BUT STRATUS MAY
DEVELOP AFTER 06Z DUE TO THE ARRIVAL OF INCREASED LOW LEVEL
MOISTURE ON ELY WINDS. THE STRATUS COULD THEN CONTINUE THROUGH
WED AM THEN SCATTER IN THE AFTERNOON. A COL WILL THEN SETTLE
OVER SRN WI LATER WED AND WED NT WITH FAIR WEATHER EXPECTED. A
LITTLE MORE SUNSHINE WED SHOULD BOOST HIGH TEMPS A BIT FROM
TODAY.
GEHRING
LONG TERM
ISSUED 145 PM CDT TUE SEP 22 2026
THURSDAY THROUGH TUESDAY:
THE WEST TO EAST SURFACE RIDGE WILL CONTINUE TO RESIDE FROM THE
NRN GREAT LAKES TO SRN QUEBEC THROUGH FRI NT. THIS WILL MAINTAIN
RELATIVELY COOL ELY WINDS AND HIGH RELATIVE HUMIDITY OVER SRN
WI. LOWS IN THE 40S AND 50S AND HIGHS IN THE MIDDLE TO UPPER 60S
ARE FORECAST. THE SRN PERIPHERY OF A SHORTWAVE TROUGH MOVING
ACROSS ONTARIO MAY TRAVERSE ACROSS CENTRAL AND SRN WI THU
AFTERNOON AND NIGHT BUT ONLY MID TO HIGH CLOUDS ARE EXPECTED AT
THIS TIME.
A NARROW UPPER RIDGE WILL THEN BUILD INTO THE REGION FOR FRI-FRI NT
FOLLOWED BY A WEAK AND SLOW MOVING SHORTWAVE TROUGH THAT WILL ATTEMPT
TO RUN THROUGH THE RIDGE OVER WI FOR SAT NT-SUN. RAIN CHANCES ARE
20-40 PERCENT OVER SOUTH CENTRAL WI SAT NT, THEN 20 PERCENT ON
SUN. UPPER RIDGING AND WARMING TEMPS WILL THEN RETURN FOR EARLY
NEXT WEEK. HOWEVER, 30-40 PERCENT CHANCES FOR SHOWERS ARE
FORECAST ON TUE WHEN THE UPPER RIDGE SHIFTS EWD.
GEHRING
AVIATION
ISSUED 145 PM CDT TUE SEP 22 2026
LOCAL MVFR CIGS THIS AFTERNOON THEN VFR THIS EVENING. MORE
STRATUS AND MVFR CIGS MAY THEN DEVELOP OVER MUCH OF SRN WI AFTER
06Z AS INCREASED MOISTURE ARRIVES FROM THE EAST. THE STRATUS
AND MVFR CIGS WOULD CONTINUE THROUGH WED AM AND POSSIBLY LINGER
INTO THE EARLY AFTERNOON.
GEHRING
MARINE
ISSUED 145 PM CDT TUE SEP 22 2026
HIGH PRESSURE AROUND 30.6 INCHES WILL LARGELY REMAIN IN PLACE TO
THE NORTHEAST OF THE GREAT LAKES REGION THROUGH WEDNESDAY EVENING.
GUSTY EAST NORTHEAST WINDS ARE EXPECTED DURING THIS TIME. WINDS
LOOK TO GRADUALLY DIMINISH AND TURN EAST SOUTHEASTERLY TOWARD
THE END OF THE WEEK, AS THE HIGH PRESSURE SYSTEM SLOWLY WEAKENS.
A SMALL CRAFT ADVISORY CONTINUES FROM SHEBOYGAN TO WINTHROP
HARBOR UNTIL 7 PM CDT WEDNESDAY.
GEHRING
MKX WATCHES/WARNINGS/ADVISORIES
WI...BEACH HAZARDS STATEMENT...WIZ052-WIZ060-WIZ066-WIZ071-WIZ072
UNTIL 7 PM WEDNESDAY.
LM...SMALL CRAFT ADVISORY...LMZ643-LMZ644-LMZ645-LMZ646 UNTIL 7 PM
WEDNESDAY.
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