029
FXUS63 KMKX 201218
AFDMKX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
718 AM CDT TUE OCT 20 2026
KEY MESSAGES
- AREAS OF FOG LOOK POSSIBLE AGAIN TONIGHT, MAINLY OVER EAST
CENTRAL AND SOUTHEAST WISCONSIN. THIS FOG MAY BECOME DENSE IN
TIME FOR THE MORNING COMMUTE.
- MARINE DENSE FOG IN THE NEARSHORE WATERS EARLY THIS MORNING.
- DRY WITH A GRADUAL WARMING TREND THROUGH NEXT WEEKEND.
UPDATE
ISSUED 650 AM CDT TUE OCT 20 2026
DENSE FOG ADVISORY REMAINS IN EFFECT FOR NORTHERN AND EASTERN
PORTIONS OF THE CWA AS OVERNIGHT FOG DEVELOPED ACROSS PARTS OF
THE AREA WHERE CONDITIONS FROM CAMERAS AND OBSERVATIONS WERE
SUCH THAT FOG WAS BECOMING WIDESPREAD AND DENSE. AS THE SUN
COMES UP DENSE FOG WILL GRADUALLY DISSIPATE, MOST DISSIPATING BY
9AM CDT BUT FULLY DISSIPATING BY 10AM. IT REMAINS POSSIBLE A 1
HOUR EXTENSION OF THE DENSE FOG ADVISORY MAY BE NEEDED.
OTHERWISE, HIGH PRESSURE REMAINS IN PLACE AND ONCE FOG CLEAR
CONDITIONS WILL BE MOSTLY CLEAR AND QUIET THE REST OF THE DAY.
SOME ADDITIONAL FOG POTENTIAL AGAIN TONIGHT BUT APPEARS LIKELY
TO BE LESS WIDESPREAD AND IMPACTFUL THAN THIS MORNING.
KUROSKI
SHORT TERM
ISSUED 1118 PM CDT MON OCT 19 2026
CURRENT OVERNIGHT THROUGH WEDNESDAY NIGHT:
SHORT RANGE GUIDANCE CONTINUES TO HONE IN ON THE POTENTIAL FOR
FOG OVERNIGHT, MAINLY EAST OF WHERE A LAKE BREEZE PUSHED INLAND
THIS PAST AFTERNOON.
HIGH CLOUDS CONTINUE TO EXIT AND MOSTLY CLEAR SKIES WILL PREVAIL
OVERNIGHT. THIS, IN ADDITION TO SUBSIDENCE OVERHEAD, LIGHT
WINDS, AND LAKE MODIFIED AIR AT THE SURFACE, SHOULD ALLOW FOR
AREAS OF FOG TO FORM EAST OF SAID LAKE BREEZE BOUNDARY, MAINLY
OVER THE EASTERN HALF OF THE CWA. GUIDANCE SHOWS THE POTENTIAL
FOR THIS FOG TO BECOME DENSE IN SPOTS JUST IN TIME FOR THE
MORNING COMMUTE. THE FOG MAY THEN LINGER UNTIL 9 OR 10AM GIVEN
THE LOWER SUN ANGLE AND WEAKER MIXING THIS TIME OF THE YEAR.
VISIBILITY TRENDS WILL BE MONITORED FOR EITHER AN SPS OR A DENSE
FOG ADVISORY DURING THE EARLY MORNING HOURS. CAUTIOUS TRAVEL IS
ADVISED IN ANY FOG THAT DEVELOPS.
AFTER FOG DISSIPATES LATE THIS MORNING, EXPECT MOSTLY CLEAR
SKIES THROUGH THE AFTERNOON HOURS INTO THE EVENING. HIGHS WILL
BE IN THE MID TO UPPER 60S. WITH LIGHT EAST TO SOUTHEAST WINDS
PREVAILING OFF OF THE LAKE, AREAS OVER EAST CENTRAL WI WILL BE
A BIT COOLER.
A FOG WILL AGAIN BE POSSIBLE TONIGHT INTO WEDNESDAY MORNING,
MAINLY ALONG THE SPINE OF THE KETTLE MORAINE AND EAST TO THE
LAKE MICHIGAN SHORELINE OWING TO PERSISTENT WEATHER CONDITIONS
PREVAILING INTO WEDNESDAY MORNING.
SOUTHWESTERLY WINDS WILL BOLSTER TEMPERATURES SLIGHTLY ON
WEDNESDAY WITH HIGHS IN THE UPPER 60S TO LOW 70S WITH CONTINUED
FAIR WEATHER.
CMILLER
LONG TERM
ISSUED 1123 PM CDT MON OCT 19 2026
THURSDAY THROUGH MONDAY:
A VERY QUIET EXTENDED PERIOD IS IN STORE AS HIGH PRESSURE WILL
REMAIN IN PLACE OVER THE EASTERN HALF OF THE US AND AN UPPER
LEVEL RIDGE BUILDS OVER THE GREAT PLAINS. THE RIDGE TO OUR WEST
WILL RESULT IN HIGH TEMPERATURES IN THE UPPER 60S TO NEAR 70
WEDNESDAY THROUGH SUNDAY. THERE IS SOME POTENTIAL HIGHS MAY
EVEN OVERSHOOT THOSE MARKS, GIVEN YESTERDAY ALREADY OVERSHOT
GUIDANCE FROM THE NBM.
THE EXTENDED PERIOD WILL REMAIN MOSTLY DRY, SAVE FOR 10 TO 15%
CHANCES FOR RAIN ALONG A COLD FRONT OVER CENTRAL WI SUNDAY NIGHT
INTO MONDAY.
IT DOES LOOK LIKE MORE FALL-LIKE TEMPERATURES WILL RETURN
FOLLOWING THE COLD FRONT ON MONDAY
CMILLER
AVIATION
ISSUED 700 AM CDT TUE OCT 20 2026
QUARTER MILE VSBYS WIDESPREAD ACROSS EAST CENTRAL AND SOUTHEAST
WISCONSIN THIS MORNING. FOG WILL GRADUALLY DISSIPATE AS THE SUN
COMES UP AND BEGINS TO WARM THINGS UP. EXPECT DENSE FOG TO
CONTINUE FOR THE NEXT COUPLE HOURS LIKELY COMPLETELY DISSIPATING
BY 10AM. QUIET VFR CONDITIONS RETURN THEREAFTER. SOME ADDITIONAL
FOG POTENTIAL TONIGHT THOUGH IT WOULD LIKELY BE RESTRICTED TO
FAR EASTERN WI AND OVERALL SEEMS LIKELY TO BE LESS EXPANSIVE AND
DENSE.
KUROSKI
MARINE
ISSUED 1123 PM CDT MON OCT 19 2026
HIGH PRESSURE CENTERED OVER THE UPPER GREAT LAKES REGION WILL
SLOWLY DRIFT EAST THROUGH WEDNESDAY, WITH ANOTHER AREA OF HIGH
PRESSURE MOVING IN FROM THE GREAT PLAINS LATER THIS WEEK. WINDS
WILL REMAIN LIGHT TO MODERATE THROUGH THE WEEK. EAST WINDS WILL
PREVAIL TUESDAY, SOUTHERLY WINDS ON WEDNESDAY, AND LIGHT AND
VARIABLE WINDS ON THURSDAY. BREEZY SOUTHERLIES MAY FINALLY
RETURN SATURDAY AS LOW PRESSURE MOVES THROUGH THE CENTRAL PLAINS
OF CANADA TOWARD HUDSON BAY.
LOCALLY, SOME MARINE FOG IS POSSIBLE THROUGH THE REST OF THE
CURRENT OVERNIGHT PERIOD AND INTO THE POST-DAWN HOURS ON TUESDAY,
MAINLY NORTH OF WIND POINT. SOME OF IT MAY BECOME DENSE.
CMILLER
MKX WATCHES/WARNINGS/ADVISORIES
WI...DENSE FOG ADVISORY...WIZ046-WIZ047-WIZ051-WIZ052-WIZ058-WIZ059-
WIZ060-WIZ065-WIZ066-WIZ071-WIZ072 UNTIL 9 AM TUESDAY.
LM...DENSE FOG ADVISORY...LMZ643-LMZ644-LMZ645 UNTIL 9 AM TUESDAY.
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