NWS-Milwaukee/Sullivan Forecast Discussion

						FXUS63 KMKX 061114
AFDMKX

Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
614 AM CDT Thu Aug 6 2026

.KEY MESSAGES...

- Dense Fog Advisory until 9 AM CDT for MQT, Green Lake, and
  Columbia Counties with small pockets of dense fog in adjacent
  counties as well.

- Warmer temperatures & humidity return late week into at least
  early next week along with shower/storm chances


&&

.UPDATE...
Issued 614 AM CDT Thu Aug 6 2026

Areas of fog are occurring over srn WI with some dense fog
toward central WI. A Dense Fog Advisory is in effect until 9 AM
CDT for MQT, Green Lake, and Columbia Counties. Otherwise a
shortwave trough is currently moving across srn WI with another
over IL. A few very light showers over ne IL may sneak across
the border for brief periods this morning. Partly to mostly
cloudy skies are expected for the remainder of the day with
lower to middle 70s at the lake and near 80F well inland.

For tnt, high pressure will move east with lgt sly winds
developing. This will help maintain moisture transport from the
south and the potential for some fog.


Gehring

&&

.SHORT TERM...
Issued 1236 AM CDT Thu Aug 6 2026

Tonight through Friday:

Surface high pressure will build in overnight, with a mix of mid
and lower level clouds lingering. It still looks like fog will
be possible later tonight into early Thursday where there is
clearing, given lingering low level moisture and light winds.

Not out of the question for a shower or two Thursday afternoon
along the lake breeze, but most places will likely be dry
tomorrow. Some lower ceilings may linger in the southeast
through at least the morning hours, with gradually clearing
likely from the northwest through the day. There should be
enough sunshine for high temps around normal.

Light winds will persist through Thursday night, with more fog
possible given enough clearing. Dry weather will continue as the
high gradually shifts eastward.

Showers and storms will be possible later Friday into Friday
night as low pressure passing by to the north drags a cold front
through the region. The precip may arrive late enough to only
have limited instability to work with, with models suggesting
storms may be weakening as they arrive in the west around mid-
evening.

DDV

&&

.LONG TERM...
Issued 1236 AM CDT Thu Aug 6 2026

Saturday through Wednesday

Additional rounds of storms will be possible Saturday into at
least early next week as moisture lingers and a couple more
shortwaves move through. Models are currently focusing on the
higher potential Saturday night and again Monday night. Could
see storm chances linger into mid-week if the deeper moisture
hangs on farther north per the latest ECMWF. Temps are expected
to remain with a few degrees of normal through the extended
forecast period.

DDV

&&

.AVIATION...
Issued 614 AM CDT Thu Aug 6 2026

Areas of dense fog through 13Z-14Z mainly toward central WI or
in river valleys. Areas of BR and light fog elsewhere with vsbys
of 1-5SM. By late morning MVFR Cigs are expected to develop over
se WI while Cigs toward east central and south central WI will
rise to 3.5-4.0 kft. Areas of 2-5SM BR is then forecast late
tnt especially over south central WI.

Gehring

&&

.MARINE...
Issued 1236 AM CDT Thu Aug 6 2026

Light winds are expected tonight into Friday morning, as high
pressure of 30.0 inches gradually moves through the region.
Areas of fog will be possible tonight into Thursday morning.
Southerly winds will increase by Friday afternoon as the high
departs to the east and low pressure of 29.8 inches reaches Lake
Superior from the west. Scattered showers and storms are
possible Friday night as the low drags a cold front across the
lake. West to northwest winds behind the front later Friday
night into early Saturday will quickly return to southerly by
Saturday evening ahead of the next approaching low pressure
system.

DDV

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Dense Fog Advisory...WIZ046-WIZ047-WIZ057 until 9 AM Thursday.

LM...None.
&&

$$

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