NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 120829
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
229 AM CST Mon Jan 12 2026

Forecast discussion for routine morning forecast issuance

.KEY MESSAGES...

- A light wintry mix may result in locally hazardous travel late
  tonight into Tuesday morning, especially across central and
  north-central Wisconsin. The Tuesday morning commute may be
  impacted.

- Accumulating lake-effect snow may cause additional travel
  concerns in far north central WI Tuesday night into Wednesday
  morning.

- Temperatures will rebound to above normal early this week, then
  turn colder from mid-week into the weekend.

&&

.DISCUSSION...
Issued at 207 AM CST Mon Jan 12 2026

Dry weather is expected today in the wake of a departing clipper
system. Highs today should rebound into the middle to upper 30s
with some sunshine, with some 40 degree readings not out of the
question across central and east-central Wisconsin.

Clouds will then increase tonight as the next clipper system
approaches from the west. This system will bring precipitation
back into the region late tonight into Tuesday, with a cold front
sweeping through the region Tuesday night. Precipitation from this
system will start out as a wintry mix, with mainly rain across
east-central, snow across northeast, and a mix of
snow/rain/freezing rain across central and north-central
Wisconsin. The freezing rain could bring a light glaze of ice
across the region late tonight into early Tuesday morning, which
could affect the morning commute across central and north-central
Wisconsin. However, the window for freezing rain will not be
particularly long as surface temperatures will warm throughout the
night and morning and model soundings indicate it will take a
while to saturate the column enough for precipitation to fall.
Therefore, will hold off on any headlines with this forecast
issuance as the window for freezing rain appears to be very brief.
The warming temperatures should transition the precipitation to
mainly rain later Tuesday morning through Tuesday afternoon, with
a mix across far north-central Wisconsin.

The aforementioned cold front will sweep through Tuesday night,
which will usher in much colder air into the region. The cold air
will turn any remaining precipitation to all snow late Tuesday
night as northerly winds turn blustery through Wednesday. The
northerly winds will turn on the lake effect machine across Vilas
County. Snowfall Tuesday night through Wednesday should be fairly
light, maybe a dusting across most places, with 1 to 3 inches
possible across Vilas County with the lake effect snow. Across the
Lake Michigan waters, gale force gusts will be possible late
Tuesday night through Wednesday evening.

A deep upper level trough dives southeast over the western Great
Lakes region Thursday night and Friday and settles in across the
area through the weekend. This will bring periodic snow showers to
northeast Wisconsin during through this period in the forecast.

Temperatures will warm to above normal early in the week. A
decent surge of colder air and gusty north winds follows the
midweek clipper system, leading to colder temperatures for the
latter half of the week and into the weekend.

&&

.AVIATION...for 06Z TAF Issuance
Issued at 1045 PM CST Sun Jan 11 2026

VFR conditions are expected through the TAF period. Mid clouds
were exiting to the east late this evening. Clearing will arrive
for part of the night, with scattered mid and high clouds
throughout Monday.

Winds will be from the west throughout the TAF period with gusts
to 20 kts at times. LLWS also develops tonight and continues
through Monday morning.

&&

.MARINE...
Issued at 207 AM CST Mon Jan 12 2026

A strong cold front will track through the region Tuesday night.
Gusty northerly winds in the wake of the cold front could cause
winds to gust to gale force across the Lake Michigan nearshore
waters and the bay of Green Bay from late Tuesday night through
Wednesday evening. Gale headlines may be issued in subsequent
forecasts.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION.....Kurimski
AVIATION.......KLJ
MARINE.........Kurimski