528
FXUS63 KGRB 012051
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
251 PM CST Mon Dec 1 2025

Forecast discussion for routine afternoon forecast issuance

.KEY MESSAGES...

- Light snow will move across central and east-central Wisconsin
  this afternoon and evening. Accumulations around half an inch
  are forecast, which could lead to scattered slippery stretches
  on roadways for the evening commute.

- An arctic front will bring a chance of light snow Tuesday night
  into Wednesday, followed by the coldest air of the season so
  far.

- Hazardous wind chills of 10 to 20 below zero are forecast for
  Thursday morning west of the Lake Michigan shoreline.

&&

.DISCUSSION...
Issued at 248 PM CST Mon Dec 1 2025

Light snow is spreading across central and east-central WI this
afternoon, with obs just starting to report snow in Green Bay in
the last 30 minutes. This is in association with a mid-level
trough coming through, but overall forcing is rather weak, and
moisture is limited as most is going towards the stronger system
moving across the central Plains into the Ohio River Valley.
Therefore, while light snow remains through mid-late evening,
only expecting around half an inch of accumulation or less.
Northern/north-central WI will miss out an any snow, just
remaining cloudy.

Dry weather is expected Tuesday, followed by the chance (30-60%)
for light snow on Tuesday night Wednesday in association with an
arctic front coming through. Similar to today, forcing and
moisture is not overly high, making for forecast snow amounts
generally 1 inch or less.

The bigger story with the arctic front will be the temperature
drop, with lows Thursday morning falling to the single digits
below zero for most away from the immediate lake shore. In
combination with a steady NW wind, wind chill values of 10 to 20
below are likely throughout Thursday morning. Highs on Thursday
will then struggle to reach the teens. Readings moderate some the
rest of the week, but remain below normal for early December.

There are chances for snow again Friday and into the weekend as
various features quickly pass through the state, but confidence is
low in any details at this point due to lack of timing and
location specifics.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1211 PM CST Mon Dec 1 2025

Primarily MVFR flying conditions area wide early this afternoon
with BKN-OVC clouds between 1-3kft. Light snow will spread into
central and east-central WI early to mid-afternoon, and then
depart this evening. Occasional ceiling and visibility drops
within the snow will bring IFR conditions at times, otherwise
MVFR will remain. Improvements to VFR are expected across east-
central and northeast WI late night as sky partially clears and
cloud bases rise. MVFR/IFR flying conditions are likely to persist
in central and north-central WI through the TAF period as low
clouds hang tight.

SW winds will gust to around 15kts in northern WI early this
afternoon, otherwise winds will be light (less than 10 kts) from
the W/SW through the TAF period.

&&

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

&&

$$

DISCUSSION.....KLJ
AVIATION.......KLJ

NWS GRB Office Area Forecast Discussion