509
FXUS63 KGRB 012355
AFDGRB

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

Updated aviation portion for 00Z TAF 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 00Z TAF Issuance
Issued at 555 PM CST Mon Dec 1 2025

The widespread area of light snow and flurries will slowly end
from northwest to southeast across the region this evening, with a
mix of mainly VFR and MVFR conditions, but a few patchy IFR
conditions are expected at times. As the snow ends, look for low
clouds to remain across central and north central WI (AUW/CWA/RHI)
into Tuesday (with a brief period of just mid-clouds this
evening). Across eastern WI (ATW/GRB/MTW), some breaks in the low
clouds are expected, mainly late tonight into Tuesday morning.
Some flurries can`t be ruled out in any of the low clouds
overnight into Tuesday. Any breaks in the clouds will fill back
in on Tuesday afternoon as another weak system approaches from the
west. Winds will remain on the light side tonight, mainly out of
the SW/W. SW winds will increase Tuesday morning with gusts to
around 15 kts expected by Tuesday afternoon.

&&

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

&&

$$

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