543
FXUS63 KGRB 021740
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
1140 AM CST Tue Dec 2 2025

Updated aviation portion for 18Z TAF issuance

.KEY MESSAGES...

- An arctic front will bring a chance of light snow (30-70%)
  tonight into Wednesday, followed by the coldest air of the
  season so far. Snowfall accumulations up to an inch are
  expected, with an inch or two possible across Door County.

- Record or near record cold is expected on Thursday with a few
  locations possibly setting a record low or record low maximum
  for the date.

- Below normal temperatures will continue into next week.

&&

.DISCUSSION...
Issued at 249 AM CST Tue Dec 2 2025

Short Term...Today...Tonight...and Wednesday

Other than some flurries across north-central Wisconsin, dry
weather is expected across the region today. Highs today should
generally be in the lower 20s.

An arctic front tracking through the region will bring a chance
(30-70%) of snow tonight into Wednesday. The best forcing and
moisture will be to the north; therefore, snowfall amounts are
expected to largely be an inch or less. Door County could squeeze
out an inch or two as this area will be closer to the better
moisture and dynamics from this moisture starved system. Lows
tonight are expected to range from 10 to 15 across the north, to
the upper teens across the Fox Valley. Highs on Wednesday are
expected to generally be in the 20s before the arctic air causes
temperatures to plummet behind the front throughout the day.

Long Term...Wednesday Night Through Monday

A persistent west to northwest flow will continue to bring colder
than normal conditions through next weekend. For Wednesday night,
snow showers or flurries will linger across the far north (20-50%
in most of Vilas and far northwest Florence counties) with only a
minor accumulation expected. Lows temperatures should drop into
the single digits below zero across much of the area, except
across far northeast WI near Iron Mountain and Marinette, and
across Door County. Wind chill readings will drop to zero to 10
below zero across Door County, while the remainder of the area
should see wind chill readings in the 10 below to 20 below zero
range. The NBM probabilities of experiencing subzero temperatures
were highest across central and north-central WI which were from
70-90%, 50-70% across the Interstate/Highway 41 corridor to less
than 10% across northern Door County. Very cold conditions for
early December continue on Thursday with highs 8 to 16 degrees
above zero. A few places could see a record low or record low
maximum for December 4th. See climate section for December 4th
records. Later Thursday night and Friday, increasing southwest
winds are expected ahead of the next arctic cold front approaching
from the northwest. The passage of the arctic cold front will
necessitate a chance of snow showers (30-50%) as the front passes
across the area Friday afternoon and Friday night. Arctic air remains
in place next weekend. There is one item to watch next weekend.
The GFS/ECMWF/Canadian have a system passing to the south of the
area Saturday night into Sunday. Will continue to monitor to see
if there is a northward shift in the storm track.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1140 AM CST Tue Dec 2 2025

Blanket of status will continue to hang over the region this
afternoon and evening with primarily IFR cigs expected. Isolated
flurries will also continue to periodically  create MVFR vsbys across
central and northern WI this afternoon.

A cold front will approach and cross the region tonight bringing more
widespread light snow to the region. Brief impacts to visibility
will be possible, but the likelihood of vsbys below 1SM is less than
10%. Snow accumulations should be minimal at the TAF sites with most
terminals seeing a dusting up to one inch. Behind the cold front
cigs should begin to clear out late Wednesday morning, except across
far north and northeast WI where lake effect clouds will linger
through much of the day.

&&

.CLIMATE...
Issued at 249 AM CST Tue Dec 2 2025

Record or near record cold is expected on Thursday December 4th,
with a few locations possibly setting a record low or record low
maximum for the date. December 4th (record low/year(s) & record
low maximum/year(s)):

Antigo (-13/1985 & 8/1991), Appleton (-9/1940 & 14/1929,1942),
Green Bay (-8/1977 & 15/1976), Manitowoc (-2/1976 & 13/1976),
Marshfield (-16/1919 & 11/1972), Merrill (-23/1919 & 8/1976),
Oshkosh (-5/1977,1985 & 11/1991), Rhinelander (-22/1927 & 8/1972),
Stevens Point (-11/1902 & 10/1972), Sturgeon Bay (-1/1940 &
12/1976), Wausau (-7/1991 & 12/1991), Wisconsin Rapids (-18/1940 &
9/1991).

&&

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

&&

$$

DISCUSSION.....Kurimski/Eckberg
AVIATION.......GK
CLIMATE........Eckberg