173
FXUS63 KGRB 251704
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
1104 AM CST Sun Jan 25 2026

Updated aviation portion for 18Z TAF issuance

.KEY MESSAGES...

- Bitter cold temperatures will continue through Monday. A Cold
  Weather Advisory is in effect this morning and again
  overnight into Monday morning.

- Temperatures will remain unseasonably cold through the work
  week with gradual moderation favored towards next weekend.

- The next week will be predominantly dry with the probability
  of impactful snow low. The most likely period for fluffy
  accumulations up to 1/2 inch will be Monday evening/night.

&&

.DISCUSSION...
Issued at 305 AM CST Sun Jan 25 2026

Cold Temps Persist:

Early this morning, mostly clear skies and light winds across north-
central Wisconsin have resulted in temperatures plummeting into the
20s below zero in spots, while temperatures across east-central
Wisconsin have remained in the single digits below zero, aided by
more cloud cover on the periphery of the winter storm tracking
well south of the area. A Cold Weather Advisory remains in
effect this morning, but did push up the expiration time across
east-central into northeast Wisconsin where the clouds may hold
wind chills a bit higher.

Another very cold night is ahead for tonight as high pressure drops
south across the Plains, keeping the region in low-level
northerly flow and modest cold advection. Coordinated with
surrounding offices to hoist another Cold Weather Advisory
overnight through Monday morning with wind chills once again
falling to 20 to 35 below zero.

The cold weather pattern will continue through the work week as
strongly meridional northwest flow persists across the Upper Midwest
with reinforcing surges of cold air filtering south through the
week. Ensembles support some gradual moderation in temps by next
weekend or beyond as mid-level heights begin to rise.

Snow Chances:

With the cold, dry airmass remaining entrenched, impactful snow
potential will be low over the next week. The window with the
highest snow chances at this time is Monday night as a strong
shortwave trough drives southward across the Great Lakes. Although
moisture will be limited, GEFS/EPS/Canadian ensembles support medium
to high (50-90%) light snow chances Monday evening given the
deep forcing, so have trended chances upward. However, fluffy
snow amounts generally will be around 1/2 inch or less.

Spotty light snow or flurries cannot be ruled out with
subsequent shortwave trough passages through the week within the
northwest flow regime. However, any snow amounts will be very
minor given the moisture-starved nature of these systems.
Additional lake effect snow showers may impact portions of
north-central Wisconsin through the middle of the week with
northwesterly low-level flow.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1101 AM CST Sun Jan 25 2026

MVFR/VFR stratus persisting from the Fox Valley to Lake Michigan
shoreline will trend VFR through the afternoon. VFR conditions are
then expected for the rest of the TAF period. Winds will increase
to 5-10 kts with periodic gusts nearing 20 kts this evening and
tonight.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Cold Weather Advisory until noon CST today for WIZ005-010>012-
018-019-030-035-036.

Cold Weather Advisory from midnight tonight to noon CST Monday
for WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074.
&&

$$

DISCUSSION.....JM
AVIATION.......Kurimski

NWS GRB Office Area Forecast Discussion