737
FXUS63 KGRB 250905
AFDGRB

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

.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 /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 1048 PM CST Sat Jan 24 2026

VFR conditions will continue through Sunday afternoon.
On a side note, stratocumulus deck around 3,500 feet
develop this evening across northeast WI. This cloud
deck will impact the KATW/KGRB/KMTW taf sites early
Sunday morning, probably through 12z-14z before clearing.
Northwest winds will be on the increase on Sunday with gusts
of 15 to 20 knots during the afternoon and evening.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
WI...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.
     Cold Weather Advisory until 10 AM CST this morning for WIZ013-
     020>022-031-037>040-045-048>050-073-074.
MARINE...None.

&&

$$

DISCUSSION...JM
AVIATION...Eckberg

NWS GRB Office Area Forecast Discussion