634
FXUS63 KGRB 221134
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
534 AM CST Thu Jan 22 2026

Updated aviation portion for 12Z TAF issuance

.KEY MESSAGES...

- Temporary visibility drops and slippery stretches on roads are
  possible today with periods of light snow. Minimal
  accumulations are expected.

- Extreme Cold Warning is in effect tonight through Friday
  morning. Wind chills of 35 to 45 below zero are expected across
  the region.

- The coldest of the air departs Saturday, but temperatures remain
  below normal into next week.

&&

.DISCUSSION...
Issued at 254 AM CST Thu Jan 22 2026

Light snow showers today...

Another weak short-wave will trek across the region today spurring on
periods of light snow. CAMs are in generally good agreement that
snow showers should start to blossom across central and northern
WI after 15Z this morning as a surge of CAA moves into the region.
Snow showers will then continue on and off through much of the
day. The combination of dry low-level air and poor SLRs ( moisture
residing above the DGZ) will limit snow accumulations to just a
tenth or two at most locations. Primarily impact to travel will be
brief periods of reduced visibility as low as 1 mile. Isolated
slippery stretches are also possible. The strong CAA will also
help mix down stronger winds this afternoon and evening with gusts
up to 30 mph possible (40-50% chance) across central and east-
central WI. This could create patchy area of blowing snow even
after snow stops falling.

Extreme cold Tonight through Saturday morning...

Forecast for dangerously cold temperatures and wind chills remains
on track beginning tonight through at least Saturday morning as
there has been very little change within the suite of guidance.
Did move the start time of the Extreme Cold Warning for our wester
counties up to 9PM as winds have come up a few mph leading to a
quicker drop in wind chills. Tonight air temps are forecast to
fall 15 to 25 degrees below zero with wind chills of 35 to 45
degrees below zero across the entire region. Coldest wind chills
will be across north-central WI where there is a 35-45% chance for
wind chills to reach 50 below in some locations. Continued the
Extreme Cold Watch for Friday afternoon through Saturday as there
is a little more uncertainty during this period due to increasing
cloud cover and residual winds. Despite the cold, it does not look
like many records will be broken. The best places to see any
records broken is for record low max temps on Friday. The records
at Antigo and Wausau are -6, and the current forecast call for a
high around
-10.

Beyond Saturday, temps and wind chills look to stay away from
headline criteria, but still remain well below normal for late
January. Wind chills will struggle to get about zero into early
next week.

In addition to the cold eastern WI may see some light snow on Sunday
as winds become easterly on the periphery of a powerful winter
storm forecast to track from the southern Plains to the mid-
Atlantic. NBM probs are still pretty mutes with 10-20% chances for
greater than 1" of snow east of I-41 and up into Door Co.

&&

.AVIATION...for 12Z TAF Issuance
Issued at 531 AM CST Thu Jan 22 2026

Skies have cleared out early this morning leaving VFR conditions
across the region. However, upstream satellite and radar  show the
next wave of flurries/light snow showers already moving into
northwest WI. As this round of snow moves into northern and central
WI this morning MVFR conditions will return. As low-level lapse rates
steepen this morning a few snow showers could become a little more
vigorous as create brief periods of IFR vsbys, however, confidence
of this occurring at any TAF site is too low to include in the TAFs.
Flying conditions will improve this evening as clouds begin to
scatter out.

Westerly winds are expected through much of the TAF period, with
periods of gusts to 20-30 kts. Winds turn northwesterly this evening.

For ground operations dangerously cold temperatures and wind chills
are expected beginning tonight through Saturday morning. Wind chills
of 25 to 45 degrees below zero are expected Friday and Saturday
mornings.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Extreme Cold Warning from 9 PM this evening to 1 PM CST Friday
for WIZ005-010>012-018-019-030-035-036.

Extreme Cold Watch from Friday afternoon through Saturday
morning for WIZ005-010>013-018>022-030-031-035>040-045-048>050-
073-074.

Extreme Cold Warning from midnight tonight to 1 PM CST Friday
for WIZ013-020>022-031-037>040-045-048>050-073-074.
&&

$$

DISCUSSION.....GK
AVIATION.......GK

NWS GRB Office Area Forecast Discussion