NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 302026
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
226 PM CST Fri Jan 30 2026

Forecast discussion for routine afternoon forecast issuance

.KEY MESSAGES...

- A dusting to an inch of snow may create travel concerns from
  Sunday afternoon through Sunday night.

- A more impactful system is anticipated for Thursday PM into
  Friday AM, with the potential for accumulating snow, gusty winds
  and possible gales on Lake Michigan.

&&

.DISCUSSION...
Issued at 224 PM CST Fri Jan 30 2026

For most of January, 500mb ridge across western North America
has dominated the weather pattern with downstream troughing
noted across eastern North America. This pattern has led to
warmer conditions across the western United States with cold
across the east. In matter fact, the 500mb trough will deepen
enough to drive the 850mb 0C isotherm all the way south to
Miami and Key West, Florida Sunday morning (GFS/ECMWF models).
Back in Wisconsin, for the month temperatures have been averaging
2 to 5 degrees below normal. Temperatures during the forecast
period are going to warm up to seasonable cold category, possibly
reaching the upper 20s later in the week.

There are two systems to contend with during the period. The first
system is expected to impact the area Sunday afternoon and Sunday
night. The latest trends are to slow the eastern progression of
the snow as it makes it into eastern WI. Some guidance doesn't
have snow reaching Green Bay until mid-evening on Sunday.
Accumulations under an inch are expected across the entire area.
The NBM probabilities of an inch or greater of snow is only 10-25%
across central and north-central WI.

A strong clipper system is expected to move across the western
Great Lakes Thursday into Friday morning, with the greatest
impacts across northeast WI Thursday afternoon and evening at
the moment. Chance of snow are for now are set at 40-60%.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1050 AM CST Fri Jan 30 2026

VFR conditions prevailed across much of the region this morning,
except across the far north where MVFR CIGS were reported in
some spots. For the afternoon and evening, low clouds are
expected to develop or spread southward with MVFR CIGS at
times. Along with the low clouds, there will be a chance of
snow showers across the far north and over far northeast WI
with a chance of flurries elsewhere. Clouds will beon the decrease
late tonight into Saturday morning. The next chance of light snow
(50-70%) is on Sunday afternoon and Sunday night. Most likely snowfall
amounts are from 1/2 to 1 inch.

&&

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

&&

$$

DISCUSSION.....Eckberg
AVIATION.......Eckberg