NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 281843
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
143 PM CDT Tue Apr 28 2026

Forecast discussion for routine afternoon forecast issuance

.KEY MESSAGES...

- A chance (30-50%) of showers Wednesday and Thursday, with
  rainfall totals generally under 0.25 inch through the weekend.

- Minor flooding persists on the Wolf River and on the Winnebago
  system. Light rainfall will allow flooding concerns to
  gradually subside as the week progresses.

- Below normal temperatures expected through the weekend.

&&

.DISCUSSION...
Issued at 142 PM CDT Tue Apr 28 2026

Persistent northwest flow aloft will bring a series of short-waves
through the western Great lakes region for the rest of the work
week. One will arrive late tonight/early Wednesday and bring a
small chance of light showers or sprinkles, with a stronger wave
generating scattered showers Wednesday afternoon and early
evening. Another short-wave is expected Thursday afternoon, along
with a good chance of showers. Although we are currently carrying
a dry forecast on Friday, we may eventually need to add a small
chance of showers, as yet another wave moves through in the
afternoon. Little or no instability is expected through this
period, so thunderstorms should not be concern.

Weak high pressure attempts to build into the region for the
weekend, so we may get a break in the daily shower activity then.
Shower chances increase during the early part of the next work
week as a fairly potent cold front moves through, though timing of
the front is in question at this point.

Given a persistent flow of Canadian air into the region, it is not
a surprise that temperatures will remain below normal for much of
the week. Some moderation in temperatures (to near normal) should
occur ahead of the front early next week, but this trend is
expected to be brief.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1238 PM CDT Tue Apr 28 2026

Clouds will continue to scatter out from southwest to
northeast this afternoon, with MVFR conditions improving to
VFR. High/mid clouds increase this evening, with a few light
showers or sprinkles accompanying a short-wave trough late
tonight into early Wednesday. A strong short-wave brings
scattered showers during the afternoon, with ceilings generally in
the 3500-4500 ft AGL range.

Gusty west winds gradually subside through sunset, with light
NW-NE winds through the rest of the TAF period.

&&

.HYDROLOGY...
Issued at 142 PM CDT Tue Apr 28 2026

Minor flooding persists on the Wolf River at Shiocton and New
London, in addition to the Winnebago system. However, with less
rainfall than expected with the past two frontal systems and only
light rain anticipated for the rest of the week, flooding
concerns will gradually lessen into the weekend.

Those living near rivers or streams should continue to monitor
the latest Flood Warnings and statements from the National Weather
Service in Green Bay.

&&

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

&&

$$

DISCUSSION.....Kieckbusch
AVIATION.......Kieckbusch
HYDROLOGY......Kieckbusch