NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 051741
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
1241 PM CDT Sat Sep 5 2026

Updated aviation portion for 18Z TAF issuance

.KEY MESSAGES...

- Patchy fog is possible late tonight.

- Dry conditions for Labor Day weekend. The next chance of
  rain/storms will be from Monday night through Tuesday night.

- No signs of fall like temperatures through the middle of next
  week as the stretch of above normal temperatures continue.

&&

.DISCUSSION...
Issued at 126 AM CDT Sat Sep 5 2026

Some pesky showers lingered across Door and Kewaunee counties
early this morning. A few of the meso models that picked up on
this activity after midnight has the rain ending between 3 to 5
AM. Activity should be confined to the lakeshore counties,
possibly as far west as Brown and Calumet counties.

Meanwhile, the other concern early this morning is the potential
dense fog. Enough wind and low stratus has so far prevented
dense fog to develop. With longer nights and winds may slacken
off towards sunrise, potential exists for areas of dense fog
to expand. Any fog should burn off by mid-morning.

For the Labor Day Weekend, high pressure and upper-level ridging
will build over the area today and then remain across the area
through Labor Day as the stretch of above normal temperatures
continues. Current thinking is that the MET guidance is too cool
while the MAV guidance may be a tad bit high. For highs through
Labor Day, trended toward the BCConsall guidance values. The next
chance of showers and thunderstorms will be from later Monday
night through Tuesday night as a weak cold front moves across the
area. It is too early to determine if any of the storms would
become severe. Mainly dry conditions are expected Wednesday
through Friday.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1241 PM CDT Sat Sep 5 2026

A stratus cloud deck with MVFR cigs remained in place across the
area early this afternoon, except in north-central WI where some
clearing occurred. Anticipate the MVFR cloud deck to gradually
rise/dissipate into this afternoon leaving VFR conditions in place
for the remainder of this TAF period. The only exception may be
some IFR/MVFR vsbys due to patchy fog roughly between 07z-12z Sun.

East to northeast winds of 5 to 10 kts are expected for the
remainder of the day, becoming variable and calm overnight.

&&

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

&&

$$

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