743
FXUS63 KGRB 071044
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
444 AM CST Sat Nov 7 2026

Updated aviation portion for 12Z TAF issuance

.KEY MESSAGES...

- Dry until the middle of next week with a warming trend. Peak of
  warmth will be Monday and Tuesday.

- Northwest winds may gust over 30 mph on Sunday, especially
  north.

- Turning cooler by late next week with return of lake effect
  rain and snow showers.

&&

.DISCUSSION...
Issued at 1030 PM CST Fri Nov 6 2026

High pressure crossing into Saturday settles toward central Plains
and Ohio Valley by Sunday. Patchy ground fog possible beneath the
high tonight into early Saturday. Airmass very dry so not expecting
much coverage to fog, but with temps below freezing and pavement
temps dropping below freezing up north, a few slippery spots could
occur.

Cold front (more of a wind shift) sweeping through late Saturday
night into Sunday along with pressure rises and winds up to 35 kts
in the mixed layer may push wind gusts 30-35 mph over the northwoods,
with 20-30 mph elsewhere.

Highs on Sunday reach the lower to middle 50s, which is back
above average. Warmer temperatures continue on Monday and Tuesday,
with highs maybe reaching 60. However, probabilities for highs
reaching above 60F have diminished compared to what was shown last
night. Stronger cold front tied to broad upper troughing drops
across the region on Wednesday, Veterans Day. Low chances for rain
now showing up in the forecast on into Thursday, matching what
was shown by LREF data yesterday. Not a widespread signal for
precip, mainly just impacting lake effect areas of north-central
and along Door County/Lake Michigan. Even on the LREF probabilities
for more than 0.25 inch of precip are less than 5%, so if this
occurs it looks pretty light. Hint of colder air is showing up
more now into late next week, so seems could see some rain/snow or
snow at times for the lake effect areas of the north as 850mb
temps drop to around -8c. During this most recent cool down,
850mb temps were -4c to -6c, so could end up even cooler later
next week. Extended MOS guidance from GFS and ECMWF points to this
as well.

&&

.AVIATION...for 12Z TAF Issuance
Issued at 443 AM CST Sat Nov 7 2026

High clouds continue to stream in from western Wisconsin along
with MVFR lake stratocu across Door County. The high clouds have
dissipated the densest fog across northern Wisconsin early this
morning, especially at RHI. The rest of today will feature mix of
mid and high clouds, along with MVFR to low-end scattered cu
developing in the afternoon. Clouds then increase this evening
with some LLWS developing across central and north-central
Wisconsin this evening then east-central Wisconsin overnight as
west winds just above the surface increase to 35-40 kts.

Light and variable winds will become southwest this afternoon 5 to
10 knots then westerly tonight and increasing to 10 to 20 knots.

&&

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

&&

$$

DISCUSSION.....JLA
AVIATION.......Kurimski

NWS GRB Office Area Forecast Discussion