510
FXUS63 KGRB 081107
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
507 AM CST Sun Nov 8 2026

Updated aviation portion for 12Z TAF issuance

.KEY MESSAGES...

- Dry with slightly above normal temperatures through the middle
  of next week. Warmest days will be Monday and Tuesday.

- Northwest winds may gust up to 35 mph Sunday afternoon,
  especially across northern Wisconsin.

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

&&

.DISCUSSION...
Issued at 945 PM CST Sat Nov 7 2026

A dry cold frontal passage will bring an increase in cloud cover
overnight. Behind the front winds will become northwesterly for
Sunday, and with a tightening pressure gradient and deeper mixing up
to around 850mb gusts will increase to around 25-35 mph Sunday
afternoon, strongest across northern WI, before subsiding Sunday
evening.

A brief period of high pressure Monday will keep the forecast dry
and temps a few degrees above normal before the next frontal passage
comes Tuesday into Wednesday. NBM probs continue to show 20 to 30%
PoPs, highest over the over the lake effect belts of north-central
WI as well as northern Door Co. Colder shot of air also arrives
during this time as 850 mb temps fall to -7 to -9C, hinting at the
potential for snow flurries mixing in with light rain at times.
Otherwise, respectable signal (50 to 60%) exists for below normal
precipitation and above normal temperatures into the middle of the
November.

&&

.AVIATION...for 12Z TAF Issuance
Issued at 507 AM CST Sun Nov 8 2026

An area of IFR stratus has developed between AUW and RHI this
morning; however, it is expected to remain away from the TAF sites
and dissipate shortly after sunrise. Mostly clear skies are
expected across the region this morning in the wake of a departing
cold front. Later today, a deck of MVFR status clouds is expected
to develop over Lake Superior and sink south this afternoon
across north-central Wisconsin, impacting RHI. This cloud deck
should then lift back north this evening.

LLWS will continue this morning with 850 mb winds gusting to near
40 knots until mixing out shortly after sunrise. Westerly surface
winds shift to northwest this morning, with gusts increasing to
around 25 to 30 knots at all terminals this afternoon. By this
evening, winds should diminish below 10 kts.

&&

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

&&

$$

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

NWS GRB Office Area Forecast Discussion