928
FXUS63 KGRB 151639
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
1039 AM CST Sun Nov 15 2026

Updated aviation portion for 18Z TAF issuance

.KEY MESSAGES...

- Dry weather through the middle of next week. Chances for light
  rain (20-35%) arrive Thursday, with better rain chances (60-80%)
  on Saturday.

- Gradual warming trend through next week, with high confidence in
  above normal temps. Peak of warmth Thursday and Friday.

&&

.DISCUSSION...
Issued at 1122 PM CST Sat Nov 14 2026

Core of the coldest air continues to slowly shift east of the
region as high pressure builds into the western Great Lakes,
allowing the lake effect cloud activity to diminish. Some early
morning ground fog will be possible on Sunday due to the calm
winds and clear skies. Expect high clouds to drift across the
region at times Sunday into early next week. Dry conditions will
prevail into Wednesday as the high pressure slowly drifts to the
east. A deep trough will move ashore on the west coast this
weekend, then arrive in the Great Lakes Thursday, bringing the
next chance for rain to the area. Main surface low passes
near/just north of Lake Superior but a surface trough should bring
a period of gusty winds (up to ~35 mph) and some showers to the
state. It is quick moving and pretty moisture-starved, so only
will carry 20-40% rain chances overnight Wednesday into Thursday.

The next weather maker will be quick on the heels of the Thursday
one, likely arriving by Friday PM/evening. Initial push of WAA
and warm front arrival will bring 20-50% shower chances, then a
better signal for more widespread and heavier rain arrives
Saturday into Sunday. Still some uncertainty on timing of the
time period for highest rain chances, but the highest chances
(50-75%) remain centered around Saturday. Cold air will attempt to
advect into the northern side of the low pressure, but its arrival
still looks a little too late to bring any impactful snow to the
area (

NWS GRB Office Area Forecast Discussion