014
FXUS63 KGRB 201813
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
113 PM CDT Sun Sep 20 2026

Forecast discussion for routine afternoon forecast issuance

.KEY MESSAGES...

- Hazardous boating and swimming conditions are expected on the
  Bay and Lake at times through Tuesday.

- A quieter and drier weather pattern will settle into the region
  for the next week. Patchy frost will be possible at times
  across the northwoods.

&&

.DISCUSSION...
Issued at 113 PM CDT Sun Sep 20 2026

Minimally impactful weather is expected through next weekend. Mostly
cloudy skies will remain across the region tonight as breezy
northeast wind stream over the relativity warm waters of Lakes
Michigan and Superior, however, with increasing dry air moving in at
mid-levels don`t expect any lake effect rain. A short-wave,
currently over Wyoming, will track east across the mid-Mississippi
and Ohio valleys Monday and Tuesday shutting warm and moist air well
south of the region and allowing a Hudson Bay high to continue
feeding seasonally cool, dry, and stable air into the region. With
that clear skies over night Monday and Tuesday nights may lead to
areas of frost across parts of north-central WI. Temperatures will
begin to trend warmer later into the week with highs return to above
normal by next weekend. Next chance for widespread rain doesn`t look
to arrive until early next week.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1219 PM CDT Sun Sep 20 2026

Northeast winds are streaming a blanket of BKN to OVC MVFR
stratocumulus clouds over the region this afternoon. Expect these
cigs will gradually rise and scatter out through the afternoon and
evening with most terminals return to VFR. Overnight a push of VFR
cirrus clouds are expected to pass over the region. Monday morning
another blanket of lake induced stratocumulus clouds is expected to
stream over the region with cloud bases around 3-3.5 kft.

Breezy northeast winds will continue around 10-20 kts with gusts to
25 kts this afternoon, with locally higher gusts possible,
especially near Lake Michigan. Winds will gradually weaken overnight
before increasing again Monday morning.

&&

.MARINE...
Issued at 113 PM CDT Sun Sep 20 2026

Northeast winds will persist through the early part of this week
with passage of a cold front. Gusts from 20 to 30 kts will be likely
at times into Tuesday thanks to a potent high pressure system
keeping a tight pressure gradient over the Great Lakes. A Small
Craft Advisory and Beach Hazard Statement will remain in effect at
least through Tuesday evening.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Beach Hazards Statement through Tuesday evening for WIZ022-040-
050.
&&

$$

DISCUSSION.....GK
AVIATION.......GK
MARINE.........GK