166
FXUS63 KGRB 082241
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
541 PM CDT Wed Oct 8 2025

Updated aviation portion for 00Z TAF issuance

.KEY MESSAGES...

- A Frost Advisory has been issued for central, east central and
  northeast Wisconsin, except near Lake Michigan, late tonight
  into early Thursday.

- Showers and a few thunderstorms are expected late Thursday
  night into Friday night, along with increasing winds.

- Above normal temperatures expected for much of the next week.

&&

.DISCUSSION...
Issued at 341 PM CDT Wed Oct 8 2025

Canadian high pressure will reside over the region tonight, so
another night of cool temperatures in the 20s and 30s is expected.
A Frost Advisory has been issued for central, east central and
northeast WI, away from Lake Michigan, late tonight into early
Thursday, as temperatures drop into the lower to middle 30s.
The growing season has ended across most of northern WI (due to
last night`s hard freeze), so despite lows in the middle 20s to
lower 30s, no frost/freeze headlines will be issued there.

Temperatures...After one last night of cool temperatures, an
extended period of mild temperatures is expected for the next
week. Lows will be primarility in the 40s and lower 50s, while
highs reach into the 60s.

Precipitation...Dry conditions prevail through Thursday, but a
clipper system will bring precipitation chances late Thursday
night into Friday night. This system has trended stronger, with a
30 to 40 knot low-level jet anticipated late Thursday night into
early Friday, a cold frontal passage on Friday, and a potent
upper low tracking through Friday afternoon and evening. Have
increased pops with this system, introduced a slight chance of
thunderstorms (due to strong dynamics/weak instability), and
increased winds. A Small Craft Advisory will likely be needed as
south winds increase and waves build ahead of the cold front,
followed by gusty northwest winds in the wake of the frontal
passage. Showers may persist well into Friday night, and possibly
in eastern WI on Saturday, as the upper low is slow to depart.

Dry conditions are anticipated for the end of the weekend, but
shower chances return Sunday night into Monday, and Tuesday night
into Wednesday.

&&

.AVIATION...for 00Z TAF Issuance
Issued at 540 PM CDT Wed Oct 8 2025

VFR conditions will prevail at all terminals through the TAF period.

A high pressure system currently centered over northwest Wisconsin
will continue to move eastward overnight keeping skies clear and
winds light. Clear skies should remain through much of Thursday,
expect along Lake Michigan where scattered cu based around 4.5kft
may develop during the afternoon. Winds Thursday will veer around to
the south with periodic gusts to 15 kts possible.

Beyond the TAF period a compact clipper system and associated cold
front is expected to reach the region early Friday mornign bringing
the next chance for precipitation and lower cigs. Breezy northwest
winds are also expected Friday.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Frost Advisory from 1 AM to 9 AM CDT Thursday for WIZ020-030-031-
035>039-045-048-049-073-074.
&&

$$

DISCUSSION.....Kieckbusch
AVIATION.......GK