593
FXUS63 KGRB 090328
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
1028 PM CDT Wed Oct 8 2025

Updated aviation portion for 06Z TAF issuance

.KEY MESSAGES...

- A Frost Advisory has been issued for central, east central and
  northeast Wisconsin, 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 06Z TAF Issuance
Issued at 1026 PM CDT Wed Oct 8 2025

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

A high pressure system currently centered over north-central
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.

A compact clipper system and associated cold front are forecast to
arrive into north-central WI late Thursday night into Friday
morning. This will bring the next chance for precipitation to the
region along with a period. For now have only included a TEMPO
ground with -SHRA at RHI at the very end of the TAF period. Along
and behind the front an MVFR status deck is also likely Friday
morning across northern WI.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Frost Advisory until 9 AM CDT Thursday for WIZ020-022-030-031-
035>040-045-048>050-073-074.
&&

$$

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