Area Forecast Discussion
Issued by NWS Green Bay, WI

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698
FXUS63 KGRB 132308
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
608 PM CDT Mon Oct 13 2025

Updated aviation portion for 00Z TAF issuance

.KEY MESSAGES...

- Cold temperatures are expected tonight. Cooler, but still near
  normal, readings for Tuesday and Wednesday, with a warm up for
  late in the week.

- Dry weather expected tonight into Tuesday. Additional rain
  chances Tuesday evening/night and again at times later this week
  and into the weekend.

&&

.DISCUSSION...
Issued at 213 PM CDT Mon Oct 13 2025

Clearing will continue to make its way west through the early
evening, with mostly clear skies expected tonight. The mostly
clear skies and light winds will allow for abundant radiational
cooling overnight, allowing temperatures to plummet across the
region. Lows tonight are expected to fall to around 30 across the
north, with middle 40s along the Lake Michigan shoreline.

North to northeast winds will bring cooler temperatures on
Tuesday, as highs only rise into the 50s across the north and
around 60 across the Fox Valley and lakeshore. Dry weather is
expected for much of Tuesday, with a shortwave bringing a chance
for some showers Tuesday night. The best chances (40-60 percent)
will be south of highway 29 where the best 700-850 mb
frontogenesis will reside with lesser chances (30-40 percent)
across northern Wisconsin just north of the main frontogenesis.

After a brief period of dry weather Wednesday and Wednesday night,
the chance for rain will return Thursday and continue through the
weekend as several low pressure systems and associated mid level
shortwaves track through the area. Despite the prolonged period of
rain chances, the rain itself looks to be light and showery and by
no means several days of heavy rain. There will also very likely
be dry periods intermixed during these periods; however, these are
difficult to parse out this far in the forecast as the NWP models
diverge this far out. Temperatures will warm back up to above
normal by the end of the week.

&&

.AVIATION...for 00Z TAF Issuance
Issued at 608 PM CDT Mon Oct 13 2025

A period of good VFR flying conditions is expected for the TAF
period. Some high clouds will gradually move in but should not
pose any ceiling restrictions. Winds will be very light overnight
through much of Tuesday. Another period of scattered showers is
then possible late Tuesday evening, beyond the current TAF
period.

&&

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

&&

$$

DISCUSSION.....Kurimski
AVIATION.......Uhlmann