767
FXUS63 KGRB 021910
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
210 PM CDT Sat Aug 2 2025

Forecast discussion for routine afternoon forecast issuance

.KEY MESSAGES...

- Smoke from Canadian wildfires will result in poor air quality
  and reduced visibilities at times through the weekend and likely
  into the early part of next week. An Air Quality Advisory is
  currently in effect until noon Sunday. The Advisory may be
  extended on Sunday.

- Patchy fog may restrict visibilities for motorists at times late
  tonight and Sunday night.

- Dry weather, cool nights, warm days and low humidity are
  expected through the weekend. Rain chances are not expected to
  return until the middle to later part of next week (15-30%
  chance).

&&

.DISCUSSION...
Issued at 138 PM CDT Sat Aug 2 2025

Satellite imagery indicated a plethora of Canadian wildfire smoke
swirling aloft this afternoon with METAR observations showing
restrictions in visibilities as some of the smoke reaches the
surface. High pressure will remain over the Great Lakes region
through early next week, with not much change in the airmass. This
means the aforementioned smoke will linger across the western
Great Lakes aloft and at the surface at times through at least
Monday as indicated by the RAP/HRRR Vertically-Integrated and
Near-Surface Smoke forecast. An Air Quality Advisory is in effect
until noon Sunday and may be extended as needed in subsequent
forecasts.

Surface ridging should generally keep the forecast dry for much of
the upcoming week, as several low pressure systems approach the
western Great Lakes, but get deflected northeast by the high
pressure system in place. While these low pressure systems are not
expected to make it through the state, they could graze central
and north-central Wisconsin at times during the middle part of the
week, bringing a small (10-20%) chance for showers and
thunderstorms.

A better chance for showers and thunderstorms (20-30%) arrives
late in the week and into next weekend as the ridge breaks down,
allowing a cold front to track through the area. The timing and
strength of the cold front are still uncertain; therefore,
confidence in the timing and intensity of any showers and
thunderstorms is rather low.

Temperatures will start out around normal for the rest of the
weekend into early next week, then edge up to a few degrees above
normal from the middle of next week through next weekend.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1202 PM CDT Sat Aug 2 2025

Areas of smoke and some fair weather cumulus are expected through
the TAF period. The height of the clouds should be between five
and seven thousand feet. Smoke should lower visibilities into the
3-5 mile range at times. Fog is expected to redevelop again
tonight, generally between 07z-12z Sunday, which should burn off
quickly after sunrise. Fair weather cumulus are expected again
Sunday afternoon.

&&

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

&&

$$

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