038
FXUS63 KGRB 052322
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
622 PM CDT Tue May 5 2026

Updated aviation portion for 00Z TAF issuance

.KEY MESSAGES...

- Cool temperatures the next couple days, with Frost headlines
  anticipated for central WI, the Fox Valley and lakeshore areas
  tonight and Wednesday night.

- Only minor precipitation chances expected this week, with
  minimal impacts until at least Tuesday.

&&

.DISCUSSION...
Issued at 252 PM CDT Tue May 5 2026

An extensive areas of stratocumulus clouds covered locations
northwest of the Fox Valley and lakeshore areas this afternoon.
Deep mixing resulted in breezy conditions, with west winds gusting
to 20 to 30 mph. Temperatures ranged from the lower 40s far
northwest to the lower to middle 50s southeast.

Frost Headlines Tonight and Wednesday night: Expecting low
temperatures to drop into the lower to middle 30s in central
WI, the Fox Valley and lakeshore areas the next two nights.
Although temperatures could briefly drop below freezing in
central WI both nights, the short duration should prevent a hard
freeze in most areas. Have issued a Frost Advisory for our
counties that have entered the active growing season, and would
anticipate similar headlines tomorrow night.

Precipitation Chances: Several short-wave troughs will move
through the region during the rest of the work week, but the best
chance of showers looks to occur during the late morning through
mid-afternoon on Thursday. Other notable precipitation chances
occur with a cold frontal passage on Saturday, and with a clipper
low pressure system and associated cold front next Tuesday into
Tuesday night. This last system looks to be the most potent, with
more available moisture and possibly some elevated instability. At
the least, would anticipate more widespread shower activity.

In between the light rain chances, brief periods of elevated fire
weather conditions will occur in association with deep mixing,
low relative humidity, moderate winds and increasingly volatile
springtime fuels.

Temperatures: With persistent northwest flow aloft bringing
reinforcing shots of Canadian air into the region, temperatures
will remain below normal to near normal through the next week.

&&

.AVIATION...for 00Z TAF Issuance
Issued at 622 PM CDT Tue May 5 2026

VFR conditions are expected through the TAF period. SCT-BKN VFR
stratocumulus should scatter out this evening, then redevelop
later Wednesday morning. Gusty west winds will diminish by early
evening, then pick up again late Wednesday morning, though not as
strong as today (10-20 kts).

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Frost Advisory from 2 AM to 8 AM CDT Wednesday for WIZ022-030-
031-035>040-045-048>050.
&&

$$

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

NWS GRB Office Area Forecast Discussion