NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 291041
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
541 AM CDT Fri May 29 2026

Updated aviation portion for 12Z TAF issuance

.KEY MESSAGES...

- Mainly dry weather with above normal temperatures and low
  relative humidity for the next week, with highs mainly in the
  middle 70s to middle 80s.

&&

.DISCUSSION...
Issued at 104 AM CDT Fri May 29 2026

Persistence forecast continues for the better part of the next
week as an omega blocking pattern sets up over the CONUS. The only
chances for rain, though minimal, look to be Sunday night into
Monday as a backdoor cold front drops southeast through the
state. However, any sprinkles of rain will have to contend with
abundant dry air entrainment from a Hudson Bay high sitting and
spinning to the north.

Temperatures...High temperatures peak in the mid to upper 80s
this afternoon as a warming ridge builds over the Midwest,
steadying out in the mid 70s to mid 80s through the middle of next
week. Readings will likely be around 10 degrees cooler along the
shoreline each day as a lake breeze kicks in during the afternoon.
A rogue 90 degree reading or two would not be out of the question
this afternoon, with probabilistic guidance showing a 20 to 40%
signal for exceeding 90 degrees over far northeast Wisconsin.
However, an earlier shift to easterly winds may mitigate
temperatures.

The next best chance for hitting 90 isn't until Wednesday of next
week, with a 10-30% chance west and north of the Fox Valley as
the high shifts a bit to the east. Thursday looks to be even
warmer, with a 20-40% chance of hitting 90 from the Fox Valley
west across central Wisconsin as a more humid airmass works its
way in from the south. The high shifting to the east will also
mean the next best shot of rain on Thursday at 10-30%.

Fire weather...Elevated fire weather conditions will remain
possible through early next week as a prolonged dry stretch
allows afternoon RHs to fall into the 20 to 30% range. This being
said, green up continues to spread across the Northwoods, with
pine fuels becoming less volatile as a result. Winds will also be
light during this time, which should reduce any significant
impacts.

&&

.AVIATION...for 12Z TAF Issuance
Issued at 541 AM CDT Fri May 29 2026

VFR conditions are expected through the TAF period as high clouds
stream in at times. Light and variable winds will become
west/southwest 5 to 10 knots this morning and afternoon. Winds are
expected to back to the southeast around 10 knots this afternoon
along the Lake Michigan shoreline as lake breeze moves onshore.

&&

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

&&

$$

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