NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 062319
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
619 PM CDT Wed May 6 2026

Updated aviation portion for 00Z TAF issuance

.KEY MESSAGES...

- Temperatures will be at or below normal for the next week,
  resulting in a few more nights of Frost headlines.

- Frost Advisory from 1 AM to 8 AM for portions of central and
  northeast WI, mainly along and south of a line from Wausau to
  Green Bay to northern Door County.

- Increased rain chances (25-40%) on Thursday and (20-40%) on
  Saturday. Only a 10-30% chance of a tenth of an inch on Thursday
  over far northeast WI.

&&

.DISCUSSION...
Issued at 204 PM CDT Wed May 6 2026

Temperatures at or below normal will continue into the weekend,
which likely result in a few more nights of frost headlines. The
latest Frost Advisory will be tonight from 1 AM to 8 AM for the
same counties where the growing season has started. Still waiting
for green up across the north which has been stunted by the
recent cool weather.

The main changes to the forecast is to increase rain chances on
Thursday to 25-40% and on Saturday from 20-40% as as weak
disturbances move along the mean flow. For the Thursday system,
the highest rain chances will be across central into east central
Wisconsin during the morning into the early afternoon. The focus
for highest rain chances later Thursday afternoon into the evening
will be across the north. The latest HREF probabilities indicated
only a 10-30% chance of a tenth of an inch of rain on Thursday.
For the Saturday system, the highest probabilities of
precipitation and rainfall amounts over the north.

Frost headlines may be needed Friday morning in some areas where
the growing season has started. Temperatures should returns closer
to normal into the first half of the weekend before another cool
down returns on Sunday. Temperatures should return to or possible
a few degrees above normal by the middle of next week. Along with
the warmer temperatures, the chances of rain and a few storms
are possible Tuesday and Wednesday.

&&

.AVIATION...for 00Z TAF Issuance
Issued at 619 PM CDT Wed May 6 2026

VFR conditions will prevail through Thursday afternoon. A few
showers are expected to pop across central WI Thursday morning
and continue into the afternoon across east-central WI. Meanwhile,
additional showers should develop across the north Thursday
afternoon and linger into Thursday evening. Handled these
precipitation chances with PROB30 groups at each of the TAF sites.
Will need to watch winds along the bay and lake for a wind off the
cooler bodies of water.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Frost Advisory from 1 AM to 8 AM CDT Thursday for WIZ022-030-031-
035>040-045-048>050.
&&

$$

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