Green Bay, Wisconsin 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

939
FXUS63 KGRB 141947
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
247 PM CDT Sun Jun 14 2026

Forecast discussion for routine afternoon forecast issuance

.KEY MESSAGES...

- 60-90% chance of showers and storms, especially Tuesday
  afternoon and again Wednesday afternoon and evening. The risk
  of severe weather is low.

- 30-50% chance of showers and storms on Thursday

- Below normal temperatures are expected through much of the work
  week.

&&

.DISCUSSION...
Issued at 246 PM CDT Sun Jun 14 2026

A 500mb closed low near Hudson Bay is going to meander over the
next several days, resulting in a cool west-northwest flow pattern
that will bring periodic chances of showers and storms. The cool
air aloft, combined with daytime heating could trigger isolated to
scattered showers and storms (30-50% chance) across the north
Monday afternoon. Meanwhile, the first upper level disturbance
across the Dakotas will swing southeast to the Minnesota/Wisconsin
border by 12z Tuesday. This feature will move across Wisconsin
during the day Tuesday, bringing a 60-90% chance of showers and
some storms. The risk of severe weather is low, although could not
rule out some small hail with stronger storms. Showers and storms
will come to an end Tuesday afternoon or early evening.

Attention turns to the next upstream disturbance across the
northern plains at 12z Wednesday. This feature has better dynamics
with it, thus could not rule out a stronger storm. Rain chances
will increase to 60-90% Wednesday afternoon into Wednesday
evening. There will be a break in the rain later Wednesday night,
however the cool cyclonic flow aloft and daytime heating will
result in isolated to scattered showers and storms redeveloping
later Thursday morning and afternoon. Dry conditions are expected
Friday with the next chance of showers and storms over next
weekend.

Below normal temperatures are expected through the week, with some
of the coolest temperatures on Monday and Tuesday where highs in
some spots may not get out of the low to middle 60s.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1155 AM CDT Sun Jun 14 2026

Any lingering MVFR CIGS across far northern WI will rise
into the VFR category by mid-afternoon. Otherwise, CIGS of
3,5000 to 4,5000 feet should rise to 5,000 to 6,000 feet
later this afternoon, although clouds will be on the decrease
towards sunset. Northwest winds of 10 to 20 knots with gusts
to 25 knots will subside late this afternoon into early this
evening, then back west to southwest 5 to 10 knots this
evening and overnight as skies become clear during the evening.
Fair weather cumulus and gusts around 15 knots from the west will
develop around 16z Monday.

&&

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

&&

$$

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