NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 081135
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
635 AM CDT Fri May 8 2026

Updated aviation portion for 12Z TAF issuance

.KEY MESSAGES...

- Warmer today with highs in the 60s, then a return to below
  normal readings into early next week. Frost is possible at
  times.

- Backed away from rain chances on Saturday, with limited moisture
  to work with. The greatest opportunity for rain comes on
  Tuesday.

- Periods of elevated fire weather conditions will exist from the
  late mornings through the afternoons at times over the next few
  days.

&&

.DISCUSSION...
Issued at 236 AM CDT Fri May 8 2026

Temperatures: Frost Advisory remains on track for the night,
with readings at 07Z in the 30s. Clear skies and light to calm
winds will allow temps to drop a few more degrees tonight. High
temps will be near normal today, reaching the low to middle 60s.
This trend is short- lived as a cold front comes through WI
Saturday morning, bringing in a cooler airmass, and keeping temps
a little below normal into the first half of next week. Frost
Advisories may be needed again Sunday and Monday mornings with
lows approaching freezing.

Precipitation: A cold front moves across Wisconsin Saturday
morning, coinciding with various mid-level shortwaves brushing
across northern WI. Forecast soundings show some mid-level
moisture, but saturation in the low-level/near surface remains
limited. Models have also backed away showing much precip/QPF.
Continued some slight chance PoPs (~20%) across central WI
Saturday morning, otherwise narrowed it down to mainly sprinkles
for Saturday with the passage of these features.

A more organized clipper system is on track to move through the
Upper Midwest early next week, impacting Wisconsin on Tuesday.
This is the greatest opportunity to see rain over the next week,
with probabilities of getting at least 0.10" ranging from 40-60%,
highest in central Wisconsin.

&&

.AVIATION...for 12Z TAF Issuance
Issued at 635 AM CDT Fri May 8 2026

VFR conditions are expected through the TAF period. Look for a mix
of mid-high clouds today into tonight, with bases generally
between 8-12k ft. While most of the period will be dry, a sprinkle
or light shower will be possible this afternoon into tonight, but
no aviation impacts are expected.

Light and variable winds early this morning will become W/WSW and
increase to 12-18 kts by mid to late morning. Deep mixing will
allow for a gusts to around 20 kts in the late morning and
afternoon. The gusts will ease after sunset, but SW winds of 10-15
kts are expected overnight across the Fox Valley and lake shore,
with winds generally under 10 kts across central and northern WI
overnight. A lake breeze should turn winds S-SSE at KMTW this
afternoon into this evening.

&&

.FIRE WEATHER...
Issued at 236 AM CDT Fri May 8 2026

Brief periods of elevated fire weather conditions will occur over
the next few days due to deep mixing, low RHs, moderate winds,
and increasing dry fuels. Forecast soundings for today show deep
mixing to 8-10kft, bringing down sfc gusts to around 20 mph and
leading to RHs in the 25-32% range away from Lake Michigan.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Frost Advisory until 8 AM CDT this morning for WIZ022-030-031-
035>040-045-048>050.
&&

$$

DISCUSSION.....KLJ
AVIATION.......Bersch
FIRE WEATHER...KLJ