556
FXUS63 KGRB 302306
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
606 PM CDT Sat May 30 2026

Updated aviation portion for 00Z TAF issuance

.KEY MESSAGES...

- Dry weather prevails through the middle of next week.

- After today, temperatures rising and remaining above normal
  through next week. Highs mainly in the 80s.

- Elevated fire weather conditions into next week due to low
  relative humidity and above normal temperatures. Near-critical
  conditions may develop later next week when winds increase.

&&

.DISCUSSION...
Issued at 215 PM CDT Sat May 30 2026

Precipitation Chances...A strong ridge of high pressure is expected
to dominate the weather pattern through at least the middle of next
week, keeping conditions dry. The only minor intrusion that some
guidance is hinting at is a subtle shift of the persistent
stationary moisture to the southwest of the region moving into the
southwest portion of the forecast area Sunday night into Monday. If
this occurs, a few light rain showers or sprinkles may occur, but
dry air from the prevailing high pressure should keep conditions
dry. By Wednesday night, the upper-level ridge will flatten and the
high pressure will slide eastward as a shortwave trough approaches
from the northern Plains. Beginning Thursday, the pattern becomes
unsettled with multiple chances for showers and thunderstorms
through next weekend. Since there are still some timing issues, it
is too early to determine any severe potential at this time.

Temperatures...After today`s seasonable temperatures, expect high
temperatures to be about 10 degrees above normal from Sunday through
at least Wednesday, ranging from the upper 70s to mid 80s each day.
Temperatures will be slightly cooler along the lakeshore as well.
With dew points at tolerable levels during this time, the heat risk
is low (level 1 out of 4), which primarily impacts those who are
extremely sensitive to heat and without cooling/hydration. Overnight
lows through Tuesday night will be near or slightly above normal,
ranging from the mid 40s to mid 50s.

&&

.AVIATION...for 00Z TAF Issuance
Issued at 606 PM CDT Sat May 30 2026

VFR conditions will prevail through the TAF period as high clouds
continue to filter over the region, thickest across central WI and
the southern Fox Valley. Winds will become light and variable
tonight, then southeast-south on Sunday mainly under 7 kts. A lake
breeze is likely to develop Sunday afternoon which would turn winds
easterly along and near the Lake Michigan shoreline (MTW) with gusts
of up to 15kts as the lake boundary pushes inland.

&&

.FIRE WEATHER...
Issued at 215 PM CDT Sat May 30 2026

Until a widespread wetting rain occurs, elevated fire weather
conditions will continue through much of next week as afternoon
RHs will roughly be 30% or lower with temperatures in the
70s/80s. Despite green up progressing and/or completing, fuel
input from fire partners points to concern where recent dryness
persists, any days with increasing winds could allow the fire
weather potential to rise to near-critical. The best potential
could be the middle to late part of next week as the lower RH
values could coincide with increasing gradient winds as the
prevailing high pressure exits east and a shortwave/trough
approaches from the northern Plains.

&&

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

&&

$$

DISCUSSION.....Kruk
AVIATION.......GK
FIRE WEATHER...Kruk

NWS GRB Office Area Forecast Discussion