414
FXUS63 KGRB 072029
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
329 PM CDT Mon Apr 7 2025

Forecast discussion for routine afternoon forecast issuance

.KEY MESSAGES...

- Water levels will remain elevated on area rivers and streams for
  another day or two. Minor flooding will continue on the Wolf
  River.

- Low relative humidity could lead to elevated fire weather
  conditions on Tuesday.

- Small precipitation chances expected midweek, then drier and
  warmer weather expected for the end of the week.

&&

.DISCUSSION...
Issued at 328 PM CDT Mon Apr 7 2025

One final short-wave trough was moving through far NE WI this
afternoon, and was generating a few flurries over the Fox
Valley/lakeshore areas. A few light lake-effect snow showers or
flurries were still ongoing over Vilas County.

Subsidence behind the departing short-wave, loss of daytime
heating and the slow arrival of a dry Canadian high pressure
system will bring an end to any lingering flurries and bring
some clearing this evening. Winds will also subside by early
evening, which should allow temperatures to drop into the teens
and lower 20s in most locations. The exception will be over NC and
far NE WI, where some of the typical cold spots and snow covered
areas will drop into the single digits late tonight.

On Tuesday, the dry Canadian high will be situated across the
region, which will lead to another cool day, but with much
lighter winds. There will likely be some late morning/afternoon
high-based cumulus development, with the greatest coverage
expected in far NE WI. Very low humidity, with RHs dropping into
the upper teens and 20s, could lead to elevated fire weather
conditions during the afternoon. Dry conditions prevail into
Tuesday night, but clouds will gradually increase.

A low pressure system coming out of the Central Plains will
move east through central IL Wednesday into Wednesday night,
and an upper trough will move through Wednesday night into
Thursday. Most of the precipitation with the low is expected to
impact southern WI, but the northern edge of the precipitation
shield could reach C/EC WI. In addition, confluent mid-level flow
and associated frontogenetic forcing could bring some light mixed
rain/snow over northern WI, though dry air could wipe most of
this out. Precipitation chances will diminish as the upper trough
shifts east later Thursday into Thursday evening.

Mainly dry and milder conditions are expected Friday into Saturday
as upper level ridging and southerly surface winds set up over
the western Great Lakes. Small chances for showers return Sunday
into Monday as the ridge shifts east and low pressure approaches
from the Northern Plains. Above normal temperatures in the 50s
and 60s are expected during this period.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1240 PM CDT Mon Apr 7 2025

Ceilings had risen to VFR at most locations by mid-day, except
where lake-effect snow showers were occurring in far NC WI. Radar
indicated scattered very light snow showers or flurries elsewhere
in the forecast area. North winds were gusting to 20 to 30 knots,
with the strongest gusts in eastern WI.

Skies will clear later this afternoon and evening, with clear to
partly cloudy skies anticipated through the rest of the TAF
period. The gusty winds will also diminish by early evening.

&&

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

&&

$$

DISCUSSION.....Kieckbusch
AVIATION.......Kieckbusch