NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 222330
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
630 PM CDT Sun Mar 22 2026

Updated aviation portion for 00Z TAF issuance

.KEY MESSAGES...

- Some rivers will remain at bankfull or even reach minor flood
  stage within the next couple days.

- Temperatures will moderate the next few days, rising to above
  normal again from Tuesday to Thursday.

- A wintry mix of precipitation is possible during the middle of
  of the work week, especially Wednesday night into Thursday.

- Pleasant weekend expected, with dry conditions and mild
  temperatures.

&&

.DISCUSSION...
Issued at 307 PM CDT Sun Mar 22 2026

Mostly cloudy skies and cool temperatures were observed across the
region this afternoon, along with NNE winds gusting to 20 to 30
mph in the Fox Valley and lakeshore areas. Low clouds had
partially eroded over central, east central and northeast WI, but
were still locked in over the north central part of the state.

Fairly strong subsidence is expected across the forecast area
later this evening into Monday morning. This should help to break
up the low clouds, though they may briefly move back into north
central WI overnight into early Monday morning. High pressure will
bring widespread clearing and sunshine by Monday afternoon,
though high temperatures will only reach normal readings in the
lower to middle 40s.

High pressure slides east Monday night, setting the stage for a
brief period of WAA overnight, followed by a weak cold front
sagging into northern WI on Tuesday before stalling out. These
features are only expected to bring a small chance of
precipitation to far northern WI through Wednesday. Low pressure
approaching from the Northern Plains and an associated cold front
may bring more widespread mixed precipitation to the region
Wednesday night into Thursday. Once this system passes, Canadian
high pressure will move into the region for the weekend, bringing
mainly dry conditions.

After a cooler start to the week, milder temperatures in the 40s
and 50s arrive Tuesday through Thursday. A brief cool down
arrives after the Thursday cold frontal passage, but above normal
temperatures return for the weekend.

&&

.AVIATION...for 00Z TAF Issuance
Issued at 529 PM CDT Sun Mar 22 2026

SCT low clouds have barely made it to the central Wisconsin sites
this evening, though OVC lake effect stratus has lingered across
the north. Suspect that MVFR cigs will persist over RHI for the
majority of the TAF period if current trends hold, though there
may be a brief window in which the low clouds break apart later
this evening. However, all terminals should eventually lift to VFR
flying conditions by the end of the TAF period. North winds
gradually back to south/southwesterly Monday afternoon, gusting
between 10 and 15 knots.

&&

.HYDROLOGY...
Issued at 307 PM CDT Sun Mar 22 2026

Several rivers have recently risen above bankfull, including the
Wisconsin, Spirit, Big Rib, East and Yellow rivers. Forecasts
indicate that the Wolf River should reach bankfull on Monday
afternoon. At this point, the greatest threat of minor flooding
appears to be on the Yellow River near Babcock, as the current
river stage is already within a foot of flood stage, and still
rising. Although a Flood Warning or two (for minor flooding) may
become necessary, no significant flooding is anticipated at this
time.

&&

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

&&

$$

DISCUSSION.....Kieckbusch
AVIATION.......Goodin
HYDROLOGY......Kieckbusch