603
FXUS63 KGRB 102348
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
548 PM CST Wed Dec 10 2025

Updated aviation portion for 00Z TAF issuance

.KEY MESSAGES...

- There is a 40 to 60 percent chance of light snow on Friday.
  While any accumulations generally should be under an inch, a
  light coating of snow may result in locally slick travel.

- A period of hazardous cold air will impact the area Friday
  night through the weekend with wind chills of 15 to 30 below
  zero likely at times, lowest over central Wisconsin.

- Temperatures will begin to trend back towards mid-December
  averages by the middle of next week.

&&

.DISCUSSION...
Issued at 145 PM CST Wed Dec 10 2025

Tonight-Friday: Cold, Light Snow Friday

Low-level stratus remained prevalent along with some flurries this
afternoon as colder air continues to work across the region. Broad
troughing will remain anchored across the eastern US through Friday
keeping our area in cold northwest flow aloft. Although colder air
arrives for the weekend, the next few days will still be well below
average with highs in the teens and 20s and lows mainly in the
single digits on either side of zero, modulated by cloud trends.
Snow with a shortwave trough dropping southeast from the northern
plains on Thursday will largely skirt southwest of the area, but
some flurries or light snow may graze central Wisconsin on
Thursday.

There is higher confidence for light snow on Friday with synoptic
forcing ahead of the push of Arctic Air. NBM snow chances have
increased into the 40 to 70% range on Friday, while raw global
ensemble probabilities are in the 60 to 90% range. Precipitation
chances often are underdone with very light precip events, such as
this. Although probabilities for an inch of snow are generally
low (

NWS GRB Office Area Forecast Discussion