FXUS63 KGRB 220600 AFDGRB Area Forecast Discussion National Weather Service Green Bay WI 100 AM CDT Sun Mar 22 2026 Forecast discussion for routine afternoon forecast issuance .KEY MESSAGES... - Snowmelt will cause increased flows and rising levels on rivers and streams. Several rivers may reach bankfull or even minor flood stage within the next couple days. - Temperatures will cool to near normal today, then rise to above normal again during the middle of next week. - A wintry mix of precipitation is possible during the middle of next week, with the most widespread coverage occurring Wednesday night into Thursday. && .DISCUSSION... Issued at 1258 AM CDT Sun Mar 22 2026 A cold front is currently making its way through northern Wisconsin early this morning, which will bring a period of post- frontal precipitation to the region this morning. Precipitation type is expected to mainly be rain; however, snow could mix in or changeover completely across north-central Wisconsin. The brief period this precipitation is expected to occur should keep the impacts from any frozen precipitation to a minimum. The precipitation should end by mid to late morning as high pressure builds in across the northern Great Lakes region. Although skies will clear out some by this afternoon, the push of cold air behind the front will keep high temperatures in the 30s and 40s. The aforementioned high pressure will provide mainly dry weather and seasonable temperatures tonight and Monday. Small precipitation chances occur at times across mainly northern Wisconsin from late Monday night through Wednesday, with perhaps more widespread precipitation occurring as another clipper system and cold front move through Wednesday night into Thursday. A wintry mix of rain/snow and possible freezing rain is expected through this period. Mild temperatures are expected mid-week, with highs reaching into the 40s and lower 50s from Tuesday through Thursday. High pressure brings mainly dry conditions and seasonable temperatures back to the region Friday and Saturday. && .AVIATION...for 06Z TAF Issuance Issued at 952 PM CDT Sat Mar 21 2026 VFR conditions prevailed across most of the area late this evening, though MVFR stratus has begun encroaching from the north. A cold front then drops south overnight, bringing with it more widespread MVFR/IFR stratus and a mix of sleet and rain. Rain/sleet should make it RHI by around 06Z, spreading south to the central and east-central WI sites by 08 to 10Z. Precip then exits by mid- morning Sunday, giving way to VFR cigs at most terminals by late Sunday afternoon. However, MVFR stratus will linger in/around RHI through the end of the TAF period. Northerly winds ramp up behind the front Sunday afternoon, gusting between 15 and 20 knots at most sites, highest across east- central. Winds subside with the loss of daytime mixing Sunday evening. LLWS concerns will persist during the first few hours of the TAF period as an 850 mb jet exits to the east. && .HYDROLOGY... Issued at 1258 AM CDT Sun Mar 22 2026 Despite cooler temperatures, the snowpack will continue to melt across the region. This will result in increasing flows and rising river levels. Modeled snowpack temperature from the NOHRSC site points to widespread ripening of the snowpack, and higher susceptibility of melting. However, the lack of a prolonged significant warmup (and nighttime temperatures dropping below freezing most nights) points to a more gradual rise in area rivers as opposed to widespread rapid rise flooding. Some rivers will likely reach bankfull or even minor flood stage within the next couple days. The flooding situation will be monitored closely given how much water is locked up in the current snowpack across the region. Fortunately, no significant precipitation events are expected over the next week, so nearly all of the runoff will be attributed to melting snow. && .GRB WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION.....Kurimski AVIATION.......Goodin HYDROLOGY......Kurimski