


Area Forecast Discussion
Issued by NWS Green Bay, WI
Issued by NWS Green Bay, WI
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762 FXUS63 KGRB 061955 AFDGRB Area Forecast Discussion National Weather Service Green Bay WI 255 PM CDT Sun Jul 6 2025 Forecast discussion for routine afternoon forecast issuance .KEY MESSAGES... - Areas of fog possible in the Wisconsin River Valley late tonight. - Seasonal summer weather is expected over the next week. Shower and thunderstorm chances expected Monday night into Tuesday, and again Friday into Friday night. && .DISCUSSION... Issued at 255 PM CDT Sun Jul 6 2025 Rain associated with a short-wave trough was finally moving out of eastern WI this afternoon, and clouds were gradually clearing. North to northeast winds were gusting to around 20 mph in eastern WI. Temperatures ranged from the middle 60s near Lake Michigan to the 70s and lower 80s inland. Fog Potential Tonight...High pressure will ridge into the western Great Lakes tonight, resulting in partly cloudy skies and decreasing winds. Conditions will be most favorable for fog in the Wisconsin River Valley (NC/C WI), where boundary layer winds will diminish to around 5 knots. Farther east, there should be just enough wind to prevent any significant fog development. Although patchy dense ground fog is likely, do not anticipate any need for fog headlines. Precipitation Trends...Rainfall chances will occur in association with a couple short-wave and frontal passages this week; mainly during the late Monday night through Tuesday and Friday through Friday night periods. Current indications suggest only marginal instability for both events, so the severe threat is uncertain. The late week system appears to have a bit more dynamic forcing and a more moist air mass, with PWATs increasing to 2+ inches in some areas. Will need to keep an eye out for heavy rainfall potential Friday into Friday night. Seasonal temperatures are expected through the extended forecast period. && .AVIATION...for 18Z TAF Issuance Issued at 1241 PM CDT Sun Jul 6 2025 Light rain and low stratus continued across the Fox Valley and lakeshore areas at issuance time, but flight conditions had improved to VFR farther west. Expect this trend to progress east, with VFR over the entire forecast area by around 21z. N-NE winds will gust to around 20 kts at times this afternoon, especially in the Fox Valley and lakeshore areas. Conditions look favorable for fog development in the Wisconsin River Valley of NC/C WI late tonight. Have kept a TEMPO group for possible LIFR fog at RHI between 08z-12z/Mon. && .GRB WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION.....Kieckbusch AVIATION.......Kieckbusch