Cascade Mountain Snow Report

143 FXUS63 KGRB 310609 AFDGRB Area Forecast Discussion National Weather Service Green Bay WI 109 AM CDT Fri Jul 31 2026 Forecast discussion for routine morning forecast issuance .KEY MESSAGES... - Chance (60 to 80%) for widespread showers and storms today and tonight. No severe weather is expected. - Dry weather expected for the second half of the weekend into early next week. - Active weather returns the middle of next week as a series of low pressure systems track through the region. && .DISCUSSION... Issued at 109 AM CDT Fri Jul 31 2026 Rain/storm chances...Widespread rain/thunder expected today and tonight, continuing into Saturday. Recent model trends are a bit further north with the low and expected precipitation, with a corresponding rise in precipitation chances (60-80%). Despite the area in a Marginal Risk for excessive rainfall, probabilistic data indicates the chance for exceeding an inch of rain today and tonight is rather minimal. The best chances are across the far southern CWA with a 20-40% chance of exceeding this threshold. Therefore, excessive rainfall is not expected to be a high impact. Convective activity should remain minimal due to weak shear (< 20 knots) and limited forcing. Overall, signs point toward a period of light to moderate stratiform rain today and tonight. Expect light rain to persist through Saturday morning as the cold front continues to sag south. Dry weather should then settle in through the early part of next week as high pressure and upper level ridging build in across the region. A low pressure system approaching from the west will bring a return to the active pattern in the middle part of next week with a chance (30-50%) of showers and thunderstorms. The forcing and instability look rather week during this period; therefore, high impact weather is not anticipated. Smoke... Expect air quality readings in the moderate (yellow) category today as an elevated smoke plume reaches the surface at times. Per upstream obs, little to no deterioration in visibility are expected. && .AVIATION...for 06Z TAF Issuance Issued at 1041 PM CDT Thu Jul 30 2026 VFR conditions are expected tonight. BKN to SCT cigs based around 8kft will linger over much of the region, with light and variable winds overnight. Friday a surface low passing across the middle Mississippi Valley will bring another round of rain to the region. Rain is progged to arrive from west to east during the early afternoon. With limited instability have left TSRA out of all TAF sites with this issuance. Rain should be falling from a mid level cloud deck, based 7-10 kft AGL. Cigs across central WI may lower near MVFR Friday evening. Main ovation will likely be periods of MVFR vsbys as any heavier showers pass over an terminals. Light winds 5-10 kts are expected to back from the southwest to northeast Friday. && .GRB WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION.....Kurimski AVIATION.......GK