Area Forecast Discussion
Issued by NWS Milwaukee/Sullivan, WI
Issued by NWS Milwaukee/Sullivan, WI
910 FXUS63 KMKX 040904 AFDMKX Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 404 AM CDT Mon Aug 4 2025 .KEY MESSAGES... - Patchy ground fog and valley fog will be possible through early this morning and again tonight. - Wildfire smoke will create haze and air quality at unhealthy levels at times through at least today. An Air Quality Advisory is in effect until noon. This advisory may need to be extended further, pending air quality observations this morning. - Heat and humidity gradually return this upcoming work week, along with shower and thunderstorm chances. && .SHORT TERM... Issued 404 AM CDT Mon Aug 4 2025 Today and Tonight: Another quiet day is expected today under high pressure. Sunshine will be filtered through smoke again, but should be enough for highs near normal. Could see the Air Quality Advisory extended once again given the latest HRRR smoke projections. Light winds and limited clouds cover will likely lead to some fog once again tonight in river valleys and other low lying areas. DDV && .LONG TERM... Issued 404 AM CDT Mon Aug 4 2025 Tuesday through Sunday: High pressure will continue to support dry conditions through at least Thursday morning. Heat and humidity will also begin to increase late week as a ridge amplifies into the the Upper Great Lakes region as troughing breaks down over Middle Appalachia. By late week, better flow aloft will build over the Northern plains into the Upper Great Lakes, with a surface trough approaching Wisconsin Friday night into Saturday. With the better flow aloft and surface lift from the trough, thunderstorm chances increase next weekend with the NBM painting 15 to 25 percent PoPs over the region Saturday through Sunday. CMiller && .AVIATION... Issued 404 AM CDT Mon Aug 4 2025 Light and variable winds this morning will become east to southeast 5 to 10 knots by this afternoon, returning to light and variable this evening under high pressure. Fog will linger in river valleys and other low lying areas early this morning and could return again tonight. Visibilites may drop to 5-7 miles at times due to lingering smoke during the day today. DDV && .MARINE... Issued 404 AM CDT Mon Aug 4 2025 High pressure around 30.2 inches will remain over the Great Lakes Region through Tuesday. Light and variable winds are expected across the Lake until the high shifts eastward into the New England states by mid-week. Light to moderate southerly winds return will return Wednesday. A low pressure system around 29.8 inches will move from the Northern Plains toward Hudson Bay and drag a warm front across Lake Michigan Wednesday into Thursday. Isolated showers and storms will be possible across the northern third of the lake. Winds will remain southerly through the end of the week. DDV && .MKX WATCHES/WARNINGS/ADVISORIES... WI...None. LM...None. && $$ Visit us at weather.gov/milwaukee Follow us on Facebook, X, and YouTube at: www.facebook.com/NWSMilwaukee www.x.com/NWSMilwaukee www.youtube.com/NWSMilwaukee