Area Forecast Discussion
Issued by NWS Milwaukee/Sullivan, WI
Issued by NWS Milwaukee/Sullivan, WI
436 FXUS63 KMKX 021053 AFDMKX Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 553 AM CDT Fri Oct 2 2026 .KEY MESSAGES... - Chilly overnight temps could lead to areas of patchy frost Friday, Sunday, and Monday nights. - Predominately dry weather into next week. && .UPDATE... Issued 553 AM CDT Fri Oct 2 2026 North to northwest winds will continue through this afternoon ahead of an approaching high pressure system. This high pressure will be moving from the Northern Plains and through the Great Lakes Region this weekend. This will keep conditions quiet, calm and relatively pleasant through the weekend. Under clear skies and light winds temperatures will drop overnight into the upper 30s to low 40s. Patchy frost will be possible so be sure to cover or bring in any sensitive plants. No major changes to the forecast. Patterson && .SHORT TERM... Issued 1226 AM CDT Fri Oct 2 2026 Today through Saturday night: Strong high pressure builds into Upper Midwest today, bringing breezy northwesterly winds across southern Wisconsin this morning through this afternoon. Highs in the low 60s are expected. As high pressure continues to build across southern Wisconsin, expect winds to become calm overnight with lows in the upper 30s to low 40s. A few areas of patchy frost may develop under clear skies, especially in low-lying areas. Cover or bring sensitive plants indoors. High pressure continues to propagate eastward into Saturday as low pressure swings eastward through the Canadian Prairies, leading to breezy south-southeasterly winds and increasing cloud cover by the afternoon hours. With southeasterly winds, expect highs in the mid-60s inland and highs in the low 60s downwind of Lake Michigan. A cold front from this low will move southeastward through Wisconsin overnight Saturday, bringing a few showers to central Wisconsin and perhaps southern Wisconsin. However, dry air in the low to mid levels in southern Wisconsin will likely keep any showers from reaching the ground. Expect lows in the mid to upper 40s. MH && .LONG TERM... Issued 1226 AM CDT Fri Oct 2 2026 Sunday through Friday: A return to northwesterly winds on Sunday as high pressure sinks into the northern Plains. Expecting clearing skies and highs in the upper 60s. High pressure builds into the Great Lakes region Sunday night, with lows in the upper 30s to low 40s once again. With clear skies and calm winds, frost once again becomes possible. High pressure lingers through Monday and Monday night, with light winds, mostly clear skies, highs in the 60s, and lows around 40 degrees. Winds become southerly again into Tuesday as high pressure propagates eastward and low pressure propagates across the northern Canadian Prairies into the Hudson Bay. Expect highs in the upper 60s and lows in the upper 40s to around 50 degrees. A weak, dry front will progress southeastward through southern Wisconsin Tuesday night into Wednesday morning, bringing light westerly winds and highs in the 70s into Wednesday as high pressure builds from the central Plains eastward into southern Wisconsin. High pressure looks to linger over the area through the end of the week, with multiple weak shortwaves bringing on and off shower potential and highs and lows consistently around 70 and 50 degrees, respectively. MH && .AVIATION... Issued 553 AM CDT Fri Oct 2 2026 predominantly VFR conditions are expected through the period. High level clouds are still streaming in from the west and should gradually clear to the east this morning. There could be a bit of fair weather cumulus clouds that try to develop this afternoon around 3-5kft. The one potential for some MVFR conditions will be late tonight into early Saturday morning. Forecast sounding are hinting at a potential for fog to develop under the clear skies and light winds overnight. Any fog that develops should be patchy and dissipate shortly after sunrise Saturday. With the low confidence in fog developing will leave any mentions of fog out of the TAFs for now. North to northwest winds today may be a bit breezy at times. By this evening winds become light and variable. South winds develop Saturday. Patterson && .MARINE... Issued 1226 AM CDT Fri Oct 2 2026 High pressure around 30.4 inches will build through the Upper Midwest today, bringing gusty north-northwesterly winds through the morning, gradually diminishing this afternoon. Hazardous winds and waves are possible in nearshore waters from Wind Point southward through this afternoon. High pressure will keep winds light and variable through tonight, before becoming southerly as high pressure exits to the east and low pressure around 29.9 inches moves eastward through the Canadian Prairies. Winds gradually back to westerly into Sunday morning and to northwesterly as low pressure moves into the Hudson Bay and a cold front moves through the lake. High pressure returns Monday into Monday night, with light and variable winds before another low develops over the Canadian Prairies and brings strong southwesterly winds on Tuesday into Tuesday night, gradually diminishing into Wednesday as the low lifts northward. MH && .MKX WATCHES/WARNINGS/ADVISORIES... WI...None. LM...Small Craft Advisory...LMZ646 until 1 PM Friday. && $$ 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