Area Forecast Discussion
Issued by NWS Milwaukee/Sullivan, WI
Issued by NWS Milwaukee/Sullivan, WI
924 FXUS63 KMKX 170248 AFDMKX Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 948 PM CDT Fri Aug 16 2024 .KEY MESSAGES... - Showers possible with scattered storms for Saturday as a cold front moves through S WI. - Quieter conditions return into next week as high pressure moves in. && .UPDATE... Issued 950 PM CDT Fri Aug 16 2024 The upper low continues to gradually slide through the western Great Lakes region. While the majority of the best forcing has pushed out there will continue to be pockets of PVA sliding through this evening into tonight that will bring some additional scattered showers given the high moisture. A front will come through Saturday with more showers/storms possible (~40%) in the afternoon as the system finally slides out. Kuroski && .SHORT TERM... Issued 147 PM CDT Fri Aug 16 2024 Tonight through Sunday: MLCAPE of 1500-2000 J/KG is present this afternoon with sct shower and storm development underway. A well organized shortwave trough approaching sw WI will move across srn WI into the early evening. Numerous showers and storms are expected to develop with the the main window from 20Z-02Z as depicted on the HREF. The effective shear will remain 20-25 kts this afternoon but still enough for storm maintenance and organization, thus cannot rule out a few SVR storms with large hail and damaging winds. The sfc low will move across Lake MI this evening reaching srn Lake Huron by 00Z Sun. Its cold front and another vorticity maximum will move through srn WI on Sat. 50-70 percent chances for showers and storms are forecast for ern WI with lesser chances to the west. 500 mb heights will then be rising Sat nt- Sun bringing a return of some sunshine for Sun, but still a slight chance for a shower over sern WI. Temperatures will remain near normal for this period. Gehring && .LONG TERM... Issued 147 PM CDT Fri Aug 16 2024 Monday through Friday: An upper ridge will prevail over the central and srn Rockies and the high plains through the week. Sfc high pressure will remain in the vicinity of WI during this period. Pleasant and dry summer weather is expected. Temperatures will be near or slightly below normal. Gehring && .AVIATION... Issued 950 PM CDT Fri Aug 16 2024 MVFR/IFR CIGS will push in tonight on the backside of the low pressure with some patchy fog potential overnight as well with VSBYS as low as 3SM. Fog will likely be limited and will dissipate into the daylight but MVFR/IFR CIGS will continue through much of the the day Saturday with storm potential in the afternoon further east. By the late afternoon and early evening we should see low CIGS gradually clear out. Kuroski && .MARINE... Issued 147 PM CDT Fri Aug 16 2024 Low pressure near 29.7 inches over northwest Wisconsin will slowly move across northern Wisconsin this afternoon and tonight, and to southern Lake Huron by the end of Saturday. Modest south winds today will become westerly late this evening for the south half, and variable winds for the north half. The winds will then transition to breezy north to northwest winds for the weekend. The winds will gradually weaken early next week as high pressure arrives over the lake by Tuesday. Scattered thunderstorms can be expected over the lake today into Saturday evening. A Small Craft Advisory may be needed Sunday afternoon and night from Sheboygan to Winthrop Harbor due to breezy north winds and high waves. Gehring && .MKX WATCHES/WARNINGS/ADVISORIES... WI...None. LM...None. && $$ Visit us at weather.gov/milwaukee Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/NWSMilwaukee www.twitter.com/NWSMilwaukee www.youtube.com/NWSMilwaukee