textproduct: Marquette

KEY MESSAGES

- Widespread showers and thunderstorms continue across the area today, before dwindling down tonight into potentially Thursday.

- Expect dangerous waves and rip currents over the Lake Michigan beaches of Schoolcraft County today. Dangerous waves and rips currents then form over the Lake Superior beaches of Alger County on Thursday.

- Generally seasonable temperatures are expected through the rest of this week.

DISCUSSION

Issued at 248 AM EDT Wed Aug 26 2026

Showers and storms are decreasing over the area early this morning as the initial cold front of the Clipper low moving into Lake Superior moves east out of our area, allowing us a quick reprieve from precipitation. However, don't expect this reprieve to last all that long as wrap-around moisture moves in and restarts shower and thunderstorm activity across Upper MI. Thankfully, no strong thunderstorms are expected as the better severe weather threat will be further south and east today. However, some heavy rainfall could be seen at times, particularly over the east where the greatest rainfall totals are projected; this is even reflected in the latest NBM rainfall probabilities, with a 40-90% chance for greater than an inch of rainfall over the east between now and 8 PM EDT. As for the rest of the area, the chances for exceeding more than an inch of rainfall between now and 8 PM EDT this evening is no more than 30%, with most spots in the central and west between 0-10%. In addition to the rain showers and non-severe thunderstorms, the high winds and waves over Lake MI will come into contact with the Schoolcraft County shoreline, creating dangerous rip currents this morning into this afternoon. Therefore, swimmers should avoid getting into Lake MI today. As the low lifts away from the area later today and CAA works into the region tonight into Thursday, expect strong northwest winds over Lake Superior to bring dangerous rip currents back to the shoreline of Alger County on Thursday. Simultaneously, while the moisture aloft starts getting lost this evening, we could see some lake enhanced/upslope-forced light rain showers along and upslope from the Lake Superior shoreline. As high pressure builds into the area late this week, expect the rain showers to finally end across the area sometime late tonight or on Thursday.

Overall, expect near normal temperatures throughout the rest of this week as highs stay within the 70s. Expect dry conditions by Friday as high pressure ridging builds in and becomes maximized at around 1022mb over the Upper Great Lakes Friday morning. As we head into the weekend towards next week, expect a troughing pattern to develop over the western CONUS. Because of this, the U.P. becomes set up with Gulf air being funneled into the area, allowing warmer than normal temperatures and more humid than normal air to return to the area. With shortwaves coming in from time to time, the earliest of which likely coming in either Saturday or Sunday, we could see some much-needed rainfall across the area for the latter half of the forecast period.

AVIATION /12Z TAFS THROUGH 12Z THURSDAY/

Issued at 704 AM EDT Wed Aug 26 2026

MVFR to IFR cigs over the western two terminals this morning have finally moved into SAW as well this morning as wrap-around moisture from a Clipper low returns showers (and storms potentially over SAW) over the sites today. Given the daytime heating, expect an overall improving trend over the terminals as cigs slowly rise with time, eventually returning to VFR conditions by this afternoon and evening over the area. That being said, some IFR to LIFR cigs could return over SAW late tonight given the potential for fog/low-level stratus, but confidence on the fog/low-level stratus is low at this time.

MARINE

Issued at 248 AM EDT Wed Aug 26 2026

Southerly winds of 20 to 25 knots over northern Green Bay, northwestern Lake MI, and eastern Lake Superior dwindles to 20 knots or less late this morning as CAA starts to move into Lake Superior. As the CAA moves in, west to northwest winds of 20 to 25 knots develop over the southern half of Lake Superior today, with showers and some storms (mainly over the east half) continuing over the Upper Great Lakes until dwindling to just light showers this evening before completely ending late tonight or Thursday. Expect the northwest winds of 20 to 25 knots to become relegated to the eastern half of Lake Superior tonight before dropping below 20 knots or less on Thursday. Light winds of 20 knots or less continue over the Upper Great Lakes until a potential shortwave moves into the area on Saturday. As this shortwave arrives, expect winds to pick-up from the south over Green Bay and northern Lake MI to 25 to 30 knots by late Saturday. In addition, expect southerly winds of 20 to 25 knots to develop over the eastern half of Lake Superior by Saturday evening. Weak shortwave action looks to keep southerly winds of 20 to 30 knots across northern Green Bay and Lake MI through Sunday, before dropping to 20 knots or less again by Sunday evening.

MQT WATCHES/WARNINGS/ADVISORIES

Upper Michigan... Beach Hazards Statement through this evening for MIZ014.

Lake Superior... None. Lake Michigan... None.