textproduct: Marquette

KEY MESSAGES

- Dry weather today will be followed by additional showers and storms on and off through midweek. Strong to severe storms are not expected.

- Temperatures come in near to slightly below normal through the rest of the forecast period.

DISCUSSION

Issued at 232 AM EDT Mon Aug 10 2026

Early morning GOES WV imagery indicates a broad troughing pattern across central and eastern Canada and ridging centered over the Four Corners, while in between, we are under mainly zonal flow over the Great Lakes. Apart from some patchy fog developing early this morning, skies remain mostly clear with weak surface ridging over the UP. Fog mixes out after sunrise, then expect mostly sunny skies followed by increasing clouds overnight into Tuesday. Temperatures peak in the 70s across most of the area, and in the lower 80s across the south-central UP. Expect lows in the 50s by early Tuesday.

The rest of the week sees a slow trend to slightly cooler than normal temps as highs trend toward upper 60s to mid 70s for the end of the work week with lows in the 40s to mid 50s. Shortwaves Tuesday and Wednesday yield chances for showers and storms (25-50% chance) with plenty of timing/coverage uncertainty. Bulk shear will be strong, but instability is not forecast to be very impressive so severe weather is not expected at this time. Finally the broad Canadian troughing pattern breaks down late this week and stronger high pressure returns to the Great Lakes, favoring drier weather into the weekend. PoPs return late Saturday into Sunday as ensembles track a low pressure system into the region.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 713 AM EDT Mon Aug 10 2026

Patchy fog and low stratus across the UP lifts over the next hour, then expect sunny skies and VFR conditions the rest of the forecast period. There is a potential for additional fog and MVFR/IFR restrictions at IWD and SAW early Tuesday morning, but confidence is low. Otherwise, expect winds to turn to the NW today, coming in below 10kts, before turning light and variable again tonight.

MARINE

Issued at 232 AM EDT Mon Aug 10 2026

Winds and gusts on Lake Superior generally remain below 20 kts through the forecast period as weak pressure gradients are expected. The main concern is patchy fog tonight, which may be dense at times, but confidence in coverage and persistence in fog is too low for any headlines.

Southwest winds shift more to the NW by daybreak, holding at around 10kts the rest of the day. Winds and gusts generally remain 15 kts or less the rest of the forecast.

MQT WATCHES/WARNINGS/ADVISORIES

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