textproduct: Marquette

KEY MESSAGES

- Breezy conditions over Lake Superior yesterday into last night are resulting in dangerous swimming conditions on the beaches east of Marquette County today. A Beach Hazard Statement is in effect for Alger County until 5 PM EDT today.

- Generally dry weather is expected the rest of the work week, though the UP may be grazed by showers Thursday night into Friday morning. Our next rain chances will return this weekend.

- Somewhat normal temperatures today will be followed by a warming trend into the weekend.

DISCUSSION

Issued at 229 AM EDT Wed Jul 22 2026

Cool and almost early Fall-like temperatures are being seen across the U.P. this morning as observing stations are already reporting temperatures in the mid-40s. With mostly clear skies continuing through the rest of the pre-dawn hours, we could see a few spots bottom-out and dip into the upper to maybe even mid 30s! Otherwise, outside of the interior west, expect the rest of the U.P. to bottom out in the 40s (maybe the lower 50s over the Keweenaw).

Continuing into today and the rest of the work week, expect generally calm weather and mostly sunny skies as high pressure ridging moving through today flattens out and eventually leaves towards New England for the latter half of the work week. Behind the ridging moving through, warm air advection moves into the area. Thus, expect a general warming trend from around to just-below normal temperatures today to above well above normal temperatures by this weekend.

Outside of a less than 10% of rain showers/storms skirting the area Thursday night into Friday, rain chances look to finally return on Saturday as a cold front drops through the area. With 1 to 3 kJ/kg of MUCAPE potentially available and 0-6 km bulk shear around 30 to 40 kts, some severe weather could be seen on Saturday with the cold front's passage. With another front/shortwave potentially moving through on Sunday into Monday morning and atmospheric shear and potential energy remaining high, additional severe weather chances are possible. Precipitation chances finally look to end as we head into the middle of next week as high pressure ridging amplifies over the central CONUS and another back door cold front moves down from northern Ontario.

One final note worth mentioning: given the strong winds over Lake Superior yesterday and last night, high waves are still creating dangerous swimming conditions across the Lake Superior beaches east of Marquette County this morning into this afternoon. While the waves and rip current risk will decrease, dangerous swimming conditions are looking to remain until the late afternoon hours (around 5 PM EDT) over Alger County and Luce County until sunset this evening. Therefore a Beach Hazard Statement has been issued for Alger County until 5 PM EDT today.

AVIATION /06Z TAFS THROUGH 06Z THURSDAY/

Issued at 650 AM EDT Wed Jul 22 2026

VFR conditions continue through the period as high pressure ridging moves through the area. Expect NW to N'rly winds today, becoming W to SW'rly by tonight.

MARINE

Issued at 229 AM EDT Wed Jul 22 2026

Northwest winds of 20 to 25 knots over the eastern half of the lake continue through today, before west to west-southwest winds pick up late this afternoon as the high pressure ridging peaks across the area and winds increase to 20 to 25 knots over the central lake. However, as the high pressure ridging begins to flatten and head east towards New England for the latter half of the work week, expect the winds tonight to drop down to around 20 knots or less. However, with a weak shortwave low moving over the northern lake on Thursday, expect southwest winds of 20 to 25 knots to return to the western half of the lake throughout the day. As another weak shortwave skirts over the northwestern portion of the lake on Friday, expect winds to once again increase to 20 to 25 knots from the southwest over mainly the western half of the lake; some showers and thunderstorms are possible Thursday night into Friday as well. With a cold front approaching from the west (arriving on Saturday morning), winds intensify from the south and southwest over the lake to 25 to 30 knots Friday night, before dropping down to 20 knots or less behind the cold front by Saturday afternoon; while not expected at this time due to an inversion above the marine layer, a few gale force gusts up to low-end gale (i.e. 34 knots) cannot be completely ruled out Friday night into Saturday morning over the western lake (up to a 15% chance according to the latest LREF). In addition, with some potential energy to work with as well as strong bulk shear within the atmosphere, some severe weather is possible Friday night into Saturday morning across the lake (mainly the west half). While a warm front/shortwave moving into the region on Sunday could bring additional storms with some potentially being severe (most likely over the western half of the lake), the winds look to remain 20 knots or less at this time; the light winds look to remain through the early part of next week.

MQT WATCHES/WARNINGS/ADVISORIES

Upper Michigan... Beach Hazards Statement until 5 PM EDT this afternoon for MIZ006.

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