textproduct: Marquette

KEY MESSAGES

- Additional scattered showers and thunderstorms are possible across mainly central Upper Michigan later today with minimal rainfall totals.

- Seasonable temperatures are expected through next week with the exception of slightly below normal temperatures Sunday and Sunday night.

DISCUSSION

Issued at 410 AM EDT Sat Aug 22 2026

Radar mosaic has been somewhat quiet over the last several hours with just an uptick in showers/isolated storms across the west. Latest radar mosaic shows that weak convection now moving southeastward along the WI/MI border. With limited instability, however, do not anticipate this activity to produce much rain or thunder. Later today, additional scattered showers and weak storms are possible as another cold front and shortwave drop southeast overhead. That said, CAMs are even less impressed with this round. Outside the south-central where some spots could reach up to 0.25 inches, accumulations remain below 0.1 inches. Highs will be in the upper 60s to mid 70s. Currently, ground-based obs across the area are reporting low 50s over much the interior west with visibility restrictions of 1/4 mile at both Sawyer and Iron Mountain. By daybreak, these areas could drop into the upper 40s. Elsewhere, the southern and eastern UP and Keweenaw are reporting temperatures in the upper 50s to low 60s.

Temps continue to decrease this weekend, bottoming out Sunday as a mid level trough deepens over the Great Lakes. CAA lowers 850 mb temps to between 3-6C, yielding highs in the 60s to low 70s and lows in the 40s to mid 50s. Some interior spots likely will dip back into the upper 30s Sunday night. Northerly winds are expected to gust up to 20 mph on Saturday and between 20-30 mph on Sunday, highest east...particularly near Lake Superior. High pressure moving in from the west keeps weather dry through Monday, likely through most of Tuesday as well before the next mid level trough moves through the region. This brings back shower and storm chances for Tuesday night and Wednesday, then dry weather is favored the rest of the work week.

AVIATION /12Z TAFS THROUGH 12Z SUNDAY/

Issued at 738 AM EDT Sat Aug 22 2026

Mainly VFR conditions are expected through the TAF period with the exception of some LIFR cigs at IWD and CMX through mid-morning. Elsewhere, earlier LIFR visibilities at SAW have improved to VFR. But, will carry a tempo for MVFR fog through Sat 14Z. Another front will push through the area today with increasing northwest winds behind it, bringing gusts to 20-25kt at SAW and CMX this afternoon through the evening. A few isolated showers or a thunderstorm are expected over the central UP today, but probability for rain showers is only high enough at SAW to include mention at this time.

MARINE

Issued at 348 PM EDT Fri Aug 21 2026

Lake Superior - Northwest winds behind a cold front increase on Saturday to 20-30 kts over the east half of the lake by late afternoon, strongest near the south-central shores. Gusts approach 20 kts over the west. As winds become more northerly Saturday night behind a second cold front, central lake superior winds increase to 15-25 kts; the stronger winds to 30 kts over the east persist. This holds into Sunday morning before winds gradually simmer down from west to east into Sunday night. This builds significant waves of 3-7 ft over the southeastern waters this weekend. Probabilities for gales to 35 kts are only between 15-25%, highest south of Stannard Rock and along the Marquette/Alger County shores. Winds otherwise remain below 20 kts through Tuesday before the next system brings back winds up to 20-25 kts Tuesday night into Wednesday morning.

Northern Bay of Green Bay and northern Lake Michigan - Southerly winds of 15-25 kts ahead of the cold front this afternoon drop off into this evening, becoming northwest for Saturday. Scattered thunderstorms are expected this evening, but severe storms are not expected. Winds increase to 20-30 kts this weekend as a colder airmass descends over the Great Lakes. Winds fall back below 20 kts Sunday night, remaining below 20 kts through much of next week.

MQT WATCHES/WARNINGS/ADVISORIES

Upper Michigan... Beach Hazards Statement from 11 AM EDT this morning through this evening for MIZ005-006.

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