textproduct: Marquette

KEY MESSAGES

- A brief period of dry weather is expected for most of the day, then another batch of showers moves through the UP beginning early this evening. Some thunder is possible closer to the WI border.

- Scattered showers and isolated thunderstorms will be possible at times into early next week, but severe weather and heavy rainfall are not expected, and it's not likely that any day becomes a washout.

- Temperatures remain below normal this into early next week.

DISCUSSION

Issued at 247 AM EDT Fri Jun 19 2026

Stubborn troughing extending from midlevel low pressure over northern Ontario will continue to govern our weather through the weekend. Currently, water vapor and RAP analysis highlight a shortwave traversing Lake Superior. This has touched off some weak radar returns over the Keweenaw and north-central UP, though little if any accumulations are expected with the main impacts being an increase in cloud cover. Elsewhere, skies remain mostly clear. Temperatures hover in the upper 40s and lower 50s so far, but should bottom out in the mid 40s for most early this morning.

Heading into the daytime hours, shortwave ridging will bring about a period of dry and sunny weather with temperatures peaking in the upper 60s to near 70 across much of the area. Another weak shortwave tracks from MN into northern WI by the early evening, potentially driving another round of scattered showers through the UP during the evening and overnight hours into Saturday morning. Some rumbles of thunder are not out of the question with a few hundred j/kg of CAPE, but strong storms are not expected. As we look ahead into the weekend, CAM ensembles hint at lake breeze driven convection Saturday afternoon, largely across the "Golden Triangle" of the central UP. Sunday looks to remain dry in our neck of the woods.

The seemingly endless period of troughing begins to break down early next week into the midweek period, allowing more zonal flow aloft and the passage of additional shortwaves from the northern Rockies to emanate into the region. Chances for more widespread meaningful rainfall (25-50% of >0.25") returns in the Tuesday-Wednesday timeframe.

AVIATION /12Z TAFS THROUGH 12Z SATURDAY/

Issued at 717 AM EDT Fri Jun 19 2026

VFR conditions and light winds are expected to prevail at SAW and CMX throughout the forecast period. At IWD, a batch of showers moves through during the late afternoon and evening. Behind this, ceilings drop to MVFR and then IFR after 06Z Saturday.

MARINE

Issued at 247 AM EDT Fri Jun 19 2026

NW winds continue to gust to around 20-25 kts over the eastern half of the lake early this morning, but finally falling below 20 kts lakewide this evening while backing to the W and SW. A period of calmer winds <15 kts is expected through the rest of the weekend and into the coming week.

MQT WATCHES/WARNINGS/ADVISORIES

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

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