textproduct: Marquette

KEY MESSAGES

- A chance (15-40%) for scattered light rain/snow showers today into this evening. Accumulations will be minimal with no expected impacts.

- Colder than normal temperatures continue into the weekend. Highs in the 40s to low 50s and lows in the 20s to low 30s.

DISCUSSION

Issued at 331 AM EDT Wed Apr 29 2026

The upper level pattern continues to feature large scale troughing which encompasses much of eastern Canada and the northern tier of the CONUS this morning. Cool and quiet weather prevails across Upper Michigan with temperatures generally running in the 30s across the area. Another embedded shortwave is noted upstream over northern Minnesota on GOES water vapor imagery. This feature will move overhead this afternoon, and coupled with steep low level lapse rates may produce some isolated to scattered rain showers over the western and central U.P. today. Given limited moisture, QPF will only amount to a few hundredths of an inch. Can't rule out a few snow showers mixing in if precipitation lingers into this evening once temperatures start to fall off after sunset, but would expect very minimal if any accumulation. Surface high pressure slowly builds in the rest of the week, but cyclonic flow aloft may try and squeeze out some additional spotty showers with limited precip through Thursday. By Friday, 850mb temps may be just marginally cold enough for stray lake effect showers (- 9C to -10C), but left NBM as is given the negligible impacts and low confidence. Under this pattern, cooler than normal temps are expected with highs mostly in the 40s and lows in the 20s to low 30s. Weak high pressure extending overhead on Saturday dissipates by Sunday as the now closed low spins over eastern Canada. Mostly dry weather likely persists through the weekend, but forecast confidence rapidly breaks down as models struggle to resolve the pattern progression into next week. The next shot at widespread precip likely holds off until early next week when shortwaves begin moving in from the northwest, but spread is significant. What does have better forecast confidence is the cooler than normal temps persisting into May given the persistent troughing over the region. This is captured well by the 6-10 day, 8-14 day, and 3-4 week CPC temperature outlooks.

AVIATION /12Z TAFS THROUGH 12Z THURSDAY/

Issued at 738 AM EDT Wed Apr 29 2026

VFR conditions expected through most of the period as BKN to OVC mid level cloud deck spreads into Upper Michigan in association with a weak upper level disturbance. This will bring a few spotty showers to the western half of the U.P. this afternoon/evening, but KSAW is the only terminal with high enough chances to warrant a PROB30. Winds will mostly be light but could reach around 8 kt out of the N- NW for a time later this afternoon. Latest guidance depicts lowering ceilings across the west tonight into Thursday morning, bringing MVFR conditions to KIWD and KCMX near the end of the period.

MARINE

Issued at 331 AM EDT Wed Apr 29 2026

Remaining small craft headlines in the eastern nearshore waters of Lake Superior will end by later this morning as wave heights subside below 4 feet. Benign weather is expected for the rest of the week as high pressure slowly builds in from the west. Winds remain mainly 20 kts or less through the weekend, primarily out of the north to northwest.

MQT WATCHES/WARNINGS/ADVISORIES

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