Marine Weather and Tide Forecast for Marinette, WI

DISCUSSION
Issued at 1030 PM CST Fri Nov 6 2026

High pressure crossing into Saturday settles toward central Plains and Ohio Valley by Sunday. Patchy ground fog possible beneath the high tonight into early Saturday. Airmass very dry so not expecting much coverage to fog, but with temps below freezing and pavement temps dropping below freezing up north, a few slippery spots could occur.

Cold front (more of a wind shift) sweeping through late Saturday night into Sunday along with pressure rises and winds up to 35 kts in the mixed layer may push wind gusts 30-35 mph over the northwoods, with 20-30 mph elsewhere.

Highs on Sunday reach the lower to middle 50s, which is back above average. Warmer temperatures continue on Monday and Tuesday, with highs maybe reaching 60. However, probabilities for highs reaching above 60F have diminished compared to what was shown last night. Stronger cold front tied to broad upper troughing drops across the region on Wednesday, Veterans Day. Low chances for rain now showing up in the forecast on into Thursday, matching what was shown by LREF data yesterday. Not a widespread signal for precip, mainly just impacting lake effect areas of north-central and along Door County/Lake Michigan. Even on the LREF probabilities for more than 0.25 inch of precip are less than 5%, so if this occurs it looks pretty light. Hint of colder air is showing up more now into late next week, so seems could see some rain/snow or snow at times for the lake effect areas of the north as 850mb temps drop to around -8c. During this most recent cool down, 850mb temps were -4c to -6c, so could end up even cooler later next week. Extended MOS guidance from GFS and ECMWF points to this as well.

AVIATION
for 06Z TAF Issuance Issued at 1118 PM CST Fri Nov 6 2026

Skies are mostly clear this evening, except for lingering lake stratocu across Door County. Warm air advection altocu over MN will spread into central WI late tonight into Saturday morning.
Some patchy fog/stratus is possible overnight, especially across north-central Wisconsin and may affect KRHI at times. The rest of Saturday will feature mix of mid and high clouds, along with MVFR to low-end scattered cu developing in the afternoon. Clouds then increase Saturday evening with some LLWS developing across central and north-central Wisconsin as west winds just above the surface increase to 35-40 kts.

Winds will be less than 10 kts, shifting from NW tonight to WSW on Saturday.

GRB WATCHES/WARNINGS/ADVISORIES
None.