Marine Weather and Tide Forecast for Sault Ste. Marie, MI

SHORT TERM /THROUGH FRIDAY/
Issued at 228 PM EDT Thu Apr 24 2025

Pattern Synopsis/Forecast: Early this afternoon, weak low pressure that crossed by to our north last night now sits well downstream over Quebec. Lingering stalled boundary is stretched downstate westward into the central Plains. This boundary will ultimately become the focus for upstream low pressure to ride along later tonight through Friday bringing additional wet weather to northern Michigan.

Forecast Details: Morning convection near the M-55 corridor is now well in the rear view mirror. That said, a few additional rogue showers are expected to continue over the next several hours (especially over the tip of the mitt), but certainly not expected to be long-lasting with the vast majority of northern MI remaining dry.

Focus transitions to late tonight through Friday as aforementioned low pressure organizes over the Plains and quickly tracks east through the southern Great Lakes/Ohio Valley. Some isentropically driven shower chances return as early as after 06z tonight, mainly north of M-32 across the tip of the mitt and eastern U.P. Any of this shower development gradually slides north through early Friday morning with what should be quite a bit of dry time during the day Friday across much northern lower. Additional, more numerous showers, or even steady rain arrives from west to east midday onward before clearing late day/early evening. QPF amounts late tonight through Friday ranging from up to a tenth of an inch near Saginaw Bay to 0.20-0.50" over the tip of the mitt and eastern U.P.

Lows tonight falling into the 30s far north and through the low-mid 40s across much of northern lower. A fairly notable north-south temp gradient expected again Friday with 40s north and low-mid 60s far south/near Saginaw Bay.

LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/
Issued at 228 PM EDT Thu Apr 24 2025

Pattern Synopsis/Forecast:

A stationary front will be pushed northward as a surface low pressure tracks into the region from the southwest Friday. As the low progresses across the Mitt, pressure gradients will tighten between surface high pressure building from the northwest and the aforementioned low, to support breezy conditions Friday night as well as widespread rain and perhaps a rumble of thunder or two, especially east of I-75. Aforementioned surface high pressure looks to build into the region for this weekend promoting clearing skies and warmer temperatures. Saturday's high temperatures are forecasted to be in the 50s, then trending warmer Sunday with highs in the 60s to low 70s (cooler by the lakeshores). Warming temperatures will continue into next week with forecasted highs into the upper 70s, to even perhaps the low 80s for southern locations, depending on where surface features set-up... As another system is set to impact the region early next week with additional shower and thunder chances-- SPC has surrounding areas in a 15% to 29% probability for severe weather at the beginning of next week, with guidance not overly excited about severe storms across our area, stay tuned!

AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
Issued at 656 PM EDT Thu Apr 24 2025

VFR conditions through tonight with just some passing high and mid level clouds. Cloud deck lowers and thickens Friday morning, with MVFR to IFR cigs developing through the day. Showers and mist will accompany this lowering cloud deck, although shower intensity should remain mostly light. Light winds through Friday morning, with winds trending a bit more gusty during the afternoon.

APX WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...None.