Marine Weather and Tide Forecast for Harrisville, MI

SHORT TERM /THROUGH THIS AFTERNOON/
Issued at 349 PM EDT Tue Jul 8 2025

Pattern Synopsis:

Height falls will continue to spread over the Great Lakes into tonight as shortwave troughing becomes centered over the region into Wednesday. Associated forcing aloft will help drive weak, somewhat disorganized surface pressure falls across the Great Lakes tonight into Wednesday with little existing baroclinicity and weak advections to work with.

Forecast Details:

Light showers tracking towards northern Michigan have largely dissipated over the last few hours, leaving expected rain-free weather in place for most areas through the evening. A few showers will still be possible across the eastern U.P./Tip of the Mitt and south of M-72 this evening and tonight. While model guidance widely varies, current confidence still aligns with the previous forecaster in the best chances for scattered showers and storms coming Wednesday late morning through the afternoon -- primarily along and southeast of a line from Houghton Lake to Presque Isle. While the environment isn't quite as impressive as a few days ago, PWATs in the 1.25" to 1.5" range will support efficient rainfall with any storms that form near Saginaw Bay -- potentially leading to localized torrential rainfall and rainfall totals of 1-2" in brief periods of time. With recent rainfall across this area, some hydrologic impacts cannot be completely ruled out. That said, many areas of the CWA are expected to stay dry through most of the day Wednesday with highs ranging from the mid 70s to low 80s.

LONG TERM /TONIGHT THROUGH TUESDAY/
Issued at 349 PM EDT Tue Jul 8 2025

Pattern Synopsis/Forecast Details:

Troughing will finally depart to the east Wednesday night into Thursday as ridging progresses over the region through the end of the week. Subsidence provided at the ridge/trough inflection point will build surface high pressure across the region. This will keep rain-free weather in place through Friday night, along with warming temps as highs reach into the mid to upper 80s for most on Friday.
Our next main rain chances return Saturday and Sunday as multiple waves look to pivot across the Upper Midwest and Great Lakes, bringing the potential for rounds of showers and storms at times through the weekend. Highs in the low to mid 80s are currently anticipated for most areas through the weekend, with the potential for slightly warmer temperatures to start next week.

AVIATION /06Z TAFS THROUGH 06Z THURSDAY/
Issued at 128 AM EDT Wed Jul 9 2025

Patchy BR/FG tonight, most likely mbL. TEMPOs remain as a result with IFR and lower possible. Otherwise, mostly dry conditions anticipated through Wednesday. Only exception will be across northeast lower, and thus VCSH/VCTS possible at APN during the midday to afternoon time frame. Quiet conditions otherwise, with CIGs generally SCT-BKN050-100 (exception being where FG develops). Winds northwest for most, easterly near lake huron due to the lake breeze.

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