Marine Weather and Tide Forecast for Fair Plain, MI

DISCUSSION
Issued at 158 PM EDT Sun Jun 7 2026

The stalled boundary over our area this morning has begun slowly moving southward. The front has completely cleared our area with the exception being White County, IN. Chances for showers and storms remain low today (20-30%) as we end up on the cool side of this boundary. With a tight instability gradient across northern Indiana, the US 24 corridor and south has the best chances, albeit low, for seeing a stray shower or storm today. Light winds and highs in the mid 80s are expected this afternoon amidst partly cloudy skies.

A developing upper level low pressure system lifts into the Upper Midwest on Monday. A few rounds of scattered showers and storms are expected across the area Monday afternoon through Tuesday. First, this upper level low will help pull the stationary front back north during the day Monday. WAA strengthens during the daytime hours on Tuesday, bringing warmth, additional rain chances, and allowing for the boundary to finally clear out.

It will then become hot and humid, especially from Tuesday onwards into late next week. As an upper level ridge builds across the eastern CONUS and surface high pressure develops over the southeast US, an early season heatwave is expected across much of the eastern US this week. Strong southerly flow will allow for heat and humidity levels to soar in our forecast area. Summer-like temperatures in the upper 80s to low 90s are anticipated with dewpoints in the low to mid 70s, especially during the peak of this early season heatwave on Wednesday and Thursday. The first 90+ degree day is likely for many locations by the end of the week. While heat and humidity begin to rise starting early this week, heat indices may approach 100 degrees during peak heating hours Wednesday and Thursday. Please take the heat seriously and take steps to prevent heat related illness!

Depending on the magnitude and exact placement of the upper level ridge, there could be daily periodic chances for rain/storms by mid to late in the week. For now, PoPs range from 20-60% each day for Wednesday and beyond with low confidence on exact timing and coverage. SPC did include much of our forecast area in their Day 5 severe outlook for Thursday, June 11th.
Models diverge on an exact solution but a cold front could move through, causing a setup where severe weather with all hazards could be possible. Pattern recognition tells me that this is often how we break our hot and humid patterns during the summertime either with a cold front or with storms that ride the edge of the upper level ridge.... Stay tuned!

AVIATION /18Z TAFS THROUGH 18Z MONDAY/
Issued at 1211 PM EDT Sun Jun 7 2026

VFR/dry with easterly winds near 10 knots through Monday morning as any shower/storm activity likely remains southwest of the terminals near a frontal zone. This front does lift back north into northern IN Monday afternoon with renewed chances for scattered convection and brief flight restrictions.

IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...None.