Marine Weather and Tide Forecast for Beechwood, MI

DISCUSSION
Issued at 330 PM EDT Tue Jul 8 2025

- Showers and storms possible Through Wednesday

Large upper level low over central canada has an upper level trough extending through the upper midwest with a shortwave trough extending through Indiana to Missouri. As that trough moves through overnight it could have enough instability and mid level moisture to spark some late evening/overnight convection across lower Michigan. Some of the CAMS do show potentially 500 to 1000 J/kg of CAPE moving into Lower Michigan. This along with a nub of effective bulk shear into northern Lower could allow storms to linger and strengthen early Wednesday morning.
As that trough continues its eastward progression expect mid level instability along with level low pressure to pull up some gulf moisture and deepen, which should further aid afternoon convection. This should bring an increase of CAPE and while SPC has the area only outlooked for general thunder there is some potential for some storms to become strong, especially along and east of the US 127 corridor.

- Fair weather through the end of work week

Weak high pressure will move over the area Thursday into Friday.
This will keep any showers at bay through the end of the week.
Temperatures should rise as warm air advects into the region.
Highs could get into the low 90s by Friday afternoon.

- More widespread, organized system on Saturday

Mid to long range models remain consistent on a more widespread rain event Saturday. High pressure will be situated over the Southern US, and another High over southern California.
An upper level wave will move Eastward from the west coast, through Southern Canada. As that trough moves east, it will continue to deepens,extending into the upper Mid west by Saturday afternoon. That trough should be advecting moisture between the before mentioned high's from the Gulf of America, along with warm air. This warm, moist advection should bring 1.75 PWATS of moisture, according to the NAEFS. While not highly anomalous, it should be enough for widespread precipitation through Saturday.
That through should move quickly to the east with drier, zonal flow in its wake.

AVIATION /00Z TAFS THROUGH 00Z THURSDAY/
Issued at 722 PM EDT Tue Jul 8 2025

Scattered showers and isolated thunderstorms are forecast to develop after 02-03z and continue through the overnight hours.
Have prevailing showers for AZO/BTL/JXN where better coverage will be and VCSH for the northern terminals where it is less certain.
Cannot rule out breif periods of MVFR conditions in heavier showers but confidence is too low for TAF inclusion.

Coverage of showers and storms will increase beginning late Wednesday morning through late afternoon as a cold front crosses the area. Best chance for any showers and storms is at BTL/LAN/JXN so have included a PROB30 for thunder there with lower chances to the west. If a thunderstorm directly impacts a terminal restrictions to cigs/visbys and gusty winds are possible.
Southwest winds tonight will become northwest behind the front Wednesday afternoon.

MARINE
Issued at 315 PM EDT Tue Jul 8 2025

As the trough exits tomorrow afternoon, northerly flow should increase behind the front. There remains the potential for a stronger gradient forming along the lakeshore. As the winds shift from the northwest to the north, it could bring winds upwards of 15 to 25 kts and waves upwards of 2 to 5 feet, especially north of Grand Haven. There remains some questions of timing and strength.
So have held off on headlines for now but another set of marine/swim headlines remain possible.

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