881 FXUS63 KGRR 260807 AFDGRRArea Forecast Discussion National Weather Service Grand Rapids MI 407 AM EDT Fri Sep 26 2025
.KEY MESSAGES...
- Fog this morning with chance of rain this afternoon
- Warmer and Drier weather ahead
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.DISCUSSION... Issued at 354 AM EDT Fri Sep 26 2025
- Fog this morning with chance of rain this afternoon
Clearing skies and light winds at the surface has provided for a better environment for fog development this morning. The dew point depression remains around zero with a very moist surface However, while periods of dense fog will occur, there is enough wind where fog will shift and visibility will improve periodically at times.The inversion is extremely shallow, which helps to explain the changing visibility, however, periods of dense fog will continue through sunrise before lifting and dissipating by mid morning.
A weak frontal boundary will sweep through northern lower and clip the US 10 corridor there is enough lift and moisture to allow for a chance of rain through central Michigan.
- Warmer and Drier weather ahead
A ridge will continue to move over head through the weekend and into next week this which will bring warmer and drier weather. Temps could reach into the 80s Sunday into next week. Expect the warm weather to continue until around mid week. An upper level trough moving through Eastern Canada could move southward through the NE US and into the Mid Atlantic, that could push the ridge westward, and cause some cold air advection that would drop Max temperatures closer to normal.
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.AVIATION /06Z TAFS THROUGH 06Z SATURDAY/... Issued at 245 AM EDT Fri Sep 26 2025
Fog has begun to develop. There remains some questions on how dense and widespread the fog will be. Have IFR for AZO/BTL/JXN where chances are better for fog development. Any fog that does develop will dissipate shortly after sunrise with a few VFR clouds and winds of 5-10 knots through the rest of the day.
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.MARINE... Issued at 354 AM EDT Fri Sep 26 2025
Conditions are expected to remain below Small Craft Advisory/Beach Hazards Statement levels the next several days as a weak gradient is in place across the area. &&
.GRR WATCHES/WARNINGS/ADVISORIES... MI...Dense Fog Advisory until 10 AM EDT this morning for MIZ056>058- 064>066-071>074. MARINE...None.
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DISCUSSION...Ceru AVIATION...Ceru MARINE...Ceru
NWS GRR Office Area Forecast Discussion