Area Forecast Discussion
Issued by NWS Grand Rapids, MI

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000 FXUS63 KGRR 280130 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 930 PM EDT Tue Oct 27 2020 LATEST UPDATE... Update .SYNOPSIS... Issued at 258 PM EDT Tue Oct 27 2020 - Rain grazes far south Thursday - Cold shot Sunday into Monday && .UPDATE...
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Issued at 927 PM EDT Tue Oct 27 2020 Satellite imagery shows an are of expanding low clouds and possible fog especially for portions of Kent Montcalm and Newaygo counties. A webcams from Fremont shows thick fog. In some cases...the temperature is below freezing...so a few slick spots appear possible. We updated the forecast to include patchy fog and a risk for slick spots on the roads.
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&& .DISCUSSION...(This evening through next Tuesday) Issued at 258 PM EDT Tue Oct 27 2020 - Rain grazes far south Thursday Tropical moisture is drawn north as upper low moves east into the Ohio Valley on Wednesday. Similar to previous landfalling tropical cyclones in the central Gulf Coast, the the main slug of tropical rains is shunted well southeast of Lower Michigan with a sharp gradient across central Indiana and Ohio with the northern edge of measurable rain across our far southern zones. - Cold shot Sunday into Monday Strong cold fropa on Sunday with some snow showers possible Sunday afternoon and evening with the trough axis and cyclonic flow then quickly moderating temperatures early next week. && .AVIATION...(For the 00Z TAFS through 00Z Wednesday evening) Issued at 728 PM EDT Tue Oct 27 2020 Impacts to aviators will occur primarily this evening as IFR conditions prevail for a few hours for parts of the region. Locations along and east of a KAZO to KLAN line stand the highest chance for seeing those IFR conditions. Gradually conditions will trend toward MVFR then VFR as skies eventually scatter out from west to east across Southwest Lower MI. Some gusts up over 25 knots are possible on Wednesday...mainly closer to the lakeshore as southwest winds strengthen. && .MARINE... Issued at 258 PM EDT Tue Oct 27 2020 We will issue a Gale Warning north of Whitehall for tonight into Wednesday morning. Otherwise, the Small Craft Advisory is unchanged for the nearshore zones. Winds and waves will decrease Wednesday afternoon and evening. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. LM...Gale Warning until 8 PM EDT Wednesday for LMZ848-849. Small Craft Advisory until 8 PM EDT Wednesday for LMZ844>847. && $$ UPDATE...MJS SYNOPSIS...Ostuno DISCUSSION...Ostuno AVIATION...MJS MARINE...Ostuno

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