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LMZ846 Holland To Grand Haven Mi- 1105 Am Est Sat Dec 2 2023
Rest of today..East winds 10 to 15 knots. Cloudy. A slight chance of rain through early afternoon. Waves 1 foot or less.
Tonight..East winds 10 to 15 knots. Rain showers likely. Waves around 1 foot.
Sunday..East winds 5 to 15 knots backing northwest late in the day. Rain showers. Waves 1 to 2 feet.
Sunday night..Northwest winds around 15 knots. Mostly cloudy with a chance of rain showers. Waves 1 to 3 feet.
Monday..Northwest winds 15 to 20 knots backing west late in the day. Mostly cloudy. Waves 2 to 4 feet.
Tuesday..West winds 15 to 25 knots veering northwest late in the day. Rain showers likely. Waves 3 to 5 feet.
Wednesday..North winds around 15 knots backing northwest late in the day. Mostly cloudy. Waves 2 to 3 feet.

LMZ800
No data

FXUS63 KGRR 021728 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 1228 PM EST Sat Dec 2 2023

LATEST UPDATE...
Aviation

SHORT TERM
(Today through Sunday)
Issued at 329 AM EST Sat Dec 2 2023

Precipitation continues early this morning with I-96 acting as the demarcation line between rain and snow - snow to the north, rain to the south. For areas that are getting snow, air temps are still right around freezing but road surface temperatures are sub-freezing.
MDOT MI Drive map indicates reduced travel speeds north of I-96 and webcams confirm wet road surfaces and even a little snow accumulation north of M-46. Travel may be slick early this morning for areas north of I-96. Precipitation will gradually wind down over the next few hours as shortwave energy ejects east and deeper moisture moves away with it. Some drizzle and low clouds will stick around the rest of the day with temps warming into the upper 30s.

A shortwave embedded in a larger longwave trough will bring renewed precipitation chances early Sunday. Marginal temperatures will bring a typical rain/snow mix scenario across the area, with mainly snow north of I-96 and rain to the south. Minor winterlike impacts will be possible by Sunday with accumulations of 1-3 inches or less of wet snow possible.

LONG TERM
(Sunday night through Friday)
Issued at 329 AM EST Sat Dec 2 2023

The long term period remains unsettled with numerous precipitation chances. Temperatures will be near to slightly above normal through midweek then firmly in the above normal category to end the week.

The final in the series of srn stream systems departs late Sunday night then it appears we get a brief respite from rain/snow on Monday before another system drops in via northwest flow for late Monday night and Tuesday.

This clipper type system will have less moisture to work with than its srn stream predecessors but snow expected to be the more likely/dominant precip type as it arrives late Monday night.

Any snow accums should be on the lighter side given QPF amounts under 0.25" but there may be enough of a coating overnight to create a slick Tuesday morning commute for much of the area. The snow should change to rain or a rain/snow mix in the afternoon as temps warm well into the 30s.

Persistent longwave troughing finally departs the region midweek as ridging nudges in from the west. A push of milder air accompanies that ridging and we end the week with highs in the 40s. The warm advection pattern could produce additional bouts of light precip, although p-type should eventually favor mostly rain by Thur-Fri.

AVIATION
(For the 18Z TAFS through 18Z Sunday afternoon)
Issued at 1222 PM EST Sat Dec 2 2023

All sites are IFR to LIFR at present with cigs in the 400-700 ft range due to low stratus. The exception is at MKG where MVFR cigs are expected through tonight. Fog brings MVFR visbys late this evening across the area. Widespread rain and fog arrive after 09z resulting in IFR to LIFR visbys and cigs for West Michigan. Snow may mix in at MKG and GRR during the morning hours Sunday. Visbys climb to MVFR for the I94 terminals (AZO/BTL/JXN) at the end of the TAF window as rain becomes more scattered, though widespread IFR to LIFR cigs remain. Northeasterly winds expected today into tonight, with winds gaining a southerly component at all sites except MKG Sunday. Winds will be in the 5-10 knot range.

MARINE
Issued at 329 AM EST Sat Dec 2 2023

Offshore winds will continue to limit wave heights through the weekend. We'll see a brief uptick in wave heights into Small Craft Advisory territory Tuesday morning as winds shift northwesterly, but still no major concerns on the horizon to note.



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

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