Frost Advisory 4, NWS Grand Rapids, MI

Area Forecast Discussion
National Weather Service Grand Rapids MI
330 AM EDT Wed May 24 2023

LATEST UPDATE...
Discussion

.DISCUSSION...
Issued at 330 AM EDT Wed May 24 2023

Cold front moves through today with little moisture to work with.
Cut POPs that were limited to begin with across the northeast
forecast area. Strong cold advection this afternoon and evening on
northeast winds will result in overnight lows dropping to near or
below freezing across the northern interior and in the mid to
upper 30s across the rest of the forecast area.

We have issued a Freeze Warning for Lake, Osceola and Clare
Counties and a Frost Advisory for all but the southern tier.
Surface high remains across the Great Lakes region through the
rest of the week with moderating temperatures but another cold
night is expected with frost/freeze potential for Thursday night
as well.

Omega block develops then transitions to a rex block, keeping dry
weather in place through early next week. It may be early June
before the pattern yields a chance of measurable rain.

&&

.AVIATION...(For the 06Z TAFS through 06Z Wednesday night)
Issued at 140 AM EDT Wed May 24 2023

VFR conditions will continue. A cold front will move though this
morning without much in the way of weather, just some mid level
clouds across central and eastern Lower Michigan with ceilings AOB
4000 feet AGL. Northeast winds behind the front will gust to 20
knots at times from late this morning through this evening.

&&

.MARINE...
Issued at 1012 PM EDT Tue May 23 2023

Some modifications have been made to the small craft advisory,
specifically south of Whitehall. While the stronger northerly
flow behind the front will firmly impact Big and Little Sable
Points on Wednesday, latest HiRes HRRR and NAMNest guidance does
not show those stronger winds impacting areas south of Whitehall.
(Keeps the stronger flow well offshore.) However, there is a
signal for strong easterly flow developing Wednesday evening in
these locations and gusting to 30 kts at times, so have simply
delayed/extended the advisory south of Whitehall to be for the
Wednesday night time frame.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Frost Advisory from 2 AM to 8 AM EDT Thursday for MIZ037-043>046-
     050>052-056>059-064>067.

     Freeze Warning from 2 AM to 8 AM EDT Thursday for MIZ038>040.

LM...Small Craft Advisory from 8 PM this evening to 8 AM EDT Thursday
     for LMZ844>847.

     Small Craft Advisory from 10 AM this morning to 10 PM EDT this
     evening for LMZ848-849.

&&

DISCUSSION...Ostuno
AVIATION...Ostuno
MARINE...Meade