Area Forecast Discussion
Issued by NWS Grand Rapids, MI

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727
FXUS63 KGRR 250730
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
330 AM EDT Wed Apr 25 2018

LATEST UPDATE...
Synopsis/Short Term/Long Term/Marine

.SYNOPSIS...
Issued at 330 AM EDT Wed Apr 25 2018

The passage of a cold front this morning will end the threat of
showers and be followed by breezy and cool conditions today. High
pressure will provide a sunny and pleasant day Thursday with
lighter winds before another cold front on Friday brings our next
chance of showers. Cool weather with highs in the 50s will
prevail behind this front over the weekend, but a significant warm
up with highs in the 70s will follow for early next week.

&&

.SHORT TERM...(Today through Friday)
Issued at 330 AM EDT Wed Apr 25 2018

A few rain showers will remain possible through daybreak with the
mid level trough and sfc cold front still coming through.
Surprisingly sfc dew pts are around 50 early this morning ahead of
the front, which currently extends from about Mt Pleasant to
Muskegon.

North winds will drive in much drier air behind the front and dew
points will fall into 30s. This will scour out the low clouds
this morning, but a broken diurnal cumulus deck should impact
areas east of Highway 131 this afternoon with thermal troughing
and residual moisture progged at 850 mb.

High confidence for a sunny day with light winds on Thursday as
the sfc high slides through. Highs are expected to reach the
lower 60s, which is about normal for this time of year.

Next cold front/upr trough has little moisture and brings only
light precip amounts/chance pops late Thursday night and Friday.
Main impact of this next front will be to usher in more chilly
weather for a couple days.


.LONG TERM...(Friday night through Tuesday)
Issued at 330 AM EDT Wed Apr 25 2018

A strong upper level disturbance moving in from the northwest will
bring scattered light rain showers Friday night. A few wet snow
flakes may mix in overnight north of I-96. After that high pressure
will build in to bring fair and seasonably cool wx this weekend.

Temps will undergo a significant moderating trend early next week as
strong south to sw flow warm air advection develops on the back side
of the departing ridge. High temps of around 70 degrees are
anticipated for Monday and temps will reach well into the 70s by
Tuesday.

Persistent sw flow waa will allow high temps to reach the middle 70s
to near 80 degrees again Wednesday. The continued sw flow will also
result in a gradual increase in moisture and some showers and
thunderstorms are possible late Tuesday night into midweek.

&&

.AVIATION...(For the 06Z TAFS through 06Z Wednesday night)
Issued at 1145 PM EDT Tue Apr 24 2018

A mix of MVFR/IFR conditions will gradually improve to VFR
overnight through mid morning and low clouds gradually dissipate
and exit. VFR conditions will then continue through the day
Wednesday and Wednesday evening. Northwest winds will ramp up to
around 10-20 kts late Wednesday morning through the afternoon with
highest gusts at KMKG.


&&

.MARINE...
Issued at 330 AM EDT Wed Apr 25 2018

No changes to the Small Craft Advisory as period of 15-25 kt
northerly flow through this evening leads to rough conditions on
Lk MI. Winds and waves subsiding overnight and followed by more
tranquil conditions on Thursday. Wind and wave could reach
hazardous levels again on Friday behind the next cold front.

&&

.HYDROLOGY...
Issued at 321 PM EDT Tue Apr 24 2018

With no significant precipitation expected, river stages will
continue to fall and the 5 current advisories should be able to be
dropped relatively soon.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
LM...Small Craft Advisory until 8 PM EDT this evening for LMZ848-849.

     Small Craft Advisory until 2 AM EDT Thursday for LMZ844>847.

&&

$$

SYNOPSIS...Meade
SHORT TERM...Meade
LONG TERM...Laurens
AVIATION...Laurens
HYDROLOGY...TJT
MARINE...Meade



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