Area Forecast Discussion
Issued by NWS Grand Rapids, MI

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FXUS63 KGRR 122358

Area Forecast Discussion
National Weather Service Grand Rapids MI
758 PM EDT Mon Mar 12 2018


Issued at 330 PM EDT Mon Mar 12 2018

Lake effect snow showers will develop overnight and continue
through Tuesday evening before tapering off. Fair weather will
return for mid to late week.


.SHORT TERM...(This evening through Wednesday night)
Issued at 330 PM EDT Mon Mar 12 2018

Light snow showers and flurries will linger late this afternoon
and evening but with no snow accumulation. A few sprinkles are
possible as well.

Nnw flow lake effect snow showers will develop overnight as h8
temps fall to -12 to -14 C by 12Z Tue. The lake effect snow
showers will then continue Tuesday into Tuesday evening. There
will be decent low to mid level moisture along with inversion
heights briefly up to around 8-9 kft agl. Lake induced instability
will be ample with delta t/s reaching the upper teens to lower

We expect snow showers to become more cellular in nature during
the daytime hours tomorrow with some diurnal heating. They will
also spread a little further inland but with less focus as low
level wind speeds ramp up to around 15-20 kts. Snow showers will
linger Tuesday night before gradually ending during the early
morning hours Wednesday as h8 temps moderate.

Snow accumulations of around 1 to 3 inches are expected in favored
NNW flow portions of our lakeshore counties from late tonight
through Tuesday evening. Relatively highest amounts within that
range are most probable in western Mason... western Oceana and
western Van Buren counties.

Lighter accumulations of around an inch or less are fcst further
inland. Fair wx will return Wednesday as a mid level ridge builds
in from the northwest.

.LONG TERM...(Thursday through Monday)
Issued at 330 PM EDT Mon Mar 12 2018

Fairly quiet weather is expected in the long term period.
Temperatures will be near normal through the period. Some very light
snow showers are possible from Thursday into Friday with some colder
air that will still be hanging on. 850mb temperatures warm into the
weekend with high pressure building in for Friday into Saturday. Dry
weather is forecast over the weekend for the most part. There is a
front centered around the Saturday night time frame that may bring a
few rain or snow showers to Central Lower Michigan. Timing
differences make for a lower confidence forecast with this front.


.AVIATION...(For the 00Z TAFS through 00Z Tuesday evening)
Issued at 758 PM EDT Mon Mar 12 2018

Scattered, but locally intense, snow showers over the next 24
hours will produce occasional/brief IFR or lower vsbys. Outside of
snow showers VFR conditions will prevail the majority of the
time. The snow showers should be a bit more persistent/frequent
along the Lake MI shoreline including the MKG terminal. Northwest
winds will fall below 10 kts tonight but then increase again to
12-22 kts and gusty by late morning Tuesday.


Issued at 330 PM EDT Mon Mar 12 2018

River levels will continue to fall this week. No heavy precipitation
is forecast and snowmelt will be gradual.




SHORT TERM...Laurens
HYDROLOGY...Laurens is the U.S. government's official web portal to all federal, state and local government web resources and services.