Area Forecast Discussion
Issued by NWS Grand Rapids, MI

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FXUS63 KGRR 110657

Area Forecast Discussion
National Weather Service Grand Rapids MI
157 AM EST Sun Mar 11 2018

Synopsis/Short Term/Long Term

Issued at 157 AM EST Sun Mar 11 2018

High pressure will bring fair weather today then a clipper will
track across the Great Lakes Monday and Tuesday bringing another
round of light snow and lake effect snow showers.


.SHORT TERM...(Today through Tuesday)
Issued at 157 AM EST Sun Mar 11 2018

A highly amplified pattern featuring a rex block will develop
through early week, with an upper low diving south into the
central Great Lakes. This will bring light synoptic snow along
with lake enhanced snow showers. Model soundings show no inversion
height and the DGZ is saturated, so accumulating snow is
possible, especially if lake effect bands persist for any length
of time.

Flow will be northerly behind the low confining most of
the heavier snow showers near Lake Michigan but flow goes more
northwest on Tuesday with snow showers moving inland.

.LONG TERM...(Tuesday night through Saturday)
Issued at 157 AM EST Sun Mar 11 2018

We`re going to start out with some north flow lake effect snow
showers Tuesday night that will diminish Wednesday. The deep upper
trough that`s departing the state will draw down some colder
air...h8 temps around -15c...but the north flow will confine the
snow to the lake shore areas.

High pressure then moves in from the west for a couple of days and
as heights rise, sfc temps will climb well into the 40s Thursday
through Saturday. We may see some rain Friday afternoon into
Saturday as weak low pressure moves across southern Lower Michigan.


.AVIATION...(For the 06Z TAFS through 06Z Sunday night)
Issued at 1135 PM EST Sat Mar 10 2018

Skies will be clear tonight and scattered cu expected Sunday.
Light snow will develop Sunday night but will move over the taf
sites after 06z.


Issued at 314 PM EST Sat Mar 10 2018

River levels will continue to fall over the next week. Heavy rain is
not expected, and snowmelt will be gradual.




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