Area Forecast Discussion
Issued by NWS Grand Rapids, MI

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FXUS63 KGRR 141449
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
1049 AM EDT Thu Sep 14 2017

LATEST UPDATE...
Hydro

.SYNOPSIS...
Issued at 317 AM EDT Thu Sep 14 2017

Areas of dense fog will lift this morning and high pressure will
bring fair weather through the end of the week. The next chance
for rain will be on Sunday afternoon as a cold front approaches.

&&

.UPDATE...
Issued at 916 AM EDT Thu Sep 14 2017

Fog is gradually becoming less dense and more patchy in coverage.
Spots particularly around I-94 and I-96 may still see some dense
fog through 10 AM, but the expectation is for continued
dissipation. We have allowed the Dense Fog Advisory to expire as
coverage continues to shrink.

UPDATE Issued at 624 AM EDT Thu Sep 14 2017

Areas of dense fog have expanded from Muskegon to Ludington and
over to Big Rapids, so we will add all but the NE zones to the
advisory....running through 9 AM.

&&

.SHORT TERM...(Today through Saturday)
Issued at 317 AM EDT Thu Sep 14 2017

WE have issued a dense fog advisory until 9 am for the southern
half of the forecast area as a few sites have already dropped to
one quarter mile visibility and fog should become more widespread
through daybreak. Fog may return once again after midnight.

Otherwise, no weather impacts in the near term as sfc and upper
ridging dominate the scene across the Great Lakes. Superblend
maxes looked too low for today and were adjusted up a couple
degrees. Min temps look reasonable.

.LONG TERM...(Saturday night through Wednesday)
Issued at 317 AM EDT Thu Sep 14 2017

Unseasonably warm weather will continue through the long range
forecast period. Fair weather will continue Saturday night into
Sunday. A weak cold front will bring potential for a few rain
showers from late Sunday and Sunday night into Monday.

It will remain mild behind this system for early to mid next week.
High temperatures will reach well into the 70`s Monday and Tuesday
and into the upper 70`s to lower 80`s by Wednesday with fair weather
as another high pressure ridge builds in. In fact the unseasonably
warm weather will continue late in the week.

&&

.AVIATION...(For the 12Z TAFS through 12Z Friday morning)
Issued at 728 AM EDT Thu Sep 14 2017

Fog will bring LIFR and IFR conditions early this morning then
gradually dissipate between 13Z to 16Z. VFR conditions are
expected through this evening. Winds will be from the southwest
below 10 knots. More fog is expected to develop tonight with IFR
and areas of LIFR by 12Z Friday.


&&

.MARINE...
Issued at 317 AM EDT Thu Sep 14 2017

Winds and waves will remain relatively light through the next
couple days. No rain is expected until late in the weekend when
there is a chance of showers and thunderstorms Sunday afternoon.


&&

.HYDROLOGY...
Issued at 1049 AM EDT Thu Sep 14 2017

River and stream flows across the area remain at or below average
for this time of the year due to the recent dry conditions. This
will continue to be the case with very little rainfall expected
over the next week, and likely beyond.

&&

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

$$

UPDATE...TJT
SYNOPSIS...Ostuno
SHORT TERM...Ostuno
LONG TERM...Laurens
AVIATION...Ostuno
HYDROLOGY...NJJ
MARINE...Ostuno



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