Area Forecast Discussion
Issued by NWS Grand Rapids, MI

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FXUS63 KGRR 141024
AFDGRR

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

LATEST UPDATE...
Update

.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 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 06Z TAFS through 06Z Thursday night)
Issued at 1155 PM EDT Wed Sep 13 2017

Conditions will gradually deteriorate to MVFR then IFR/LIFR
overnight due to development of low clouds and fog. Fog may become
rather dense during the early morning hours particularly from
around 09Z-13Z Thursday when visbys may drop to a quarter mile or
less with cigs potentially 500 feet.

Fog and stratus will gradually dissipate during the mid to late
morning hours Thursday when conditions will slowly improve to MVFR
and eventually VFR by midday. Wind speeds will remain below 10 kts
through Thursday evening.


&&

.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 102 PM EDT Wed Sep 13 2017

There are no hydrology concerns in the foreseeable future into
early next week. Rivers and streams continue to run below average
with the generally dry period we have seen over the past few
weeks. After the small chance of light showers today, the next
chance of rain doesn`t come until late Sunday. That rain does not
look to be anything significant at this time.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Dense Fog Advisory until 9 AM EDT this morning for MIZ037>039-
     043>045-050-051-056>059-064>067-071>074.

LM...None.
&&

$$

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



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