Area Forecast Discussion
Issued by NWS Cleveland, OH

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786
FXUS61 KCLE 210937
AFDCLE

Area Forecast Discussion
National Weather Service Cleveland OH
437 AM EST Sat Jan 21 2017

.SYNOPSIS...
With a warm front now to our north...the area will remain mild for
several more days. An initial cold front will cross the area
Sunday night with a stronger low and cold front tracking across
the Great Lakes Wednesday. This will begin to bring us back closer
to normal readings for this time of year by the end of the week.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
The dense fog has begun to lift as expected. A few breaks in the
overcast have allowed for some patchy fog to hold for a few
inland locations. Meanwhile have retained the dense fog advisory
for the far east lakeshore. It is looking likely that this will be
allowed to expire as scheduled with conditions continuing to
improve.

We may get a sprinkle or two this morning...but even this is not
looking likely enough or impactful enough to even mention for
today. There will likely be a few breaks in the overcast later to
make for quite a pleasant day by January`s standards. Expecting
highs to reach well into the 50s and likely touching 60. Mansfield
record high of 58 degrees and Youngstown of 59 degrees are both in
jeopardy of being broken while other sites records are all in the
mid to upper 60s.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY NIGHT/...
A significant trough will begin to emerge from the desert
southwest today...making its way across the southern plains and
Gulf coast states/Tennessee Valley through the remainder of the
weekend. Minor impulses in the southwest flow aloft may bring a
few rain showers to the area later tonight into Sunday morning.
Areas of fog a possibility again tonight.

Better/deeper moisture arrives later Sunday and more so for
Sunday night and Monday. Still discrepancies in low
placement...at the surface and aloft. But yesterday afternoons
runs and todays track the low across the Virginia to the east
coast...a bit further north than 24 hours ago. This extends a
trough up across the upper Ohio Valley. Agree with the favorable
set up for showers...most widespread and heaviest rainfall would
occur Sunday night and Monday. As far as rainfall amounts are
concerned...we may end up having a few minor river flooding
issues. But QPF continue to vary. By the second half of Sunday
winds begin to back to the northeast across northwest OH...off of
the cool lake. High temperatures will be limited by this and
rainfall across the east...keeping us in the 40s Monday. A few wet
snowflakes may begin to mix in toward Tuesday morning. Precip
chances taper for Tuesday as a brief ridge takes the place of the
departing east coast low.

&&

.LONG TERM /WEDNESDAY THROUGH FRIDAY/...
Storm system will move through the Central Great Lakes on Wednesday.
We will start the day in the warm sector with scattered showers
anticipated. A cold front will sweep eastward with the low by
Wednesday evening with cooler air spilling across the region in its
wake. It will be colder but 8H temperatures only dip to around -6.
So there will be a gradual transition to some snow late Wednesday
night into Thursday. We will have to wait for another upper level
trough to cross the Central Great Lakes on Friday before the coldest
air arrives. So expect to see snow showers continue into Friday. The
better accumulating lake effect snow looks like it may occur Friday
night into Saturday.

Wednesday will be the warm day of the long term with highs in the
upper 40s to lower 50s. Cooler Thursday into Friday with highs
remaining in the 30s.

&&

.AVIATION /06Z Saturday THROUGH Wednesday/...
Lot`s of challenges tonight. Dense fog continues to spread inland
and a prolonged period of IFR to LIFR conditions is expected at
the northern TAF sites overnight. Conditions may try to improve in
a few hours as a warm front lifts across the area but would not
bet on it. Further south skies have actually cleared and expect
fog and stratus to begin to fill in overnight. Winds will pick up
after daybreak and should see conditions begin to improve although
it may take much of the morning at KERI. By 18z or so expect most
of the area to be VFR.

OUTLOOK...Non-VFR persisting through much of saturday. Non-VFR
developing again Sunday continuing Monday. Non-VFR will likely
persist on Tuesday NE OH/NW PA.

&&

.MARINE...
Southerly winds are expected today with high pressure moving off the
East Coast. We will then monitor the track of low pressure that is
expect to move from the Southern Plains on Sunday to near the Upper
Ohio River Valley on Monday. This should produce East to northeast
winds which are expected to increase in speed Sunday night into
Monday. The strongest winds will likely be Monday into Monday night.
Current thinking keeps winds below gale force but a small craft
advisory seems likely from Geneva-on-the-lake to the Western Basin
of Lake Erie. We will have to monitor for high water across the
western basin. At this point it doesnt appear we will push water
levels up high enough to issue any headlines but anyone with
interests across the western basin will see higher than normal water
levels.

Winds will decrease by Tuesday with a brief lull between storm
systems. The next storm system is forecasted to move into the
Central Great Lakes on Wednesday with an increasing southwesterly
wind ahead of it. As the low passes Wednesday evening winds will
shift to the west and increase.

&&

.CLE WATCHES/WARNINGS/ADVISORIES...
OH...Dense Fog Advisory until 5 AM EST early this morning for
     OHZ089.
PA...Dense Fog Advisory until 5 AM EST early this morning for
     PAZ001.
MARINE...None.

&&

$$
SYNOPSIS...Oudeman
NEAR TERM...Oudeman
SHORT TERM...Oudeman
LONG TERM...Mullen
AVIATION...Kubina
MARINE...Mullen



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