Area Forecast Discussion
Issued by NWS Cleveland, OH

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FXUS61 KCLE 192300
AFDCLE

Area Forecast Discussion
National Weather Service Cleveland OH
600 PM EST Sun Feb 19 2017

.SYNOPSIS...
Temperatures will continue to run well above normal this
week. A cold front Tuesday will not even be able to break the
streak. A stronger system Friday will bring colder air back to
the region for the weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
In general high pressure will be in control across the area
tonight. Skies will be clear through the evening and with light
winds...temperatures will fall quickly toward and after dark. The
remnants of a back door cold front will press across NY...and
this may bring cloud cover into northwest PA overnight. The bulk
of the cold air stays northeast of our area...but will likely
see temperatures dip below freezing for far eastern OH and nw
PA. Others will be in the 30s. A decent amount of drying has
taken place today and not expecting fog to be all that bad.
Confidence is low...but would be most likely across the
southern locations where dewpoints remain a bit higher.

&&

.SHORT TERM /MONDAY THROUGH WEDNESDAY NIGHT/...
The surface high will be shifting east of the area on Monday and
winds will come around from the east-northeast to the
southeast...and eventually south by Monday night. We will warm
nicely again tomorrow...with the exception of the immediate
lake shore where winds will remain northeast. Another spread of
upper 40s near the lake...upper 50s for most...and a few spots
hitting 60. Southerly flow Monday night will keep areas warmer
than the night before.

There is a cold front Tuesday. It has remained on target for the
daytime hours. Most of the guidance brings showers into Toledo
in the morning...midday Cleveland Mansfield and takes showers
across the eastern part of the area in the afternoon. Coverage
still does not warrant higher than 60 or maybe 70 percent. Bulk
of the upper support will be north of the area. Will still go
above guidance temperatures. There will be time for the
central/eastern areas to warm well. Guidance has been running
cool too...as would be expected in a unseasonably warm regime.
There is room though for those temperatures to not pan out...but
it will not be too far off.

Again no real cold air behind the front and with high pressure
returning to the Ohio Valley...a southwest flow will mean
another really warm day. Made no change to the mid/upper 60s we
had going.

&&

.LONG TERM /THURSDAY THROUGH SUNDAY/...
Ridging is progged to continue across the area and our spring
pattern will continue into late week. One of the west coast storms
will dig across the southern Rockies mid week and lift out late in
the week.

In the meantime, the models are coming more into agreement of a weak
front, or at least frontogenesis, across the lower Great Lakes on
Thursday. Not sure how much rain might occur but will include at
least a chance or slight chance of showers in most areas. Warm
frontogenesis will occur Thursday night into Friday. The warm front
should move north of the area on Friday in the increasing south
flow. Again, not very confident on the amount of showers that will
occur. We will likely break into the warm sector for a while and I
suspect Friday will become very warm, perhaps nearing 70 again in
many areas.

The models have been suggesting the passage of the strong cold front
will come between late Friday afternoon and about midnight or so
Friday night. Will have higher pops for the frontal passage and will
include thunder and wind.

Colder and blustery on Saturday. Temperatures will likely drop back
to near normal. It will be colder aloft and could see a few
snow/rain showers, especially downwind of Lake Erie in the wrap
around moisture with the trough aloft. High pressure should build in
on Sunday.

&&

.AVIATION /00Z Monday THROUGH Friday/...
The weak cold front should settle over the central part of the area
tonight. Not expecting any cloudiness with the front but the weak
convergence associated with the front may aid in helping some
surface moisture pooling over our southern airports tonight.
Dewpoints have dropped late today as the airmass has mixed with the
daytime heating and not sure if the weak frontal boundary will be
enough to pool moisture to the point of having a lot of fog form
like last night. Will take a middle of the road approach and go for
some fog late tonight in the south with only a few hours of possible
ifr for fdy and mfd where wind direction should loose the northerly
component by the end of the night. Also, the cirrus moving in from
the west should help limit fog development.

Generally expect partly cloudy skies on Monday once we evaporate the
fog in the south with patches of high clouds and a light east to ne
wind.

OUTLOOK...Non-VFR may develop Tuesday and continue into Tuesday
night. Non-VFR will develop again Thursday or Thursday night and
continue at times Friday.

&&

.MARINE...
Have had some brisk west winds over the central basin this afternoon
in the vicinity of a weak cold front dropping across the south shore
of Lake Erie. Those winds will diminish quickly and veer north and
then east tonight and Monday as high pressure slides east across the
Great Lakes.

The next cold front is due later Tuesday. South to southwest winds
will pick up nicely ahead of the front and become southwest to west
behind the front. Not expecting enough wind for a small craft
advisory.

A light to moderate southwest flow will persist until the next front
drops across the lake on Thursday. Then winds will veer northwest
Thursday but come quickly around from the southeast on Friday as low
pressure tracks across the plains.

The low will be a significant storm system as it tracks across the
northern Great Lakes Friday into Friday night pushing a strong cold
front across Lake Erie Friday night.

&&

.CLE WATCHES/WARNINGS/ADVISORIES...
OH...None.
PA...None.
MARINE...None.

&&

$$
SYNOPSIS...Oudeman
NEAR TERM...Oudeman
SHORT TERM...Oudeman
LONG TERM...Kosarik
AVIATION...Adams
MARINE...Kosarik


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