Area Forecast Discussion
Issued by NWS Cleveland, OH

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FXUS61 KCLE 150114
AFDCLE

Area Forecast Discussion
National Weather Service Cleveland OH
914 PM EDT Thu Mar 14 2024

.SYNOPSIS...
Low pressure and a cold front moves south through the region
later this evening and tonight. High pressure will build into
the Midwest behind the front for Friday. A low pressure system
will dive southeast across the Great Lakes region this weekend
bringing in a chilly airmass for the beginning of next week.

&&

.NEAR TERM /THROUGH SATURDAY/...
9:15 PM Update...
Trimmed the western extent and expanded the eastern extent of
Tornado Watch 44 for our region which is valid through midnight
tonight. Clusters of storms are continuing to produce large
hail and brief, isolated tornadoes. There has been a downward
trend in intensity and coverage of storms as storms enter a
region with less than favorable instability while they move
eastward. Hi-res guidance continues to indicate that storms will
continue to weaken through the rest of tonight and into the
overnight hours.

7:45 PM Update...
Tornado Watch is in effect for portions of North Central and
Northwest Ohio through midnight tonight. Areas of strong to
severe storms are continuing to move across the area with
tornadoes and large hail remaining the primary threat. Outside
of severe storms, we will continue to keep an eye on any
hydrological concerns across areas in Northwest and North
Central Ohio who have already recorded upwards of an inch of
precipitation from showers and storms earlier today.

Previous discussion...
The line of convection that has worked into the western zones has
degraded slightly sooner/further west than originally anticipated,
but still has small pockets of wind embedded within. Leftover
convection will continue the eastward push, further moving into
slightly more stable low/mid level atmosphere. The focus then turns
to the setup in the wake of this line of convection, and carefully
watching the real time observations back over northern Indiana. This
is going to give clues as to how well the atmosphere recovers.
Stationary boundary has lifted slight north as a warm front to the
northern shore of Lake Erie. Surface low continues its track east
northeastward  towards southern Lake Michigan. In the clearing,
northern Indiana temperatures are quickly recovering 4-8F with
insolation and continued southerly feed. Low level moisture
transport, particularly 925-850mb on the increase as well as is the
low level jet in general, and it appears there is a cumulus field
trying to redevelop in the clearing. Expecting the next batch of
convection to move into the western zones of the CWA after 22Z or so
with the approach of the surface/frontal boundary, and driven by a
weak open wave aloft tracking across Lake Michigan towards southern
Ontario. Limited MUCAPE should not be an issue for additional storm
formation with strong wind potential given the fast low level flows
and aided by mid level drying. 850mb winds increase to 50-60kts, and
helicity on the rise as well giving the potential for rotation. As
of 235PM while composing this, it appears the beginnings of this
next round of convection are forming via visible satellite imagery
in central Illinois. The next question will be timing the arrival of
the convection with the expected southeastward push of the frontal
boundary over northwest OH. Expecting the main convective activity to
be relegated to the southern half of the CWA heading into the
evening/late evening. Also need to watch additional rainfall for the
northwestern zones where 1.25-1.75 inches of rain have fallen
already.

High pressure after 18Z Friday into Friday ends the near term with
dry weather. Temperatures cooler Friday.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/...
A stronger cold front moves across the region on Saturday with lake
enhanced rain showers developing then continuing into Saturday
night. Rain will begin to transition to snow on Sunday as the colder
air deepens across the region. Lake effect snow should develop
Sunday night with light accumulations anticipated.

Highs Saturday should be in the 50`s. Lows Saturday dip to the 30`s.
Not much recovery on Sunday with highs in the 40`s.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
Cold air continues over the region into Monday as another strong
upper level trough moves across the region by Monday evening. Expect
to see some snow across a large portion of the region but it will
have difficulty accumulating until Monday evening after sunset. Some
lake effect rain/snow looks like it will persist across NE OH into
NW PA Tuesday Night into Wednesday.

Temperatures will be below seasonal averages Monday into Tuesday.
Slightly warmer Wednesday into THursday with highs returning to the
40`s to lower 50`s.

&&

.AVIATION /00Z Friday THROUGH Tuesday/...
Strong to severe storms are currently impacting terminals along
and south of US-224. Severe storms contain large hail, damaging
wind gusts, and a few tornadoes in discrete convection.
Generally VFR ceilings across the area outside of storms, with
reductions to cigs/vis to IFR in heavy rainfall. Have tempo
groups at terminals for IFR cigs/vis and strong wind
speeds/gusts where highest confidence in thunderstorm/convective
potential exists. Behind storms this evening, expecting a
reduction to widespread IFR/LIFR ceilings through the late
morning hours Friday morning.

Southerly winds, outside of strong winds in thunderstorms, 12-20
knots sustained with gusts 20-30 knots this evening turn
northerly through the overnight hours tonight. Northerly winds
will persist through the remainder of the TAF period, though
they should remain at or below 10 knots.

Outlook...Non-VFR expected in low ceilings continuing behind a
cold front on Friday and Friday night. Non-VFR possible in rain
showers Saturday night through Sunday before changing to snow
showers Sunday night through Monday.

&&

.MARINE...
A stationary boundary will linger near the south shore of the lake
through the evening as low pressure eventually tracks eastward along
it. In its wake a cold front will cross the region with winds
shifting to the west and northwest while increasing to 10 to 15
knots. Thunderstorms through the evening may produce locally higher
wind gusts.

High pressure briefly builds into the region Friday into Saturday.
The next cold front moves across the region at some point Saturday
evening. Southwesterly winds ahead of the front may get close to
small craft levels but as winds shift to the west they increase to
15 to 25 knots with the stronger cold air advection. These stronger
winds persist into Monday night or Tuesday with the direction
bouncing from northwest to southwest.

&&

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

&&

$$

SYNOPSIS...26
NEAR TERM...Iverson/26
SHORT TERM...MM
LONG TERM...MM
AVIATION...Iverson
MARINE...MM


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