Marion, Ohio 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

364
FXUS61 KCLE 020909
AFDCLE

Area Forecast Discussion
National Weather Service Cleveland OH
509 AM EDT Wed Apr 2 2025

.SYNOPSIS...
Low pressure system will enter the Upper Midwest from the
Central Plains this morning while lifting a warm front northeast
across the Lower Great Lakes. As the low moves northwest into
the Great Lakes region it will drag a cold front east across the
local forecast area on Thursday. A surface trough will linger
across the Ohio Valley with multiple rounds of disturbances
moving along a stationary front through the weekend.

&&

.NEAR TERM /THROUGH THURSDAY/...
Low pressure lifting out of the Central Plains and into the
Upper Midwest/Great Lakes region through the near term will
bring impactful weather to the local forecast area including:
strong to severe thunderstorms, gusty southerly winds, and
heavy rainfall.

Strong to severe storms:
Overall not much change to the SWODY1 as western zones remain
under an Enhanced Risk (Level 3/5) with a Slight Risk (Level
2/5) extending east toward the Ohio-Pennsylvania border. There
will be two distinct rounds of precipitation today and overnight
tonight. The first round of showers and isolated thunderstorms
will occur as the warm front lifts northeast across the local
area. Already beginning to see some convection developing across
Illinois and Indiana that will eventually enter Northwest Ohio
early this morning and push eastward through this afternoon.
Can`t rule out a marginal threat for some stronger storms early
this morning and afternoon given elevated instability and strong
deep-layer shear present. There should be a break in
precipitation this afternoon as showers and storms exit to the
east ahead of the main severe weather threat tonight. With this
break, there may be some clearing as mid- levels dry out as an
elevated mixed layer enters this afternoon.

By Wednesday evening, convection will develop along a pre-
frontal trough and organize into a line of strong to severe
thunderstorms. General onset timing along the I-75 corridor seems
to fall between 6 and 8 PM this evening. The primary threat
with this line of storms continues to be damaging wind gusts
with the potential for 74+ MPH gusts with more intense bowing
segments of the line. Rotating updrafts are possible with this
line given 0-1km SRH between 400 and 500 m2/s2 and deep layer
shear in excess of 60 knots. This may lead to a few embedded
tornadoes, especially along the I-75 corridor. Confidence in
damaging winds, large hail, and tornadoes remains highest across
the Enhanced Risk area with confidence decreasing in severe
weather as you move east considering the unfavorable timing
after sunset.

Gusty Winds:
As the system moves into the Upper Midwest and Great Lakes
region, a strong LLJ will enter this afternoon. Some strong
southerly winds may mix down to the surface with gusts in excess
of 40 MPH possible with any breaks in cloud cover this
afternoon. Highest confidence in gusty winds will be along and
west of I-71. Winds favoring southerly direction will lead to
downsloping in Northwest Pennsylvania and have issued a Wind
Advisory from this afternoon through Thursday morning for Erie
County, PA where 50 MPH wind gusts are possible.

Heavy Rainfall and Flood Potential:
Flood Watch remains in effect essentially along and west of I-77
from this evening through Sunday as multiple rounds of rainfall
are expected across the region. Current QPF amounts through
Thursday afternoon remain between 1 and 2 inches for much of the
forecast area. The highest flood risk will mainly occur mainly
in urban areas where thunderstorms persist this evening and
overnight.

Temperatures:
As the warm front lifts across the region this morning and early
afternoon, high temperatures will rise into the upper 60s to
lower 70s. Slightly cooler across extreme Northeast Ohio and
Northwest Pennsylvania with highs in the mid 50s to low 60s. Dew
points will also increase into the mid 50s to low 60s this
afternoon and evening. We`ll remain warm tonight with overnight
lows in the upper 50s to lower 60s. Temperatures in the mid 60s
by Thursday as cold front pushes east Thursday morning through
the late afternoon

&&

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY NIGHT/...
The latest forecast model guidance from the 00z runs have trended
slightly higher on the QPF and rainfall amounts through this weekend.
Our forecast confidence is moderate to high in regards to a multiday
heavy rainfall and flooding event, both a flash flood and river
flooding threat, to unfold across the Upper Ohio Valley region
through this weekend.

The cold front will slowly across the area  by Thursday evening.
This southwest to northeast oriented surface boundary will become
parallel to the low and mid level steering flow and stall out near
central or souther Ohio Thursday night. A deep layer southwesterly
flow aloft and strong, deep low level advecting in plentiful
moisture from the Gulf interacting with this stalled front is a
classic setup for a multiday very heavy rainfall and flooding.
Another round of convection will flare up near this stall frontal
boundary Thursday evening into the overnight. The highest POPs will be
towards central Ohio and they decrease to lower values closer to
Lake Erie Thursday night. This particular round of convection and
rainfall will not be overlay impactful for our local area but but it
will be adding up towards this long duration heavy rainfall event.

We will see a lull in the weather and lower rain chances during the
day Friday. Our weather situation will become more impactful
starting Friday evening and lasting through the weekend. A weak low
pressure will slowly track along the stalled front boundary late
Friday night through Saturday night. A strong low level jet and deep
moisture transport will be cranking in full force into this stalled
front Friday night and continue through Saturday night. Forecast
guidance has trended towards this boundary lifting northwards into
northern Ohio during this time period and the heavy rainfall threat
from strong and heavy convection will increase as well. SPC has
updated the latest day 3 outlook and now includes a portion of our
west central area  in a marginal risk for isolated severe storms
possible. That will severe weather hazard will be over shadowed by
the threat of very heavy rainfall and possibly a flash flood threat
as well as the river flood threat. The latest storm total rainfall
expected from Wednesday through late Saturday night or 12z Sunday
has increased  with widespread 4 to 6 inches across the area. There
may be some localized amounts that could be above 6 inches,
especially closer to central Ohio.

&&

.LONG TERM /SUNDAY THROUGH TUESDAY/...
The stalled front will finally get out of our region as big weather
pattern change starts developing Sunday. A strong and deep upper
level will dig down across the Great Lakes and Ohio Valley Sunday.
This pattern shift will help develop a wave of low pressure on the
frontal boundary and give it the push towards the East Coast. There
will be additional scattered rain showers with this low pressure
system Sunday and it will turn cooler as this system pulls away from
the region.

The deep upper level trough over the Great Lakes region will
continue  to dig into the Great Lakes region through Monday. The
main core or center of this very cold trough will move right over
the eastern Great Lakes  by Monday night. It will turn much colder
with scattered rain and snow showers underneath this deep upper
level trough Monday through Tuesday night. Some lake effect
rain/snow showers will be possible and impact mainly the Snowbelt
region. There could be some light or minor snowfall accumulations,
Moreno Monday night into early Tuesday.  There is some model
guidance that shows strong cold front with narrow bands of snow
showers or squalls pushing through late Monday afternoon into the
late evening. This possible scenario will be something to watch for
in future guidance and trends. The bottom line is below average cold
temperatures and light precip early next week.

&&

.AVIATION /06Z Wednesday THROUGH Sunday/...
VFR conditions early this morning will deteriorate as a warm
front lifts northeast across the region this morning and early
afternoon. Showers with the potential for some isolated
thunderstorms will impact terminals along of and ahead of the
warm front. General timing will be 12-16Z across western
terminals, 14-18Z across central terminals, and 16-20Z across
eastern terminals. Overall expecting MVFR ceilings with IFR
visibilities with the first round of showers and thunderstorms.
Can`t rule out a brief window of IFR cigs this afternoon, though
highest confidence remains confined to Northwest Ohio. There
will be a brief break in shower and thunderstorm activity behind
the warm front this afternoon and early evening with the
potential for southerly terminals to lift back to VFR.

The next round of showers and thunderstorms, with the potential
for some severe thunderstorms, will come along a pre-frontal
trough later this evening and overnight. Have timed out PROB30
groups for MVFR cigs and IFR visibilities as the line of
thunderstorms moves west to east. All severe weather hazards are
possible with the line of thunderstorms including damaging wind
gusts, large hail, and a few tornadoes.

Easterly winds 12-15 knots sustained this morning with gusts
20-22 knots will gradually turn southeasterly as the warm front
lifts across the region. Southeasterly winds increase to 15-20
knots sustained with gusts 28-32+ knots. Winds remain elevated
tonight as they favor a southerly to southwesterly component.
Terminals with the best chance of highest winds and gusts will
be FDY/TOL/MFD and ERI given the favorable wind direction for
downsloping. Winds speeds and gusts may be locally higher in any
strong to severe thunderstorm.

Outlook...Non-VFR likely Wednesday night into Thursday morning
in widespread showers and thunderstorms. Some storms may be
strong to severe Wednesday evening and overnight with a damaging
wind threat, particularly along and west of the I-77 corridor.
Non-VFR may return in showers and thunderstorms across the far
south of the area Thursday night into Friday morning. Non-VFR
more likely areawide in showers and thunderstorms Friday night
into Saturday.

&&

.MARINE...
Very unsettled and rough marine conditions are expected through this
weekend with periodic Small Craft Advisories expected . A SCA has
been issued this morning through Thursday evening due to strong gusty
winds expected. Winds will start out easterly 15 to 25 knots this
morning. Flow becomes southerly as a warm front lifts over the lake
later today with offshore winds increasing to 20 to 30 knots. Winds
from Conneaut, OH eastward may be locally higher due to downsloping
off the higher terrain of the Snowbelt  We will need to keep an eye
on the potential for a brief period of near gale-force winds during
this evening and overnight.

Winds become southwesterly at 10 to 20 knots Thursday morning before
diminishing to 12 knots or less by Thursday night. Northeast winds
may briefly increase to 15 to 20 knots late Friday into early
Saturday, but expect winds to shift to the northwest and diminish
below 15 knots by Saturday afternoon. Winds will likely increase to
15 to 20 knots Sunday.

&&

.CLE WATCHES/WARNINGS/ADVISORIES...
OH...Flood Watch from this evening through Sunday morning for
     OHZ003-006>011-017>021-027>032-036>038-047.
PA...Wind Advisory from 4 PM this afternoon to 6 AM EDT Thursday
     for PAZ001-002.
MARINE...Small Craft Advisory until 8 AM EDT Thursday for LEZ142>145.
     Small Craft Advisory from 11 AM this morning to 8 PM EDT
     Thursday for LEZ146>148.
     Small Craft Advisory from 2 PM this afternoon to 8 PM EDT
     Thursday for LEZ149.

&&

$$

SYNOPSIS...13
NEAR TERM...13
SHORT TERM...77
LONG TERM...77
AVIATION...13
MARINE...77