Flash Flood in Ohio, July 16, 2025

Area Forecast Discussion
National Weather Service Cleveland OH
407 PM EDT Wed Jul 16 2025

.SYNOPSIS...
A cold front will move east through the area on Thursday and
linger across the Ohio Valley as high pressure builds from the
north on Friday. This front will gradually lift back north on
Saturday, followed by a cold front on Sunday. High pressure will
build back into the area on Monday.

&&

.NEAR TERM /THROUGH THURSDAY NIGHT/...
Main concern for the near term period will be heavy rain from
thunderstorms and the potential for flash flooding through this
evening. Overall, confidence in any widespread flash flooding
appears to be decreasing, with any flash flooding concerns
through this evening likely only confined to urban areas,
driven by rate-driven heavy rain. Recent radar trends and
satellite imagery suggest that the most organized convection
through this evening will occur across Northeast Ohio and
Northwest Pennsylvania with PWATs ranging between 2 and 2.20
inches. Elsewhere, mid-level dry air and weak flow may limit
storm organization leading to a lower flooding risk, albeit with
seasonably-high atmospheric moisture content.

Shower and thunderstorm coverage should gradually diminish
following sunset as the shortwave responsible for the earlier
convection moves east into Pennsylvania. Later this evening and
overnight, a stronger low pressure system will move northeast
through the Central Great Lakes, extending a cold front across
the area on Thursday. Can't rule out some scattered showers with
isolated thunder chances, though for the most part, this
appears to be a mostly dry frontal passage, with redevelopment
expected further south across the Ohio Valley by the afternoon.

&&

.SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/...
Main concern for the short term period will be heavy rain and
flash flooding potential from thunderstorms late Saturday and
Saturday night. Aloft, an upper-level trough will move east
through the Upper Great Lakes while a ridge develops and builds
across the Deep South. A favorable environment for heavy rain
will be in place across the Lower Great Lakes region, with
PWATs once again approaching 2.0 inches in the vicinity of a
stationary front. WPC currently has much of the area in a slight
risk (level 2 out of 5) for flash flooding. There is currently
no SPC outlook at this point for Saturday, though could
certainly see future inclusion if model trends persist. Will
continue to monitor the potential over the next few forecast
iterations.

Otherwise, Friday will bring a welcome relief from the Summer
Heat behind Thursday's cold front as high pressure briefly
builds south across the Great Lakes. Temperatures will be
slightly below average with highs in the upper 70s to lower 80s
and dew points in the lower 60s to perhaps upper 50s.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
Main concern for the long term period will be the return of the
heat by Tuesday and Wednesday. The latest ensemble probabilities
depict low chances (10 to 30%) for Heat Indices to exceed 100
degrees, mainly across the western half of the area as a strong
upper-level ridge builds across the Deep South and expands
northwards into the Ohio Valley. Will continue to monitor the
developing heat potential over the next several forecast
iterations.

Otherwise, high pressure will briefly build in from the north by
late Sunday into Monday, leading to seasonable temperatures in
the low to mid-80s. Humidity levels will gradually increase on
Tuesday and Wednesday with dew points approaching the low to
mid-70s.

&&

.AVIATION /18Z Wednesday THROUGH Monday/...
SHRA and TSRA will impact most terminals during the first six
hours of the period, as a shortwave currently near KDAY moves
northeast across the region through the evening. TSRA activity
is mostly unorganized, but the best chances for prolonged TSRA
activity will be KYNG, KCAK, and possibly KCLE, with IFR vis
restrictions and gusts to 30 kts possible with any TSRA. TSRA
activity will diminish diurnally near/after 00Z.

Another wave and surface low will move east through the Great
Lakes tonight into Wednesday pushing a cold front southeast
towards the area. Some MVFR ceilings possible where cloud cover
persists overnight, with mixing/lifting of any ceilings after
12Z with diurnal mixing. Winds will generally be south/southwest
through the period, increasing and becoming westerly Thursday
as the cold front nears the area. Some gust to 20-25 kts
possible during the day Thursday.

Outlook...Non-VFR possible in lingering showers and
thunderstorms across the south and southeast portion of the area
Thursday afternoon and evening. VFR expected Friday before Non-
VFR chances return Saturday and Sunday in scattered showers and
thunderstorms.

&&

.MARINE...
Opted to issue a small craft advisory for Thursday into Thursday
night given high confidence, as west winds sharply increase late
tonight into Thursday as low pressure moves just north of the
lake. Winds of 20-25 kts expected Thursday, although the window
is rather brief for the western basin. A cold front pushes
southeast across the lake behind the low, with winds becoming
northerly in the 10-20 kt range, with waves reaching small craft
criteria expected to continue in the central basin through
Thursday evening. Winds and waves will subside into Friday as
high pressure builds across the region. Winds and waves will
generally be light through Saturday before another low moves
near the lake, with some increased westerly winds in the 10-15
kt range. This will be brief before winds become easterly Monday
as high pressure builds across the Great Lakes.

&&

.CLE WATCHES/WARNINGS/ADVISORIES...
OH...Beach Hazards Statement from Thursday morning through Thursday
     evening for OHZ010>012-089.
PA...Beach Hazards Statement from Thursday morning through Thursday
     evening for PAZ001.
MARINE...Small Craft Advisory from 6 AM to 2 PM EDT Thursday for
     LEZ142>144.
     Small Craft Advisory from 8 AM to 11 PM EDT Thursday for
     LEZ145>149.

&&

SYNOPSIS...Kahn
NEAR TERM...Kahn
SHORT TERM...Kahn
LONG TERM...Kahn
AVIATION...03
MARINE...03

Hazardous Weather Outlook
National Weather Service Cleveland OH
350 PM EDT Wed Jul 16 2025

LEZ061-142>149-162>169-172000-
Ripley to Buffalo NY extending from 5NM off shoreline to US-
Canadian border-Maumee Bay to Reno Beach OH-
Reno Beach to The Islands OH-The Islands to Vermilion OH-
Vermilion to Avon Point OH-Avon Point to Willowick OH-
Willowick to Geneva-on-the Lake OH-Geneva-on-the-Lake to Conneaut OH-
Conneaut OH to Ripley NY-
Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM
offshoreline to US-Canadian border-
Reno Beach to The Islands OH beyond 5NM off shoreline to US-
Canadian border-
The Islands to Vermilion OH beyond 5 nm off shoreline to US-
Canadian border-
Vermilion to Avon Point OH beyond 5 nm off shoreline to US-
Canadian border-
Avon Point to Willowick OH beyond 5 nm off shoreline to US-
Canadian border-Willowick to Geneva-on-the-
Lake OH beyond 5NM off shoreline to US-Canadian border-Geneva-on-the-
Lake to Conneaut OH beyond 5 nm off shoreline to US-Canadian border-
Conneaut OH to Ripley NY beyond 5 nm off shoreline to US-
Canadian border-
350 PM EDT Wed Jul 16 2025

This Hazardous Weather Outlook is for Lake Erie.

.DAY ONE...This afternoon and tonight.

Showers and thunderstorms are expected through this evening. Some
storms may produce gusty winds.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

OHZ003-006>009-013-014-017>023-027>033-036>038-047-PAZ002-003-172000-
Lucas-Wood-Ottawa-Sandusky-Erie-Geauga-Ashtabula Inland-Hancock-
Seneca-Huron-Medina-Summit-Portage-Trumbull-Wyandot-Crawford-
Richland-Ashland-Wayne-Stark-Mahoning-Marion-Morrow-Holmes-Knox-
Southern Erie-
350 PM EDT Wed Jul 16 2025

This Hazardous Weather Outlook is for north central Ohio, northeast
Ohio, northwest Ohio and northwest Pennsylvania.

.DAY ONE...This afternoon and tonight.

Showers and thunderstorms are expected through this evening. Heavy
rain may result in isolated flash flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

OHZ010>012-089-PAZ001-172000-
Lorain-Cuyahoga-Lake-Ashtabula Lakeshore-Northern Erie-
350 PM EDT Wed Jul 16 2025

...BEACH HAZARDS STATEMENT IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...

This Hazardous Weather Outlook is for north central Ohio, northeast
Ohio and northwest Pennsylvania.

.DAY ONE...This afternoon and tonight.

Showers and thunderstorms are expected through this evening. Heavy
rain may result in isolated flash flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Beach Hazards Statement.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Special Weather Statement
National Weather Service Cleveland OH
123 PM EDT Wed Jul 16 2025

OHZ018-019-161815-
Seneca OH-Huron OH-
123 PM EDT Wed Jul 16 2025

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN HURON AND EASTERN
SENECA COUNTIES THROUGH 215 PM EDT...

At 123 PM EDT, Doppler radar was tracking a strong thunderstorm near
Bloomville, or 11 miles east of Tiffin, moving east at 25 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Norwalk, Bellevue, Willard, Milan, Northern Milan, Bloomville,
Monroeville, Attica, North Fairfield, Republic, and Flat Rock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4129 8273 4129 8257 4121 8254 4109 8253
      4104 8305 4119 8305
TIME...MOT...LOC 1723Z 261DEG 21KT 4111 8296

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Kahn