Alert archive / Ohio / Flash Flood Warnings in 2026

Flash Flood Warning 102, NWS Pittsburgh, PA

August 11, 20264 counties in Ohio

NWS Pittsburgh, PA issued this flash flood warning at Aug 11, 2026, 8:45 AM EDT for 4 counties in Ohio. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 11, 2026, 8:45 AM EDT (12:45 UTC)
Expired
Aug 11, 2026, 2:45 PM EDT
In force
6 hr
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Flood severity
None

Counties Belmont County, OH, Guernsey County, OH, Monroe County, OH, Noble County, OH

The radar

The Pittsburgh radar (KPBZ), 113 km from the middle of the area, began a volume at 12:48 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 0.8 hours before the alert went out and 224 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2026-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3952 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2026-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
3952 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
708 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
2.4
Supercell composite
13.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pittsburgh, PA wrote its last area forecast discussion before this flash flood warning went out at Aug 11, 7:52 AM EDT, 53 minutes earlier.

Area forecast discussion, Aug 11, 7:52 AM EDT, 53 minutes before
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Hazardous weather outlook, Aug 11, 7:26 AM EDT, 1 hour 19 minutes before
Hazardous Weather Outlook
National Weather Service Pittsburgh PA
726 AM EDT Tue Aug 11 2026

PAZ007>009-013>016-022-077-078-121130-
Mercer-Venango-Forest-Lawrence-Butler-Clarion-Jefferson PA-Armstrong-
Indiana-Higher Elevations of Indiana-
726 AM EDT Tue Aug 11 2026

This Hazardous Weather Outlook is for western Pennsylvania.

.DAY ONE...Today and tonight.

There is a Marginal (level 1 of 5) Risk of severe thunderstorms this
afternoon and tonight. Damaging wind gusts are the primary threat.
Also, isolated instances of flash flooding will remain possible in
areas that already have saturated soil and that receive additional
heavy rain from thunderstorms.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

OHZ039>041-048>050-057>059-068-069-PAZ020-021-029-031-073>076-
WVZ001>004-012-021-509>514-121130-
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-
Muskingum-Guernsey-Belmont-Noble-Monroe-Beaver-Allegheny-Washington-
Greene-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Hancock-Brooke-Ohio-Marshall-Wetzel-
Marion-Monongalia-
Ridges of Eastern Monongalia and Northwestern Preston-Preston-
Eastern Preston-Western Tucker-Eastern Tucker-
726 AM EDT Tue Aug 11 2026

...FLOOD WATCH IN EFFECT THROUGH WEDNESDAY MORNING...

This Hazardous Weather Outlook is for east central Ohio, southwest
Pennsylvania, western Pennsylvania, and northern West Virginia.

.DAY ONE...Today and tonight.

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

   Flood Watch.

Also, severe thunderstorms are possible during the late afternoon
and evening hours. Damaging wind gusts are the primary concern, and
the potential for significant gusts (65-75 MPH) may increase in
portions of eastern Ohio if the track of an expected convective
complex trends more northward.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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

   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Milcarek

In the hours before

Local storm report, Aug 11, 3:47 AM EDT, 4 hours 58 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
347 AM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1039 AM     Tstm Wnd Dmg     3 SW Hanoverton         40.72N 80.98W
08/10/2026                   Carroll            OH   Public

            Report of State Route 9 closed at Marble
            Road due to downed tree over roadway. Time
            estimated based on radar.

&&

JF
Local storm report, Aug 11, 4:07 AM EDT, 4 hours 38 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
407 AM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0323 AM     Flash Flood      6 NNE Markleysburg      39.81N 79.40W
08/11/2026                   Fayette            PA   911 Call Center

            MAE WEST RD WILL BE SHUT DOWN NEAR SUGAR
            LOAF RD AT THE BASE BY ELECTION HOUSE HILL.
            ROAD IS WASHED OUT AND LARGE SECTION OF ROAD
            IS COLLAPSED. Time based on report.

&&

Lupo
Local storm report, Aug 11, 4:48 AM EDT, 3 hours 57 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
448 AM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0448 AM     Flash Flood      Hanoverton              40.76N 80.94W
08/11/2026                   Columbiana         OH   Dept of Highways

            Report of State Route 9 closed in both
            directions due to flooding.

&&

JF
Local storm report, Aug 11, 4:49 AM EDT, 3 hours 56 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
449 AM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0449 AM     Flash Flood      4 NE Hanoverton         40.79N 80.89W
08/11/2026                   Columbiana         OH   Dept of Highways

            Report of State Route 172 closed in both
            directions at Hanna Drive due to flooding.

&&

JF
Local storm report, Aug 11, 5:18 AM EDT, 3 hours 27 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
518 AM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0415 AM     Flash Flood      5 NNE Markleysburg      39.80N 79.40W
08/11/2026                   Fayette            PA   911 Call Center

            Report of State Route 281, Mae West Road,
            closed in the 1000 block due to road being
            washing away or collapsed with heavy rain.
            Time estimated based on radar.

&&

JF
Local storm report, Aug 11, 6:17 AM EDT, 2 hours 28 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
617 AM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0430 AM     Flash Flood      4 NE Markleysburg       39.78N 79.41W
08/11/2026                   Fayette            PA   Public

            Report of Tub Run Road flooded and
            impassable. Time estimated based on radar.

&&

JF

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 11, 1:47 AM EDTFlash Flood WarningPBZFayette3 hr
Aug 11, 2:56 AM EDTFlash Flood Warning Considerable damage threatPBZFayette106 min
Aug 11, 4:45 AM EDTAreal Flood WarningPBZFayette, Westmoreland4 hr
Aug 11, 9:37 AM EDTRiver Flood WarningPBZFayette3 hr
Aug 10, 11:34 PM EDTSevere Thunderstorm WarningPBZBelmont, Harrison, Jefferson24 min
Aug 10, 11:43 PM EDTFlash Flood WarningPBZMuskingum3 hr
Aug 10, 11:47 PM EDTFlash Flood WarningPBZBelmont, Harrison, Jefferson3 hr
Aug 11, 12:04 AM EDTFlash Flood WarningPBZCoshocton, Guernsey, Muskingum3 hr
Aug 11, 1:18 AM EDTFlash Flood WarningPBZBelmont3 hr
Aug 11, 2:20 AM EDTFlash Flood WarningPBZCarroll, Columbiana3 hr
Aug 11, 2:43 AM EDTAreal Flood WarningPBZMuskingum6 hr
Aug 11, 7:18 AM EDTFlash Flood WarningPBZCoshocton, Guernsey, Muskingum, Noble, Tuscarawas7 hr
Aug 11, 7:33 AM EDTFlash Flood WarningPBZCarroll, Columbiana, Tuscarawas4 hr
Aug 11, 7:35 AM EDTSevere Thunderstorm WarningPBZCoshocton, Guernsey, Muskingum, Tuscarawas40 min
Aug 11, 8:09 AM EDTSevere Thunderstorm WarningPBZBelmont, Carroll, Coshocton, Guernsey, Harrison, Muskingum and 2 more51 min
Aug 11, 8:47 AM EDTSevere Thunderstorm WarningPBZMonroe, Noble17 min
Aug 11, 10:38 AM EDTSevere Thunderstorm Warning Considerable damage threatPBZCoshocton, Muskingum, Noble52 min
Aug 11, 11:19 AM EDTSevere Thunderstorm WarningPBZBelmont, Guernsey, Monroe, Muskingum, Noble41 min
Aug 11, 11:53 AM EDTSevere Thunderstorm WarningPBZMonroe, Noble29 min
Aug 11, 2:03 PM EDTAreal Flood WarningPBZCoshocton, Guernsey, Muskingum, Noble13 hr

Nearby

Flash Flood Warnings in Ohio, 2026Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.