Alert archive / Ohio / Flood Watches in 2026

Flood Watch 21, NWS Pittsburgh, PA

September 20, 20266 counties in Pennsylvania; 11 counties in Ohio; 9 counties in West Virginia

NWS Pittsburgh, PA issued this flood watch at Sep 20, 2026, 12:00 PM EDT for 6 counties in Pennsylvania; 11 counties in Ohio; 9 counties in West Virginia. It was in force for 56 hr.

The area

The counties it named.

The facts

Issued
Sep 20, 2026, 12:00 PM EDT (16:00 UTC)
Expired
Sep 22, 2026, 7:52 PM EDT
In force
56 hr
Issued by
NWS Pittsburgh, PA
Flood severity
None
All 26 counties

Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Muskingum County, OH, Noble County, OH, Tuscarawas County, OH, Allegheny County, PA, Beaver County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Preston County, WV, Tucker County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 63 km from the middle of the area, began a volume at 16:00 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, 4.0 hours before the alert went out and 280 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 2026-09-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1506 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 2026-09-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 303 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
1506 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
973 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
303 m²/s²
0-3 km storm-relative helicity
351 m²/s²
Significant tornado parameter
1.2
Supercell composite
5.8

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 20, 2:48 AM EDTFlash Flood WarningPBZWashington2 hr
Sep 20, 10:37 AM EDTFlash Flood WarningPBZWashington3 hr
Sep 20, 1:17 PM EDTAreal Flood WarningPBZAllegheny, Washington5 hr
Sep 20, 3:22 PM EDTAreal Flood WarningPBZWashington5 hr
Sep 20, 9:02 AM EDTFlash Flood WarningPBZBelmont, Guernsey, Harrison, Jefferson, Tuscarawas3 hr
Sep 20, 11:49 AM EDTAreal Flood WarningPBZBelmont, Coshocton, Guernsey, Harrison, Jefferson, Tuscarawas7 hr

Nearby

Flood Watches in Ohio, 2026Flood Watches in West Virginia, 2026Flood Watches in Pennsylvania, 2026Every flood watch 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.