Alert archive / Pennsylvania / Flash Flood Warnings in 2026

Flash Flood Warning 43, NWS Pittsburgh, PA

July 10, 2026Armstrong County, Butler County, Clarion County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jul 10, 2026, 1:10 PM EDT for Armstrong County, Butler County, Clarion County, Pennsylvania. It was in force for 3 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
Jul 10, 2026, 1:10 PM EDT (17:10 UTC)
Expired
Jul 10, 2026, 4:15 PM EDT
In force
3 hr
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Flood severity
None

Counties Armstrong County, PA, Butler County, PA, Clarion County, PA

The radar

The Pittsburgh radar (KPBZ), 72 km from the middle of the area, began a volume at 17:12 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

Pittsburgh, PA (KPIT), launched 12:00Z, 5.2 hours before the alert went out and 75 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, Pittsburgh, PA at 12:00Z on 2026-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 14 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, Pittsburgh, PA at 12:00Z on 2026-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.19395878Sfc1 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
14 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
1334 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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 Jul 10, 7:11 AM EDT, 5 hours 59 minutes earlier.

Area forecast discussion, Jul 10, 7:11 AM EDT, 5 hours 59 minutes before
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Hazardous weather outlook, Jul 10, 11:43 AM EDT, 1 hour 27 minutes before
Hazardous Weather Outlook
National Weather Service Pittsburgh PA
1143 AM EDT Fri Jul 10 2026

OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>022-029-
031-073>078-WVZ001>004-012-021-509>514-111545-
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-
Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest-
Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong-
Washington-Greene-Westmoreland-Higher Elevations of Westmoreland-
Fayette-Higher Elevations of Fayette-Indiana-
Higher Elevations of Indiana-Hancock-Brooke-Ohio-Marshall-Wetzel-
Marion-Monongalia-
Ridges of Eastern Monongalia and Northwestern Preston-Preston-
Eastern Preston-Western Tucker-Eastern Tucker-
1143 AM EDT Fri Jul 10 2026

...FLOOD WATCH IN EFFECT UNTIL 10 PM EDT THIS EVENING...

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

.DAY ONE...This afternoon 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 for training thunderstorms this afternoon and evening.
Rainfall rates could range between 3-5 inches per hour in isolated
storms.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Above-average temperatures are expected to return Tuesday under high
pressure. Heat indices will likely range from low to mid-90s.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

SKH

In the hours before

Local storm report, Jul 10, 9:56 AM EDT, 3 hours 14 minutes before
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Local storm report, Jul 10, 10:27 AM EDT, 2 hours 43 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
1027 AM EDT Fri Jul 10 2026

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

1000 PM     Flash Flood      3 N Clymer              40.71N 79.01W
07/06/2026                   Indiana            PA   Fire Dept/Rescue

            Over 25 flooded basements, Fisher Furniture
            store flooded, St Marys Public Library
            damaged from flood waters, and intersection
            of Leroy Road and SR 403 flooded with all
            lanes closed.

&&

MLB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 1:56 AM EDTFlood WatchPBZAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 9 more20 hr
Jul 10, 1:13 PM EDTFlash Flood WarningPBZButler, Lawrence, Mercer, Venango3 hr
Jul 10, 2:50 PM EDTSevere Thunderstorm WarningPBZBeaver, Butler, Lawrence, Mercer40 min
Jul 10, 2:51 PM EDTFlash Flood WarningPBZFayette, Greene, Washington, Westmoreland87 min
Jul 10, 3:04 PM EDTFlash Flood WarningPBZClarion, Forest, Jefferson, Venango2 hr
Jul 10, 3:10 PM EDTFlash Flood WarningPBZArmstrong, Beaver, Butler, Indiana, Lawrence, Westmoreland3 hr
Jul 10, 3:17 PM EDTSevere Thunderstorm WarningPBZArmstrong, Beaver, Butler, Lawrence43 min
Jul 10, 3:19 PM EDTFlash Flood WarningPBZAllegheny3 hr
Jul 10, 3:55 PM EDTFlash Flood WarningPBZAllegheny, Beaver, Butler, Lawrence3 hr
Jul 10, 5:27 PM EDTFlash Flood WarningPBZAllegheny, Beaver, Washington3 hr
Jul 10, 6:11 PM EDTAreal Flood WarningPBZArmstrong, Butler, Indiana3 hr
Jul 10, 12:51 PM EDTFlash Flood WarningPBZBelmont, Guernsey3 hr
Jul 10, 5:02 PM EDTFlash Flood WarningPBZHarrison, Tuscarawas3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 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.