Alert archive / Pennsylvania / Flash Flood Warnings in 2024

Flash Flood Warning 4, NWS Pittsburgh, PA

April 2, 202411 counties in Pennsylvania; Carroll County, Columbiana County, Ohio

NWS Pittsburgh, PA issued this flash flood warning at Apr 2, 2024, 9:51 PM EDT for 11 counties in Pennsylvania; Carroll County, Columbiana County, 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
Apr 2, 2024, 9:51 PM EDT (01:51 UTC)
Expired
Apr 3, 2024, 3:45 AM EDT
In force
6 hr
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Flood severity
None

Counties Carroll County, OH, Columbiana County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Fayette County, PA, Greene County, PA, Indiana County, PA, Lawrence County, PA, Washington County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 19 km from the middle of the area, began a volume at 01:54 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 00:00Z, 1.9 hours before the alert went out and 19 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 00:00Z on 2024-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 58 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 00:00Z on 2024-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.1939587897117Sfc1 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
58 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Apr 2, 8:58 PM EDT, 53 minutes earlier.

Area forecast discussion, Apr 2, 8:58 PM EDT, 53 minutes before
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Hazardous weather outlook, Apr 2, 9:34 PM EDT, 17 minutes before
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In the hours before

Local storm report, Apr 2, 6:45 PM EDT, 3 hours 6 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
645 PM EDT Tue Apr 02 2024

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

1000 AM     Flood            2 WNW Ross Township     40.54N  80.05W
04/02/2024                   Allegheny          PA   Dept of Highways

            Reis Run Rd closed due to flooding along Lowries Run
            and Harts Run

1000 AM     Flood            4 SSW St. Clairsville   40.02N  80.94W
04/02/2024                   Belmont            OH   Dept of Highways

            SR9 closed due to flooding along Neffs Run and McMahon
            Creek

1200 PM     Flood            4 WSW Zelienople        40.76N  80.22W
04/02/2024                   Beaver             PA   Dept of Highways

            Brush Creek Rd closed due to flooding along Brush
            Creek. Road remains closed at 6pm as water is high

1200 PM     Flash Flood      1 S Blawnox             40.47N  79.86W
04/02/2024                   Allegheny          PA   Dept of Highways

            Verona Rd closed due to flooding of Sandy Creek

0130 PM     Flash Flood      1 N Tarentum            40.62N  79.76W
04/02/2024                   Allegheny          PA   Dept of Highways

            Bull Creek Rd closed due to flooding along Bull Creek
            between Metz Rd and Ridge Rd

&&

Event Number PBZ2402093
Event Number PBZ2402094
Event Number PBZ2402095
Event Number PBZ2402096
Event Number PBZ2402097

Kramar
Local storm report, Apr 2, 7:17 PM EDT, 2 hours 34 minutes before
Preliminary Local Storm Report
National Weather Service Pittsburgh PA
717 PM EDT Tue Apr 02 2024

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

1200 PM     Flood            5 ENE New Martinsville  39.68N  80.78W
04/02/2024                   Wetzel             WV   Dept of Highways

            Proctor Creek Rd flooded along Proctor Creek. Water
            remained over the road at 630 pm

&&

Event Number PBZ2402098

Kramar
Local storm report, Apr 2, 9:30 PM EDT, 21 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 2, 8:19 PM EDTAreal Flood WarningPBZAllegheny, Beaver, Butler2 min
Apr 2, 8:39 PM EDTAreal Flood WarningPBZBeaver, Butler8 hr
Apr 3, 12:11 AM EDTRiver Flood WarningPBZAllegheny, Westmoreland34 hr
Apr 3, 3:43 AM EDTAreal Flood WarningPBZAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 5 more37 hr
Apr 3, 4:28 AM EDTAreal Flood WarningPBZClarion, Indiana, Jefferson27 hr
Apr 3, 6:17 AM EDTAreal Flood WarningPBZFayette, Greene26 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZFayette, Washington, Westmoreland30 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZAllegheny36 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZAllegheny, Washington, Westmoreland33 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZBeaver40 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZBeaver45 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZAllegheny34 hr
Apr 3, 6:32 PM EDTRiver Flood WarningPBZFayette, Greene9 hr
Apr 3, 7:19 PM EDTRiver Flood WarningPBZAllegheny23 hr
Apr 3, 7:24 PM EDTRiver Flood WarningPBZFayette, Greene7 hr
Apr 3, 1:29 AM EDTSpecial Weather StatementPBZTucker31 min
Apr 3, 1:36 AM EDTSevere Thunderstorm WarningPBZPreston, Tucker12 min
Apr 3, 1:42 AM EDTAreal Flood WarningPBZBrooke, Hancock, Marshall, Ohio, Wetzel30 hr
Apr 3, 9:22 AM EDTWinter Storm WatchPBZTucker4 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZMarshall58 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZMarshall60 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZOhio59 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZOhio53 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZHancock44 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZTyler, Wetzel59 hr
Apr 3, 12:10 PM EDTRiver Flood WarningPBZBrooke50 hr
Apr 3, 12:22 PM EDTRiver Flood WarningPBZBrooke51 hr
Apr 3, 1:00 PM EDTWinter Storm WarningPBZTucker59 hr
Apr 3, 1:00 PM EDTWinter Weather AdvisoryPBZPreston59 hr
Apr 2, 8:02 PM EDTSevere Thunderstorm WarningPBZCoshocton, Muskingum58 min
Apr 2, 8:06 PM EDTTornado WarningPBZMuskingum39 min
Apr 2, 8:16 PM EDTSevere Thunderstorm WarningPBZCarroll, Guernsey, Harrison, Jefferson, Tuscarawas44 min
Apr 2, 8:34 PM EDTSevere Thunderstorm Warning Considerable damage threatPBZCoshocton, Guernsey, Muskingum, Noble, Tuscarawas41 min
Apr 2, 8:39 PM EDTTornado WarningPBZCoshocton, Guernsey, Muskingum, Tuscarawas51 min
Apr 2, 9:08 PM EDTTornado WarningPBZMuskingum20 min
Apr 3, 12:10 PM EDTRiver Flood WarningPBZColumbiana46 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2024Flash Flood Warnings in Ohio, 2024Every flash flood warning in 2024

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.