Alert archive / Pennsylvania / Areal Flood Warnings in 2019

Areal Flood Warning 21, NWS Pittsburgh, PA

June 20, 2019Butler County, Pennsylvania

NWS Pittsburgh, PA issued this areal flood warning at Jun 20, 2019, 11:36 AM EDT for Butler County, Pennsylvania. It was in force for 12 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
Jun 20, 2019, 11:36 AM EDT (15:36 UTC)
Expired
Jun 20, 2019, 11:30 PM EDT
In force
12 hr
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Flood severity
None

County Butler County, PA

The radar

The Pittsburgh radar (KPBZ), 49 km from the middle of the area, began a volume at 15:36 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, 3.6 hours before the alert went out and 58 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 2019-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 45 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 2019-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
45 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
899 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal 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 areal flood warning went out at Jun 19, 7:34 PM EDT, 16 hours 2 minutes earlier.

Area forecast discussion, Jun 19, 7:34 PM EDT, 16 hours 2 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 8:04 PM EDTFlash Flood WarningPBZAllegheny, Washington, Westmoreland116 min
Jun 19, 11:17 PM EDTFlash Flood WarningPBZBeaver3 hr
Jun 20, 7:54 PM EDTAreal Flood AdvisoryPBZClarion, Forest, Mercer, Venango3 hr
Jun 19, 8:01 PM EDTFlash Flood WarningPBZBelmont119 min
Jun 19, 8:13 PM EDTFlash Flood WarningPBZMonroe, Noble6 hr
Jun 19, 8:29 PM EDTAreal Flood AdvisoryPBZMuskingum3 hr
Jun 19, 8:43 PM EDTFlash Flood WarningPBZBelmont2 hr
Jun 19, 8:54 PM EDTAreal Flood AdvisoryPBZCarroll2 hr
Jun 19, 9:00 PM EDTAreal Flood AdvisoryPBZMonroe2 hr
Jun 19, 9:21 PM EDTFlash Flood WarningPBZMonroe4 hr
Jun 19, 9:26 PM EDTFlash Flood WarningPBZCarroll5 hr
Jun 19, 10:09 PM EDTFlash Flood WarningPBZBelmont, Harrison, Jefferson2 hr
Jun 19, 10:19 PM EDTFlash Flood WarningPBZCarroll, Columbiana, Harrison, Jefferson3 hr
Jun 19, 10:33 PM EDTAreal Flood WarningPBZBelmont, Jefferson6 hr
Jun 19, 10:40 PM EDTFlash Flood WarningPBZCarroll, Harrison3 hr
Jun 19, 11:18 PM EDTFlash Flood WarningPBZCoshocton, Muskingum4 hr
Jun 19, 9:02 PM EDTAreal Flood AdvisoryPBZBrooke, Ohio118 min

Nearby

Areal Flood Warnings in Pennsylvania, 2019Every areal flood warning in 2019

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.