Alert archive / Pennsylvania / Flash Flood Warnings in 1992

Flash Flood Warning 43, NWS Pittsburgh, PA

August 11, 19924 counties in Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Aug 11, 1992, 12:58 AM EDT for 4 counties in Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 11, 1992, 12:58 AM EDT (04:58 UTC)
Expired
Aug 11, 1992, 4:00 AM EDT
In force
3 hr
Issued by
NWS Pittsburgh, PA
Area
Whole counties

Counties Armstrong County, PA, Clarion County, PA, Clearfield County, PA, Jefferson County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 5.0 hours before the alert went out and 110 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 1992-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3542 joules per kilogram.LCLEL10008507005003002001001 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 1992-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.1939Sfc1 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
3542 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
865 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 11:35 AM EDTFlash Flood WarningPBZAllegheny115 min
Aug 11, 11:47 AM EDTFlash Flood WarningPBZFayette, Somerset118 min
Aug 11, 11:47 AM EDTSevere Thunderstorm WarningPBZFayette, Somerset118 min
Aug 11, 12:16 PM EDTFlash Flood WarningPBZGreene3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1992Every flash flood warning in 1992

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.