Alert archive / Pennsylvania / Flash Flood Warnings in 1990

Flash Flood Warning 16, NWS Cleveland, OH

July 9, 1990Venango County, Pennsylvania

NWS Cleveland, OH issued this flash flood warning at Jul 9, 1990, 12:48 PM EDT for Venango County, Pennsylvania. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Jul 9, 1990, 12:48 PM EDT (16:48 UTC)
Expired
Jul 9, 1990, 1:45 PM EDT
In force
57 min
Issued by
NWS Cleveland, OH
Area
Whole counties

County Venango County, PA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 4.8 hours before the alert went out and 114 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 1990-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1312 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 1990-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 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
1312 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1037 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.6
Supercell composite
5.3

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 Cleveland, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 9, 12:48 PM EDTSevere Thunderstorm WarningCLEVenango57 min
Jul 9, 1:40 PM EDTSevere Thunderstorm WarningCLELawrence50 min
Jul 9, 1:50 PM EDTFlash Flood WarningCLEVenango70 min
Jul 9, 1:50 PM EDTSevere Thunderstorm WarningCLEVenango70 min

Nearby

Flash Flood Warnings in Pennsylvania, 1990Every flash flood warning in 1990

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.