Alert archive / Pennsylvania / Flash Flood Warnings in 1991

Flash Flood Warning 22, NWS Pittsburgh, PA

December 3, 1991Fayette County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Dec 3, 1991, 1:26 AM EST for Fayette County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Dec 3, 1991, 1:26 AM EST (06:26 UTC)
Expired
Dec 3, 1991, 4:30 AM EST
In force
3 hr
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Fayette County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 6.4 hours before the alert went out and 67 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 1991-12-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 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 1991-12-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 414 square meters per square second.1939587897Sfc1 km3 km6 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
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
500 m above ground
0-6 km bulk shear
93 kt
0-1 km storm-relative helicity
414 m²/s²
0-3 km storm-relative helicity
784 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
Dec 3, 12:28 AM ESTFlash Flood WarningPBZGreene, Washington4 hr
Dec 3, 1:26 AM ESTFlash Flood WarningPBZCambria, Westmoreland3 hr
Dec 3, 7:46 AM ESTFlash Flood WarningPBZGreene, Washington2 hr
Dec 2, 11:44 PM ESTFlash Flood WarningPBZMarshall4 hr
Dec 3, 4:55 AM ESTFlash Flood WarningPBZMarshall, Ohio9 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1991Every flash flood warning in 1991

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.