Alert archive / Pennsylvania / Flash Flood Warnings in 1993

Flash Flood Warning 12, NWS Pittsburgh, PA

April 17, 1993Somerset County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Apr 17, 1993, 3:35 AM EDT for Somerset County, Pennsylvania. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Apr 17, 1993, 3:35 AM EDT (07:35 UTC)
Expired
Apr 17, 1993, 10:00 AM EDT
In force
6 hr
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Somerset County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 7.6 hours before the alert went out and 103 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 1993-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1993-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -28 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1175 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
-28 m²/s²
0-3 km storm-relative helicity
143 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
Apr 16, 9:40 PM EDTFlash Flood WarningPBZBedford, Blair, Cambria, Clearfield, Somerset6 hr
Apr 17, 3:35 AM EDTFlash Flood WarningPBZBedford, Blair, Cambria, Clearfield6 hr
Apr 17, 10:00 AM EDTFlash Flood WarningPBZBedford, Blair6 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1993Every flash flood warning in 1993

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.