Alert archive / Pennsylvania / Flash Flood Warnings in 1997

Flash Flood Warning 89, NWS Pittsburgh, PA

November 8, 1997Indiana County, Westmoreland County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Nov 8, 1997, 7:58 AM EST for Indiana County, Westmoreland County, Pennsylvania. It was in force for 6 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
Nov 8, 1997, 7:58 AM EST (12:58 UTC)
Expired
Nov 8, 1997, 2:00 PM EST
In force
6 hr
Issued by
NWS Pittsburgh, PA
Area
Whole counties

Counties Indiana County, PA, Westmoreland County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 1.0 hours before the alert went out and 70 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 1997-11-08Temperature 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 12:00Z on 1997-11-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.19395878Sfc1 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
503 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
131 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
Nov 7, 9:45 PM ESTFlash Flood WarningPBZIndiana, Westmoreland6 hr
Nov 8, 1:29 AM ESTFlash Flood WarningPBZArmstrong5 hr
Nov 8, 3:58 AM ESTFlash Flood WarningPBZIndiana, Westmoreland4 hr
Nov 8, 6:28 AM ESTFlash Flood WarningPBZJefferson5 hr
Nov 8, 8:25 AM ESTFlash Flood WarningPBZIndiana, Westmoreland6 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1997Every flash flood warning in 1997

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.