Alert archive / Pennsylvania / Flash Flood Warnings in 1990

Flash Flood Warning 55, NWS Pittsburgh, PA

July 12, 1990Bedford County, Cambria County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jul 12, 1990, 3:50 PM EDT for Bedford County, Cambria County, Pennsylvania. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jul 12, 1990, 3:50 PM EDT (19:50 UTC)
Expired
Jul 12, 1990, 6:00 PM EDT
In force
2 hr
Issued by
NWS Pittsburgh, PA
Area
Whole counties

Counties Bedford County, PA, Cambria 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, 7.8 hours before the alert went out and 128 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 1990-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 89 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 1990-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
89 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Jul 12, 9:20 AM EDTFlash Flood WarningPBZBeaver, Butler4 hr
Jul 12, 10:35 AM EDTFlash Flood WarningPBZArmstrong, Clarion, Jefferson3 hr
Jul 12, 12:08 PM EDTFlash Flood WarningPBZIndiana112 min
Jul 12, 12:40 PM EDTFlash Flood WarningPBZArmstrong, Beaver, Butler, Clarion3 hr
Jul 12, 12:40 PM EDTFlash Flood WarningPBZJefferson3 hr
Jul 12, 12:40 PM EDTFlash Flood WarningPBZAllegheny2 hr
Jul 12, 12:40 PM EDTFlash Flood WarningPBZClearfield2 hr

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.