Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 84, NWS Pittsburgh, PA

July 22, 1990Beaver County, Pennsylvania; Hancock County, West Virginia

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 22, 1990, 9:01 PM EDT for Beaver County, Pennsylvania; Hancock County, West Virginia. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Jul 22, 1990, 9:01 PM EDT (01:01 UTC)
Expired
Jul 22, 1990, 10:00 PM EDT
In force
59 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

Counties Beaver County, PA, Hancock County, WV

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 00:00Z, 1.0 hours before the alert went out and 37 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 1990-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 265 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 00:00Z on 1990-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
265 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
828 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.3

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 Pittsburgh, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 22, 8:02 PM EDTSevere Thunderstorm WarningPBZBeaver58 min
Jul 22, 8:07 PM EDTTornado WarningPBZButler53 min
Jul 22, 8:31 PM EDTSevere Thunderstorm WarningPBZWashington59 min
Jul 22, 8:52 PM EDTFlash Flood WarningPBZClarion3 hr
Jul 22, 11:35 PM EDTFlash Flood WarningPBZClarion4 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1990Severe Thunderstorm Warnings in West Virginia, 1990Every severe thunderstorm 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.