Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 13, NWS Pittsburgh, PA

May 16, 1990Fayette County, Greene County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at May 16, 1990, 5:46 PM EDT for Fayette County, Greene County, Pennsylvania. It was in force for 74 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 16, 1990, 5:46 PM EDT (21:46 UTC)
Expired
May 16, 1990, 7:00 PM EDT
In force
74 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

Counties Fayette County, PA, Greene County, PA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
May 16, 6:00 PM EDTThunderstorm Wind 0Fayette, PA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.8 hours before the alert went out and 60 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 1990-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 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 1990-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 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
31 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
819 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
209 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPIT 162148
SVRPIT
PAC051-059-162300-

BULLETIN  BROADCAST IMMEDIATELY
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
546 PM EDT WED MAY 16 1990

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A SEVERE
THUNDERSTORM WARNING UNTIL 7 PM FOR THESE COUNTIES IN

WESTERN PENNSYLVANIA...GREENE AND FAYETTE.

AT 540 PM RADAR SHOWED A SEVERE THUNDERSTORM 5 MILES SOUTH OF
WAYNESBURG PA IN GREENE COUNTY. THIS STORM IS MOVING EAST AT 30 MPH
AND WILL PASS OVER POINT MARION PA IN FAYETTE COUNTY.

A SEVERE THUNDERSTORM WARNING MEANS SEVERE THUNDERSTORMS ARE
IMMINENT OR IN PROGRESS. THESE STORMS WILL HAVE DAMAGING WIND..HAIL
..HEAVY RAIN..AND DANGEROUS LIGHTNING.

IF THREATENING WEATHER APPROACHEvS..GO TO A SAFE PLACE IMMEDIATELY.

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.