Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 13, NWS Pittsburgh, PA

June 27, 1989Butler County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 27, 1989, 2:02 PM EDT for Butler County, Pennsylvania. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Jun 27, 1989, 2:02 PM EDT (18:02 UTC)
Expired
Jun 27, 1989, 3:00 PM EDT
In force
58 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Butler 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, 6.0 hours before the alert went out and 58 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 1989-06-27Temperature 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 1989-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939Sfc1 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
NaN m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
65 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
Jun 27, 2:46 PM EDTSevere Thunderstorm WarningPBZClarion, Jefferson59 min
Jun 27, 3:21 PM EDTFlash Flood WarningPBZAllegheny, Armstrong, Butler4 hr
Jun 27, 3:21 PM EDTFlash Flood WarningPBZClarion4 hr
Jun 27, 4:07 PM EDTSevere Thunderstorm WarningPBZClearfield, Indiana, Jefferson68 min
Jun 27, 6:03 PM EDTSevere Thunderstorm WarningPBZWashington57 min
Jun 27, 6:18 PM EDTSevere Thunderstorm WarningPBZAllegheny, Butler57 min
Jun 27, 7:09 PM EDTFlash Flood WarningPBZAllegheny4 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1989Every severe thunderstorm warning in 1989

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.