Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 6, NWS State College, PA

June 20, 1989Franklin County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 20, 1989, 8:09 PM EDT for Franklin County, Pennsylvania. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Jun 20, 1989, 8:09 PM EDT (00:09 UTC)
Expired
Jun 20, 1989, 9:15 PM EDT
In force
66 min
Issued by
NWS State College, PA
Area
Whole counties

County Franklin 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.2 hours before the alert went out and 112 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, Washington/Dulle, VA at 00:00Z on 1989-06-21Temperature 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, Washington/Dulle, VA at 00:00Z on 1989-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 9:00 PM EDTFlash Flood WarningCTPPerry4 hr
Jun 20, 9:27 PM EDTFlash Flood WarningCTPFulton4 hr
Jun 21, 7:20 AM EDTFlash Flood WarningCTPLycoming5 hr
Jun 21, 2:09 PM EDTFlash Flood WarningCTPHuntingdon4 hr
Jun 21, 3:42 PM EDTFlash Flood WarningCTPSnyder3 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.