Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 14, NWS State College, PA

April 30, 1994Cumberland County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Apr 30, 1994, 10:09 PM EDT for Cumberland County, Pennsylvania. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Apr 30, 1994, 10:09 PM EDT (02:09 UTC)
Expired
Apr 30, 1994, 11:15 PM EDT
In force
66 min
Issued by
NWS State College, PA
Area
Whole counties

County Cumberland County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.2 hours before the alert went out and 135 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 1994-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1201 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, Washington/Dulle, VA at 00:00Z on 1994-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 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
1201 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
809 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
180 m²/s²
0-3 km storm-relative helicity
258 m²/s²
Significant tornado parameter
0.9
Supercell composite
4.3

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 State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 8:59 PM EDTSevere Thunderstorm WarningCTPFranklin61 min
Apr 30, 10:43 PM EDTSevere Thunderstorm WarningCTPDauphin, Lancaster, York62 min
Apr 30, 10:43 PM EDTSevere Thunderstorm WarningCTPAdams62 min
May 1, 5:37 AM EDTFlash Flood WarningCTPFranklin, Fulton3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1994Every severe thunderstorm warning in 1994

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.