Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 21, NWS State College, PA

July 14, 1992Huntingdon County, Mifflin County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 14, 1992, 12:44 AM EDT for Huntingdon County, Mifflin County, Pennsylvania. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Jul 14, 1992, 12:44 AM EDT (04:44 UTC)
Expired
Jul 14, 1992, 1:30 AM EDT
In force
46 min
Issued by
NWS State College, PA
Area
Whole counties

Counties Huntingdon County, PA, Mifflin County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 4.7 hours before the alert went out and 177 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 1992-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 583 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 1992-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
583 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1185 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.2
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHAR 140446
SVRHAR
PAC087-061-140530-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
1244 AM EDT TUE JUL 14 1992
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  130 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...S...
 
IN CENTRAL PENNSYLVANIA
 
   ...MIFFLIN COUNTY
 
IN SOUTH CENTRAL PENNSYLVANIA
 
   ...NORTHERN HUNTINGDON COUNTY
 
AT 1245 AM HARRISBURG RADAR SHOWED A SEVERE THUNDERSTORM OVER NORTHERN
HUNTINGDON COUNTY. THIS THUNDERSTORM WILL CROSS NORTHERN HUNTINGDON
COUNTY BETWEEN 1245 AM AND 0100 AM EDT AND CROSS MIFFLIN COUNTY
BETWEEN 0100 AM AND 0130 AM EDT.  THESE STORMS HAVE A HISTORY OF
CAUSING DOWNED TREES AND POWER LINES.  EARLIER THIS EVENING...THESE
STORMS SPAWNED SEVERAL TORNADOES OVER WESTERN PENNSYLVANIA.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 13, 11:42 PM EDTSevere Thunderstorm WarningCTPCentre108 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1992Every severe thunderstorm warning in 1992

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.