Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 9, NWS State College, PA

April 27, 1994Montour County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Apr 27, 1994, 2:02 PM EDT for Montour County, Pennsylvania. It was in force for 43 min.

The area

The counties it named.

The facts

Issued
Apr 27, 1994, 2:02 PM EDT (18:02 UTC)
Expired
Apr 27, 1994, 2:45 PM EDT
In force
43 min
Issued by
NWS State College, PA
Area
Whole counties

County Montour County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.0 hours before the alert went out and 240 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 12:00Z on 1994-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 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 12:00Z on 1994-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
48 J/kg
Mixed-layer CIN
-220 J/kg
Mixed-layer LCL
1791 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
12 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 KHAR 271802 RRA
SVRHAR
PAC093-271845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
202 PM EDT WED APR 27 1994
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN CENTRAL PENNSYLVANIA
 
   ...MONTOUR COUNTY
 
NATIONAL WEATHER SERVICE DOPPLER RADAR HAS INDICATED A SEVERE
THUNDERSTORM IN SOUTHERN MONTOUR COUNTY. THIS STORM WILL LIKELY PRODUCE
DAMAGING WINDS AND POSSIBLY HAIL AS IT MOVES EAST AT AROUND 30 MPH.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AVND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
RODGERS
 
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 1:09 PM EDTSevere Thunderstorm WarningCTPFranklin51 min
Apr 27, 1:56 PM EDTSevere Thunderstorm WarningCTPAdams49 min
Apr 27, 2:16 PM EDTSevere Thunderstorm WarningCTPYork59 min

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.