Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 210, NWS State College, PA

August 4, 1995Potter County, Tioga County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 4, 1995, 6:08 PM EDT for Potter County, Tioga County, Pennsylvania. It was in force for 52 min.

The area

The counties it named.

The facts

Issued
Aug 4, 1995, 6:08 PM EDT (22:08 UTC)
Expired
Aug 4, 1995, 7:00 PM EDT
In force
52 min
Issued by
NWS State College, PA
Area
Whole counties

Counties Potter County, PA, Tioga County, PA

The radar

The State College radar (KCCX), 100 km from the middle of the area, began a volume at 22:08 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.1 hours before the alert went out and 160 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, Buffalo Intl Airport, NY at 12:00Z on 1995-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 357 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, Buffalo Intl Airport, NY at 12:00Z on 1995-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 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
357 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
856 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCTP 042209
SVRCTP
PAC105-117-042300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
608 PM EDT FRI AUG 4 1995
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...S...
 
IN  PENNSYLVANIA
 
   ...SOUTHERN POTTER COUNTY...SOUTHERN TIOGA COUNTY
 
AT 610 PM STATE COLLEGE DOPPLER RADAR SHOWED A LINE OF SEVERE
THUNDERSTORMS FROM MANSFIELD IN EASTERN TIOGA COUNTY WESTWARD TO SWEDEN
VALLEY IN POTTER COUNTY. THESE STORMS ARE MOVING SOUTHEAST AT 20 MPH AND
WILL EXTEND FROM MORRIS RUN TO THE SUSQUEHANNOCK STATE FORREST BY 630
PM. THESE STORMS HAVE A HISTORY OF PRODUCING WIND DAMAGE IN THE AREA
FROM SUNDERLINVILLE TO SABINSVILLE.
 
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.
 
LA CORTE/NICOSIA
 
&

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 1:28 PM EDT, 4 hours 40 minutes earlier.

Area forecast discussion, Aug 4, 1:28 PM EDT, 4 hours 40 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
130 PM EDT FRI AUG 4 1

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 4:25 PM EDTSevere Thunderstorm WarningCTPWarren50 min
Aug 4, 5:11 PM EDTSevere Thunderstorm WarningCTPPotter, Tioga64 min
Aug 4, 6:47 PM EDTSevere Thunderstorm WarningCTPJuniata, Mifflin, Snyder58 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1995Every severe thunderstorm warning in 1995

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; radar from the NEXRAD Level II archive.