Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 236, NWS State College, PA

October 5, 1995Snyder County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Oct 5, 1995, 9:48 PM EDT for Snyder County, Pennsylvania. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Oct 5, 1995, 9:48 PM EDT (01:48 UTC)
Expired
Oct 5, 1995, 10:15 PM EDT
In force
27 min
Issued by
NWS State College, PA
Area
Whole counties

County Snyder County, PA

The radar

The State College radar (KCCX), 80 km from the middle of the area, began a volume at 01:50 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.8 hours before the alert went out and 204 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 1995-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 937 joules per kilogram.LCLEL10008507005003002001001 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 1995-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 293 square meters per square second.19395878Sfc1 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
937 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
608 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
293 m²/s²
0-3 km storm-relative helicity
415 m²/s²
Significant tornado parameter
1.6
Supercell composite
8.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCTP 060149 RRA
SVRCTP
PAC109-060215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
948 PM EDT THU OCT 5 1995
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN  PENNSYLVANIA
 
   ...SNYDER COUNTY
 
AT 950 PM STATE COLLEGE DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM
MOVING NORTH INTO SOUTHWESTERN SNYDER COUNTY. THIS STORM WILL PUSH INTO
THE SELINSGROVE AREA SHORTLY AFTER 10 PM.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCEt WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
WINTHER/MICHAUD

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 Oct 5, 8:52 PM EDT, 56 minutes earlier.

Area forecast discussion, Oct 5, 8:52 PM EDT, 56 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
845 PM EDT THU OCT 5 1995

VAD WINDS ON KCCX 88D STILL SHOWING 5K FEET WINDS SCREAMING ALONG
AT 50 KTS.  STILL SOME LOW LEVEL VEERING...BUT NOT NEARLY AS
IMPRESSIVE AS EARLIER TONIGHT...IMPLYING HELICITY VALUES
DROPPING.  JUST GOT A CALL FROM A SPOTTER IN GREENCASTLE
(FRANKLIN CO) OF WINDS GUSTING TO NEAR 50.

THE BIG QUESTION WITH THE WIND ADVISORIES IS WHETHER OR NOT ANY
OF THE 50K WINDS WILL MIX DOWN TO THE SURFACE...AND THEREFORE
REQUIRE THE ADVISORIES TO BE EXTENDED.  OTHER THAN THE ISOLATED
REPORT MENTIONED ABOVE...HAVE NOT HEARD ANYTHING ABOUT STRONG
WINDS.  ALL WIND ADVISORIES NOW SLATED TO EXPIRE AT 1000 PM.
GIVEN ISOLATED NATURE OF HIGH WINDS... WOULD ELECT TO DROP
ADVISORIES...BUT STILL KEEP THE MENTION OF STRONG GUSTS ALONG THE
HIGHER ELEVATIONS.  ANOTHER SPOTTER CALL JUST IN AT 830 PM UNDER
ONE OF THE HEAVIEST CELLS JUST SOUTHEAST OF CTP REPORTS
TORRENTIAL RAINS...BUT NOTHING MUCH IN THE WAY OF GUSTY WINDS.

THIS LAST BATCH OF RAIN OVER CENTRAL PA REALLY SEEMS TO BE THE
END OF ANY ORGANIZED RAIN...WITH CELLS MOVING TO THE NE AT 40-50
KTS.

HAVE TO RUN...WITH POTENTIAL NASTY CELLS STARTING TO POP
OVERHEAD.  GOT AN ISOLATED LIGHTNING FLASH OUT THE WINDOW.

JUNG

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 5, 9:30 PM EDTSevere Thunderstorm WarningCTPPerry30 min
Oct 5, 10:20 PM EDTSevere Thunderstorm WarningCTPLancaster, York40 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.