Alert archive / Pennsylvania / Tornado Warnings in 1990

Tornado Warning 1, NWS State College, PA

May 13, 1990York County, Pennsylvania

NWS State College, PA issued this tornado warning at May 13, 1990, 7:19 PM EDT for York County, Pennsylvania. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
May 13, 1990, 7:19 PM EDT (23:19 UTC)
Expired
May 13, 1990, 8:00 PM EDT
In force
41 min
Issued by
NWS State College, PA
Area
Whole counties

County York County, PA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.3 hours before the alert went out and 122 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 1990-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 1990-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 235 square meters per square second.1939587897Sfc1 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
6 J/kg
Mixed-layer CIN
-272 J/kg
Mixed-layer LCL
668 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
235 m²/s²
0-3 km storm-relative helicity
315 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 132321
TORHAR
PAC133-140000-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
719 PM EDT SUN MAY 13 1990
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  800 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL PENNSYLVANIA
          ...YORK
 
WE RECEIVED A REPORT OF A TORNADO TOUCHDOWN AT THE ECONCO LODGE...NEAR
EXIT 14 ON INTERSTATE HIGHWAY 83 ABOUT 10 MILE SOUTH OF HARRISBURG.
THIS WOUILD BE IN NORTHERN YORK COUNTY.
 
RADAR SHOWS THUNDERSTORMS WITH HEAVY RAIN AND A LOT OF LIGHTNING
MOVING THROUGH DAUPHIN AND YORK COUNTIES AT 715 PM.

The office that day

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

IssuedProductOfficeCountiesLasted
May 13, 7:36 PM EDTSevere Thunderstorm WarningCTPDauphin, Lancaster, Lebanon54 min

Nearby

Tornado Warnings in Pennsylvania, 1990Every tornado warning in 1990Tornadoes in 1990

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.