Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 53, NWS Philadelphia/Mount Holly

June 1, 1998Philadelphia County, Pennsylvania; Camden County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 1998, 1:15 AM EDT for Philadelphia County, Pennsylvania; Camden County, New Jersey. It was in force for 35 min. 4 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 1, 1998, 1:15 AM EDT (05:15 UTC)
Expired
Jun 1, 1998, 1:50 AM EDT
In force
35 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties Camden County, NJ, Philadelphia County, PA

What was reported inside it

TimeReportWhereRemark
Jun 1, 1:17 AM EDTThunderstorm Wind 62Philadelphia, PA
Jun 1, 1:20 AM EDTTornado F2Bustleton, PAA tornado ripped through Upper and Lower Moreland Townships as well as extreme northeast Philadelphia during the early morning of June 1st. The tornado was rated as an F1 (A weak tornado on the Fujita Scale) in Montgomery County and intensified into an F2 (or
Jun 1, 1:25 AM EDTThunderstorm Wind 52Merchantville, NJ
Jun 1, 1:30 AM EDTHail 0.88Cherry Hill, NJ

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 31, 10:00 PM EDTTornado WatchSPC6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 5.3 hours before the alert went out and 213 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, Brookhaven, NY at 00:00Z on 1998-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 151 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, Brookhaven, NY at 00:00Z on 1998-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 233 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
151 J/kg
Mixed-layer CIN
-348 J/kg
Mixed-layer LCL
1224 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
233 m²/s²
0-3 km storm-relative helicity
319 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.

253 
WUUS1 KPHL 010516 RRA
SVRPHL
NJC007-015-033-PAC101-010550-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
115 AM EDT MON JUN 1 1998

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PHILADELPHIA COUNTY IN PENNSYLVANIA
  SALEM COUNTY IN NEW JERSEY
  GLOUCESTER COUNTY IN NEW JERSEY
  CAMDEN COUNTY IN NEW JERSEY

* UNTIL 150 AM EDT

* AT 110 AM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORM IN DELAWARE AND NEW CASTLE
  COUNTIES...MOVING EAST AT 45 MPH. THE STORMS HAVE A HISTORY OF
  PRODUCING DAMAGING WINDS.


A TORNADO WATCH REMAINS IN EFFECT FOR THE AREA. SEVERE
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH
LITTLE OR NO ADVANCE WARNING.

THIS IS A DANGEROUS STORM. MOVE INSIDE A STRONG BUILDING AND DO
NOT STAND NEAR WINDOWS. FOR YOUR PROTECTION MOVE TO AN INTERIOR
ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE
TELEVISION OUTLET.

KRAUS/DELISI

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 31, 8:11 PM EDTSevere Thunderstorm WarningPHIBerks64 min
May 31, 8:37 PM EDTTornado WarningPHIBerks33 min
May 31, 9:07 PM EDTTornado WarningPHIBerks, Lehigh48 min
May 31, 9:14 PM EDTSevere Thunderstorm WarningPHIBerks46 min
May 31, 9:39 PM EDTTornado WarningPHIBerks, Chester36 min
May 31, 9:43 PM EDTTornado WarningPHIBucks32 min
May 31, 10:01 PM EDTTornado WarningPHIMonroe34 min
May 31, 10:21 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery49 min
May 31, 11:01 PM EDTSevere Thunderstorm WarningPHINorthampton34 min
Jun 1, 12:17 AM EDTSevere Thunderstorm WarningPHIBerks48 min
Jun 1, 12:40 AM EDTSevere Thunderstorm WarningPHIChester50 min
Jun 1, 12:54 AM EDTSevere Thunderstorm WarningPHIBucks31 min
Jun 1, 1:00 AM EDTSevere Thunderstorm WarningPHIDelaware50 min
May 31, 8:42 PM EDTTornado WarningPHISussex33 min
May 31, 10:31 PM EDTSevere Thunderstorm WarningPHISussex19 min
May 31, 11:24 PM EDTSevere Thunderstorm WarningPHIMorris31 min
Jun 1, 1:10 AM EDTSevere Thunderstorm WarningPHIMercer, Middlesex50 min
Jun 1, 1:15 AM EDTSevere Thunderstorm WarningPHIGloucester, Salem35 min
Jun 1, 1:26 AM EDTSevere Thunderstorm WarningPHICumberland49 min
Jun 1, 1:30 AM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington65 min
Jun 1, 1:37 AM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean63 min
Jun 1, 1:37 AM EDTSevere Thunderstorm WarningPHIMiddlesex63 min
Jun 1, 1:42 AM EDTSevere Thunderstorm WarningPHICape May48 min
Jun 1, 1:44 AM EDTSevere Thunderstorm WarningPHIMercer36 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1998Severe Thunderstorm Warnings in New Jersey, 1998Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.