Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 139, NWS Philadelphia/Mount Holly

August 26, 1998Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 26, 1998, 1:10 AM EDT for Northampton County, Pennsylvania. It was in force for 35 min. 2 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
Aug 26, 1998, 1:10 AM EDT (05:10 UTC)
Expired
Aug 26, 1998, 1:45 AM EDT
In force
35 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Northampton County, PA

What was reported inside it

TimeReportWhereRemark
Aug 26, 1:10 AM EDTThunderstorm Wind 57Indianland, PA
Aug 26, 1:30 AM EDTThunderstorm Wind 57Bethlehem, PA

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 nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 5.2 hours before the alert went out and 206 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 1998-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 358 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 1998-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 163 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
358 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1295 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
163 m²/s²
0-3 km storm-relative helicity
280 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.2

Open this sounding in Storm Lab

The text

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

012 
WUUS1 KPHL 260511 RRA
SVRPHL
PAC095-260545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
110 AM EDT WED AUG 26 1998

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHAMPTON COUNTY IN PENNSYLVANIA

* UNTIL 145 AM EDT

* AT 110 AM EDT... A SEVERE THUNDERSTORM WAS INDICATED 3 MILES WEST
  NORTHWEST OF CHAPMAN OR 3 MILES SOUTHWEST OF POINT PHILLIP... BY
  NATIONAL WEATHER SERVICE DOPPLER RADAR... MOVING EAST 35 MPH.

* THE SEVERE THUNDERSTORM IS EXPECTED TO BE NEAR...
  POINT PHILLIP AT 115 AM EDT
  NAZARETH AT 120 AM EDT
  STOCKERTOWN AT 125 AM EDT
  TATAMY AT 125 AM EDT
  MARTINS CREEK AT 130 AM EDT

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.

DI/WWR

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 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.