Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 96, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 26, 1998, 2:05 PM EDT for Chester County, Montgomery County, Pennsylvania. It was in force for 65 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
- Jun 26, 1998, 2:05 PM EDT (18:05 UTC)
- Expired
- Jun 26, 1998, 3:10 PM EDT
- In force
- 65 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Chester County, PA, Montgomery County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 26, 2:05 PM EDT | Thunderstorm Wind 50 | Pottstown, PA | |
| Jun 26, 2:30 PM EDT | Thunderstorm Wind 57 | Coatesville, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 26, 11:45 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.1 hours before the alert went out and 83 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.
- Mixed-layer CAPE
- 507 J/kg
- Mixed-layer CIN
- -148 J/kg
- Mixed-layer LCL
- 1558 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 261805 RRA SVRPHL PAC029-091-261910- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 205 PM EDT FRI JUN 26 1998 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CHESTER COUNTY IN PENNSYLVANIA MONTGOMERY COUNTY IN PENNSYLVANIA * UNTIL 310 PM EDT * AT 202 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED IN THE VICINITY OF VALLEY FORGE... BY NATIONAL WEATHER SERVICE DOPPLER RADAR AND SPOTTER REPORTS... MOVING EAST 30 MPH. A SPOTTER AT UPPER PROVIDENCE TWP MONTGOMERY COUNTY REPORTED 1 INCH SIZE HAIL. * THE SEVERE THUNDERSTORM IS EXPECTED TO BE NEAR... AMBLER AT 210 PM EDT BALA CYNWYD AT 210 PM EDT FORT WASHINGTON AT 210 PM EDT FLOURTOWN AT 210 PM EDT HATBORO AT 220 PM EDT JENKINTOWN AT 220 PM EDT WILLOW GROVE AT 220 PM 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. DO NOT DRIVE YOUR CAR WHERE WATER COVERS THE ROADWAY. THE WATER MAY BE DEEPER THAN YOU THINK. IF CAUGHT IN RISING FLOOD WATERS... ABANDON YOUR CAR QUICKLY AND MOVE TO HIGHER GROUND. FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER RADIO...YOUR LOCAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE TELEVISION OUTLET. RNS/WN &
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 11:58 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 47 min |
| Jun 26, 12:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 33 min |
| Jun 26, 12:32 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 63 min |
| Jun 26, 1:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 64 min |
| Jun 26, 2:30 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 65 min |
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.