Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 31, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 4, 1996, 6:57 PM EDT for Chester County, Pennsylvania. It was in force for 48 min. 1 report 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 4, 1996, 6:57 PM EDT (22:57 UTC)
- Expired
- Jun 4, 1996, 7:45 PM EDT
- In force
- 48 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Chester County, PA
The radar
The Philadelphia radar (KDIX), 114 km from the middle of the area, began a volume at 23:00 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 4, 7:15 PM EDT | Hail 1 | Honey Brook, 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.0 hours before the alert went out and 182 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
- 117 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 875 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 042300 SVRPHL PAC029-042345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ 657 PM EDT TUE JUN 4 1996 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN PENNSYLVANIA ...NORTHWESTERN CHESTER COUNTY AT 655 PM NATIONAL WEATHER SERVICE DOPPLER RADAR IN MOUNT HOLLY NJ WAS INDICATING A SEVERE THUNDERSTORM IN EXTREME EASTERN LANCASTER COUNTY MOVING EAST NORTHEAST AT APPROXIMATELY 30 MPH. THIS STORM WILL ENTER NORTHWESTERN CHESTER COUNTY JUST SOUTH OF HONEYBROOK BY 705 PM. THIS IS A DANGEROUS STORM. PREPARE FOR STRONG DAMAGING WINDS... LARGE HAIL...HEAVY RAINS AND DEADLY LIGHTNING. SHOULD THE STORM APPROACH MOVE INSIDE QUICKLY. DO NOT STAND NEAR WINDOWS. MOBILE HOMES ARE MOST VULNERABLE TO HIGH WINDS AND SHOULD BE AVOIDED. JJM/TFG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 5:15 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 60 min |
| Jun 4, 6:02 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh | 43 min |
| Jun 4, 6:23 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 52 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1996Every severe thunderstorm warning in 1996
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; radar from the NEXRAD Level II archive.