Alert archive / New Jersey / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 108, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 17, 2001, 8:19 PM EDT for Warren County, New Jersey; Northampton County, Pennsylvania. It was in force for 41 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
- Jul 17, 2001, 8:19 PM EDT (00:19 UTC)
- Expired
- Jul 17, 2001, 9:00 PM EDT
- In force
- 41 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Warren County, NJ, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 114 km from the middle of the area, began a volume at 00:20 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 |
|---|---|---|---|
| Jul 17, 8:20 PM EDT | Thunderstorm Wind 52 E | Wind Gap, PA | |
| Jul 17, 8:45 PM EDT | Thunderstorm Wind 50 E | New Vlg, 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 nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.3 hours before the alert went out and 193 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
- 849 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 180020 SVRPHI NJC041-PAC095-180100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 819 PM EDT TUE JUL 17 2001 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA. SOUTHWESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY. * UNTIL 900 PM EDT. * AT 815 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...4 MILES EAST OF WIND GAP...MOVING SOUTHEAST AT 20 MPH. LARGE HAIL AND DAMAGING WIND ARE POSSIBLE FROM THIS STORM. * THE SEVERE THUNDERSTORM WILL BE NEAR... BELVIDERE AT 830 PM. OXFORD AT 840 PM. ALPHA AT 845 PM. WASHINGTON AT 850 PM. FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE TELEVISION OUTLET. $$ LAT...LON 4092 7519 4082 7539 4063 7516 4078 7494
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 8:54 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon | 66 min |
| Jul 17, 9:51 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 39 min |
| Jul 17, 10:08 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 82 min |
| Jul 17, 8:34 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 56 min |
| Jul 17, 9:41 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 34 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2001Severe Thunderstorm Warnings in Pennsylvania, 2001Every severe thunderstorm warning in 2001
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.