Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 69, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2001, 2:44 PM EDT for Bucks County, Northampton County, Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 61 min. 3 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 1, 2001, 2:44 PM EDT (18:44 UTC)
- Expired
- Jul 1, 2001, 3:45 PM EDT
- In force
- 61 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 95 km from the middle of the area, began a volume at 18:45 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 1, 2:45 PM EDT | Thunderstorm Wind 50 E | Northampton, PA | |
| Jul 1, 2:55 PM EDT | Thunderstorm Wind 52 E | Lower Harmony, NJ | |
| Jul 1, 3:05 PM EDT | Hail 1.75 | Holland, 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 1, 12:00 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 6.7 hours before the alert went out and 189 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
- 301 J/kg
- Mixed-layer CIN
- -117 J/kg
- Mixed-layer LCL
- 1284 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 011845 SVRPHI NJC019-041-PAC017-095-011945- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 244 PM EDT SUN JUL 1 2001 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA. SOUTHWESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY. HUNTERDON COUNTY IN NORTHWEST NEW JERSEY. NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA. * UNTIL 345 PM EDT. * AT 240 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM... 3 MILES WEST OF HELLERTOWN...MOVING EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OLD ORCHARD AT 250 PM. ALPHA AT 300 PM. MILFORD...FRENCHTOWN...BLOOMSBURY AT 310 PM. HIGH BRIDGE AT 325 PM. FLEMINGTON AT 330 PM. LEBANON AT 335 PM. DAMAGING WINDS IN EXCESS OF 55 MPH ARE EXPECTED FROM THIS STORM. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED. FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE TELEVISION OUTLET. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM SUNDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA. $$ LAT...LON 4066 7547 4049 7548 4044 7480 4069 7480
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 10:53 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 52 min |
| Jul 1, 1:09 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 36 min |
| Jul 1, 1:20 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 25 min |
| Jul 1, 1:26 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 64 min |
| Jul 1, 2:03 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 42 min |
| Jul 1, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 39 min |
| Jul 1, 4:35 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Montgomery | 40 min |
| Jul 1, 5:15 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 45 min |
| Jul 1, 5:15 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 45 min |
| Jul 1, 6:31 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 29 min |
| Jun 30, 10:31 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 44 min |
| Jun 30, 11:50 PM EDT | Severe Thunderstorm Warning | PHI | Somerset | 25 min |
| Jun 30, 11:56 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex | 34 min |
| Jul 1, 3:16 PM EDT | Severe Thunderstorm Warning | PHI | Somerset | 44 min |
| Jul 1, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 45 min |
| Jul 1, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 39 min |
| Jul 1, 4:23 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris | 52 min |
| Jul 1, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | Somerset | 46 min |
| Jul 1, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 49 min |
| Jul 1, 5:39 PM EDT | Tornado Warning | PHI | Monmouth | 36 min |
| Jul 1, 5:59 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 46 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2001Severe Thunderstorm Warnings in New Jersey, 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.