Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 62, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2001, 10:53 PM EDT for Bucks County, Pennsylvania. It was in force for 52 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 30, 2001, 10:53 PM EDT (02:53 UTC)
- Expired
- Jun 30, 2001, 11:45 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Bucks County, PA
The radar
The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 02:53 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 30, 10:55 PM EDT | Thunderstorm Wind 52 E | Quakertown, 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, 2.9 hours before the alert went out and 198 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
- 1564 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1439 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 010254 SVRPHI PAC017-010345- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1053 PM EDT SAT JUN 30 2001 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA. * UNTIL 1145 PM EDT. * AT 1048 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM... 3 MILES WEST OF QUAKERTOWN...MOVING EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PERKASIE AT 1100 PM. DUBLIN AT 1110 PM. DOYLESTOWN AT 1120 PM. LARGE HAIL AND DAMAGING WIND GUSTS ARE LIKELY WITH THIS STORM. FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE TELEVISION OUTLET. $$ LAT...LON 4047 7542 4040 7543 4025 7506 4053 7510
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 2:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 61 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 |
Nearby
Severe 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.