Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 65, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 12, 2007, 2:48 PM EDT for Philadelphia County, Pennsylvania. It was in force for 42 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 12, 2007, 2:48 PM EDT (18:48 UTC)
- Expired
- Jun 12, 2007, 3:30 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 56 km from the middle of the area, began a volume at 18:50 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 12, 2:50 PM EDT | HAIL 0.25 | Philadelphia, PA | PEA SIZE HAIL AND HEAVY RAIN REPORTED IN TEH SUMMERTON SECTION OF PHILADELPHIA. |
| Jun 12, 3:00 PM EDT | HAIL 0.5 | Philadelphia, PA | DIME SIZE HAIL REPORTED IN PHILADELPHIA. |
| Jun 12, 3:11 PM EDT | TSTM WND DMG | Nw Philadelphia, PA | NUMEROUS TREES REPORTED DOWN IN THE NORTHWESTERN PART OF THE COUNTY. |
| Jun 12, 3:23 PM EDT | TSTM WND DMG | Nw Philadelphia, PA | NUMEROUS TREES REPORTED DOWN IN THE NORTHWESTERN PART OF PHILADELPHIA COUNTY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 12, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.8 hours before the alert went out and 109 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
- 186 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 1120 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 121850 SVRPHI PAC101-121930- /O.NEW.KPHI.SV.W.0065.070612T1848Z-070612T1930Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 248 PM EDT TUE JUN 12 2007 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA... THIS INCLUDES THE CITY OF PHILADELPHIA... * UNTIL 330 PM EDT * AT 245 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS NEAR 60 MPH. THIS STORM WAS LOCATED NEAR NEAR FEASTERVILLE...OR ABOUT 11 MILES SOUTHWEST OF TRENTON...AND MOVING SOUTHWEST AT 15 MPH. * THE PUBLIC REPORTED TREES DOWN AND NICKEL SIZE HAIL NEAR OXFORD VALLEY MALL AROUND 235 PM. * THE SEVERE THUNDERSTORM WILL BE NEAR... NORTHEAST PHILADELPHIA BY 300 PM EDT... PHILADELPHIA BY 315 PM EDT... CENTER CITY BY 320 PM EDT... 6 MILES SOUTHEAST OF ROXBOROUGH BY 325 PM EDT... LAT...LON 4007 7491 4013 7502 3997 7527 3992 7517 $$ JRP
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 12:56 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 64 min |
| Jun 12, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh | 26 min |
| Jun 12, 1:18 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 42 min |
| Jun 12, 2:00 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Northampton | 30 min |
| Jun 12, 2:15 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 30 min |
| Jun 12, 2:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 35 min |
| Jun 12, 3:20 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 40 min |
| Jun 12, 4:00 PM EDT | Flash Flood Warning | PHI | Montgomery | 3 hr |
| Jun 12, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 37 min |
| Jun 12, 5:46 PM EDT | Flash Flood Warning | PHI | Bucks | 119 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2007Every severe thunderstorm warning in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.