Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 16, 2007, 4:35 PM EDT for Delaware County, Pennsylvania. It was in force for 40 min. 1 report 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
- May 16, 2007, 4:35 PM EDT (20:35 UTC)
- Expired
- May 16, 2007, 5:15 PM EDT
- In force
- 40 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Delaware County, PA
The radar
The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 20:36 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 |
|---|---|---|---|
| May 16, 5:00 PM EDT | TSTM WND DMG | Prospect Park, PA | TREES DOWN. |
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 |
|---|---|---|---|
| May 16, 1:26 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.6 hours before the alert went out and 76 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
- 18 J/kg
- Mixed-layer CIN
- -160 J/kg
- Mixed-layer LCL
- 1421 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 138 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 162035
SVRPHI
PAC045-162115-
/O.NEW.KPHI.SV.W.0010.070516T2035Z-070516T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
435 PM EDT WED MAY 16 2007
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF SPRINGFIELD...
* UNTIL 515 PM EDT
* AT 432 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED 16 MILES WEST OF LIMA...OR ABOUT
14 MILES NORTH OF NEWARK...AND MOVING EAST AT 55 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
LIMA...NETHER PROVIDENCE TOWNSHIP AND 7 MILES NORTH OF CHESTER BY
450 PM EDT...
BROOMALL...SPRINGFIELD...SWARTHMORE AND RADNOR TOWNSHIP BY 455 PM
EDT...
LAT...LON 3997 7547 3985 7560 3981 7541 3987 7529
4005 7538
$$
MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 2:48 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Montgomery | 42 min |
| May 16, 3:26 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 49 min |
| May 16, 3:30 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery, Philadelphia | 45 min |
| May 16, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 44 min |
| May 16, 4:53 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 52 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.