Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 16, 2007, 3:30 PM EDT for Chester County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 16, 2007, 3:30 PM EDT (19:30 UTC)
- Expired
- May 16, 2007, 4:15 PM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Chester County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 83 km from the middle of the area, began a volume at 19:33 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.
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, 7.5 hours before the alert went out and 91 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 161930
SVRPHI
PAC029-091-101-162015-
/O.NEW.KPHI.SV.W.0007.070516T1930Z-070516T2015Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
330 PM EDT WED MAY 16 2007
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
SOUTHERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF PHILADELPHIA...
* UNTIL 415 PM EDT
* AT 329 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 NEAR PAOLI...OR ABOUT 12 MILES
NORTHWEST OF SPRINGFIELD...AND MOVING EAST AT 40 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
KING OF PRUSSIA BY 335 PM EDT...
PLYMOUTH MEETING AND NORRISTOWN BY 340 PM EDT...
AMBLER...CHESTNUT HILL...7 MILES NORTH OF GERMANTOWN AND 9 MILES
NORTH OF ROXBOROUGH BY 345 PM EDT...
WILLOW GROVE AND 6 MILES NORTH OF ROCKLEDGE BY 350 PM EDT...
LAT...LON 4014 7556 3992 7565 4007 7538 3994 7520
4005 7500 4024 7524
$$
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, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 44 min |
| May 16, 4:35 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 40 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.