Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 96, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 27, 2007, 4:35 PM EDT for Chester County, Pennsylvania. It was in force for 46 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
- Jun 27, 2007, 4:35 PM EDT (20:35 UTC)
- Expired
- Jun 27, 2007, 5:21 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Chester County, PA
The radar
The Dover AFB radar (KDOX), 116 km from the middle of the area, began a volume at 20:35 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 nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.6 hours before the alert went out and 36 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
- 1994 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 955 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- -17 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 272035
SVRPHI
PAC029-272200-
/O.NEW.KPHI.SV.W.0096.070627T2035Z-070627T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
435 PM EDT WED JUN 27 2007
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 600 PM EDT
* AT 430 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 11
MILES SOUTHWEST OF OXFORD...OR ABOUT 22 MILES WEST OF NEWARK...AND
MOVING EAST AT 15 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
OXFORD BY 510 PM EDT...
WEST GROVE BY 540 PM EDT...
KENNETT SQUARE BY 600 PM EDT...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
LAT...LON 3974 7613 3973 7612 3973 7611 3975 7611
3974 7610 3975 7609 3981 7605 3993 7573
3993 7572 3983 7569 3979 7574 3973 7578
3972 7614
$$
TFG1 follow-up statement
000
WWUS51 KPHI 272121
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
520 PM EDT WED JUN 27 2007
PAC029-272130-
/O.CAN.KPHI.SV.W.0096.000000T0000Z-070627T2200Z/
CHESTER PA-
520 PM EDT WED JUN 27 2007
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CHESTER COUNTY IS
CANCELLED...
THE STORM HAS WEAKENED AS THE GUST FRONT HAS MOVED WELL AHEAD OF THE
THUNDERSTORM.
LAT...LON 3974 7613 3973 7612 3973 7611 3975 7611
3974 7610 3975 7609 3981 7605 3993 7573
3993 7572 3983 7569 3979 7574 3973 7578
3972 7614
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 1:19 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 56 min |
| Jun 27, 2:10 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 95 min |
| Jun 27, 3:42 PM EDT | Excessive Heat Warning | PHI | Delaware, Philadelphia | 27 hr |
| Jun 27, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 66 min |
| Jun 27, 7:58 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh | 62 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.