Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 51, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 8, 2007, 10:40 PM EDT for Bucks County, Montgomery County, Pennsylvania. It was in force for 42 min. 2 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 8, 2007, 10:40 PM EDT (02:40 UTC)
- Expired
- Jun 8, 2007, 11:22 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 96 km from the middle of the area, began a volume at 02:41 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 8, 10:50 PM EDT | TSTM WND DMG | 3 Se Gilbertsville, PA | TREE DOWN IN NEW HANOVER. |
| Jun 8, 11:08 PM EDT | TSTM WND DMG | 2 E Doylestown, PA | TREE DOWN ON CAR IN BUCKINGHAM. |
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 8, 8:29 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 2.7 hours before the alert went out and 221 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 784 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 295 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 090241
SVRPHI
PAC017-091-090345-
/O.NEW.KPHI.SV.W.0051.070609T0240Z-070609T0345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1040 PM EDT FRI JUN 8 2007
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 1145 PM EDT
* AT 1037 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
GILBERTSVILLE...OR ABOUT 17 MILES SOUTH OF ALLENTOWN...AND MOVING
EAST AT 50 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
QUAKERTOWN BY 1050 PM EDT...
PERKASIE...SOUDERTON AND 8 MILES NORTH OF LANSDALE BY 1055 PM
EDT...
DUBLIN AND CHALFONT BY 1100 PM EDT...
DOYLESTOWN BY 1105 PM EDT...
9 MILES NORTH OF NEWTOWN AND 9 MILES NORTH OF RICHBORO BY 1115 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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
FRIDAY EVENING FOR NORTHEAST MARYLAND.
LAT...LON 4044 7553 4042 7549 4047 7543 4049 7511
4020 7488 4022 7555 4028 7567
$$
JJM1 follow-up statement
000
WWUS51 KPHI 090322
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1122 PM EDT FRI JUN 8 2007
PAC017-091-090332-
/O.CAN.KPHI.SV.W.0051.000000T0000Z-070609T0345Z/
MONTGOMERY PA-BUCKS PA-
1122 PM EDT FRI JUN 8 2007
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BUCKS AND NORTHERN
MONTGOMERY COUNTIES IS CANCELLED...
LAT...LON 4044 7553 4042 7549 4047 7543 4049 7511
4020 7488 4022 7555 4028 7567
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 8:53 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 46 min |
| Jun 8, 9:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 48 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.