Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 103, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 23, 2008, 11:20 PM EDT for 4 counties in Pennsylvania. It was in force for 55 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
- Jun 23, 2008, 11:20 PM EDT (03:20 UTC)
- Expired
- Jun 24, 2008, 12:15 AM EDT
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 100 km from the middle of the area, began a volume at 03:23 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 23, 11:25 PM EDT | TSTM WND DMG | Pottstown, PA | TREES DOWN AROUND THE POTTSTOWN AREA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 3.3 hours before the alert went out and 218 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
- 612 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 783 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 240320
SVRPHI
PAC017-029-077-091-240415-
/O.NEW.KPHI.SV.W.0103.080624T0320Z-080624T0415Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1120 PM EDT MON JUN 23 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
EXTREME NORTHEASTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 1215 AM EDT
* AT 1115 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 8 MILES WEST OF POTTSTOWN...OR
ABOUT 8 MILES SOUTHEAST OF READING...AND MOVING NORTHEAST AT 25
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
EAST GREENVILLE BY 1140 PM...
GERYVILLE AND ZIONSVILLE BY 1145 PM...
QUAKERTOWN BY 1155 PM...
PLEASANT VALLEY BY 1205 AM...
FERNDALE AND REVERE BY 1210 AM...
LAT...LON 4058 7574 4064 7548 4051 7533 4056 7522
4053 7513 4042 7508 4035 7501 4009 7541
4026 7567 4043 7550
TIME...MOT...LOC 0320Z 237DEG 33KT 4031 7573
$$
NIERENBERG2 follow-up statements
000
WWUS51 KPHI 240339
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1138 PM EDT MON JUN 23 2008
PAC017-029-077-091-240415-
/O.CON.KPHI.SV.W.0103.000000T0000Z-080624T0415Z/
CHESTER PA-MONTGOMERY PA-LEHIGH PA-BUCKS PA-
1138 PM EDT MON JUN 23 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR NORTHWESTERN BUCKS...SOUTHERN LEHIGH...MONTGOMERY AND EXTREME
NORTHEASTERN CHESTER COUNTIES...
AT 1136 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR GREEN LANE...OR 19
MILES SOUTH OF ALLENTOWN...MOVING NORTHEAST AT 38 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
PENNSBURG...GERYVILLE AND EAST GREENVILLE BY 1145 PM EDT...
TRUMBAUERSVILLE AND TELFORD BY 1150 PM EDT...
QUAKERTOWN...PERKASIE AND SELLERSVILLE BY 1155 PM EDT...
RICHLANDTOWN BY MIDNIGHT EDT...
BEDMINSTER BY 1205 AM EDT...
LAT...LON 4058 7574 4064 7548 4051 7533 4056 7522
4053 7513 4042 7508 4035 7501 4009 7541
4026 7567 4043 7550
TIME...MOT...LOC 0338Z 237DEG 33KT 4033 7551
$$
NIERENBERG000
WWUS51 KPHI 240356
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1154 PM EDT MON JUN 23 2008
PAC029-077-240404-
/O.CAN.KPHI.SV.W.0103.000000T0000Z-080624T0415Z/
CHESTER PA-LEHIGH PA-
1154 PM EDT MON JUN 23 2008
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LEHIGH AND EXTREME
NORTHEASTERN CHESTER COUNTIES IS CANCELLED...
LAT...LON 4036 7551 4040 7545 4051 7533 4056 7522
4053 7513 4042 7508 4035 7501 4009 7541
4031 7554
TIME...MOT...LOC 0354Z 237DEG 33KT 4043 7526
$$
PAC017-091-240415-
/O.CON.KPHI.SV.W.0103.000000T0000Z-080624T0415Z/
MONTGOMERY PA-BUCKS PA-
1154 PM EDT MON JUN 23 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR NORTHWESTERN BUCKS AND CENTRAL MONTGOMERY COUNTIES...
AT 1149 PM EDT...A THUNDERSTORM CAPABLE OF PRODUCING WIND GUSTS UP
TO 60 MPH WAS LOCATED NEAR PERKASIE...OR 16 MILES SOUTH OF
BETHLEHEM...AND IT WAS MOVING NORTHEAST AT AROUND 35 MPH.
THE THUNDERSTORM WILL BE NEAR...
BEDMINSTER AND 7 MILES NORTHWEST OF GARDENVILLE BY MIDNIGHT EDT...
OTTSVILLE...REVERE...TINICUM AND PIPERSVILLE BY 1205 AM EDT...
LAT...LON 4036 7551 4040 7545 4051 7533 4056 7522
4053 7513 4042 7508 4035 7501 4009 7541
4031 7554
TIME...MOT...LOC 0354Z 237DEG 33KT 4043 7526
$$
NIERENBERG/MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 10:54 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 43 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2008Every severe thunderstorm warning in 2008
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.