Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 155, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 6, 2005, 8:08 PM EST for Chester County, Montgomery County, Pennsylvania. It was in force for 67 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
- Nov 6, 2005, 8:08 PM EST (01:08 UTC)
- Expired
- Nov 6, 2005, 9:15 PM EST
- In force
- 67 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Chester County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 100 km from the middle of the area, began a volume at 01:08 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 |
|---|---|---|---|
| Nov 6, 8:20 PM EST | TSTM WND DMG | 5 Sw West Chester, PA | LIMBS AND WIRES DOWN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 1.1 hours before the alert went out and 204 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
- 186 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1702 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 320 m²/s²
- 0-3 km storm-relative helicity
- 268 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 070108
SVRPHI
PAC029-091-070215-
/O.NEW.KPHI.SV.W.0155.051107T0108Z-051107T0215Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 PM EST SUN NOV 6 2005
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA
* UNTIL 915 PM EST
* AT 804 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR PHOENIXVILLE...OR ABOUT 23
MILES SOUTHEAST OF READING...AND MOVING EAST AT 50 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
NORRISTOWN AND PLYMOUTH MEETING BY 815 PM EST
LANSDALE...AMBLER AND SOUDERTON BY 820 PM EST
LAT...LON 4017 7577 3976 7607 3987 7568 4006 7544
4005 7527 4020 7514 4035 7539 4039 7552
$$
MPD1 follow-up statement
000
WWUS51 KPHI 070147
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
846 PM EST SUN NOV 6 2005
PAC029-070156-
/O.CAN.KPHI.SV.W.0155.000000T0000Z-051107T0215Z/
CHESTER PA-
846 PM EST SUN NOV 6 2005
...THE SEVERE THUNDERSTORM WARNING FOR CHESTER COUNTY IS CANCELLED...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EST
SUNDAY EVENING FOR NORTHWESTERN NEW JERSEY AND NORTHEASTERN
PENNSYLVANIA.
LAT...LON 4020 7552 4016 7549 4012 7543 4009 7536
4005 7527 4020 7514 4024 7521 4022 7537
$$
PAC091-070215-
/O.CON.KPHI.SV.W.0155.000000T0000Z-051107T0215Z/
MONTGOMERY PA-
846 PM EST SUN NOV 6 2005
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EST
FOR CENTRAL MONTGOMERY COUNTY...
AT 843 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED JUST NORTHWEST OF
PHILADELPHIA...MOVING EAST AT 50 MPH.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EST
SUNDAY EVENING FOR NORTHWESTERN NEW JERSEY AND NORTHEASTERN
PENNSYLVANIA.
LAT...LON 4020 7552 4016 7549 4012 7543 4009 7536
4005 7527 4020 7514 4024 7521 4022 7537
$$
MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 6, 8:00 PM EST | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 60 min |
| Nov 6, 8:25 PM EST | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 47 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2005Every severe thunderstorm warning in 2005
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.