Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 245, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 25, 2006, 11:05 PM EDT for Chester County, Montgomery County, Pennsylvania. It was in force for 40 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
- Aug 25, 2006, 11:05 PM EDT (03:05 UTC)
- Expired
- Aug 25, 2006, 11:45 PM EDT
- In force
- 40 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), 104 km from the middle of the area, began a volume at 03:05 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 |
|---|---|---|---|
| Aug 25, 11:40 PM EDT | HAIL 1 | 7 S Kenilworth, PA | NICKEL TO QUARTER SIZE HAIL REPORTED ABOUT 7 MILES SOUTH OF KENILWORTH. |
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, 3.1 hours before the alert went out and 210 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
- 979 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1772 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 192 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 260305 SVRPHI PAC029-091-260345- /O.NEW.KPHI.SV.W.0245.060826T0305Z-060826T0345Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1105 PM EDT FRI AUG 25 2006 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA WESTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA * UNTIL 1145 PM EDT * AT 1101 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 POTTSTOWN...OR ABOUT 12 MILES EAST OF READING...AND MOVING SOUTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... POTTSTOWN BY 1110 PM EDT... 6 MILES SOUTHWEST OF SPRING MOUNT BY 1125 PM EDT... PHOENIXVILLE BY 1130 PM EDT... COLLEGEVILLE BY 1135 PM EDT... LAT...LON 4035 7556 4016 7583 4000 7565 4021 7530 $$ EBERWINE
1 follow-up statement
000 WWUS51 KPHI 260320 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1117 PM EDT FRI AUG 25 2006 PAC029-091-260345- /O.CON.KPHI.SV.W.0245.000000T0000Z-060826T0345Z/ CHESTER PA-MONTGOMERY PA- 1117 PM EDT FRI AUG 25 2006 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR WESTERN MONTGOMERY AND NORTHEASTERN CHESTER COUNTIES... AT 1113 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR KENILWORTH...OR ABOUT 18 MILES SOUTHEAST OF READING...MOVING SOUTHEAST AT 25 MPH. THE STORM PRODUCED NICKEL SIZE HAIL IN BIRDSBORO BERKS COUNTY AND MAY BE PRODUCING A GOOD DEAL OF HAIL ALONG THE NORTHEASTERN CHESTER AND NORTHWESTER MONTGOMERY COUNTIES. THE SEVERE THUNDERSTORM WILL BE NEAR... PHOENIXVILLE...TRAPPE...6 MILES SOUTHWEST OF COLLEGEVILLE AND 7 MILES NORTHEAST OF LIONVILLE BY 1125 PM EDT... 7 MILES NORTHEAST OF EXTON AND 7 MILES SOUTHWEST OF EAGLEVILLE BY 1130 PM EDT... LAT...LON 4035 7556 4016 7583 4000 7565 4021 7530 $$ EBERWINE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 10:43 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 32 min |
| Aug 25, 11:43 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 47 min |
| Aug 25, 11:53 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 52 min |
| Aug 26, 12:00 AM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 45 min |
| Aug 26, 1:55 AM EDT | Severe Thunderstorm Warning | PHI | Bucks | 50 min |
| Aug 26, 2:12 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh | 48 min |
| Aug 26, 3:05 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh | 55 min |
| Aug 26, 3:30 AM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 45 min |
| Aug 26, 4:11 AM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 49 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2006Every severe thunderstorm warning in 2006
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.