Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 96, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 26, 2009, 6:01 PM EDT for Bucks County, Montgomery County, Pennsylvania. It was in force for 59 min. 3 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 26, 2009, 6:01 PM EDT (22:01 UTC)
- Expired
- Jun 26, 2009, 7:00 PM EDT
- In force
- 59 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
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 22:04 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 26, 6:16 PM EDT | HAIL 1 | 9 S Geryville, PA | QUARTER SIZE HAIL IN UPPER POTTSGROVE TWP. |
| Jun 26, 6:39 PM EDT | HAIL 0.75 | 5 Ene Cedarville, PA | PENNY SIZE HAIL IN SANATOGA. |
| Jun 26, 6:57 PM EDT | HAIL 0.88 | 9 Sw Fricks, PA | NICKEL SIZE HAIL IN WORCESTER TWP. |
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 26, 2:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.0 hours before the alert went out and 111 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
- 1259 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 969 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 262201 SVRPHI PAC017-091-262300- /O.NEW.KPHI.SV.W.0096.090626T2201Z-090626T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 601 PM EDT FRI JUN 26 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 700 PM EDT * AT 600 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES WEST OF GILBERTSVILLE...OR 11 MILES EAST OF READING...AND MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... GILBERTSVILLE AROUND 615 PM EDT... SPRING MOUNT AROUND 630 PM EDT... SOUDERTON AROUND 645 PM EDT... LANSDALE AROUND 650 PM EDT... FRICKS AROUND 655 PM EDT... CHALFONT AROUND 700 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 1000 PM EDT FRIDAY EVENING FOR EASTERN PENNSYLVANIA. && LAT...LON 4042 7555 4041 7517 4011 7520 4027 7568 TIME...MOT...LOC 2200Z 280DEG 24KT 4035 7572 $$ SZATKOWSKI
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 3:31 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 59 min |
| Jun 26, 3:53 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 82 min |
| Jun 26, 4:51 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 69 min |
| Jun 26, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 55 min |
| Jun 26, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh | 59 min |
| Jun 26, 6:23 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 52 min |
| Jun 26, 6:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 45 min |
| Jun 26, 6:41 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 41 min |
| Jun 26, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 48 min |
| Jun 26, 7:10 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 50 min |
| Jun 26, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 60 min |
| Jun 26, 7:28 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 92 min |
| Jun 26, 7:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 45 min |
| Jun 26, 7:45 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 65 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2009Every severe thunderstorm warning in 2009
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.