Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 76, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 24, 2010, 2:56 PM EDT for 4 counties in Pennsylvania; New Castle County, Delaware. It was in force for 64 min. 15 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 24, 2010, 2:56 PM EDT (18:56 UTC)
- Expired
- Jun 24, 2010, 4:00 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 18:58 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 24, 3:20 PM EDT | HAIL 1 | 2 Ssw Aldan, PA | QUARTER SIZE HAIL IN HAVERTOWN |
| Jun 24, 3:20 PM EDT | HAIL 1 | Ridley Park, PA | QUARTER SIZE HAIL IN RIDLEY CREEK STATE PARK |
| Jun 24, 3:25 PM EDT | HAIL 1 | 2 Sw Morris Park, PA | QUARTER SIZE HAIL IN UPPER DARBY |
| Jun 24, 3:28 PM EDT | HAIL 1 | Lansdowne, PA | QUARTER SIZE HAIL IN LANSDOWNE |
| Jun 24, 3:30 PM EDT | TSTM WND DMG | Clifton Heights, PA | NUMEROUS LARGE TREES DOWN WITH PROPERTY DAMAGE IN CLIFTON HEIGHTS. |
| Jun 24, 3:30 PM EDT | TSTM WND DMG | Nne Newtown Grant, PA | TREES DOWN, TRAFFIC LIGHTS OUT. |
| Jun 24, 3:30 PM EDT | TSTM WND DMG | Philadelphia, PA | SEVERAL LARGE TREES DOWN NEAR CITIZENS BANK BALL PARK IN PHILADELPHIA. |
| Jun 24, 3:30 PM EDT | TSTM WND DMG | Sharon Hill, PA | TREE BLOCKING CALCON HOOK ROAD |
| Jun 24, 3:30 PM EDT | TSTM WND DMG | Springfield, PA | NUMEROUS LARGE TREES DOWN WITH PROPERTY DAMAGE IN SPRINGFIELD |
| Jun 24, 3:30 PM EDT | TSTM WND GST 76 | Drexel Hill, PA | 76 MPH WIND GUST MEASURED WITH SEVERAL TREES DOWN ON HOUSES AND GARAGE CRUSHED IN DREXEL HILL |
| Jun 24, 3:30 PM EDT | HAIL 1 | Philadelphia, PA | QUARTER SIZE HAIL ALONG WITH NUMEROUS TREES DOWN IN CLARK PARK AND OTHER PORTIONS OF THE CITY. |
| Jun 24, 3:30 PM EDT | HAIL 1.5 | Drexel Hill, PA | 1 AND A HALF INCH HAIL IN DREXEL HILL WITH TREES DOWN AND CAR WINDOWS BLOWN OUT. |
| Jun 24, 3:30 PM EDT | HAIL 1.75 | Yeadon, PA | GOLF BALL SIZE HAIL IN YEADON |
| Jun 24, 3:31 PM EDT | TSTM WND GST 75 | Philadelphia Intl Airpo, PA | 65 KNOTS MEASURED AT PHILADELPHIA INTL AIRPORT |
| Jun 24, 4:00 PM EDT | TSTM WND DMG | Philadelphia Intl Airpo, PA | TREES AND POWER WIRES DOWN, ALONG WITH TROLLY WIRES KNOCKED DOWN IN UNIVERSITY CITY AREA OF PHILADELPHIA |
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 24, 12:28 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.9 hours before the alert went out and 81 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
- 126 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 1592 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
848
WUUS51 KPHI 241856
SVRPHI
DEC003-PAC029-045-091-101-242000-
/O.NEW.KPHI.SV.W.0076.100624T1856Z-100624T2000Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
256 PM EDT THU JUN 24 2010
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITY OF WILMINGTON...
SOUTHEASTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF WEST CHESTER...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF PHILADELPHIA...
* UNTIL 400 PM EDT
* AT 254 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
EXCESS OF 70 MPH. THIS STORM WAS LOCATED 14 MILES NORTHWEST OF
WEST CHESTER...AND MOVING EAST AT 50 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
PAOLI AND VALLEY FORGE AROUND 310 PM EDT...
KING OF PRUSSIA AROUND 315 PM EDT...
RADNOR TOWNSHIP...TROUT LAKE...NEWTOWN SQUARE AND BROOMALL AROUND
320 PM EDT...
NARBERTH...BRYN MAWR AND MORRIS PARK AROUND 325 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. THIS
IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
THURSDAY EVENING FOR NORTHEAST PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEASTERN
PENNSYLVANIA.
&&
LAT...LON 3976 7583 4028 7533 4022 7515 4011 7497
4003 7499 3995 7514 3989 7514 3988 7515
3985 7525 3984 7537 3979 7542 3976 7547
3972 7548 3969 7552
TIME...MOT...LOC 1855Z 285DEG 45KT 4011 7576
$$
KRUZDLO1 follow-up statement
381
WWUS51 KPHI 241918
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
318 PM EDT THU JUN 24 2010
DEC003-PAC029-045-091-101-242000-
/O.CON.KPHI.SV.W.0076.000000T0000Z-100624T2000Z/
DELAWARE PA-PHILADELPHIA PA-CHESTER PA-MONTGOMERY PA-NEW CASTLE DE-
318 PM EDT THU JUN 24 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHERN NEW CASTLE...SOUTHEASTERN MONTGOMERY...SOUTHEASTERN
CHESTER...PHILADELPHIA AND DELAWARE COUNTIES...
AT 315 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS
IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR NEWTOWN SQUARE...OR
11 MILES EAST OF WEST CHESTER...MOVING SOUTHEAST AT 55 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
DARBY...COLWYN...COLLINGDALE AND SOUTH PHILADELPHIA BY 325 PM
EDT...
7 MILES SOUTHWEST OF CENTER CITY...7 MILES SOUTHWEST OF KENSINGTON
AND 8 MILES SOUTHWEST OF PHILADELPHIA BY 330 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. THIS
IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
THURSDAY EVENING FOR NORTHEAST PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEASTERN
PENNSYLVANIA.
&&
LAT...LON 3976 7583 4028 7533 4022 7515 4011 7497
4003 7499 3995 7514 3989 7514 3988 7515
3985 7525 3984 7537 3979 7542 3976 7547
3972 7548 3969 7552
TIME...MOT...LOC 1917Z 294DEG 48KT 3995 7537
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 12:36 PM EDT | Special Weather Statement | PHI | Monroe | 54 min |
| Jun 24, 1:16 PM EDT | Special Weather Statement | PHI | Monroe | 59 min |
| Jun 24, 1:59 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 66 min |
| Jun 24, 2:31 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 59 min |
| Jun 24, 3:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 62 min |
| Jun 24, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 61 min |
| Jun 24, 4:18 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 57 min |
| Jun 24, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 87 min |
| Jun 24, 5:46 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 59 min |
| Jun 24, 6:53 PM EDT | Special Weather Statement | PHI | Sussex | 67 min |
| Jun 24, 7:14 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 50 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2010Severe Thunderstorm Warnings in Delaware, 2010Every severe thunderstorm warning in 2010
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.