Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 40, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 24, 2013, 7:47 PM EDT for Delaware County, Philadelphia County, Pennsylvania; New Castle County, Delaware. It was in force for 58 min. 2 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, 2013, 7:47 PM EDT (23:47 UTC)
- Expired
- Jun 24, 2013, 8:45 PM EDT
- In force
- 58 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 23:47 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, 7:47 PM EDT | TSTM WND DMG | Concord Hills, DE | APPROXIMATELY A DOZEN TREES DOWN... SOME FALLING ONTO CARS AND HOMES IN CONCORD HILLS NEAR ROUTE 202. |
| Jun 24, 7:49 PM EDT | TSTM WND DMG | Talleyville, DE | TREES AND WIRES DOWN. |
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, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.8 hours before the alert went out and 87 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
- 705 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 1279 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
353
WUUS51 KPHI 242347
SVRPHI
DEC003-PAC045-101-250045-
/O.NEW.KPHI.SV.W.0040.130624T2347Z-130625T0045Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
747 PM EDT MON JUN 24 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHEASTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
* UNTIL 845 PM EDT
* AT 745 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THE STORM WAS NEAR CHELSEA...MOVING EAST AT 25
MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING WIND GUSTS AND
HAIL.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
FOLCROFT AND PHILADELPHIA INTERNATIONAL AIRPORT AROUND 800 PM
EDT...
SOUTH PHILADELPHIA AND MORRIS PARK AROUND 810 PM EDT...
CENTER CITY AND KENSINGTON AROUND 815 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
MONDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3990 7557 4000 7530 3998 7527 4001 7521
4003 7522 4006 7513 4005 7511 4008 7505
4002 7503 3995 7514 3988 7515 3985 7527
3985 7534 3978 7544 3977 7557 3986 7560
TIME...MOT...LOC 2347Z 257DEG 55KT 3986 7544
$$
FORECASTER:1 follow-up statement
688
WWUS51 KPHI 250025
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
825 PM EDT MON JUN 24 2013
DEC003-PAC045-101-250035-
/O.CAN.KPHI.SV.W.0040.000000T0000Z-130625T0045Z/
PHILADELPHIA PA-DELAWARE PA-NEW CASTLE DE-
825 PM EDT MON JUN 24 2013
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE...
DELAWARE AND PHILADELPHIA COUNTIES IS CANCELLED...
THE STORM HAS WEAKENED TO BELOW SEVERE LIMITS...THEREFORE THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
MONDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.
LAT...LON 3990 7557 4000 7530 3998 7527 4001 7521
4003 7522 4006 7513 4005 7511 4008 7505
4002 7503 3995 7514 3988 7515 3985 7527
3985 7534 3978 7544 3977 7557 3986 7560
TIME...MOT...LOC 0025Z 257DEG 55KT 3999 7470
$$
FORECASTER:JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 1:22 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| Jun 24, 2:07 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 3 hr |
| Jun 24, 2:32 PM EDT | Special Weather Statement | PHI | Chester, Delaware, Philadelphia | 58 min |
| Jun 24, 3:40 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 50 min |
| Jun 24, 4:50 PM EDT | Special Weather Statement | PHI | Northampton | 40 min |
| Jun 24, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 42 min |
| Jun 24, 6:25 PM EDT | Special Weather Statement | PHI | Chester | 50 min |
| Jun 24, 3:23 PM EDT | Special Weather Statement | PHI | New Castle | 52 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2013Severe Thunderstorm Warnings in Delaware, 2013Every severe thunderstorm warning in 2013
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.