Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 101, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 2, 2013, 10:29 AM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 76 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 2, 2013, 10:29 AM EDT (14:29 UTC)
- Expired
- Sep 2, 2013, 11:45 AM EDT
- In force
- 76 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 14:30 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 2.5 hours before the alert went out and 203 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
- 791 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 538 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
721
WUUS51 KPHI 021429
SVRPHI
PAC017-091-101-021545-
/O.NEW.KPHI.SV.W.0101.130902T1429Z-130902T1545Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1029 AM EDT MON SEP 2 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHEASTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 1145 AM EDT
* AT 1026 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THE STORM WAS NEAR PHILADELPHIA...MOVING
NORTHEAST AT 10 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
WISSINOMING AROUND 1035 AM EDT...
TACONY AROUND 1045 AM EDT...
HOLMESBURG AND ROCKLEDGE AROUND 1050 AM EDT...
NORTHEAST PHILADELPHIA AND ANDALUSIA AROUND 1110 AM EDT...
BRYN ATHYN AROUND 1115 AM EDT...
BENSALEM AROUND 1125 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER. SEEK SHELTER INDOORS IMMEDIATELY.
VERY HEAVY RAIN WILL ALSO OCCUR WITH THIS SEVERE THUNDERSTORM...WHICH
COULD FLOOD LOW LYING AREAS QUICKLY AND COVER ROADS WITH WATER. DO
NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4007 7491 4007 7494 4002 7502 4001 7505
3999 7506 3998 7508 3997 7510 4003 7516
4024 7502 4012 7482
TIME...MOT...LOC 1429Z 222DEG 9KT 4001 7509
$$
TFG2 follow-up statements
365
WWUS51 KPHI 021506
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1106 AM EDT MON SEP 2 2013
PAC017-091-101-021545-
/O.CON.KPHI.SV.W.0101.000000T0000Z-130902T1545Z/
BUCKS PA-MONTGOMERY PA-PHILADELPHIA PA-
1106 AM EDT MON SEP 2 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT
FOR NORTHEASTERN PHILADELPHIA...SOUTHEASTERN MONTGOMERY AND SOUTH
CENTRAL BUCKS COUNTIES...
AT 1100 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP
TO 60 MPH. TREE DAMAGE HAS OCCURRED IN PHILADELPHIA.
THIS STORM WAS LOCATED NEAR ROCKLEDGE...OR 7 MILES
NORTHEAST OF PHILADELPHIA...MOVING NORTHEAST AT 10 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
NORTHEAST PHILADELPHIA AROUND 1110 AM EDT...
BRYN ATHYN AROUND 1120 AM EDT...
BENSALEM AROUND 1125 AM EDT...
FEASTERVILLE AROUND 1140 AM EDT...
CHURCHVILLE AND VILLAGE SHIRES AROUND 1145 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.
&&
LAT...LON 4012 7491 4008 7495 4006 7501 4004 7504
4005 7507 4005 7510 4007 7514 4024 7502
4014 7486
TIME...MOT...LOC 1505Z 210DEG 9KT 4009 7505
$$
TFG489
WWUS51 KPHI 021516
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1116 AM EDT MON SEP 2 2013
PAC017-091-101-021527-
/O.CAN.KPHI.SV.W.0101.000000T0000Z-130902T1545Z/
BUCKS PA-MONTGOMERY PA-PHILADELPHIA PA-
1116 AM EDT MON SEP 2 2013
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PHILADELPHIA...
SOUTHEASTERN MONTGOMERY AND SOUTH CENTRAL BUCKS COUNTIES IS
CANCELLED...
THE STORM HAS WEAKENED TO BELOW SEVERE LIMITS...THEREFORE THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.
LAT...LON 4012 7491 4008 7495 4006 7501 4004 7504
4005 7507 4005 7510 4007 7514 4024 7502
4014 7486
TIME...MOT...LOC 1517Z 210DEG 9KT 4012 7503
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 4:56 AM EDT | Special Weather Statement | PHI | Carbon | 49 min |
| Sep 2, 5:34 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 56 min |
| Sep 2, 7:09 AM EDT | Areal Flood Advisory | PHI | Northampton | 4 hr |
| Sep 2, 9:37 AM EDT | Areal Flood Advisory | PHI | Philadelphia | 113 min |
| Sep 2, 9:52 AM EDT | Flash Flood Warning | PHI | Philadelphia | 4 hr |
| Sep 2, 10:50 AM EDT | Areal Flood Advisory | PHI | Delaware | 3 hr |
| Sep 2, 11:27 AM EDT | Areal Flood Advisory | PHI | Delaware, Montgomery, Philadelphia | 3 hr |
| Sep 2, 12:37 PM EDT | Flash Flood Warning | PHI | Delaware | 3 hr |
| Sep 2, 12:44 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Sep 2, 3:06 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 114 min |
| Sep 2, 3:14 PM EDT | Special Weather Statement | PHI | Northampton | 61 min |
| Sep 2, 4:02 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 43 min |
| Sep 2, 4:44 PM EDT | Special Weather Statement | PHI | Lehigh | 46 min |
| Sep 2, 4:52 PM EDT | Special Weather Statement | PHI | Bucks | 38 min |
| Sep 2, 5:05 PM EDT | Areal Flood Advisory | PHI | Lehigh | 115 min |
| Sep 2, 5:39 PM EDT | Flash Flood Warning | PHI | Lehigh | 2 hr |
| Sep 2, 5:46 PM EDT | Special Weather Statement | PHI | Lehigh | 44 min |
| Sep 2, 6:57 PM EDT | Special Weather Statement | PHI | Montgomery | 48 min |
| Sep 2, 7:59 PM EDT | Special Weather Statement | PHI | Chester | 46 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.