Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 83, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2015, 8:15 PM EDT for 4 counties in Pennsylvania. It was in force for 28 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
- Jun 30, 2015, 8:15 PM EDT (00:15 UTC)
- Expired
- Jun 30, 2015, 8:43 PM EDT
- In force
- 28 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 60 km from the middle of the area, began a volume at 00:16 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 00:00Z, 0.3 hours before the alert went out and 206 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1407 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
082 WUUS51 KPHI 010015 SVRPHI PAC017-045-091-101-010115- /O.NEW.KPHI.SV.W.0083.150701T0015Z-150701T0115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 815 PM EDT TUE JUN 30 2015 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL DELAWARE COUNTY IN SOUTHEASTERN PENNSYLVANIA... SOUTH CENTRAL BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA... PHILADELPHIA COUNTY IN SOUTHEASTERN PENNSYLVANIA... SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA... * UNTIL 915 PM EDT * AT 815 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER ROXBOROUGH...OR NEAR PHILADELPHIA...AND MOVING NORTHEAST AT 15 MPH. * LOCATIONS IMPACTED INCLUDE... PHILADELPHIA...BENSALEM...HATBORO...AMBLER...JENKINTOWN... NARBERTH...ROCKLEDGE...ABINGTON...BRYN ATHYN...IVYLAND... KENSINGTON...MORRIS PARK...FEASTERVILLE-TREVOSE...GERMANTOWN... ROXBOROUGH...TACONY...WILLOW GROVE...CHESTNUT HILL...FEASTERVILLE AND NORTHEAST PHILADELPHIA. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. IN ADDITION TO LARGE HAIL AND 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. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 4015 7488 3993 7518 3997 7532 4028 7515 TIME...MOT...LOC 0015Z 208DEG 15KT 3999 7523 $$ HEAVENER
2 follow-up statements
290
WWUS51 KPHI 010027
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
827 PM EDT TUE JUN 30 2015
PAC045-010037-
/O.CAN.KPHI.SV.W.0083.000000T0000Z-150701T0115Z/
DELAWARE PA-
827 PM EDT TUE JUN 30 2015
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DELAWARE COUNTY
IS CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 4015 7488 3998 7514 3998 7520 4002 7529
4028 7515
TIME...MOT...LOC 0027Z 208DEG 15KT 4002 7521
$$
PAC017-091-101-010115-
/O.CON.KPHI.SV.W.0083.000000T0000Z-150701T0115Z/
BUCKS PA-PHILADELPHIA PA-MONTGOMERY PA-
827 PM EDT TUE JUN 30 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR SOUTH CENTRAL BUCKS...NORTHERN PHILADELPHIA AND SOUTHEASTERN
MONTGOMERY COUNTIES...
AT 827 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED OVER GERMANTOWN...OR NEAR PHILADELPHIA.
THIS STORM WAS NEARLY STATIONARY.
LOCATIONS IMPACTED INCLUDE...
PHILADELPHIA...BENSALEM...HATBORO...AMBLER...JENKINTOWN...NARBERTH...
ROCKLEDGE...ABINGTON...BRYN ATHYN...IVYLAND...KENSINGTON...
FEASTERVILLE-TREVOSE...GERMANTOWN...ROXBOROUGH...WILLOW GROVE...
CHESTNUT HILL...FEASTERVILLE...NORTHEAST PHILADELPHIA...CENTER CITY
AND RICHBORO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4015 7488 3998 7514 3998 7520 4002 7529
4028 7515
TIME...MOT...LOC 0027Z 208DEG 15KT 4002 7521
$$
HEAVENER433
WWUS51 KPHI 010043
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
843 PM EDT TUE JUN 30 2015
PAC017-091-101-010052-
/O.CAN.KPHI.SV.W.0083.000000T0000Z-150701T0115Z/
BUCKS PA-PHILADELPHIA PA-MONTGOMERY PA-
843 PM EDT TUE JUN 30 2015
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL BUCKS...NORTHERN
PHILADELPHIA AND SOUTHEASTERN MONTGOMERY COUNTIES IS CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED.
THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 4015 7488 3998 7514 3998 7520 4002 7529
4028 7515
TIME...MOT...LOC 0039Z 208DEG 15KT 4007 7518
$$
HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 8:03 PM EDT | Special Weather Statement | PHI | Philadelphia | 27 min |
| Jun 30, 8:23 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Jun 30, 8:26 PM EDT | Areal Flood Advisory | PHI | Monroe | 4 hr |
| Jul 1, 1:42 AM EDT | Severe Thunderstorm Warning | PHI | Chester | 48 min |
| Jul 1, 2:14 AM EDT | Areal Flood Advisory | PHI | Berks, Chester, Delaware, Lehigh, Montgomery, Philadelphia | 4 hr |
| Jul 1, 2:17 AM EDT | Severe Thunderstorm Warning | PHI | Delaware | 43 min |
| Jul 1, 2:47 AM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jul 1, 2:50 AM EDT | Special Weather Statement | PHI | Delaware, Philadelphia | 55 min |
| Jul 1, 4:48 AM EDT | Areal Flood Warning | PHI | Monroe | 10 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2015Every severe thunderstorm warning in 2015
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.