Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 34, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 8, 2015, 7:19 PM EDT for Bucks County, Chester County, Montgomery County, Pennsylvania. It was in force for 56 min. 1 report 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 8, 2015, 7:19 PM EDT (23:19 UTC)
- Expired
- Jun 8, 2015, 8:15 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Chester County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 23:23 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 8, 7:40 PM EDT | HAIL 0.75 | Skippack, PA |
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 8, 4:13 PM EDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.3 hours before the alert went out and 114 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
- 1116 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 333 m²/s²
- 0-3 km storm-relative helicity
- 360 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
153
WUUS51 KPHI 082319
SVRPHI
PAC017-029-091-090015-
/O.NEW.KPHI.SV.W.0034.150608T2319Z-150609T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
719 PM EDT MON JUN 8 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA...
SOUTHERN BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...
NORTHEASTERN CHESTER COUNTY IN SOUTHEASTERN PENNSYLVANIA...
* UNTIL 815 PM EDT
* AT 718 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 POTTSTOWN...OR 18 MILES EAST
OF READING...AND MOVING EAST AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
POTTSTOWN...PHOENIXVILLE...LANSDALE... WEST NORRITON...
EAST NORRITON...DOYLESTOWN...HATBORO...SOUDERTON... AMBLER...
COLLEGEVILLE...ROYERSFORD...CHALFONT...TRAPPE... HATFIELD...
NEW HOPE...NEWTOWN...LANGHORNE... SCHWENKSVILLE AND BRYN ATHYN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE AREA. ALTHOUGH A TORNADO IS
NOT IMMEDIATELY LIKELY...IF ONE IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
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.
&&
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FOR NORTHWESTERN
NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA.
LAT...LON 4030 7565 4033 7562 4037 7495 4033 7494
4030 7488 4011 7488 4012 7498 4012 7504
4016 7569
TIME...MOT...LOC 2318Z 268DEG 38KT 4023 7560
$$
NIERENBERG1 follow-up statement
274
WWUS51 KPHI 082358
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
758 PM EDT MON JUN 8 2015
PAC029-090006-
/O.CAN.KPHI.SV.W.0034.000000T0000Z-150609T0015Z/
CHESTER PA-
758 PM EDT MON JUN 8 2015
...THE SEVERE THUNDERSTORM WARNING THE FOLLOWING COUNTIES...
NORTHEASTERN CHESTER COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HASMOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 4025 7537 4032 7537 4037 7495 4033 7494
4030 7488 4011 7488 4012 7498 4012 7504
4014 7539
TIME...MOT...LOC 2356Z 268DEG 38KT 4024 7506
$$
PAC017-091-090015-
/O.CON.KPHI.SV.W.0034.000000T0000Z-150609T0015Z/
MONTGOMERY PA-BUCKS PA-
758 PM EDT MON JUN 8 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
THE FOLLOWING COUNTIES CENTRAL MONTGOMERY AND SOUTHERN
BUCKS COUNTIES...
AT 756 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 IVYLAND...OR 16 MILES WEST OF
TRENTON...MOVING EAST AT 45 MPH.
LOCATIONS IMPACTED INCLUDE... NORRISTOWN...LANSDALE...WEST
NORRITON...EAST
NORRITON...DOYLESTOWN...HATBORO...SOUDERTON...AMBLER...CHALFONT...
HATFIELD...NEW HOPE...NEWTOWN...LANGHORNE...BRYN ATHYN...IVYLAND...
FEASTERVILLE-TREVOSE...FRICKS...WILLOW GROVE AND FEASTERVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. ALTHOUGH A
TORNADO IS NOT IMMEDIATELY LIKELY...IF ONE IS SPOTTED...ACT QUICKLY
AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A
BASEMENT OR SMALL INTERIOR ROOM.
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.
&&
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FOR NORTHWESTERN
NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA.
LAT...LON 4025 7537 4032 7537 4037 7495 4033 7494
4030 7488 4011 7488 4012 7498 4012 7504
4014 7539
TIME...MOT...LOC 2356Z 268DEG 38KT 4024 7506
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 4:34 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 116 min |
| Jun 8, 5:17 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 58 min |
| Jun 8, 5:51 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 54 min |
| Jun 8, 6:15 PM EDT | Special Weather Statement | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 2 hr |
| Jun 8, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Northampton | 59 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.