Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 158, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 6, 2014, 3:45 PM EDT for Bucks County, Montgomery County, Pennsylvania; Hunterdon County, Mercer County, New Jersey. It was in force for 60 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 6, 2014, 3:45 PM EDT (19:45 UTC)
- Expired
- Sep 6, 2014, 4:45 PM EDT
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 76 km from the middle of the area, began a volume at 19:48 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 6, 2:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.8 hours before the alert went out and 193 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
- 1867 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 709 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
623 WUUS51 KPHI 061945 SVRPHI NJC019-021-PAC017-091-062045- /O.NEW.KPHI.SV.W.0158.140906T1945Z-140906T2045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 345 PM EDT SAT SEP 6 2014 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY... NORTHWESTERN MERCER COUNTY IN CENTRAL NEW JERSEY... CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... CENTRAL MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 445 PM EDT * AT 344 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THE STORM WAS NEAR SILVERDALE...MOVING EAST AT 20 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FRICKS AND CHALFONT AROUND 350 PM EDT... DUBLIN AROUND 355 PM EDT... ROBESONIA AND DOYLESTOWN AROUND 405 PM EDT... GARDENVILLE AND PIPERSVILLE AROUND 410 PM EDT... TINICUM AROUND 415 PM EDT... BYRAM AND ERWINNA AROUND 420 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE NATIONAL WEATHER SERVICE. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 4057 7482 4025 7476 4021 7546 4041 7551 TIME...MOT...LOC 1945Z 259DEG 18KT 4032 7527 $$ FORECASTER: SFJ
3 follow-up statements
474 WWUS51 KPHI 062007 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 407 PM EDT SAT SEP 6 2014 PAC091-062016- /O.CAN.KPHI.SV.W.0158.000000T0000Z-140906T2045Z/ MONTGOMERY PA- 407 PM EDT SAT SEP 6 2014 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MONTGOMERY COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE COUNTY. THUS...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING FOR NORTHEAST NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. LAT...LON 4023 7517 4047 7526 4057 7482 4025 7477 TIME...MOT...LOC 2006Z 259DEG 18KT 4041 7505 $$ NJC019-021-PAC017-062045- /O.CON.KPHI.SV.W.0158.000000T0000Z-140906T2045Z/ HUNTERDON NJ-MERCER NJ-BUCKS PA- 407 PM EDT SAT SEP 6 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT FOR CENTRAL BUCKS...NORTHWESTERN MERCER AND SOUTHERN HUNTERDON COUNTIES... AT 404 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BYRAM...OR 21 MILES SOUTH OF EASTON...MOVING EAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... STOCKTON BY 415 PM EDT... LAMBERTVILLE AND NEW HOPE BY 420 PM EDT... SERGEANTSVILLE BY 425 PM EDT... SAND BROOK BY 430 PM EDT... FLEMINGTON AND 9 MILES NORTH OF PENNINGTON BY 440 PM EDT... 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. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. LAT...LON 4023 7517 4047 7526 4057 7482 4025 7477 TIME...MOT...LOC 2006Z 259DEG 18KT 4041 7505 $$ SFJ
137 WWUS51 KPHI 062034 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 434 PM EDT SAT SEP 6 2014 PAC017-062044- /O.CAN.KPHI.SV.W.0158.000000T0000Z-140906T2045Z/ BUCKS PA- 434 PM EDT SAT SEP 6 2014 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BUCKS COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE COUNTY. THUS THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING FOR NORTHEAST NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. LAT...LON 4025 7483 4052 7503 4057 7482 4025 7477 TIME...MOT...LOC 2034Z 259DEG 18KT 4044 7487 $$ NJC019-021-062045- /O.CON.KPHI.SV.W.0158.000000T0000Z-140906T2045Z/ HUNTERDON NJ-MERCER NJ- 434 PM EDT SAT SEP 6 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT FOR NORTHWESTERN MERCER AND SOUTHERN HUNTERDON COUNTIES... AT 436 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SAND BROOK...OR 16 MILES NORTH OF TRENTON...MOVING EAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... FLEMINGTON AND 8 MILES NORTH OF PENNINGTON BY 440 PM EDT... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. LAT...LON 4025 7483 4052 7503 4057 7482 4025 7477 TIME...MOT...LOC 2034Z 259DEG 18KT 4044 7487 $$ SFJ
997 WWUS51 KPHI 062039 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 439 PM EDT SAT SEP 6 2014 NJC019-021-062047- /O.EXP.KPHI.SV.W.0158.000000T0000Z-140906T2045Z/ HUNTERDON NJ-MERCER NJ- 439 PM EDT SAT SEP 6 2014 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MERCER AND SOUTHERN HUNTERDON COUNTIES WILL EXPIRE AT 445 PM EDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED. THUS...THE WARNING WILL BE ALLOWED TO EXPIRE AT 445 PM EDT. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. LAT...LON 4025 7483 4052 7503 4057 7482 4025 7477 TIME...MOT...LOC 2037Z 259DEG 18KT 4044 7485 $$ SFJ
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 1:37 PM EDT | Special Weather Statement | PHI | Northampton | 53 min |
| Sep 6, 2:13 PM EDT | Special Weather Statement | PHI | Chester | 62 min |
| Sep 6, 2:19 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 43 min |
| Sep 6, 2:43 PM EDT | Areal Flood Advisory | PHI | Chester | 4 hr |
| Sep 6, 3:21 PM EDT | Special Weather Statement | PHI | Berks, Bucks, Lehigh, Montgomery | 54 min |
| Sep 6, 3:51 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Sep 6, 4:52 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 36 min |
| Sep 6, 7:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 54 min |
| Sep 6, 1:46 PM EDT | Special Weather Statement | PHI | Sussex | 59 min |
| Sep 6, 2:58 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Somerset | 4 hr |
| Sep 6, 3:19 PM EDT | Special Weather Statement | PHI | Middlesex | 26 min |
| Sep 6, 3:25 PM EDT | Special Weather Statement | PHI | Mercer | 65 min |
| Sep 6, 3:32 PM EDT | Special Weather Statement | PHI | Hunterdon | 58 min |
| Sep 6, 4:03 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth | 57 min |
| Sep 6, 4:19 PM EDT | Special Marine Warning | PHI | 56 min | |
| Sep 6, 4:45 PM EDT | Special Weather Statement | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 60 min |
| Sep 6, 4:47 PM EDT | Special Weather Statement | PHI | Burlington | 58 min |
| Sep 6, 4:54 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 43 min |
| Sep 6, 4:58 PM EDT | Special Marine Warning | PHI | 62 min | |
| Sep 6, 5:09 PM EDT | Special Marine Warning | PHI | 66 min | |
| Sep 6, 5:26 PM EDT | Special Marine Warning | PHI | 64 min | |
| Sep 6, 5:31 PM EDT | Special Weather Statement | PHI | Burlington | 59 min |
| Sep 6, 5:44 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 35 min |
| Sep 6, 6:41 PM EDT | Special Weather Statement | PHI | Salem | 64 min |
| Sep 6, 7:41 PM EDT | Special Marine Warning | PHI | 64 min | |
| Sep 6, 7:45 PM EDT | Special Weather Statement | PHI | Cape May | 60 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2014Severe Thunderstorm Warnings in New Jersey, 2014Every severe thunderstorm warning in 2014
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.