Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 215, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 8, 2012, 4:29 PM EDT for 7 counties in New Jersey; Bucks County, Montgomery County, Pennsylvania. It was in force for 61 min. 3 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
- Sep 8, 2012, 4:29 PM EDT (20:29 UTC)
- Expired
- Sep 8, 2012, 5:30 PM EDT
- In force
- 61 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 20:28 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 |
|---|---|---|---|
| Sep 8, 4:30 PM EDT | TSTM WND GST 60 | Chester, NJ | ESTIMATED WIND GUST OF 55 TO 60 MPH. |
| Sep 8, 4:31 PM EDT | TSTM WND GST 50 | Andover, NJ | |
| Sep 8, 4:53 PM EDT | TSTM WND DMG | Parsippany, NJ | LARGE TREE LIMBS DOWN IN PARSIPPANY. |
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 |
|---|---|---|---|
| Sep 8, 12:15 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.5 hours before the alert went out and 137 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
- 173 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 793 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
947
WUUS51 KPHI 082029
SVRPHI
NJC019-021-023-027-035-037-041-PAC017-091-082130-
/O.NEW.KPHI.SV.W.0215.120908T2029Z-120908T2130Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
429 PM EDT SAT SEP 8 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MERCER COUNTY IN CENTRAL NEW JERSEY...
THIS INCLUDES THE CITY OF TRENTON...
MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITIES OF...SOUTH AMBOY...PERTH AMBOY...NEW
BRUNSWICK...
MORRIS COUNTY IN NORTHERN NEW JERSEY...
SOMERSET COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF SOMERVILLE...
EASTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
THIS INCLUDES THE CITY OF NEWTON...
EASTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...
SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 530 PM EDT
* AT 423 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 10 MILES NORTHEAST OF HIGH POINT TO ALLAMUCHY-PANTHER VALLEY
TO WHITE HOUSE STATION TO AMBLER...OR ALONG A LINE EXTENDING FROM
29 MILES NORTHEAST OF NEWTON TO 12 MILES SOUTHWEST OF NEWTON TO 10
MILES WEST OF SOMERVILLE TO 11 MILES NORTH OF PHILADELPHIA...AND
MOVING EAST AT 40 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
CLOVERHILL...BRIDGEWATER...RICHBORO AND BRYN ATHYN AROUND 435 PM
EDT...
FLAGTOWN...FEASTERVILLE...SUCCASUNNA AND MOUNT ARLINGTON AROUND 440
PM EDT...
SKILLMAN AND MILLINGTON AROUND 445 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4121 7437 4109 7450 4104 7450 4105 7445
4098 7428 4090 7427 4090 7433 4074 7436
4067 7445 4067 7440 4061 7443 4060 7421
4050 7426 4045 7422 4027 7440 4021 7455
4006 7533 4056 7488 4086 7504 4136 7471
TIME...MOT...LOC 2028Z 256DEG 36KT 4144 7445 4090 7479
4058 7475 4017 7514
$$
MPD2 follow-up statements
006
WWUS51 KPHI 082111
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
511 PM EDT SAT SEP 8 2012
NJC019-037-041-PAC091-082121-
/O.CAN.KPHI.SV.W.0215.000000T0000Z-120908T2130Z/
WARREN NJ-HUNTERDON NJ-SUSSEX NJ-MONTGOMERY PA-
511 PM EDT SAT SEP 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONTGOMERY...
SUSSEX...EASTERN HUNTERDON AND EASTERN WARREN COUNTIES IS
CANCELLED...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 4050 7426 4045 7422 4028 7440 4021 7456
4014 7494 4042 7480 4043 7475 4048 7478
4087 7446 4102 7452 4105 7445 4102 7443
4098 7428 4091 7427 4090 7433 4074 7436
4067 7445 4067 7440 4061 7443 4060 7421
TIME...MOT...LOC 2111Z 255DEG 34KT 4155 7397 4104 7426
4088 7416 4016 7481
$$
NJC021-023-027-035-PAC017-082130-
/O.CON.KPHI.SV.W.0215.000000T0000Z-120908T2130Z/
MERCER NJ-MORRIS NJ-SOMERSET NJ-BUCKS PA-MIDDLESEX NJ-
511 PM EDT SAT SEP 8 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR MIDDLESEX...SOUTHEASTERN BUCKS...SOMERSET...EASTERN MORRIS AND
MERCER COUNTIES...
AT 508 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF THUNDERSTORMS WITH A HISTORY OF FELLING TREES AND
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 43 MILES NORTHEAST
OF KINNELON TO PEQUANNOCK TOWNSHIP TO 6 MILES SOUTHEAST OF LINCOLN
PARK TO FAIRLESS HILLS...OR ALONG A LINE EXTENDING FROM 44 MILES
NORTH OF PATERSON TO 11 MILES NORTHWEST OF PATERSON TO CLIFTON TO 7
MILES SOUTHWEST OF TRENTON...MOVING EAST AT 40 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
EDINBURG...WHITE HORSE...NORTH BRUNSWICK AND NEW BRUNSWICK BY 520
PM EDT...
WINDSOR...WOODBRIDGE...SOUTH RIVER AND ROSSMOOR BY 525 PM EDT...
PORT READING AND CARTERET BY 530 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4050 7426 4045 7422 4028 7440 4021 7456
4014 7494 4042 7480 4043 7475 4048 7478
4087 7446 4102 7452 4105 7445 4102 7443
4098 7428 4091 7427 4090 7433 4074 7436
4067 7445 4067 7440 4061 7443 4060 7421
TIME...MOT...LOC 2111Z 255DEG 34KT 4155 7397 4104 7426
4088 7416 4016 7481
$$
MPD350
WWUS51 KPHI 082124
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
524 PM EDT SAT SEP 8 2012
NJC021-023-027-035-PAC017-082134-
/O.EXP.KPHI.SV.W.0215.000000T0000Z-120908T2130Z/
MERCER NJ-MORRIS NJ-SOMERSET NJ-BUCKS PA-MIDDLESEX NJ-
524 PM EDT SAT SEP 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR MIDDLESEX...SOUTHEASTERN
BUCKS...SOMERSET...EASTERN MORRIS AND MERCER COUNTIES WILL EXPIRE AT
530 PM EDT...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 4050 7426 4045 7422 4028 7440 4021 7456
4014 7494 4042 7480 4043 7475 4048 7478
4087 7446 4102 7452 4105 7445 4102 7443
4098 7428 4091 7427 4090 7433 4074 7436
4067 7445 4067 7440 4061 7443 4060 7421
TIME...MOT...LOC 2124Z 255DEG 34KT 4158 7381 4107 7410
4091 7400 4019 7466
$$
MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 9:15 PM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 23 hr |
| Sep 8, 8:31 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 82 min |
| Sep 8, 9:31 AM EDT | Special Weather Statement | PHI | Monmouth | 59 min |
| Sep 8, 10:17 AM EDT | Special Weather Statement | PHI | Monmouth | 43 min |
| Sep 8, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Morris, Sussex, Warren | 60 min |
| Sep 8, 4:07 PM EDT | Special Weather Statement | PHI | Camden, Gloucester, Mercer, Middlesex, Morris, Salem and 1 more | 83 min |
| Sep 8, 5:30 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more | 90 min |
| Sep 8, 5:47 PM EDT | Special Marine Warning | PHI | 58 min | |
| Sep 8, 6:17 PM EDT | Special Weather Statement | PHI | Atlantic, Cape May, Cumberland | 58 min |
| Sep 8, 6:25 PM EDT | Special Marine Warning | PHI | 110 min | |
| Sep 8, 7:09 PM EDT | Special Weather Statement | PHI | Atlantic, Ocean | 36 min |
| Sep 8, 7:16 PM EDT | Special Marine Warning | PHI | 89 min | |
| Sep 8, 7:43 PM EDT | Special Marine Warning | PHI | 57 min | |
| Sep 8, 7:51 PM EDT | Special Weather Statement | PHI | Ocean | 54 min |
| Sep 8, 2:40 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 65 min |
| Sep 8, 2:52 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 53 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2012Severe Thunderstorm Warnings in Pennsylvania, 2012Every severe thunderstorm warning in 2012
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.