Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 103, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 12, 2013, 11:35 AM EDT for Hunterdon County, Morris County, Somerset County, New Jersey. It was in force for 55 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 12, 2013, 11:35 AM EDT (15:35 UTC)
- Expired
- Sep 12, 2013, 12:30 PM EDT
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 15:37 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, 3.6 hours before the alert went out and 134 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
- 1195 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 836 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
518
WUUS51 KPHI 121535
SVRPHI
NJC019-027-035-121630-
/O.NEW.KPHI.SV.W.0103.130912T1535Z-130912T1630Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1135 AM EDT THU SEP 12 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
SOUTHERN MORRIS COUNTY IN NORTHERN NEW JERSEY...
NORTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 1230 PM EDT
* AT 1133 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THE STORM WAS NEAR WHITE HOUSE STATION...
MOVING EAST AT 25 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH
DIAMETER HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SOMERVILLE AROUND 1145 AM EDT...
FAR HILLS AND MARTINSVILLE AROUND 1150 AM EDT...
MENDHAM AROUND 1155 AM EDT...
MILLINGTON AND BASKING RIDGE AROUND NOON EDT...
MORRISTOWN AROUND 1210 PM EDT...
MADISON AROUND 1215 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS SEVERE
THUNDERSTORM. WHEN THUNDER ROARS...MOVE INDOORS! REMEMBER...IF YOU
CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.
&&
LAT...LON 4082 7433 4079 7436 4074 7436 4068 7445
4066 7445 4067 7440 4062 7442 4059 7449
4053 7476 4071 7481 4087 7434 4084 7432
TIME...MOT...LOC 1536Z 250DEG 22KT 4063 7471
$$
FORECASTER: HEAVENER3 follow-up statements
250
WWUS51 KPHI 121556
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1156 AM EDT THU SEP 12 2013
NJC019-121606-
/O.CAN.KPHI.SV.W.0103.000000T0000Z-130912T1630Z/
HUNTERDON NJ-
1156 AM EDT THU SEP 12 2013
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HUNTERDON COUNTY
IS CANCELLED...
THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.
LAT...LON 4082 7433 4079 7436 4074 7436 4068 7445
4066 7445 4067 7440 4062 7442 4059 7449
4057 7469 4074 7470 4087 7434 4084 7432
TIME...MOT...LOC 1556Z 250DEG 22KT 4067 7456
$$
NJC027-035-121630-
/O.CON.KPHI.SV.W.0103.000000T0000Z-130912T1630Z/
MORRIS NJ-SOMERSET NJ-
1156 AM EDT THU SEP 12 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT
FOR NORTHERN SOMERSET AND SOUTHERN MORRIS COUNTIES...
AT 1152 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR FAR HILLS...OR 7 MILES NORTH OF SOMERVILLE...MOVING EAST AT 25
MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
NORTH PLAINFIELD AROUND 1205 PM EDT...
WATCHUNG AND MORRISTOWN AROUND 1210 PM EDT...
MADISON AROUND 1215 PM EDT...
CHATHAM AND FLORHAM PARK AROUND 1220 PM EDT...
EAST HANOVER AROUND 1225 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 4082 7433 4079 7436 4074 7436 4068 7445
4066 7445 4067 7440 4062 7442 4059 7449
4057 7469 4074 7470 4087 7434 4084 7432
TIME...MOT...LOC 1556Z 250DEG 22KT 4067 7456
$$
FORECASTER: HEAVENER304
WWUS51 KPHI 121610
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1210 PM EDT THU SEP 12 2013
NJC027-035-121630-
/O.CON.KPHI.SV.W.0103.000000T0000Z-130912T1630Z/
MORRIS NJ-SOMERSET NJ-
1210 PM EDT THU SEP 12 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT
FOR NORTHEASTERN SOMERSET AND SOUTHERN MORRIS COUNTIES...
AT 1208 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR MILLINGTON...OR 6 MILES WEST OF SUMMIT...MOVING EAST AT 25 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
CHATHAM AND MADISON AROUND 1220 PM EDT...
EAST HANOVER AROUND 1225 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.
&&
LAT...LON 4082 7433 4079 7436 4074 7436 4068 7445
4066 7445 4067 7440 4065 7441 4063 7453
4072 7455 4078 7459 4087 7434 4084 7432
TIME...MOT...LOC 1611Z 250DEG 22KT 4070 7445
$$
FORECASTER: HEAVENER843
WWUS51 KPHI 121623
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1223 PM EDT THU SEP 12 2013
NJC035-121633-
/O.CAN.KPHI.SV.W.0103.000000T0000Z-130912T1630Z/
SOMERSET NJ-
1223 PM EDT THU SEP 12 2013
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SOMERSET COUNTY
IS CANCELLED...
THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.
LAT...LON 4082 7433 4079 7436 4074 7436 4071 7440
4071 7447 4074 7445 4082 7449 4087 7434
4084 7432
TIME...MOT...LOC 1623Z 250DEG 22KT 4072 7436
$$
NJC027-121630-
/O.CON.KPHI.SV.W.0103.000000T0000Z-130912T1630Z/
MORRIS NJ-
1223 PM EDT THU SEP 12 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT
FOR SOUTHEASTERN MORRIS COUNTY...
AT 1220 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR CHATHAM...OR NEAR SUMMIT...MOVING EAST AT 25 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
EAST HANOVER AROUND 1230 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.
&&
LAT...LON 4082 7433 4079 7436 4074 7436 4071 7440
4071 7447 4074 7445 4082 7449 4087 7434
4084 7432
TIME...MOT...LOC 1623Z 250DEG 22KT 4072 7436
$$
FORECASTER: HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 6:43 AM EDT | Special Weather Statement | PHI | Hunterdon | 62 min |
| Sep 12, 7:38 AM EDT | Areal Flood Advisory | PHI | Hunterdon | 3 hr |
| Sep 12, 8:16 AM EDT | Flash Flood Warning | PHI | Hunterdon | 3 hr |
| Sep 12, 11:15 AM EDT | Special Weather Statement | PHI | Hunterdon, Morris, Somerset | 60 min |
| Sep 12, 1:19 PM EDT | Special Weather Statement | PHI | Monmouth | 56 min |
| Sep 12, 3:13 PM EDT | Special Weather Statement | PHI | Monmouth | 62 min |
| Sep 12, 5:38 PM EDT | Small Craft Advisory | PHI | 7 hr | |
| Sep 12, 6:00 PM EDT | Special Weather Statement | PHI | Morris, Sussex, Warren | 90 min |
| Sep 12, 6:07 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Sussex, Warren | 68 min |
| Sep 12, 6:35 PM EDT | Special Weather Statement | PHI | Middlesex | 55 min |
| Sep 12, 6:43 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Somerset | 62 min |
| Sep 12, 7:28 PM EDT | Special Weather Statement | PHI | Burlington, Middlesex, Monmouth | 62 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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.