Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 62, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2013, 8:39 AM EDT for Middlesex County, Morris County, Somerset County, New Jersey. It was in force for 66 min. 4 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
- Jul 1, 2013, 8:39 AM EDT (12:39 UTC)
- Expired
- Jul 1, 2013, 9:45 AM EDT
- In force
- 66 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Middlesex County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 12:42 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 |
|---|---|---|---|
| Jul 1, 8:39 AM EDT | TSTM WND DMG | Branchburg Twp, NJ | TREES AND WIRES DOWN IN BRANCHBURG TWP. ALSO LOCALIZED STREET FLOODING REPORTED. |
| Jul 1, 8:47 AM EDT | TSTM WND DMG | Bridgewater Twp, NJ | TREE LIMBS DOWN IN BRIDGEWATER TWP. |
| Jul 1, 8:48 AM EDT | TSTM WND DMG | Bridgewater Twp, NJ | TREES 2 IN DIAMETER AS WELL AS WIRES DOWN ON FOOTHILL ROAD |
| Jul 1, 8:50 AM EDT | TSTM WND DMG | Bridgewater Twp, NJ | LARGE TREES AND POWER LINES DOWN THROUGHOUT BRIDGEWATER TWP CAUSING ROAD CLOSURES... INCLUDING OLD YORK ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 0.7 hours before the alert went out and 141 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
- 687 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 438 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
566
WUUS51 KPHI 011239
SVRPHI
NJC023-027-035-011345-
/O.NEW.KPHI.SV.W.0062.130701T1239Z-130701T1345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
839 AM EDT MON JUL 1 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL MORRIS COUNTY IN NORTHERN NEW JERSEY...
CENTRAL SOMERSET COUNTY IN NORTHERN NEW JERSEY...
NORTHEASTERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 945 AM EDT
* AT 838 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THE STORM WAS NEAR FLAGTOWN...MOVING NORTHEAST
AT 35 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SOMERVILLE AND BRIDGEWATER AROUND 850 AM EDT...
MARTINSVILLE AND BOUND BROOK AROUND 855 AM EDT...
MIDDLESEX AND SOCIETY HILL AROUND 900 AM EDT...
MILLINGTON AROUND 905 AM EDT...
COLONIA AROUND 915 AM EDT...
CHATHAM AROUND 920 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DOPPLER RADAR HAS INDICATED SOME ROTATION WITHIN THIS STORM. 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 ON THE LOWEST
FLOOR.
VERY HEAVY RAIN WILL ALSO OCCUR WITH THIS SEVERE THUNDERSTORM...WHICH
COULD FLOOD LOW LYING AREAS QUICKLY AND COVER ROADS WITH WATER. DO
NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4043 7475 4051 7478 4057 7472 4060 7472
4078 7437 4073 7437 4067 7445 4067 7440
4062 7442 4060 7444 4061 7431 4060 7429
4060 7421
TIME...MOT...LOC 1239Z 243DEG 29KT 4054 7472
$$
FORECASTER:PO
!2 follow-up statements
644
WWUS51 KPHI 011303
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
903 AM EDT MON JUL 1 2013
NJC023-027-035-011345-
/O.CON.KPHI.SV.W.0062.000000T0000Z-130701T1345Z/
MORRIS NJ-SOMERSET NJ-MIDDLESEX NJ-
903 AM EDT MON JUL 1 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM EDT
FOR NORTHEASTERN MIDDLESEX...EAST CENTRAL SOMERSET AND SOUTH CENTRAL
MORRIS COUNTIES...
AT 901 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MARTINSVILLE...OR NEAR
SOMERVILLE...MOVING NORTHEAST AT 30 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
NORTH PLAINFIELD AND MILLINGTON AROUND 910 AM EDT...
WATCHUNG AROUND 915 AM EDT...
COLONIA AND ISELIN AROUND 920 AM EDT...
CHATHAM AND AVENEL AROUND 925 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE FOR DAMAGING WINDS...
DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE
OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG
BUILDING...AWAY FROM WINDOWS OR EVEN BELOW GROUND LEVEL.
&&
LAT...LON 4051 7450 4058 7455 4061 7458 4065 7461
4078 7437 4073 7437 4067 7445 4067 7440
4062 7442 4060 7444 4061 7431 4060 7429
4060 7421
TIME...MOT...LOC 1303Z 246DEG 27KT 4063 7454
$$
FORECASTER:PO632
WWUS51 KPHI 011324
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
924 AM EDT MON JUL 1 2013
NJC023-035-011334-
/O.CAN.KPHI.SV.W.0062.000000T0000Z-130701T1345Z/
SOMERSET NJ-MIDDLESEX NJ-
924 AM EDT MON JUL 1 2013
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIDDLESEX AND
EAST CENTRAL SOMERSET COUNTIES 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 4068 7444 4067 7445 4067 7446 4067 7448
4065 7452 4067 7453 4070 7451 4078 7437
4073 7437
TIME...MOT...LOC 1324Z 246DEG 27KT 4069 7435
$$
NJC027-011345-
/O.CON.KPHI.SV.W.0062.000000T0000Z-130701T1345Z/
MORRIS NJ-
924 AM EDT MON JUL 1 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM EDT
FOR SOUTH CENTRAL MORRIS COUNTY...
AT 922 AM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR CHATHAM...OR NEAR SUMMIT...MOVING NORTHEAST AT 30 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. WHILE NOT
IMMEDIATELY LIKELY...A TORNADO MAY DEVELOP. IF A TORNADO IS
SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
&&
LAT...LON 4068 7444 4067 7445 4067 7446 4067 7448
4065 7452 4067 7453 4070 7451 4078 7437
4073 7437
TIME...MOT...LOC 1324Z 246DEG 27KT 4069 7435
$$
FORECASTER:POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 4:07 AM EDT | Special Weather Statement | PHI | Sussex | 38 min |
| Jul 1, 5:37 AM EDT | Flash Flood Warning | PHI | Warren | 6 hr |
| Jul 1, 6:49 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Sussex, Warren | 4 hr |
| Jul 1, 7:09 AM EDT | Areal Flood Advisory | PHI | Cumberland, Salem | 4 hr |
| Jul 1, 7:47 AM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 58 min |
| Jul 1, 8:03 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset | 4 hr |
| Jul 1, 8:07 AM EDT | Flash Flood Warning | PHI | Hunterdon | 4 hr |
| Jul 1, 8:25 AM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| Jul 1, 8:55 AM EDT | Flash Flood Warning | PHI | Morris, Somerset, Sussex, Warren | 4 hr |
| Jul 1, 10:30 AM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 5 hr |
| Jul 1, 10:52 AM EDT | Areal Flood Warning | PHI | Hunterdon, Morris, Somerset | 13 hr |
| Jul 1, 12:05 PM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 4 hr |
| Jul 1, 12:28 PM EDT | River Flood Warning | PHI | Burlington | 40 hr |
| Jul 1, 12:36 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 4 hr |
| Jul 1, 2:14 PM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 4 hr |
| Jul 1, 5:38 PM EDT | River Flood Warning | PHI | Somerset | 4 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.