Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 72, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 20, 2013, 6:41 PM EDT for Middlesex County, Somerset County, New Jersey. It was in force for 64 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
- Jul 20, 2013, 6:41 PM EDT (22:41 UTC)
- Expired
- Jul 20, 2013, 7:45 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Middlesex County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 22:41 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, 10.7 hours before the alert went out and 129 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
- 1324 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1201 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
729
WUUS51 KPHI 202241
SVRPHI
NJC023-035-202345-
/O.NEW.KPHI.SV.W.0072.130720T2241Z-130720T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
641 PM EDT SAT JUL 20 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL SOMERSET COUNTY IN NORTHERN NEW JERSEY...
NORTHEASTERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 745 PM EDT
* AT 637 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THE STORM WAS NEAR SOMERVILLE...MOVING EAST AT
25 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
MIDDLESEX AROUND 650 PM EDT...
SOCIETY HILL AROUND 655 PM EDT...
EDISON AROUND 705 PM EDT...
COLONIA AROUND 710 PM EDT...
PERTH AMBOY AROUND 715 PM EDT...
CARTERET AROUND 720 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 4056 7421 4055 7424 4049 7426 4052 7469
4065 7468 4066 7440 4062 7442 4060 7444
4061 7431 4060 7429 4061 7421 4059 7420
TIME...MOT...LOC 2241Z 273DEG 23KT 4058 7456
$$
FORECASTER: HEAVENER2 follow-up statements
025
WWUS51 KPHI 202304
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
704 PM EDT SAT JUL 20 2013
NJC035-202314-
/O.CAN.KPHI.SV.W.0072.000000T0000Z-130720T2345Z/
SOMERSET NJ-
704 PM EDT SAT JUL 20 2013
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SOMERSET COUNTY IS
CANCELLED...
THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.
LAT...LON 4056 7421 4055 7424 4049 7426 4050 7447
4056 7453 4058 7452 4060 7446 4061 7431
4060 7429 4061 7422 4059 7420
TIME...MOT...LOC 2304Z 273DEG 23KT 4057 7437
$$
NJC023-202345-
/O.CON.KPHI.SV.W.0072.000000T0000Z-130720T2345Z/
MIDDLESEX NJ-
704 PM EDT SAT JUL 20 2013
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR NORTHEASTERN MIDDLESEX COUNTY...
AT 700 PM 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 SOUTH PLAINFIELD...OR
NEAR PLAINFIELD...MOVING EAST AT 25 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
ISELIN AND COLONIA AROUND 710 PM EDT...
WOODBRIDGE AND AVENEL AROUND 715 PM EDT...
PORT READING AND CARTERET AROUND 720 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.
&&
LAT...LON 4056 7421 4055 7424 4049 7426 4050 7447
4056 7453 4058 7452 4060 7446 4061 7431
4060 7429 4061 7422 4059 7420
TIME...MOT...LOC 2304Z 273DEG 23KT 4057 7437
$$
FORECASTER: HEAVENER070
WWUS51 KPHI 202321
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
721 PM EDT SAT JUL 20 2013
NJC023-202331-
/O.CAN.KPHI.SV.W.0072.000000T0000Z-130720T2345Z/
MIDDLESEX NJ-
721 PM EDT SAT JUL 20 2013
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIDDLESEX COUNTY
IS CANCELLED...
THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.
LAT...LON 4056 7421 4055 7424 4049 7426 4050 7447
4056 7453 4058 7452 4060 7446 4061 7431
4060 7429 4061 7422 4059 7420
TIME...MOT...LOC 2321Z 273DEG 23KT 4056 7423
$$
FORECASTER: HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 8:05 PM EDT | Special Weather Statement | PHI | Hunterdon | 25 min |
| Jul 19, 8:26 PM EDT | Special Weather Statement | PHI | Hunterdon | 34 min |
| Jul 19, 8:58 PM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 32 min |
| Jul 19, 9:24 PM EDT | Special Weather Statement | PHI | Somerset | 36 min |
| Jul 20, 4:18 PM EDT | Special Weather Statement | PHI | Morris | 57 min |
| Jul 20, 5:47 PM EDT | Special Weather Statement | PHI | Monmouth | 58 min |
| Jul 20, 6:36 PM EDT | Special Weather Statement | PHI | Somerset | 39 min |
| Jul 20, 6:57 PM EDT | Special Weather Statement | PHI | Hunterdon | 63 min |
| Jul 20, 7:16 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 59 min |
| Jul 20, 7:54 PM EDT | Special Weather Statement | PHI | Salem | 66 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.