Alert archive / New Jersey / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 65, NWS Philadelphia/Mount Holly

July 2, 20144 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2014, 6:31 PM EDT for 4 counties in New Jersey. It was in force for 42 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 2, 2014, 6:31 PM EDT (22:31 UTC)
Expired: Jul 2, 2014, 7:13 PM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Hunterdon County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 22:34 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
Jul 2, 1:22 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.5 hours before the alert went out and 150 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1089 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 836 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

149 
WUUS51 KPHI 022231
SVRPHI
NJC019-023-027-035-022330-
/O.NEW.KPHI.SV.W.0065.140702T2231Z-140702T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
631 PM EDT WED JUL 2 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
  SOUTH CENTRAL MORRIS COUNTY IN NORTHERN NEW JERSEY...
  SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  NORTH CENTRAL MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 730 PM EDT

* AT 629 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR FLEMINGTON...MOVING
  NORTHEAST 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...
  FLEMINGTON AROUND 635 PM EDT...
  CLOVERHILL AROUND 645 PM EDT...
  FLAGTOWN AND WHITE HOUSE STATION AROUND 700 PM EDT...
  BRIDGEWATER AND MILLSTONE AROUND 715 PM EDT...
  SOMERVILLE AND MANVILLE AROUND 720 PM EDT...
  MARTINSVILLE AND BOUND BROOK AROUND 730 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 700 PM EDT
WEDNESDAY EVENING FOR EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM EDT WEDNESDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEAST
PENNSYLVANIA.

&&

LAT...LON 4042 7475 4042 7480 4040 7480 4037 7493
      4053 7503 4079 7448 4070 7442 4067 7445
      4067 7441 4066 7440 4060 7444 4061 7437
      4054 7432
TIME...MOT...LOC 2230Z 244DEG 16KT 4049 7488

$$

FORECASTER:
SFJ

2 follow-up statements

260 
WWUS51 KPHI 022245
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
645 PM EDT WED JUL 2 2014

NJC019-023-027-035-022330-
/O.CON.KPHI.SV.W.0065.000000T0000Z-140702T2330Z/
HUNTERDON NJ-MORRIS NJ-SOMERSET NJ-MIDDLESEX NJ-
645 PM EDT WED JUL 2 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTH CENTRAL MIDDLESEX...SOMERSET...SOUTH CENTRAL MORRIS AND
SOUTHERN HUNTERDON COUNTIES...

AT 642 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 FLEMINGTON...OR 12
MILES WEST OF SOMERVILLE...MOVING NORTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WHITE HOUSE STATION BY 700 PM EDT...
  FLAGTOWN BY 705 PM EDT...
  RARITAN AND BRIDGEWATER BY 715 PM EDT...
  SOMERVILLE AND MANVILLE BY 720 PM EDT...
  MARTINSVILLE AND BOUND BROOK BY 730 PM EDT...

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 700 PM EDT
WEDNESDAY EVENING FOR EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM EDT WEDNESDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND SOUTHEAST
PENNSYLVANIA.

LAT...LON 4042 7475 4042 7480 4040 7480 4037 7493
      4053 7503 4079 7448 4070 7442 4067 7445
      4067 7441 4066 7440 4060 7444 4061 7437
      4054 7432
TIME...MOT...LOC 2245Z 244DEG 16KT 4052 7480

$$

SFJ

614 
WWUS51 KPHI 022313
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
713 PM EDT WED JUL 2 2014

NJC019-023-027-035-022322-
/O.CAN.KPHI.SV.W.0065.000000T0000Z-140702T2330Z/
HUNTERDON NJ-MORRIS NJ-SOMERSET NJ-MIDDLESEX NJ-
713 PM EDT WED JUL 2 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MIDDLESEX...
SOMERSET...SOUTH CENTRAL MORRIS AND SOUTHERN HUNTERDON COUNTIES IS
CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAD WEAKENED. THUS THE WARNING 
WAS CANCELLED. HOWEVER...GUSTS TO 40 MPH ARE STILL POSSIBLE WITH 
THESE STORMS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEAST PENNSYLVANIA.

LAT...LON 4042 7475 4042 7480 4040 7480 4037 7493
      4053 7503 4079 7448 4070 7442 4067 7445
      4067 7441 4066 7440 4060 7444 4061 7437
      4054 7432
TIME...MOT...LOC 2312Z 244DEG 16KT 4057 7466

$$

SFJ

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 2, 3:59 AM EDT	Small Craft Advisory	PHI		18 hr
Jul 2, 2:48 PM EDT	Special Weather Statement	PHI	Sussex	42 min
Jul 2, 3:30 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	60 min
Jul 2, 3:36 PM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	46 hr
Jul 2, 3:58 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Jul 2, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	57 min
Jul 2, 4:34 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Jul 2, 5:01 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	3 hr
Jul 2, 5:08 PM EDT	Special Weather Statement	PHI	Hunterdon	52 min
Jul 2, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	67 min
Jul 2, 5:42 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	3 hr
Jul 2, 5:56 PM EDT	Special Weather Statement	PHI	Warren	49 min
Jul 2, 6:06 PM EDT	Special Weather Statement	PHI	Somerset	24 min
Jul 2, 6:13 PM EDT	Flash Flood Warning	PHI	Hunterdon	4 hr
Jul 2, 7:09 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Somerset	4 hr
Jul 2, 7:15 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Somerset	4 hr
Jul 2, 7:16 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	59 min
Jul 2, 7:35 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer	55 min
Jul 2, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	27 min
Jul 2, 7:52 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	4 hr
Jul 2, 7:58 PM EDT	Special Marine Warning	PHI		62 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2014 Every 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.