Alert archive / New Jersey / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 95, NWS Philadelphia/Mount Holly

July 8, 2014Hunterdon County, Mercer County, New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 8, 2014, 4:12 PM EDT for Hunterdon County, Mercer County, New Jersey; Bucks County, Pennsylvania. It was in force for 33 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 8, 2014, 4:12 PM EDT (20:12 UTC)
Expired: Jul 8, 2014, 4:45 PM EDT
In force: 33 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Hunterdon County, NJ, Mercer County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 64 km from the middle of the area, began a volume at 20:12 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.2 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.

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: 132 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 1646 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

010 
WUUS51 KPHI 082012
SVRPHI
NJC019-021-PAC017-082100-
/O.NEW.KPHI.SV.W.0095.140708T2012Z-140708T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
412 PM EDT TUE JUL 8 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
  NORTHWESTERN MERCER COUNTY IN CENTRAL NEW JERSEY...
  CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...

* UNTIL 500 PM EDT

* AT 412 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR DOYLESTOWN...MOVING
  NORTHEAST AT 30 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...
  LUMBERVILLE AND BYRAM AROUND 420 PM EDT...
  NEW HOPE AND STOCKTON AROUND 425 PM EDT...
  WASHINGTON CROSSING AROUND 430 PM EDT...
  SERGEANTSVILLE AND SAND BROOK AROUND 435 PM EDT...
  PENNINGTON AROUND 440 PM EDT...
  HOPEWELL AROUND 450 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.

&&

LAT...LON 4033 7470 4020 7513 4036 7523 4046 7496
      4049 7484
TIME...MOT...LOC 2013Z 245DEG 24KT 4032 7506

$$

FORECASTER:JJM

2 follow-up statements

119 
WWUS51 KPHI 082036
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
436 PM EDT TUE JUL 8 2014

NJC021-PAC017-082046-
/O.CAN.KPHI.SV.W.0095.000000T0000Z-140708T2100Z/
MERCER NJ-BUCKS PA-
436 PM EDT TUE JUL 8 2014

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BUCKS AND NORTHWESTERN
MERCER COUNTIES IS CANCELLED...

LAT...LON 4042 7480 4038 7481 4037 7487 4035 7486
      4035 7493 4040 7496 4046 7496 4049 7484
      4042 7478
TIME...MOT...LOC 2036Z 235DEG 44KT 4043 7482

$$

NJC019-082100-
/O.CON.KPHI.SV.W.0095.000000T0000Z-140708T2100Z/
HUNTERDON NJ-
436 PM EDT TUE JUL 8 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTH CENTRAL HUNTERDON COUNTY...

AT 434 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 SAND BROOK...OR 14
MILES NORTH OF TRENTON...MOVING NORTHEAST AT 30 MPH.

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.

LAT...LON 4042 7480 4038 7481 4037 7487 4035 7486
      4035 7493 4040 7496 4046 7496 4049 7484
      4042 7478
TIME...MOT...LOC 2036Z 235DEG 44KT 4043 7482

$$

JJM

835 
WWUS51 KPHI 082045
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
445 PM EDT TUE JUL 8 2014

NJC019-082054-
/O.CAN.KPHI.SV.W.0095.000000T0000Z-140708T2100Z/
HUNTERDON NJ-
445 PM EDT TUE JUL 8 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL HUNTERDON COUNTY
IS CANCELLED...

THE STORM THAT PROMPTED THE WARNING FOR HUNTERDON COUNTY HAS 
WEAKENED AND IS NO LONGER A THREAT TO THE AREA.  THE WARNING HAS 
THEREFORE BEEN CANCELLED.


LAT...LON 4042 7480 4038 7481 4037 7487 4035 7486
      4035 7493 4040 7496 4046 7496 4049 7484
      4042 7478
TIME...MOT...LOC 2044Z 235DEG 44KT 4049 7471

$$

JJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 10:34 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Jul 7, 10:45 PM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	60 min
Jul 7, 10:57 PM EDT	Areal Flood Advisory	PHI	Warren	3 hr
Jul 8, 3:27 AM EDT	Small Craft Advisory	PHI		29 hr
Jul 7, 9:42 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	63 min
Jul 7, 10:04 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	3 hr
Jul 8, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	24 min
Jul 8, 7:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	82 min
Jul 8, 7:19 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	116 min
Jul 8, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	106 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2014 Severe Thunderstorm Warnings in Pennsylvania, 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.