Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 76, NWS Philadelphia/Mount Holly

July 20, 2013Atlantic County, Burlington County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 20, 2013, 9:51 PM EDT for Atlantic County, Burlington County, Ocean County, New Jersey. It was in force for 54 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, 9:51 PM EDT (01:51 UTC)
Expired: Jul 20, 2013, 10:45 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Atlantic County, NJ, Burlington County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 36 km from the middle of the area, began a volume at 01:55 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 00:00Z, 1.9 hours before the alert went out and 182 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: 1732 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1353 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

097 
WUUS51 KPHI 210151
SVRPHI
NJC001-005-029-210245-
/O.NEW.KPHI.SV.W.0076.130721T0151Z-130721T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
951 PM EDT SAT JUL 20 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  NORTH CENTRAL ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHERN OCEAN COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 1045 PM EDT

* AT 946 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR BATSTO...MOVING EAST AT 20
  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...
  PENN STATE FOREST AROUND 1000 PM EDT...
  NEW GRETNA AROUND 1005 PM EDT...
  BASS RIVER STATE FOREST AROUND 1010 PM EDT...
  WARREN GROVE AROUND 1015 PM EDT...
  TUCKERTON AROUND 1020 PM EDT...
  BEACH HAVEN AND BEACH HAVEN WEST AROUND 1035 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.

&&

LAT...LON 3967 7414 3960 7421 3956 7422 3952 7427
      3953 7435 3954 7435 3953 7438 3957 7467
      3975 7465 3975 7418 3972 7415 3975 7415
      3975 7410
TIME...MOT...LOC 0151Z 278DEG 19KT 3965 7454

$$

FORECASTER: HEAVENER

1 follow-up statement

730 
WWUS51 KPHI 210238
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1038 PM EDT SAT JUL 20 2013

NJC001-210248-
/O.CAN.KPHI.SV.W.0076.000000T0000Z-130721T0245Z/
ATLANTIC NJ-
1038 PM EDT SAT JUL 20 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ATLANTIC 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 3967 7414 3960 7421 3959 7421 3963 7452
      3975 7449 3975 7418 3972 7415 3975 7415
      3975 7410
TIME...MOT...LOC 0238Z 278DEG 19KT 3962 7422

$$

NJC005-029-210245-
/O.CON.KPHI.SV.W.0076.000000T0000Z-130721T0245Z/
BURLINGTON NJ-OCEAN NJ-
1038 PM EDT SAT JUL 20 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR SOUTHERN OCEAN AND SOUTHEASTERN BURLINGTON COUNTIES...

AT 1033 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 NORTH BEACH HAVEN...OR 20 MILES NORTHEAST OF ATLANTIC CITY...
MOVING EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
SHIP BOTTOM AND SURF CITY AROUND 1045 PM EDT...

LAT...LON 3967 7414 3960 7421 3959 7421 3963 7452
      3975 7449 3975 7418 3972 7415 3975 7415
      3975 7410
TIME...MOT...LOC 0238Z 278DEG 19KT 3962 7422

$$

FORECASTER: HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 8:33 PM EDT	Special Weather Statement	PHI	Camden	57 min
Jul 20, 8:39 PM EDT	Special Weather Statement	PHI	Camden	66 min
Jul 20, 8:49 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	56 min
Jul 20, 9:13 PM EDT	Special Weather Statement	PHI	Ocean	32 min
Jul 20, 9:38 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	67 min
Jul 20, 9:59 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	61 min
Jul 20, 10:07 PM EDT	Special Marine Warning	PHI		83 min
Jul 20, 10:46 PM EDT	Special Weather Statement	PHI	Burlington	59 min
Jul 20, 10:52 PM EDT	Special Weather Statement	PHI	Atlantic	53 min
Jul 20, 11:10 PM EDT	Special Marine Warning	PHI		95 min
Jul 21, 3:10 PM EDT	Special Weather Statement	PHI	Ocean	65 min
Jul 21, 3:17 PM EDT	Coastal Flood Advisory	PHI	Middlesex, Monmouth, Ocean	6 hr
Jul 21, 3:44 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	2 hr
Jul 21, 4:16 PM EDT	Special Weather Statement	PHI	Burlington	89 min
Jul 21, 4:20 PM EDT	Areal Flood Advisory	PHI	Burlington	3 hr
Jul 21, 4:44 PM EDT	Special Weather Statement	PHI	Burlington	61 min
Jul 21, 5:03 PM EDT	Areal Flood Advisory	PHI	Burlington	3 hr
Jul 21, 5:18 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	57 min
Jul 21, 5:28 PM EDT	Areal Flood Advisory	PHI	Burlington	3 hr
Jul 21, 5:52 PM EDT	Special Weather Statement	PHI	Ocean	53 min
Jul 21, 6:20 PM EDT	Special Weather Statement	PHI	Atlantic	55 min
Jul 21, 6:33 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	3 hr
Jul 21, 7:02 PM EDT	Special Weather Statement	PHI	Atlantic	88 min
Jul 21, 7:04 PM EDT	Special Marine Warning	PHI		56 min
Jul 21, 7:25 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington	3 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2013 Every 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.