Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 69, NWS Philadelphia/Mount Holly

July 18, 2013Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 18, 2013, 7:33 PM EDT for Ocean County, New Jersey. It was in force for 57 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 18, 2013, 7:33 PM EDT (23:33 UTC)
Expired: Jul 18, 2013, 8:30 PM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 25 km from the middle of the area, began a volume at 23:35 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, 11.6 hours before the alert went out and 161 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: 2064 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1211 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

523 
WUUS51 KPHI 182333
SVRPHI
NJC029-190030-
/O.NEW.KPHI.SV.W.0069.130718T2333Z-130719T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
733 PM EDT THU JUL 18 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL OCEAN COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 830 PM EDT

* AT 728 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR BAMBER LAKE...MOVING EAST
  AT 15 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BROOKVILLE AROUND 745 PM EDT...
  BARNEGAT AROUND 800 PM EDT...
  BARNEGAT LIGHT AROUND 825 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3980 7408 3971 7412 3970 7412 3971 7415
      3974 7414 3972 7416 3981 7441 3986 7444
      3994 7439 3992 7411 3986 7412 3982 7415
      3981 7412 3981 7410 3991 7410 3991 7407
TIME...MOT...LOC 2333Z 283DEG 14KT 3987 7434

$$

ROBERTSON

1 follow-up statement

440 
WWUS51 KPHI 190004
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
804 PM EDT THU JUL 18 2013

NJC029-190011-
/O.CAN.KPHI.SV.W.0069.000000T0000Z-130719T0030Z/
OCEAN NJ-
804 PM EDT THU JUL 18 2013

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL OCEAN COUNTY IS
CANCELLED...

THE STORM HAS WEAKENED TO BELOW SEVERE LIMITS...THEREFORE THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 3980 7408 3971 7412 3970 7412 3971 7415
      3974 7414 3972 7416 3981 7441 3986 7444
      3994 7439 3992 7411 3986 7412 3982 7415
      3981 7412 3981 7410 3991 7410 3991 7407
TIME...MOT...LOC 0001Z 283DEG 14KT 3984 7420

$$

ROBERTSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 2:16 AM EDT	Special Weather Statement	PHI	Hunterdon	59 min
Jul 18, 4:31 PM EDT	Special Weather Statement	PHI	Burlington	44 min
Jul 18, 5:01 PM EDT	Special Weather Statement	PHI	Burlington	29 min
Jul 18, 5:03 PM EDT	Special Weather Statement	PHI	Burlington	27 min
Jul 18, 5:40 PM EDT	Special Weather Statement	PHI	Ocean	35 min
Jul 18, 5:41 PM EDT	Special Weather Statement	PHI	Ocean	34 min
Jul 18, 6:13 PM EDT	Special Weather Statement	PHI	Camden	47 min
Jul 18, 6:30 PM EDT	Special Weather Statement	PHI	Ocean	30 min
Jul 18, 6:39 PM EDT	Special Weather Statement	PHI	Burlington	66 min
Jul 18, 6:41 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden	64 min
Jul 18, 6:48 PM EDT	Special Weather Statement	PHI	Ocean	42 min
Jul 18, 6:55 PM EDT	Special Weather Statement	PHI	Camden	50 min
Jul 18, 7:05 PM EDT	Special Weather Statement	PHI	Burlington	40 min
Jul 18, 7:14 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	61 min
Jul 18, 7:17 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	28 min
Jul 18, 7:57 PM EDT	Special Weather Statement	PHI	Burlington	48 min

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.