Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly

July 18, 2013Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 18, 2013, 7:17 PM EDT for Ocean County, New Jersey. It was in force for 28 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, 7:17 PM EDT (23:17 UTC)
Expired
Jul 18, 2013, 7:45 PM EDT
In force
28 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 31 km from the middle of the area, began a volume at 23:18 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, 11.3 hours before the alert went out and 165 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2013-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2064 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2013-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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.

685 
WUUS51 KPHI 182317
SVRPHI
NJC029-182345-
/O.NEW.KPHI.SV.W.0068.130718T2317Z-130718T2345Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 745 PM EDT

* AT 714 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR BARNEGAT...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...
  HARVEY CEDARS AND SURF CITY AROUND 725 PM EDT...
  BARNEGAT LIGHT AROUND 730 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 3977 7409 3967 7414 3962 7418 3967 7434
      3983 7427 3981 7416 3975 7418 3972 7415
      3974 7414 3977 7415 3978 7413 3980 7413
      3980 7408 3977 7408
TIME...MOT...LOC 2317Z 285DEG 13KT 3972 7419

$$

ROBERTRSON
1 follow-up statement
452 
WWUS51 KPHI 182338
SVSPHI

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

NJC029-182345-
/O.CON.KPHI.SV.W.0068.000000T0000Z-130718T2345Z/
OCEAN NJ-
738 PM EDT THU JUL 18 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTH CENTRAL OCEAN COUNTY...

AT 735 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR HARVEY CEDARS...OR 17 MILES SOUTH OF TOMS RIVER...MOVING EAST AT
15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHIP 
BOTTOM AND MANAHAWKIN.

A SECOND SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR ANOTHER 
PORTION OF OCEAN COUNTY UNTIL 830 PM.

LAT...LON 3977 7408 3977 7409 3967 7414 3962 7418
      3967 7428 3977 7421 3975 7418 3972 7415
      3974 7414 3977 7415 3978 7413
TIME...MOT...LOC 2337Z 285DEG 13KT 3970 7410

$$

ROBERTRSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 2:16 AM EDTSpecial Weather StatementPHIHunterdon59 min
Jul 18, 4:31 PM EDTSpecial Weather StatementPHIBurlington44 min
Jul 18, 5:01 PM EDTSpecial Weather StatementPHIBurlington29 min
Jul 18, 5:03 PM EDTSpecial Weather StatementPHIBurlington27 min
Jul 18, 5:40 PM EDTSpecial Weather StatementPHIOcean35 min
Jul 18, 5:41 PM EDTSpecial Weather StatementPHIOcean34 min
Jul 18, 6:13 PM EDTSpecial Weather StatementPHICamden47 min
Jul 18, 6:30 PM EDTSpecial Weather StatementPHIOcean30 min
Jul 18, 6:39 PM EDTSpecial Weather StatementPHIBurlington66 min
Jul 18, 6:41 PM EDTAreal Flood AdvisoryPHIBurlington, Camden64 min
Jul 18, 6:48 PM EDTSpecial Weather StatementPHIOcean42 min
Jul 18, 6:55 PM EDTSpecial Weather StatementPHICamden50 min
Jul 18, 7:05 PM EDTSpecial Weather StatementPHIBurlington40 min
Jul 18, 7:14 PM EDTAreal Flood AdvisoryPHIBurlington, Ocean61 min
Jul 18, 7:33 PM EDTSevere Thunderstorm WarningPHIOcean57 min
Jul 18, 7:57 PM EDTSpecial Weather StatementPHIBurlington48 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.