Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 112, NWS Philadelphia/Mount Holly

July 23, 2012Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2012, 12:32 PM EDT for Sussex County, New Jersey. It was in force for 73 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 23, 2012, 12:32 PM EDT (16:32 UTC)
Expired
Jul 23, 2012, 1:45 PM EDT
In force
73 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 146 km from the middle of the area, began a volume at 16:35 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.

What was reported inside it

TimeReportWhereRemark
Jul 23, 12:37 PM EDTHAIL 1Hainesville, NJ
Jul 23, 1:30 PM EDTTSTM WND DMGSandyston Twp, NJA FEW TREES DOWN.
Jul 23, 1:33 PM EDTHAIL 1.25Sandyston Twp, NJ
Jul 23, 1:45 PM EDTHAIL 0.88Branchville, NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 4.5 hours before the alert went out and 157 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 2012-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 253 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2012-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
253 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
903 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
69 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.

495 
WUUS51 KPHI 231632
SVRPHI
NJC037-231745-
/O.NEW.KPHI.SV.W.0112.120723T1632Z-120723T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1232 PM EDT MON JUL 23 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  THIS INCLUDES THE CITY OF MONTAGUE...

* UNTIL 145 PM EDT

* AT 1230 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING SEVERE THUNDERSTORM CAPABLE OF SOON PRODUCING QUARTER 
  SIZE HAIL...AND   DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS 
  STORM WAS LOCATED NEAR HAINESVILLE...OR NEAR MONTAGUE...AND 
  MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MONTAGUE AROUND 1240 PM EDT...
  HIGH POINT AROUND 105 PM EDT...
  SUSSEX AROUND 120 PM EDT...
  8 MILES NORTH OF HAMBURG AROUND 125 PM EDT...
  VERNON VALLEY AROUND 140 PM EDT...
  6 MILES NORTH OF HIGHLAND LAKE AROUND 145 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 4122 7439 4117 7440 4106 7453 4120 7488
      4124 7487 4129 7484 4131 7480 4132 7480
      4134 7476 4135 7468
TIME...MOT...LOC 1632Z 271DEG 17KT 4127 7482

$$
 
TFG
1 follow-up statement
430 
WWUS51 KPHI 231655
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1255 PM EDT MON JUL 23 2012

NJC037-231745-
/O.CON.KPHI.SV.W.0112.000000T0000Z-120723T1745Z/
SUSSEX NJ-
1255 PM EDT MON JUL 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM EDT
FOR NORTHERN SUSSEX COUNTY...

AT 1248 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 HAINESVILLE...OR NEAR MONTAGUE...MOVING SOUTHEAST AT 10
MPH. BECAUSE OF THE SOUTHWARD MOVEMENT, IT MAY BECOME NECESSARY TO 
ISSUE A NEW WARNING FOR THE SOUTHERN PART OF THE COUNTY.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SUSSEX BY 140 PM EDT...
  FRANKLIN AND HAMBURG BY 145 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

TORRENTIAL RAIN IS ALSO OCCURRING WITH THIS STORM. 

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 4122 7439 4117 7440 4106 7453 4120 7488
      4124 7487 4129 7484 4131 7480 4132 7480
      4134 7476 4135 7468
TIME...MOT...LOC 1653Z 307DEG 10KT 4122 7481

$$
 
TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 11:26 AM EDTSpecial Weather StatementPHISussex94 min
Jul 23, 12:19 PM EDTSpecial Weather StatementPHISussex56 min
Jul 23, 1:00 PM EDTSevere Thunderstorm WarningPHISussex60 min
Jul 23, 1:11 PM EDTFlash Flood WarningPHISussex3 hr
Jul 23, 1:57 PM EDTSevere Thunderstorm WarningPHISussex78 min
Jul 23, 2:24 PM EDTSpecial Weather StatementPHIWarren66 min
Jul 23, 2:44 PM EDTSevere Thunderstorm WarningPHIMorris, Warren76 min
Jul 23, 2:47 PM EDTFlash Flood WarningPHIMorris, Sussex, Warren3 hr
Jul 23, 3:42 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset78 min
Jul 23, 4:56 PM EDTSpecial Weather StatementPHIMiddlesex, Monmouth, Somerset94 min
Jul 23, 5:56 PM EDTSpecial Weather StatementPHIBurlington, Camden, Hunterdon, Mercer64 min
Jul 23, 6:35 PM EDTSpecial Weather StatementPHIMorris, Sussex85 min
Jul 23, 6:51 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Sussex, Warren69 min
Jul 23, 7:39 PM EDTFlash Flood WarningPHISussex, Warren2 hr
Jul 23, 7:56 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren59 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2012Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.