Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 144, NWS Philadelphia/Mount Holly

July 6, 20115 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2011, 3:23 PM EDT for 5 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 67 min. 3 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 6, 2011, 3:23 PM EDT (19:23 UTC)
Expired
Jul 6, 2011, 4:30 PM EDT
In force
67 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Burlington County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 31 km from the middle of the area, began a volume at 19:23 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 6, 3:48 PM EDTTSTM WND GST 60Hamilton Twp, NJ
Jul 6, 3:50 PM EDTTSTM WND DMGHamilton Twp, NJNUMEROUS TREES AND WIRES DOWN WITHIN THE TOWNSHIP.
Jul 6, 4:39 PM EDTTSTM WND DMGBordentown, NJLARGE LIMBS DOWN

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.4 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 721 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.19395878Sfc1 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
721 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1270 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
10 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.

972 
WUUS51 KPHI 061923
SVRPHI
NJC005-021-023-025-029-PAC017-062030-
/O.NEW.KPHI.SV.W.0144.110706T1923Z-110706T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
323 PM EDT WED JUL 6 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MERCER COUNTY IN CENTRAL NEW JERSEY...
  THIS INCLUDES THE CITY OF TRENTON...
  SOUTHWESTERN MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  EXTREME SOUTH CENTRAL MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  EXTREME SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  EXTREME NORTH CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN OCEAN COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 430 PM EDT

* AT 319 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING 
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WHITE 
  HORSE...OR NEAR TRENTON...AND MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CROSSWICKS AND EDINBURG AROUND 335 PM EDT...
  ALLENTOWN AND WINDSOR AROUND 345 PM EDT...
  CREAM RIDGE AROUND 355 PM EDT...
  IMLAYSTOWN AND CREAM RIDGE AROUND 400 PM EDT...
  ROOSEVELT AROUND 405 PM EDT...
  CLARKSBURG AROUND 410 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4027 7432 4008 7445 4017 7479 4027 7478
TIME...MOT...LOC 1923Z 277DEG 15KT 4020 7470

$$
 
TFG
1 follow-up statement
949 
WWUS51 KPHI 062013
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
413 PM EDT WED JUL 6 2011

NJC005-021-023-025-029-PAC017-062030-
/O.CON.KPHI.SV.W.0144.000000T0000Z-110706T2030Z/
MERCER NJ-MIDDLESEX NJ-BUCKS PA-MONMOUTH NJ-OCEAN NJ-BURLINGTON NJ-
413 PM EDT WED JUL 6 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR EXTREME NORTH CENTRAL BURLINGTON...EXTREME NORTHWESTERN OCEAN...
SOUTHWESTERN MONMOUTH...EXTREME SOUTHEASTERN BUCKS...EXTREME SOUTH
CENTRAL MIDDLESEX AND SOUTHEASTERN MERCER COUNTIES...

AT 410 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 WHITE HORSE...OR NEAR
TRENTON...MOVING EAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  CROSSWICKS AND EDINBURG BY 420 PM EDT...
  ALLENTOWN AND WINDSOR BY 425 PM EDT...
  IMLAYSTOWN...CREAM RIDGE...6 MILES SOUTHWEST OF ROOSEVELT AND 6
  MILES SOUTHWEST OF HIGHTSTOWN BY 430 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM PRODUCED ESTIMATED WIND GUSTS OF 60 MPH AS IT PASSED
ACROSS INTERSTATE 295 IN HAMILTON TOWNSHIP. DOPPLER RADAR WAS
STILL DETECTING WINDS ALOFT OF AROUND 60 MPH. SEEK SHELTER NOW 
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4027 7439 4009 7449 4017 7479 4027 7478
TIME...MOT...LOC 2012Z 277DEG 15KT 4020 7468

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 12:34 PM EDTSpecial Weather StatementPHIAtlantic56 min
Jul 6, 1:13 PM EDTSpecial Marine WarningPHI92 min
Jul 6, 1:23 PM EDTSevere Thunderstorm WarningPHICumberland, Salem52 min
Jul 6, 1:30 PM EDTSpecial Marine WarningPHI90 min
Jul 6, 1:47 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth58 min
Jul 6, 2:26 PM EDTSevere Thunderstorm WarningPHIBurlington, Monmouth, Ocean46 min
Jul 6, 2:40 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean62 min
Jul 6, 2:57 PM EDTSpecial Marine WarningPHI93 min
Jul 6, 4:02 PM EDTAreal Flood AdvisoryPHIMercer, Middlesex, Monmouth118 min
Jul 6, 4:32 PM EDTSevere Thunderstorm WarningPHIBurlington, Monmouth, Ocean58 min
Jul 6, 5:00 PM EDTAreal Flood AdvisoryPHIBurlington4 hr
Jul 6, 5:18 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean42 min
Jul 6, 5:38 PM EDTSpecial Marine WarningPHI82 min
Jul 6, 6:14 PM EDTSpecial Weather StatementPHIOcean91 min
Jul 6, 7:03 PM EDTFlash Flood WarningPHIBurlington2 hr
Jul 6, 4:01 PM EDTSpecial Weather StatementPHIBucks59 min
Jul 6, 4:46 PM EDTSpecial Weather StatementPHIMontgomery89 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2011Severe Thunderstorm Warnings in Pennsylvania, 2011Every severe thunderstorm warning in 2011

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.