Alert archive / New Jersey / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 93, NWS Philadelphia/Mount Holly

July 9, 2016Bucks County, Pennsylvania; 4 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 9, 2016, 9:48 PM EDT for Bucks County, Pennsylvania; 4 counties in New Jersey. It was in force for 27 min. 2 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 9, 2016, 9:48 PM EDT (01:48 UTC)
Expired
Jul 9, 2016, 10:15 PM EDT
In force
27 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

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

The radar

The Philadelphia radar (KDIX), 30 km from the middle of the area, began a volume at 01:51 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 9, 9:57 PM EDTTSTM WND DMGTrenton, NJSOME TREES DOWN IN TRENTON. TIME ESTIMATED FROM RADAR.
Jul 9, 10:13 PM EDTTSTM WND DMGAllentown, NJSOME TREE LIMBS DOWN. TIME ESTIMATED FROM RADAR.

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 00:00Z, 1.8 hours before the alert went out and 168 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 00:00Z on 2016-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2016-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
481 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

737 
WUUS51 KPHI 100148
SVRPHI
NJC005-021-023-025-PAC017-100215-
/O.NEW.KPHI.SV.W.0093.160710T0148Z-160710T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
948 PM EDT SAT JUL 9 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY...
  SOUTHWESTERN MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  SOUTHWESTERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  NORTH CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 1015 PM EDT

* AT 948 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER WASHINGTON
  CROSSING...OR NEAR TRENTON...MOVING EAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  TRENTON...MANALAPAN...EWING...PRINCETON...FLORENCE...JAMESBURG...
  HIGHTSTOWN...BORDENTOWN...CRANBURY...PENNINGTON...YARDLEY...
  NEWTOWN...TULLYTOWN...ALLENTOWN...LANGHORNE...ROOSEVELT...
  WRIGHTSTOWN...LEVITTOWN...IMLAYSTOWN AND LAWRENCEVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IN ADDITION TO DAMAGING WINDS...FREQUENT 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 RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
POOR DRAINAGE FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4013 7447 4008 7455 4004 7458 4003 7463
      4022 7500 4034 7497 4035 7433
TIME...MOT...LOC 0148Z 288DEG 38KT 4027 7487 

HAIL...<.75IN
WIND...60MPH
 
$$

JRK
1 follow-up statement
808 
WWUS51 KPHI 100203
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1003 PM EDT SAT JUL 9 2016

NJC005-021-023-025-PAC017-100215-
/O.CON.KPHI.SV.W.0093.000000T0000Z-160710T0215Z/
MERCER NJ-MONMOUTH NJ-MIDDLESEX NJ-BURLINGTON NJ-BUCKS PA-
1003 PM EDT SAT JUL 9 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR MERCER...SOUTHWESTERN MONMOUTH...SOUTHWESTERN MIDDLESEX...NORTH
CENTRAL BURLINGTON AND EASTERN BUCKS COUNTIES...

AT 1003 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER MERCERVILLE-
HAMILTON SQUARE...OR NEAR TRENTON...MOVING EAST AT 45 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
TRENTON...MANALAPAN...EWING...PRINCETON...FLORENCE...JAMESBURG...
HIGHTSTOWN...BORDENTOWN...CRANBURY...PENNINGTON...YARDLEY...
TULLYTOWN...ALLENTOWN...ROOSEVELT...WRIGHTSTOWN...LEVITTOWN...TWIN
RIVERS...FLORENCE-ROEBLING...CLARKSBURG AND CREAM RIDGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IN ADDITION TO DAMAGING WINDS...FREQUENT 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 RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
POOR DRAINAGE FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4016 7488 4034 7481 4035 7433 4013 7447
      4008 7455 4004 7458 4003 7463
TIME...MOT...LOC 0203Z 286DEG 38KT 4023 7468 

HAIL...<.75IN
WIND...60MPH
 
$$

JRK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 8:14 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Lehigh, Montgomery, Northampton46 min
Jul 9, 9:22 PM EDTSpecial Weather StatementPHIBucks38 min
Jul 9, 9:29 PM EDTSevere Thunderstorm WarningPHIBucks46 min
Jul 9, 8:43 PM EDTSpecial Weather StatementPHISussex32 min
Jul 9, 9:00 PM EDTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex, Somerset60 min
Jul 9, 10:10 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Monmouth, Ocean50 min
Jul 9, 10:50 PM EDTSpecial Weather StatementPHIMonmouth25 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2016Severe Thunderstorm Warnings in Pennsylvania, 2016Every severe thunderstorm warning in 2016

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.