Alert archive / New Jersey / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 109, NWS Philadelphia/Mount Holly

July 9, 2014Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 9, 2014, 3:28 PM EDT for Sussex County, New Jersey. It was in force for 49 min. 1 report 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, 2014, 3:28 PM EDT (19:28 UTC)
Expired
Jul 9, 2014, 4:17 PM EDT
In force
49 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 135 km from the middle of the area, began a volume at 19:31 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, 3:35 PM EDTTSTM WND DMGStillwater Twp, NJCOUPLE OF TREES DOWN IN STILLWATER TWP.

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, 7.5 hours before the alert went out and 156 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 2014-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 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 2014-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
5 J/kg
Mixed-layer CIN
-207 J/kg
Mixed-layer LCL
1145 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
59 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.

525 
WUUS51 KPHI 091928
SVRPHI
NJC037-092030-
/O.NEW.KPHI.SV.W.0109.140709T1928Z-140709T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
328 PM EDT WED JUL 9 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL SUSSEX COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 430 PM EDT

* AT 325 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING SEVERE THUNDERSTORM. THE STORM WAS NEAR FLATBROOKVILLE...
  MOVING EAST AT 40 MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER
  SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FIVE POINTS AND CRANDON LAKES AROUND 335 PM EDT...
  BRANCHVILLE AND NEWTON AROUND 340 PM EDT...
  PELLETTOWN AROUND 350 PM EDT...
  FRANKLIN AND HAMBURG AROUND 355 PM EDT...
  HIGHLAND LAKE AROUND 405 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

&&

LAT...LON 4121 7437 4104 7456 4104 7491 4109 7496
      4112 7497 4117 7490 4125 7444
TIME...MOT...LOC 1928Z 263DEG 35KT 4109 7492

$$

TFG
2 follow-up statements
461 
WWUS51 KPHI 092000
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
400 PM EDT WED JUL 9 2014

NJC037-092030-
/O.CON.KPHI.SV.W.0109.000000T0000Z-140709T2030Z/
SUSSEX NJ-
400 PM EDT WED JUL 9 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR EAST CENTRAL SUSSEX COUNTY...

AT 359 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A CYCLING SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING 
WINDS TO 60 MPH.  THIS STORM WAS LOCATED NEAR HAMBURG...OR 10 MILES
NORTHEAST OF NEWTON...MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  HAMBURG BY 405 PM EDT...
  HIGHLAND LAKE AND VERNON VALLEY BY 415 PM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 4120 7438 4113 7445 4108 7461 4110 7469
      4113 7473 4117 7473 4120 7471 4125 7444
TIME...MOT...LOC 2000Z 253DEG 30KT 4115 7461

$$
 
TFG
866 
WWUS51 KPHI 092017
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
417 PM EDT WED JUL 9 2014

NJC037-092026-
/O.CAN.KPHI.SV.W.0109.000000T0000Z-140709T2030Z/
SUSSEX NJ-
417 PM EDT WED JUL 9 2014

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SUSSEX COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS WEAKENED AND SEVERE WEATHER IS NO LONGER EXPECTED.
 
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
WEDNESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4120 7438 4113 7445 4108 7461 4110 7469
      4113 7473 4117 7473 4120 7471 4125 7444
TIME...MOT...LOC 2016Z 164DEG 12KT 4118 7450

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 8:16 PM EDTSpecial Marine WarningPHI119 min
Jul 8, 8:21 PM EDTSevere Thunderstorm WarningPHICamden, Cumberland, Gloucester, Salem69 min
Jul 8, 8:44 PM EDTSevere Thunderstorm WarningPHIBurlington69 min
Jul 8, 8:56 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more73 min
Jul 8, 9:02 PM EDTSpecial Weather StatementPHIAtlantic, Cape May, Cumberland58 min
Jul 8, 9:12 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean63 min
Jul 8, 9:22 PM EDTSpecial Marine WarningPHI113 min
Jul 8, 9:48 PM EDTSpecial Marine WarningPHI117 min
Jul 9, 8:52 AM EDTSmall Craft AdvisoryPHI12 hr
Jul 9, 2:48 PM EDTSpecial Weather StatementPHISussex72 min
Jul 9, 3:25 PM EDTSpecial Weather StatementPHISussex65 min
Jul 9, 5:38 PM EDTSevere Thunderstorm WarningPHISussex, Warren64 min
Jul 9, 6:27 PM EDTSevere Thunderstorm WarningPHIMorris63 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2014Every severe thunderstorm warning in 2014

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.