Alert archive / New Jersey / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 128, NWS Philadelphia/Mount Holly

July 14, 2014New Castle County, Delaware; Gloucester County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2014, 7:29 PM EDT for New Castle County, Delaware; Gloucester County, Salem County, New Jersey. It was in force for 46 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 14, 2014, 7:29 PM EDT (23:29 UTC)
Expired: Jul 14, 2014, 8:15 PM EDT
In force: 46 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Gloucester County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 84 km from the middle of the area, began a volume at 23:30 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 14, 1:24 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.5 hours before the alert went out and 62 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 483 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 844 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 125 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.

272 
WUUS51 KPHI 142329
SVRPHI
DEC003-NJC015-033-150015-
/O.NEW.KPHI.SV.W.0128.140714T2329Z-140715T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
729 PM EDT MON JUL 14 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  EASTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 815 PM EDT

* AT 727 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  EDGEMOOR TO SALEM TO WOODLAND BEACH...MOVING EAST AT 45 MPH. THESE
  STORMS ARE CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ALLOWAY AROUND 735 PM EDT...
  WOODSTOWN AND SWEDESBORO AROUND 740 PM EDT...
  MULLICA HILL AND GIBBSTOWN AROUND 745 PM EDT...
  OLIVET AND WEST DEPTFORD AROUND 750 PM EDT...
  WOODBURY HEIGHTS AND WOODBURY AROUND 755 PM EDT...
  TURNERSVILLE AND MALAGA AROUND 800 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

VERY HEAVY RAIN WILL ALSO OCCUR WITH THIS LINE OF SEVERE
THUNDERSTORMS...WHICH COULD FLOOD LOW LYING AREAS QUICKLY AND COVER
ROADS WITH WATER. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS LINE OF
SEVERE THUNDERSTORMS. WHEN THUNDER ROARS...MOVE INDOORS! REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT MONDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.

&&

LAT...LON 3979 7562 3980 7541 3989 7514 3970 7500
      3954 7498 3957 7506 3948 7512 3956 7524
      3946 7541 3938 7542 3945 7554 3937 7550
      3933 7557 3957 7552 3959 7555 3950 7556
      3963 7559 3965 7557
TIME...MOT...LOC 2329Z 249DEG 39KT 3978 7550 3958 7543
          3932 7550

$$

FORECASTER: SZATKOWSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 10:02 PM EDT	Special Weather Statement	PHI	New Castle	58 min
Jul 13, 10:14 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	46 min
Jul 13, 10:48 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	37 min
Jul 14, 3:54 AM EDT	Flash Flood Watch	PHI	Kent, New Castle, Sussex	45 hr
Jul 14, 7:03 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	42 min
Jul 14, 7:49 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	51 min
Jul 13, 9:16 PM EDT	Special Weather Statement	PHI	Warren	89 min
Jul 13, 9:33 PM EDT	Severe Thunderstorm Warning	PHI	Warren	57 min
Jul 13, 10:18 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset	57 min
Jul 13, 10:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	47 min
Jul 13, 10:41 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Warren	2 hr
Jul 13, 11:05 PM EDT	Special Marine Warning	PHI		85 min
Jul 13, 11:07 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Somerset	38 min
Jul 13, 11:21 PM EDT	Special Weather Statement	PHI	Burlington, Camden	54 min
Jul 13, 11:27 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset	2 hr
Jul 13, 11:47 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	43 min
Jul 14, 4:02 AM EDT	Small Craft Advisory	PHI		24 hr
Jul 14, 4:08 PM EDT	Special Weather Statement	PHI	Monmouth	52 min
Jul 14, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	63 min
Jul 14, 4:17 PM EDT	Special Weather Statement	PHI	Sussex	58 min
Jul 14, 4:21 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex	3 hr
Jul 14, 4:28 PM EDT	Flash Flood Warning	PHI	Monmouth, Ocean	4 hr
Jul 14, 5:33 PM EDT	Special Weather Statement	PHI	Monmouth	57 min
Jul 14, 5:54 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Warren	4 hr
Jul 14, 6:15 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Sussex, Warren	4 hr
Jul 14, 6:54 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Somerset	3 hr
Jul 14, 7:17 PM EDT	Special Weather Statement	PHI	Mercer	58 min
Jul 14, 7:39 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	3 hr
Jul 14, 7:53 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	67 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2014 Severe Thunderstorm Warnings in Delaware, 2014 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.