Alert archive / New Jersey / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 28, NWS Philadelphia/Mount Holly

June 1, 2015Cumberland County, Gloucester County, Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 2015, 4:32 PM EDT for Cumberland County, Gloucester County, Salem County, New Jersey; New Castle County, Delaware. It was in force for 43 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: Jun 1, 2015, 4:32 PM EDT (20:32 UTC)
Expired: Jun 1, 2015, 5:15 PM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 88 km from the middle of the area, began a volume at 20:36 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

Time	Report	Where	Remark
Jun 1, 4:38 PM EDT	HAIL 0.25	New Castle County Airpo, DE	PEA SIZE HAIL OBSERVED BY TOWER OFFICIALS AT THE NEW CASTLE COUNTY AIRPORT.
Jun 1, 4:40 PM EDT	TSTM WND DMG	Eastburn Heights, DE	TRAFFIC SIGNALS KNOCKED DOWN ON PORTIONS OF KIRKWOOD HIGHWAY. SOME TREES WERE ALSO DOWN ONTO POWER LINES IN THE AREA. NUMEROUS POWER OUTAGES REPORTED. TIME ESTIMATED BASED ON RADAR DATA.
Jun 1, 4:40 PM EDT	HAIL 1.25	New Castle, DE	HAIL UP TO HALF DOLLAR SIZE REPORTED IN NEW CASTLE.

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, 8.5 hours before the alert went out and 51 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: 355 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 102 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.

183 
WUUS51 KPHI 012032
SVRPHI
DEC003-NJC011-015-033-012115-
/O.NEW.KPHI.SV.W.0028.150601T2032Z-150601T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
432 PM EDT MON JUN 1 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  WEST CENTRAL GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  SALEM COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 515 PM EDT

* AT 431 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED NEAR BEAR...OR 7 MILES SOUTHEAST
  OF NEWARK...AND MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WILMINGTON...PENNSVILLE...CARNEYS POINT...NEW CASTLE...PENNS
  GROVE...SALEM...WOODSTOWN...ALLOWAY...QUINTON...DELAWARE CITY...
  NEWPORT...HANCOCKS BRIDGE...BEAR...WILMINGTON MANOR...SEABROOK
  FARMS...SAINT GEORGES...STANTON...PIKE CREEK...GLASGOW AND
  BROOKSIDE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A SUPERCELL THUNDERSTORM. DUE TO THE ROTATING NATURE OF THESE
STORMS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE 
WEATHER... INCLUDING LARGE HAIL...DAMAGING STRAIGHT LINE WINDS... 
AND POSSIBLY BRIEF TORNADOES. MOVE QUICKLY TO A SAFE 
SHELTER...PREFERABLY INTO A BASEMENT...OR AN INTERIOR ROOM SUCH AS A 
BATHROOM OR CLOSET.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3972 7570 3972 7552 3963 7560 3963 7557
      3966 7552 3972 7550 3972 7521 3946 7521
      3951 7553 3957 7551 3961 7556 3959 7558
      3962 7557 3960 7561 3957 7557 3952 7557
      3954 7573
TIME...MOT...LOC 2031Z 277DEG 21KT 3963 7562 

$$

1 follow-up statement

605 
WWUS51 KPHI 012101
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
501 PM EDT MON JUN 1 2015

DEC003-012110-
/O.CAN.KPHI.SV.W.0028.000000T0000Z-150601T2115Z/
NEW CASTLE DE-
501 PM EDT MON JUN 1 2015

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NEW CASTLE COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 3964 7555 3966 7552 3969 7551 3971 7549
      3972 7521 3951 7521 3946 7522 3951 7545
      3952 7547 3953 7552 3957 7551 3959 7555
TIME...MOT...LOC 2100Z 277DEG 21KT 3962 7547 

$$

NJC011-015-033-012115-
/O.CON.KPHI.SV.W.0028.000000T0000Z-150601T2115Z/
GLOUCESTER NJ-SALEM NJ-CUMBERLAND NJ-
501 PM EDT MON JUN 1 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR WEST CENTRAL GLOUCESTER...SALEM AND NORTHWESTERN CUMBERLAND
COUNTIES...

AT 500 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS TO 60 MPH. 
THIS STORM WAS LOCATED NEAR PENNSVILLE...OR 8 MILES SOUTHEAST OF 
WILMINGTON...MOVING EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
PENNSVILLE...CARNEYS POINT...SALEM...WOODSTOWN...ALLOWAY...QUINTON
AND SEABROOK FARMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A SUPERCELL THUNDERSTORM. DUE TO THE ROTATING NATURE OF THESE
STORMS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE 
WEATHER... INCLUDING LARGE HAIL...DAMAGING STRAIGHT LINE WINDS... 
AND POSSIBLY A TORNADO. MOVE QUICKLY TO A SAFE SHELTER...PREFERABLY 
INTO A BASEMENT...OR AN INTERIOR ROOM SUCH AS A BATHROOM OR CLOSET.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3964 7555 3966 7552 3969 7551 3971 7549
      3972 7521 3951 7521 3946 7522 3951 7545
      3952 7547 3953 7552 3957 7551 3959 7555
TIME...MOT...LOC 2100Z 277DEG 21KT 3962 7547 

$$
 
TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 8:13 PM EDT	Flash Flood Warning	PHI	Somerset	5 hr
May 31, 8:43 PM EDT	Special Weather Statement	PHI	Hunterdon	62 min
May 31, 9:06 PM EDT	Flash Flood Warning	PHI	Hunterdon	5 hr
Jun 1, 1:57 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset, Warren	3 hr
Jun 1, 2:17 AM EDT	Special Weather Statement	PHI	Camden, Gloucester, Mercer, Salem	43 min
Jun 1, 2:55 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer	2 hr
Jun 1, 3:20 AM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth, Somerset	115 min
Jun 1, 3:35 AM EDT	Special Weather Statement	PHI	Atlantic, Monmouth, Ocean	25 min
Jun 1, 4:20 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 8 more	26 hr
Jun 1, 5:56 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	3 hr
Jun 1, 10:05 AM EDT	Areal Flood Advisory	PHI	Middlesex, Somerset	4 hr
Jun 1, 10:11 AM EDT	Small Craft Advisory	PHI		4 days
Jun 1, 2:28 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	32 min
Jun 1, 3:04 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	56 min
Jun 1, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington	46 min
Jun 1, 3:42 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	6 hr
Jun 1, 3:56 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May	79 min
Jun 1, 4:26 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Ocean	3 hr
Jun 1, 4:37 PM EDT	Tornado Warning	PHI	Salem	23 min
Jun 1, 5:27 PM EDT	Areal Flood Advisory	PHI	Cumberland, Gloucester, Salem	3 hr
Jun 1, 5:34 PM EDT	Areal Flood Advisory	PHI	Cape May	3 hr
Jun 1, 7:18 PM EDT	Flash Flood Warning	PHI	Cumberland	3 hr
Jun 1, 7:26 PM EDT	Special Marine Warning	PHI		34 min
Jun 1, 7:54 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May	111 min
Jun 1, 3:13 AM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Jun 1, 4:35 PM EDT	Flash Flood Warning	PHI	New Castle	3 hr
Jun 1, 6:11 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	6 hr
Jun 1, 6:29 PM EDT	Flash Flood Warning	PHI	New Castle	3 hr
Jun 1, 6:53 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	37 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2015 Severe Thunderstorm Warnings in Delaware, 2015 Every severe thunderstorm warning in 2015

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.