Alert archive / New Jersey / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 57, NWS Philadelphia/Mount Holly

July 27, 20185 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2018, 4:18 PM EDT for 5 counties in New Jersey. It was in force for 42 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 27, 2018, 4:18 PM EDT (20:18 UTC)
Expired: Jul 27, 2018, 5:00 PM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 72 km from the middle of the area, began a volume at 20:19 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 27, 1:17 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.3 hours before the alert went out and 165 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: 1842 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

082 
WUUS51 KPHI 272018
SVRPHI
NJC001-009-011-015-033-272100-
/O.NEW.KPHI.SV.W.0057.180727T2018Z-180727T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
418 PM EDT FRI JUL 27 2018

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Atlantic County in southern New Jersey...
  Cumberland County in southern New Jersey...
  East central Salem County in southern New Jersey...
  Southeastern Gloucester County in southern New Jersey...
  Northwestern Cape May County in southern New Jersey...

* Until 500 PM EDT.

* At 417 PM EDT, severe thunderstorms were located along a line
  extending from near Mizpah to 8 miles southwest of Cedarville,
  moving east at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Vineland, Millville, Bridgeton, Cumberland, Hammonton, Buena, Egg
  Harbor City, Laurel Lake, Weymouth, Estell Manor, Newfield,
  Greenwich, Shiloh, Corbin City, Newport, Leesburg, Elwood-Magnolia,
  Dorothy, Bricksboro and Fortesque.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3954 7451 3915 7496 3919 7508 3917 7513
      3930 7537 3936 7543 3957 7516 3964 7500
TIME...MOT...LOC 2017Z 260DEG 19KT 3954 7486 3927 7533 

HAIL...0.75IN
WIND...60MPH
 
$$

CMS

2 follow-up statements

069 
WWUS51 KPHI 272034
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
434 PM EDT FRI JUL 27 2018

NJC001-009-011-015-033-272100-
/O.CON.KPHI.SV.W.0057.000000T0000Z-180727T2100Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Gloucester NJ-Cape May NJ-
434 PM EDT FRI JUL 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTHWESTERN ATLANTIC...CUMBERLAND...SOUTHEASTERN SALEM...
SOUTHEASTERN GLOUCESTER AND NORTHWESTERN CAPE MAY COUNTIES...

At 434 PM EDT, severe thunderstorms were located along a line
extending from near Elwood-Magnolia to near Newport, moving east at
20 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Vineland, Millville, Cumberland, Hammonton, Buena, Egg Harbor City,
Laurel Lake, Weymouth, Estell Manor, Newfield, Corbin City, Newport,
Leesburg, Elwood-Magnolia, Dorothy, Bricksboro, Fortesque, Eldora,
Mauricetown and Belleplain Forest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3915 7495 3919 7508 3917 7513 3928 7533
      3963 7497 3954 7451
TIME...MOT...LOC 2034Z 260DEG 19KT 3955 7476 3928 7523 

HAIL...0.75IN
WIND...60MPH
 
$$

CMS

422 
WWUS51 KPHI 272053
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
453 PM EDT FRI JUL 27 2018

NJC001-009-011-015-033-272103-
/O.EXP.KPHI.SV.W.0057.000000T0000Z-180727T2100Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Gloucester NJ-Cape May NJ-
453 PM EDT FRI JUL 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ATLANTIC...
CUMBERLAND...SOUTHEASTERN SALEM...SOUTHEASTERN GLOUCESTER AND
NORTHWESTERN CAPE MAY COUNTIES WILL EXPIRE AT 500 PM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

A severe thunderstorm watch remains in effect until 1000 PM EDT for
southern New Jersey.

LAT...LON 3915 7495 3919 7508 3917 7513 3928 7533
      3963 7497 3954 7451
TIME...MOT...LOC 2053Z 260DEG 19KT 3956 7465 3929 7512 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 9:29 AM EDT	Special Weather Statement	PHI	Salem	61 min
Jul 27, 9:50 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 7 more	13 hr
Jul 27, 10:08 AM EDT	Special Weather Statement	PHI	Cumberland	67 min
Jul 27, 10:34 AM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	10 hr
Jul 27, 11:11 AM EDT	Special Weather Statement	PHI	Atlantic	64 min
Jul 27, 12:10 PM EDT	Special Weather Statement	PHI	Atlantic	65 min
Jul 27, 12:24 PM EDT	Areal Flood Advisory	PHI	Cape May	114 min
Jul 27, 1:15 PM EDT	Special Weather Statement	PHI	Salem	45 min
Jul 27, 1:23 PM EDT	Special Weather Statement	PHI	Morris	52 min
Jul 27, 1:31 PM EDT	Special Marine Warning	PHI		59 min
Jul 27, 1:38 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	4 hr
Jul 27, 2:04 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset	41 min
Jul 27, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	46 min
Jul 27, 2:19 PM EDT	Special Marine Warning	PHI		56 min
Jul 27, 2:22 PM EDT	Special Marine Warning	PHI		53 min
Jul 27, 2:26 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	6 hr
Jul 27, 2:40 PM EDT	Special Marine Warning	PHI		65 min
Jul 27, 2:59 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	46 min
Jul 27, 3:09 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	6 hr
Jul 27, 3:14 PM EDT	Special Marine Warning	PHI		61 min
Jul 27, 3:45 PM EDT	Special Weather Statement	PHI	Cumberland	30 min
Jul 27, 4:12 PM EDT	Special Marine Warning	PHI		63 min
Jul 27, 4:19 PM EDT	Flash Flood Warning	PHI	Cumberland	4 hr
Jul 27, 4:25 PM EDT	Areal Flood Advisory	PHI	Middlesex, Somerset	7 hr
Jul 27, 4:32 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	43 min
Jul 27, 4:43 PM EDT	Areal Flood Advisory	PHI	Mercer	5 hr
Jul 27, 4:54 PM EDT	Flash Flood Warning	PHI	Middlesex	4 hr
Jul 27, 5:03 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cumberland	4 hr
Jul 27, 5:23 PM EDT	Special Marine Warning	PHI		67 min
Jul 27, 5:46 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	4 hr
Jul 27, 6:10 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth, Somerset	4 hr
Jul 27, 7:14 PM EDT	Special Marine Warning	PHI		61 min
Jul 27, 7:15 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jul 27, 7:51 PM EDT	Special Weather Statement	PHI	Atlantic	39 min
Jul 27, 7:55 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Somerset, Warren	108 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2018 Every severe thunderstorm warning in 2018

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.