Alert archive / New Jersey / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 55, NWS Philadelphia/Mount Holly

July 27, 2018Cumberland County, Salem County, New Jersey; Kent County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2018, 2:59 PM EDT for Cumberland County, Salem County, New Jersey; Kent County, Delaware. 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 27, 2018, 2:59 PM EDT (18:59 UTC)
Expired: Jul 27, 2018, 3:45 PM EDT
In force: 46 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Kent County, DE, Cumberland County, NJ, Salem County, NJ

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, 7.0 hours before the alert went out and 158 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.

230 
WUUS51 KPHI 271859
SVRPHI
DEC001-NJC011-033-271945-
/O.NEW.KPHI.SV.W.0055.180727T1859Z-180727T1945Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Kent County in central Delaware...
  Western Cumberland County in southern New Jersey...
  Southwestern Salem County in southern New Jersey...

* Until 345 PM EDT.

* At 258 PM EDT, a severe thunderstorm was located over Newport
  Meadows, or 8 miles west of Bridgeton, moving east at 10 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...
  Bridgeton, Greenwich, Shiloh, Newport, Newport Meadows, Fairton,
  Woodland Beach, Cedarville, Seabrook Farms, Fortesque, Rosenhayn
  and Leipsic.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3954 7543 3950 7515 3918 7511 3919 7521
      3939 7548 3927 7537 3923 7537 3925 7553
      3936 7553 3936 7552 3940 7554
TIME...MOT...LOC 1858Z 276DEG 8KT 3940 7539 

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

CMS

2 follow-up statements

874 
WWUS51 KPHI 271920
SVSPHI

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

DEC001-NJC011-033-271945-
/O.CON.KPHI.SV.W.0055.000000T0000Z-180727T1945Z/
Kent DE-Cumberland NJ-Salem NJ-
320 PM EDT FRI JUL 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTH CENTRAL KENT...WESTERN CUMBERLAND AND SOUTH CENTRAL SALEM
COUNTIES...

At 319 PM EDT, a severe thunderstorm was located over Greenwich, or
near Bridgeton, moving east at 10 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...
Bridgeton, Greenwich, Shiloh, Newport, Newport Meadows, Fairton,
Woodland Beach, Cedarville, Fortesque, Seabrook Farms and Rosenhayn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3937 7547 3933 7543 3934 7541 3938 7547
      3949 7540 3950 7515 3918 7512 3919 7520
      3933 7540 3932 7542 3927 7537 3925 7537
      3931 7551
TIME...MOT...LOC 1919Z 276DEG 8KT 3939 7533 

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

CMS

547 
WWUS51 KPHI 271943
SVSPHI

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

DEC001-NJC011-033-271953-
/O.EXP.KPHI.SV.W.0055.000000T0000Z-180727T1945Z/
Kent DE-Cumberland NJ-Salem NJ-
343 PM EDT FRI JUL 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL KENT...WESTERN
CUMBERLAND AND SOUTH CENTRAL SALEM COUNTIES WILL EXPIRE AT 345 PM
EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses 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 this thunderstorm.

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

LAT...LON 3937 7547 3933 7543 3934 7541 3938 7547
      3949 7540 3950 7515 3918 7512 3919 7520
      3933 7540 3932 7542 3927 7537 3925 7537
      3931 7551
TIME...MOT...LOC 1943Z 276DEG 8KT 3939 7527 

$$

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, 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, 4:18 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	42 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
Jul 27, 8:37 AM EDT	Special Weather Statement	PHI	New Castle	23 min
Jul 27, 2:15 PM EDT	Areal Flood Advisory	PHI	Sussex	6 hr
Jul 27, 4:19 PM EDT	Special Weather Statement	PHI	Sussex	41 min
Jul 27, 5:03 PM EDT	Special Weather Statement	PHI	Kent	27 min
Jul 27, 5:08 PM EDT	Areal Flood Advisory	PHI	Kent	4 hr
Jul 27, 5:09 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Jul 27, 5:44 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	3 hr
Jul 27, 6:03 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	42 min
Jul 27, 6:06 PM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Jul 27, 6:53 PM EDT	Special Weather Statement	PHI	New Castle	52 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2018 Severe Thunderstorm Warnings in Delaware, 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.