Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 100, NWS Philadelphia/Mount Holly

July 14, 20175 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2017, 4:44 PM EDT for 5 counties in New Jersey. It was in force for 61 min. 2 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: Jul 14, 2017, 4:44 PM EDT (20:44 UTC)
Expired: Jul 14, 2017, 5:45 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
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), 61 km from the middle of the area, began a volume at 20:46 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
Jul 14, 5:44 PM EDT	MARINE TSTM WIND 39	1 Ese North Wildwood, NJ	SOUTH DOCK MARINA IN NORTH WILDWOOD
Jul 14, 5:45 PM EDT	TSTM WND GST 41	Sea Isle City, NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 1:40 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.7 hours before the alert went out and 148 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: 908 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 959 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

273 
WUUS51 KPHI 142044
SVRPHI
NJC001-009-011-015-033-142145-
/O.NEW.KPHI.SV.W.0100.170714T2044Z-170714T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
444 PM EDT FRI JUL 14 2017

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...
  Cape May County in southern New Jersey...

* Until 545 PM EDT

* At 443 PM EDT, severe thunderstorms were located along a line
  extending from near Buena to Port Norris to 7 miles southwest of
  Fortesque, moving southeast at 30 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. At 433 pm a 58 mph wind gust was 
           reported at the Millville Airpot. 

  IMPACT...Expect damage to trees and power lines. 

* Severe thunderstorms will be near,
  Bivalve, Leesburg, Mauricetown, Port Norris, Bricksboro and Port 
  Elizabeth around 450 PM EDT. 
  Cumberland around 455 PM EDT. 
  Dorothy, Eldora and Belleplain Forest around 500 PM EDT. 
  Woodbine and Estell Manor around 505 PM EDT. 
  Goshen and Dennisville around 510 PM EDT. 
  Cape May Court House, English Creek and Rio Grande around 520 PM 
  EDT. 
  Somers Point, Avalon, Stone Harbor, Corbin City, Beesleys Point 
  and Scotch Bonnet around 525 PM EDT. 
  Ocean City, North Wildwood, North Cape May, Marmora, Green Creek 
  and Seaville around 530 PM EDT. 

Other locations impacted by these severe thunderstorms include Erma,
Whitesboro-Burleigh, Linwood, Villas and West Wildwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 3919 7462 3891 7486 3892 7497 3915 7492
      3919 7508 3916 7515 3930 7536 3936 7520
      3958 7507 3932 7444
TIME...MOT...LOC 2043Z 309DEG 25KT 3948 7493 3926 7504 3920 7530 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Robertson

2 follow-up statements

691 
WWUS51 KPHI 142111
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
511 PM EDT FRI JUL 14 2017

NJC015-033-142120-
/O.CAN.KPHI.SV.W.0100.000000T0000Z-170714T2145Z/
Salem NJ-Gloucester NJ-
511 PM EDT FRI JUL 14 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SALEM AND
SOUTHEASTERN GLOUCESTER COUNTIES IS CANCELLED...

The storms which prompted the warning have weakened and. moved out 
of the warned area. Therefore, the warning has been cancelled. Heavy 
rain and gusty winds could still be possible this evening.

A severe thunderstorm watch remains in effect until 900 PM EDT for
southern New Jersey.

LAT...LON 3919 7462 3891 7486 3892 7497 3915 7492
      3919 7508 3916 7515 3919 7520 3928 7504
      3947 7481 3932 7444
TIME...MOT...LOC 2110Z 309DEG 25KT 3936 7475 3914 7486 3908 7512 

$$

NJC001-009-011-142145-
/O.CON.KPHI.SV.W.0100.000000T0000Z-170714T2145Z/
Atlantic NJ-Cumberland NJ-Cape May NJ-
511 PM EDT FRI JUL 14 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHWESTERN ATLANTIC...SOUTHEASTERN CUMBERLAND AND CAPE MAY
COUNTIES...

At 510 PM EDT, severe thunderstorms were located along a line
extending from Estell Manor to Goshen to 11 miles south of Fortesque,
moving southeast at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to trees and power lines. 

These severe storms will be near...
  Goshen and Dennisville around 515 PM EDT. 
  Cape May Court House and English Creek around 520 PM EDT. 
  Somers Point, Northfield, Avalon, Stone Harbor, Corbin City and 
  Scotch Bonnet around 525 PM EDT. 
  Ocean City, North Wildwood, Beesleys Point, Marmora and Seaville 
  around 530 PM EDT. 
  Margate City, Sea Isle City, Longport, North Cape May, Strathmere 
  and Green Creek around 535 PM EDT. 
  Cape May, West Cape May and Rio Grande around 540 PM EDT. 
  Wildwood Crest and Diamond Beach around 545 PM EDT. 

Other locations impacted by these severe thunderstorms include Erma,
Whitesboro-Burleigh, Linwood, Villas and West Wildwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 3919 7462 3891 7486 3892 7497 3915 7492
      3919 7508 3916 7515 3919 7520 3928 7504
      3947 7481 3932 7444
TIME...MOT...LOC 2110Z 309DEG 25KT 3936 7475 3914 7486 3908 7512 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Robertson

147 
WWUS51 KPHI 142130
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
530 PM EDT FRI JUL 14 2017

NJC011-142139-
/O.CAN.KPHI.SV.W.0100.000000T0000Z-170714T2145Z/
Cumberland NJ-
530 PM EDT FRI JUL 14 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CUMBERLAND COUNTY
IS CANCELLED...

The storms which prompted the warning have weakened AND moved out of 
the warned area. Therefore, the warning has been cancelled. However 
heavy rain and gusty winds remain possible.

A severe thunderstorm watch remains in effect until 900 PM EDT for
southern New Jersey.

LAT...LON 3919 7462 3891 7486 3892 7497 3912 7492
      3915 7492 3916 7494 3936 7475 3930 7447
TIME...MOT...LOC 2129Z 301DEG 20KT 3930 7471 3908 7482 3902 7507 

$$

NJC001-009-142145-
/O.CON.KPHI.SV.W.0100.000000T0000Z-170714T2145Z/
Atlantic NJ-Cape May NJ-
530 PM EDT FRI JUL 14 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTH CENTRAL ATLANTIC AND CAPE MAY COUNTIES...

At 529 PM EDT, severe thunderstorms were located along a line
extending from near Corbin City to Cape May Court House to 7 miles
northwest of North Cape May, moving southeast at 25 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to trees and power lines. 

Locations impacted include...
Ocean City, Cape May, Somers Point, North Wildwood, Wildwood Crest,
Woodbine, Sea Isle City, Estell Manor, Avalon, West Cape May,
Longport, Stone Harbor, Corbin City, Cape May Court House, Scotch
Bonnet, Beesleys Point, Seaville, Dennisville, Strathmere and North
Cape May.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 3919 7462 3891 7486 3892 7497 3912 7492
      3915 7492 3916 7494 3936 7475 3930 7447
TIME...MOT...LOC 2129Z 301DEG 20KT 3930 7471 3908 7482 3902 7507 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:17 PM EDT	Special Weather Statement	PHI	Camden	43 min
Jul 13, 8:26 PM EDT	Special Weather Statement	PHI	Cape May	34 min
Jul 13, 8:27 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 13, 8:49 PM EDT	Special Weather Statement	PHI	Cumberland	26 min
Jul 13, 8:51 PM EDT	Special Weather Statement	PHI	Atlantic	54 min
Jul 13, 9:07 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	53 min
Jul 13, 9:46 PM EDT	Special Weather Statement	PHI	Atlantic	14 min
Jul 13, 9:50 PM EDT	Special Marine Warning	PHI		115 min
Jul 13, 9:57 PM EDT	Special Weather Statement	PHI	Cape May	33 min
Jul 13, 10:42 PM EDT	Special Marine Warning	PHI		93 min
Jul 14, 7:21 AM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	3 hr
Jul 14, 11:40 AM EDT	Flash Flood Watch	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	11 hr
Jul 14, 2:57 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	3 hr
Jul 14, 3:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 14, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	12 min
Jul 14, 3:23 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	67 min
Jul 14, 3:25 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Ocean, Salem	4 hr
Jul 14, 3:34 PM EDT	Flash Flood Warning	PHI	Gloucester, Salem	3 hr
Jul 14, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester	55 min
Jul 14, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Salem	47 min
Jul 14, 3:47 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Ocean	3 hr
Jul 14, 3:54 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	66 min
Jul 14, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	63 min
Jul 14, 4:13 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	3 hr
Jul 14, 4:18 PM EDT	Special Marine Warning	PHI		57 min
Jul 14, 4:25 PM EDT	Special Marine Warning	PHI		95 min
Jul 14, 4:54 PM EDT	Special Marine Warning	PHI		66 min
Jul 14, 5:47 PM EDT	Special Weather Statement	PHI	Cape May	13 min
Jul 14, 5:53 PM EDT	Special Marine Warning	PHI		52 min
Jul 14, 6:32 PM EDT	Special Marine Warning	PHI		88 min
Jul 14, 7:08 PM EDT	Special Marine Warning	PHI		97 min
Jul 14, 7:28 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	3 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2017 Every severe thunderstorm warning in 2017

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.