Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 230, NWS Philadelphia/Mount Holly

July 17, 20195 counties in New Jersey; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 17, 2019, 7:44 PM EDT for 5 counties in New Jersey; Kent County, New Castle County, Delaware. It was in force for 46 min. 4 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 17, 2019, 7:44 PM EDT (23:44 UTC)
Expired: Jul 17, 2019, 8:30 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, New Castle County, DE, Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 59 km from the middle of the area, began a volume at 23:44 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 17, 7:44 PM EDT	TSTM WND DMG	1 Sse Dover, DE	TREES AND WIRES DOWN IN SOUTH DOVER. TIME ESTIMATED FROM RADAR.
Jul 17, 7:57 PM EDT	TSTM WND GST 52	Newport, NJ
Jul 17, 8:00 PM EDT	TSTM WND DMG	Newport, NJ	SEVERAL REPORTS OF WIRES DOWN ACROSS THE COUNTY. TIME ESTIMATED.
Jul 17, 8:19 PM EDT	TSTM WND GST 48	Millville Municipal Air, NJ	KMIV ASOS.

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 17, 1:58 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 17, 4:51 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.7 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: 1224 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1298 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

177 
WUUS51 KPHI 172344
SVRPHI
DEC001-003-NJC001-009-011-015-033-180030-
/O.NEW.KPHI.SV.W.0230.190717T2344Z-190718T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
744 PM EDT Wed Jul 17 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  South central New Castle County in northern Delaware...
  Northeastern Kent County in central Delaware...
  Southwestern Atlantic County in southern New Jersey...
  Cumberland County in southern New Jersey...
  Southern Salem County in southern New Jersey...
  Southeastern Gloucester County in southern New Jersey...
  North central Cape May County in southern New Jersey...

* Until 830 PM EDT.

* At 744 PM EDT, severe thunderstorms were located along a line
  extending from near Woodland Beach to near Dover, moving northeast
  at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Vineland, Dover, Millville, Bridgeton, Cumberland, Smyrna, Buena,
  Laurel Lake, Clayton, Estell Manor, Newfield, Cheswold, Greenwich,
  Shiloh, Corbin City, Newport, Woodland Beach, Dorothy, Newport
  Meadows and Bricksboro.

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 3943 7555 3937 7552 3935 7549 3939 7543
      3942 7545 3942 7547 3943 7546 3945 7549
      3960 7491 3931 7477 3922 7517 3930 7527
      3921 7539 3917 7541 3912 7564 3940 7567
TIME...MOT...LOC 2344Z 241DEG 37KT 3939 7550 3917 7546 

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

Fitzsimmons

2 follow-up statements

223 
WWUS51 KPHI 180005
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
805 PM EDT Wed Jul 17 2019

DEC001-003-180015-
/O.CAN.KPHI.SV.W.0230.000000T0000Z-190718T0030Z/
New Castle DE-Kent DE-
805 PM EDT Wed Jul 17 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL NEW CASTLE AND
NORTHEASTERN KENT COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

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

LAT...LON 3928 7530 3949 7535 3956 7508 3960 7491
      3931 7477 3922 7517 3930 7527
TIME...MOT...LOC 0005Z 244DEG 39KT 3951 7521 3926 7516 

$$

NJC001-009-011-015-033-180030-
/O.CON.KPHI.SV.W.0230.000000T0000Z-190718T0030Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Gloucester NJ-Cape May NJ-
805 PM EDT Wed Jul 17 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SOUTHWESTERN ATLANTIC...CUMBERLAND...EAST CENTRAL SALEM...
SOUTHEASTERN GLOUCESTER AND NORTH CENTRAL CAPE MAY COUNTIES...

At 805 PM EDT, severe thunderstorms were located along a line
extending from Seabrook Farms to Fortesque, moving northeast at 45
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Vineland, Millville, Bridgeton, Cumberland, Buena, Laurel Lake,
Estell Manor, Newfield, Shiloh, Corbin City, Newport, Dorothy,
Bricksboro, Fortesque, Mauricetown, Dividing Creek, Fairton,
Cedarville, Port Elizabeth and Seabrook Farms.

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 3928 7530 3949 7535 3956 7508 3960 7491
      3931 7477 3922 7517 3930 7527
TIME...MOT...LOC 0005Z 244DEG 39KT 3951 7521 3926 7516 

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

PF

109 
WWUS51 KPHI 180026
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
826 PM EDT Wed Jul 17 2019

NJC001-009-011-015-033-180036-
/O.EXP.KPHI.SV.W.0230.000000T0000Z-190718T0030Z/
Atlantic NJ-Cumberland NJ-Salem NJ-Gloucester NJ-Cape May NJ-
826 PM EDT Wed Jul 17 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ATLANTIC...
CUMBERLAND...EAST CENTRAL SALEM...SOUTHEASTERN GLOUCESTER AND NORTH
CENTRAL CAPE MAY COUNTIES WILL EXPIRE AT 830 PM EDT...
    
The storms which prompted the warning are weakening and moving out 
of the area. Therefore, the warning will be allowed to expire. 
However gusty winds are still possible with these thunderstorms as 
they move out. 

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

LAT...LON 3928 7530 3949 7535 3956 7508 3960 7491
      3931 7477 3922 7517 3930 7527
TIME...MOT...LOC 0026Z 241DEG 37KT 3960 7499 3935 7494 

$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:50 AM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	17 hr
Jul 17, 3:54 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 6 more	19 hr
Jul 17, 1:50 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	80 min
Jul 17, 1:57 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	32 min
Jul 17, 2:21 PM EDT	Special Weather Statement	PHI	Warren	24 min
Jul 17, 2:28 PM EDT	Special Weather Statement	PHI	Sussex	32 min
Jul 17, 2:44 PM EDT	Special Weather Statement	PHI	Sussex	31 min
Jul 17, 3:14 PM EDT	Excessive Heat Watch	PHI	Atlantic, Burlington, Cape May, Cumberland, Hunterdon, Middlesex and 7 more	24 hr
Jul 17, 6:22 PM EDT	Special Weather Statement	PHI	Sussex	38 min
Jul 17, 6:39 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	51 min
Jul 17, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	45 min
Jul 17, 7:16 PM EDT	Special Marine Warning	PHI		59 min
Jul 17, 7:27 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris	48 min
Jul 17, 7:44 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Somerset	3 hr
Jul 17, 7:56 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester	64 min
Jul 17, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	40 min
Jul 17, 6:44 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	46 min
Jul 17, 7:17 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	43 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2019 Severe Thunderstorm Warnings in Delaware, 2019 Every severe thunderstorm warning in 2019

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.