Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 122, NWS Philadelphia/Mount Holly

July 23, 2017Cumberland County, Gloucester County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2017, 10:23 PM EDT for Cumberland County, Gloucester County, Salem County, New Jersey. It was in force for 52 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 23, 2017, 10:23 PM EDT (02:23 UTC)
Expired: Jul 23, 2017, 11:15 PM EDT
In force: 52 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 81 km from the middle of the area, began a volume at 02:26 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 nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.4 hours before the alert went out and 188 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: 771 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 995 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

As transmitted.

233 
WUUS51 KPHI 240223
SVRPHI
NJC011-015-033-240315-
/O.NEW.KPHI.SV.W.0122.170724T0223Z-170724T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1023 PM EDT SUN JUL 23 2017

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  North central Cumberland County in southern New Jersey...
  Central Salem County in southern New Jersey...
  Central Gloucester County in southern New Jersey...

* Until 1115 PM EDT

* At 1023 PM EDT, severe thunderstorms were located along a line
  extending from near Woodstown to Alloway, moving east at 15 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Severe thunderstorms will be near,
  Elmer around 1055 PM EDT. 
  Olivet around 1105 PM EDT. 
  Glassboro and Clayton around 1115 PM EDT. 

Other locations impacted by these severe thunderstorms include
Centerton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

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

&&

LAT...LON 3971 7516 3964 7507 3951 7518 3953 7539
      3959 7540 3961 7540
TIME...MOT...LOC 0223Z 263DEG 12KT 3961 7535 3960 7531 3955 7534 

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

2 follow-up statements

492 
WWUS51 KPHI 240248
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1048 PM EDT SUN JUL 23 2017

NJC011-015-033-240315-
/O.CON.KPHI.SV.W.0122.000000T0000Z-170724T0315Z/
Cumberland NJ-Salem NJ-Gloucester NJ-
1048 PM EDT SUN JUL 23 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR NORTH CENTRAL CUMBERLAND...EAST CENTRAL SALEM AND CENTRAL
GLOUCESTER COUNTIES...

At 1047 PM EDT, severe thunderstorms were located along a line
extending from near Woodstown to near Elmer to near Olivet, moving
east at 15 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

These severe storms will be near...
  Elmer around 1100 PM EDT. 
  Olivet around 1105 PM EDT. 
  Clayton around 1115 PM EDT. 

Other locations impacted by these severe thunderstorms include
Centerton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

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

&&

LAT...LON 3968 7513 3964 7507 3951 7518 3954 7526
      3959 7526 3962 7527
TIME...MOT...LOC 0247Z 263DEG 12KT 3962 7525 3961 7521 3956 7524 

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

Drag

543 
WWUS51 KPHI 240259
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1059 PM EDT SUN JUL 23 2017

NJC011-240308-
/O.CAN.KPHI.SV.W.0122.000000T0000Z-170724T0315Z/
Cumberland NJ-
1059 PM EDT SUN JUL 23 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CUMBERLAND
COUNTY IS CANCELLED...

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

LAT...LON 3966 7511 3964 7507 3953 7516 3956 7522
      3960 7519 3962 7522
TIME...MOT...LOC 0258Z 269DEG 12KT 3961 7521 3959 7517 3955 7520 

$$

NJC015-033-240315-
/O.CON.KPHI.SV.W.0122.000000T0000Z-170724T0315Z/
Salem NJ-Gloucester NJ-
1059 PM EDT SUN JUL 23 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR EAST CENTRAL SALEM AND CENTRAL GLOUCESTER COUNTIES...

At 1058 PM EDT, severe thunderstorms were located along a line
extending from 6 miles west of Franklinville to Elmer to Olivet,
moving east at 15 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

These severe storms will be near...
  Clayton around 1115 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

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

&&

LAT...LON 3966 7511 3964 7507 3953 7516 3956 7522
      3960 7519 3962 7522
TIME...MOT...LOC 0258Z 269DEG 12KT 3961 7521 3959 7517 3955 7520 

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

Drag

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 9:39 PM EDT	Areal Flood Advisory	PHI	Gloucester, Salem	4 hr
Jul 23, 10:18 PM EDT	Flash Flood Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	8 hr
Jul 23, 10:54 PM EDT	Special Weather Statement	PHI	Gloucester	51 min
Jul 23, 11:38 PM EDT	Tornado Warning	PHI	Atlantic, Cape May	37 min
Jul 23, 11:41 PM EDT	Special Marine Warning	PHI		64 min
Jul 23, 11:43 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean, Salem	6 hr
Jul 23, 11:50 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Monmouth, Ocean	6 hr
Jul 24, 12:04 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester, Salem	41 min
Jul 24, 12:35 AM EDT	Special Marine Warning	PHI		55 min
Jul 24, 12:56 AM EDT	Special Weather Statement	PHI	Atlantic	34 min
Jul 24, 1:23 AM EDT	Special Marine Warning	PHI		97 min
Jul 24, 1:33 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	5 hr
Jul 24, 2:02 AM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	43 min
Jul 24, 2:08 AM EDT	Special Marine Warning	PHI		97 min
Jul 24, 2:10 AM EDT	Special Marine Warning	PHI		95 min
Jul 24, 2:34 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	41 min
Jul 24, 2:44 AM EDT	Special Marine Warning	PHI		91 min
Jul 24, 3:00 AM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester, Salem	4 hr
Jul 24, 3:03 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	57 min
Jul 24, 3:17 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Warren	118 min
Jul 24, 3:21 AM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	3 hr
Jul 24, 3:34 AM EDT	Special Marine Warning	PHI		116 min
Jul 24, 3:36 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 2 more	6 hr
Jul 24, 3:55 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	50 min
Jul 24, 9:30 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset	60 min
Jul 24, 10:04 AM EDT	Small Craft Advisory for Hazardous Seas	PHI		8 hr
Jul 24, 10:40 AM EDT	Areal Flood Warning	PHI	Cumberland	10 hr
Jul 24, 2:55 PM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean	11 hr
Jul 24, 7:07 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	113 min
Jul 24, 7:48 PM EDT	Areal Flood Advisory	PHI	Hunterdon	117 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.