Alert archive / New Jersey / Special Weather Statements in 2020

Special Weather Statement, NWS Philadelphia/Mount Holly

August 23, 2020Atlantic County, Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 23, 2020, 12:21 PM EDT for Atlantic County, Gloucester County, New Jersey. It was in force for 69 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: Aug 23, 2020, 12:21 PM EDT (16:21 UTC)
Expired: Aug 23, 2020, 1:30 PM EDT
In force: 69 min
Issued by: NWS Philadelphia/Mount Holly

Counties Atlantic County, NJ, Gloucester County, NJ

The radar

The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 16:23 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 12:00Z, 4.4 hours before the alert went out and 187 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: 1300 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 845 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

221 
WWUS81 KPHI 231621
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1221 PM EDT Sun Aug 23 2020

NJZ016>018-021-022-024-025-027-231730-
Coastal Atlantic-Salem-Cumberland-Camden-Atlantic-Atlantic Coastal
Cape May-Gloucester-Southeastern Burlington-
1221 PM EDT Sun Aug 23 2020

...A BROKEN LINE OF SHOWERS AND THUNDERSTORMS WILL AFFECT 
ATLANTIC...NORTHEASTERN CUMBERLAND...EAST CENTRAL SALEM...SOUTHERN 
CAMDEN AND SOUTHERN GLOUCESTER COUNTIES...

At 1217 PM EDT, radar indicated thunderstorms were located along a 
line extending from near Franklinville to near Vineland to near 
Seaville. Movement was northeast at 10 mph.

Areas of heavy rainfall were occurring with these showers and 
storms...and may cause ponding on roadways and poor drainage areas. 
Do not drive your vehicle through flooded roadways.

Occasional cloud to ground lightning was occurring with these 
storms. Lightning can strike 15 miles away from a thunderstorm. If 
you see lightning or hear thunder seek a safe shelter inside a 
building or vehicle.

Locations impacted include...
Vineland, Atlantic City, Ocean City, Pleasantville, Glassboro,
Lindenwold, Hammonton, Somers Point, Ventnor City, Brigantine,
Pitman, Northfield, Absecon, Clayton, Margate City, Buena, Egg Harbor
City, Woodstown, Weymouth and Estell Manor.

This includes the following highways...
 Garden State Parkway between mile markers 28 and 49.
 Atlantic City Expressway between mile markers 0 and 44.

LAT...LON 3943 7418 3924 7453 3965 7544 3981 7502
TIME...MOT...LOC 1617Z 246DEG 10KT 3968 7526 3934 7451 

$$

Kruzdlo

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 11:30 AM EDT	Special Weather Statement	PHI	Atlantic	30 min
Aug 23, 12:59 PM EDT	Special Weather Statement	PHI	Burlington, Camden	61 min
Aug 23, 1:45 PM EDT	Special Weather Statement	PHI	Salem	60 min
Aug 23, 3:13 PM EDT	Special Weather Statement	PHI	Gloucester	32 min
Aug 23, 3:44 PM EDT	Special Weather Statement	PHI	Salem	31 min
Aug 23, 3:53 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cumberland, Gloucester, Salem	3 hr
Aug 23, 4:10 PM EDT	Special Weather Statement	PHI	Salem	35 min
Aug 23, 4:45 PM EDT	Special Weather Statement	PHI	Cumberland	30 min
Aug 23, 4:53 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	52 min
Aug 23, 5:18 PM EDT	Special Weather Statement	PHI	Atlantic	27 min
Aug 23, 5:33 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	57 min
Aug 23, 6:00 PM EDT	Special Marine Warning	PHI		42 min
Aug 23, 2:04 PM EDT	Areal Flood Advisory	PHI	Bucks, Philadelphia	112 min
Aug 23, 2:07 PM EDT	Areal Flood Advisory	PHI	Delaware	3 hr
Aug 23, 2:14 PM EDT	Areal Flood Advisory	PHI	Chester	3 hr
Aug 23, 4:41 PM EDT	Areal Flood Advisory	PHI	Berks, Chester	5 hr
Aug 23, 2:40 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Aug 23, 3:08 PM EDT	Special Weather Statement	PHI	New Castle	37 min
Aug 23, 5:17 PM EDT	Special Weather Statement	PHI	Kent	28 min
Aug 23, 7:58 PM EDT	Severe Thunderstorm Warning	PHI	Kent	25 min

Nearby

Special Weather Statements in New Jersey, 2020 Every special weather statement in 2020

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.