Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

June 21, 20215 counties in New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 21, 2021, 7:55 PM EDT for 5 counties in New Jersey. It was in force for 50 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: Jun 21, 2021, 7:55 PM EDT (23:55 UTC)
Expired: Jun 21, 2021, 8:45 PM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Mercer County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 17 km from the middle of the area, began a volume at 23:56 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

Brookhaven, NY (KOKX), launched 12:00Z, 11.9 hours before the alert went out and 172 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: 171 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 802 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

454 
WWUS81 KPHI 212355
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
755 PM EDT Mon Jun 21 2021

NJZ012-013-015-017>022-025>027-PAZ071-104-106-220045-
Coastal Atlantic-Camden-Coastal Ocean-Atlantic-Mercer-Southeastern
Burlington-Northwestern Burlington-Cumberland-Ocean-Western
Monmouth-Middlesex-Gloucester-Lower Bucks-Eastern
Montgomery-Philadelphia-
755 PM EDT Mon Jun 21 2021

...A LINE OF SHOWERS WILL AFFECT ATLANTIC...NORTHEASTERN
CUMBERLAND...OCEAN...CAMDEN...MERCER...EASTERN GLOUCESTER...
BURLINGTON...SOUTHWESTERN MONMOUTH...SOUTHERN MIDDLESEX...EAST
CENTRAL MONTGOMERY...SOUTHEASTERN BUCKS AND NORTHEASTERN PHILADELPHIA
COUNTIES...

At 755 PM EDT, radar indicated showers were located along a line
extending from Ivyland to Cumberland. Movement was east at 40 mph.

Wind gusts up to 45 mph are possible with these showers.

Locations impacted include...
Philadelphia, Toms River, Trenton, Camden, Vineland, Gloucester City,
Lakewood, Cherry Hill, Old Bridge, Bensalem, Jackson, East Brunswick,
Evesham, Mount Laurel, Manalapan, Ewing, Willingboro, Voorhees,
Medford and Barnegat.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 9.
 Pennsylvania Turnpike between mile markers 342 and 359.
 Interstate 95 in Pennsylvania between mile markers 24 and 40.
 Interstate 195 in New Jersey between mile markers 0 and 27.
 Interstate 295 in New Jersey between mile markers 28 and 76.
 Garden State Parkway between mile markers 39 and 85.
 Atlantic City Expressway between mile markers 10 and 44.

LAT...LON 4043 7429 3993 7418 3942 7424 3945 7502
      4022 7516 4034 7481
TIME...MOT...LOC 2355Z 262DEG 33KT 4019 7507 3939 7493 

$$

NC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 4:35 AM EDT	Heat Advisory	PHI	Burlington, Camden, Gloucester, Mercer	15 hr
Jun 21, 7:12 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	48 min
Jun 21, 7:24 PM EDT	Special Marine Warning	PHI		66 min
Jun 21, 7:38 PM EDT	Severe Thunderstorm Warning	PHI	Warren	52 min
Jun 21, 7:43 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	47 min
Jun 20, 9:27 PM EDT	Special Weather Statement	PHI	Schuylkill	33 min
Jun 20, 9:55 PM EDT	Special Weather Statement	PHI	Lebanon	35 min
Jun 20, 10:04 PM EDT	Areal Flood Advisory	PHI	Berks	86 min
Jun 20, 10:27 PM EDT	Special Weather Statement	PHI	Berks	33 min
Jun 21, 6:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	52 min
Jun 21, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	54 min
Jun 21, 7:02 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Northampton	43 min
Jun 21, 6:47 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	58 min

Nearby

Special Weather Statements in New Jersey, 2021 Every special weather statement in 2021

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.