Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

August 9, 2021Atlantic County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 9, 2021, 4:45 PM EDT for Atlantic County, New Jersey. It was in force for 30 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 9, 2021, 4:45 PM EDT (20:45 UTC)
Expired: Aug 9, 2021, 5:15 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.50 in
Wind: 40

County Atlantic County, NJ

The radar

The Philadelphia radar (KDIX), 66 km from the middle of the area, began a volume at 20:47 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, 8.8 hours before the alert went out and 180 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: 927 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 869 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

656 
WWUS81 KPHI 092045
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
445 PM EDT Mon Aug 9 2021
 
NJZ017-021-022-092115-
Cumberland NJ-Atlantic NJ-Gloucester NJ-
445 PM EDT Mon Aug 9 2021

...A strong thunderstorm will impact portions of southwestern
Atlantic, northeastern Cumberland and southeastern Gloucester
Counties through 515 PM EDT...

At 445 PM EDT, Doppler radar was tracking a strong thunderstorm over
Buena, or near Vineland, moving east at 5 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Vineland, Millville, Cumberland, Buena, Estell Manor, Newfield,
Dorothy, Mizpah, Folsom and Collings Lakes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3936 7498 3952 7506 3962 7490 3961 7488
      3962 7486 3941 7473
TIME...MOT...LOC 2045Z 248DEG 5KT 3949 7494 

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 3:43 PM EDT	Excessive Heat Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 4 more	12 hr
Aug 9, 4:36 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	104 min
Aug 9, 5:40 PM EDT	Areal Flood Advisory	PHI	Camden, Gloucester	82 min
Aug 9, 6:10 PM EDT	Special Weather Statement	PHI	Burlington	35 min
Aug 9, 6:37 PM EDT	Special Weather Statement	PHI	Mercer	38 min
Aug 9, 5:12 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	85 min
Aug 9, 5:34 PM EDT	Special Weather Statement	PHI	Philadelphia	26 min
Aug 9, 6:24 PM EDT	Special Weather Statement	PHI	Lehigh	36 min
Aug 9, 6:29 PM EDT	Areal Flood Advisory	PHI	Berks, Montgomery	70 min
Aug 9, 6:49 PM EDT	Special Weather Statement	PHI	Montgomery	26 min
Aug 9, 7:14 PM EDT	Special Weather Statement	PHI	Carbon	31 min
Aug 9, 2:10 PM EDT	Special Weather Statement	PHI	Sussex	50 min
Aug 9, 2:41 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle, Sussex	3 hr
Aug 9, 3:01 PM EDT	Flash Flood Warning	PHI	Kent, Sussex	2 hr
Aug 9, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Kent	40 min
Aug 9, 4:59 PM EDT	Flash Flood Warning	PHI	Kent	79 min
Aug 9, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Kent	20 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.