Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

August 30, 2021Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 30, 2021, 5:56 PM EDT for Cape May County, New Jersey. It was in force for 49 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 30, 2021, 5:56 PM EDT (21:56 UTC)
Expired: Aug 30, 2021, 6:45 PM EDT
In force: 49 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.00 in
Wind: 40

County Cape May County, NJ

The radar

The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 21:57 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, 9.9 hours before the alert went out and 134 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: 392 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 791 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

458 
WWUS81 KPHI 302156
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
556 PM EDT Mon Aug 30 2021
 
NJZ021-023-024-302245-
Cumberland NJ-Atlantic Coastal Cape May NJ-Cape May NJ-
556 PM EDT Mon Aug 30 2021

...A strong thunderstorm will impact portions of southeastern
Cumberland and Cape May Counties through 645 PM EDT...

At 556 PM EDT, Doppler radar was tracking a strong thunderstorm near
Fortesque, or 16 miles south of Millville, moving east at 20 mph.

HAZARD...Wind gusts up to 40 mph. Frequent cloud to ground lightning 
         is occurring with this storm and it is headed for the 
         Cape May County beaches.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Ocean City, Cape May, North Wildwood, Wildwood Crest, Woodbine, Sea
Isle City, Avalon, West Cape May, Stone Harbor, Cape May Court House,
Leesburg, Scotch Bonnet, Seaville, Dennisville, Strathmere, Eldora,
North Cape May, Port Norris, Diamond Beach and Green Creek.

This includes Garden State Parkway between mile markers 0 and 22.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3909 7527 3929 7506 3922 7458 3898 7477
      3889 7492
TIME...MOT...LOC 2156Z 282DEG 16KT 3915 7514 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 5:00 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	71 hr
Aug 30, 5:44 AM EDT	Dense Fog Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 3 more	3 hr
Aug 30, 4:48 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	27 min
Aug 30, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	44 min
Aug 30, 5:21 PM EDT	Special Weather Statement	PHI	Atlantic	24 min
Aug 30, 5:26 PM EDT	Special Marine Warning	PHI		64 min
Aug 30, 5:44 PM EDT	Special Marine Warning	PHI		61 min
Aug 30, 5:53 PM EDT	Special Weather Statement	PHI	Atlantic	22 min
Aug 30, 6:16 PM EDT	Special Marine Warning	PHI		89 min
Aug 30, 6:41 PM EDT	Special Weather Statement	PHI	Cape May	34 min
Aug 30, 7:20 PM EDT	Special Weather Statement	PHI	Cape May	25 min
Aug 30, 7:31 PM EDT	Special Marine Warning	PHI		59 min
Aug 30, 3:44 PM EDT	Special Weather Statement	PHI	New Castle	31 min
Aug 30, 4:14 PM EDT	Special Weather Statement	PHI	Kent	31 min
Aug 30, 6:02 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	28 min
Aug 30, 3:46 PM EDT	Special Weather Statement	PHI	Kent	29 min
Aug 30, 4:27 PM EDT	Special Weather Statement	PHI	Kent	33 min
Aug 30, 4:54 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	51 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.