Alert archive / New Jersey / Special Weather Statements in 2017

Special Weather Statement, NWS Philadelphia/Mount Holly

July 19, 2017Atlantic County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 19, 2017, 4:20 PM EDT for Atlantic County, New Jersey. It was in force for 25 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 19, 2017, 4:20 PM EDT (20:20 UTC)
Expired: Jul 19, 2017, 4:45 PM EDT
In force: 25 min
Issued by: NWS Philadelphia/Mount Holly

County Atlantic County, NJ

The radar

The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 20:22 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, 8.3 hours before the alert went out and 171 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: 685 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

220 
WWUS81 KPHI 192020
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
420 PM EDT WED JUL 19 2017

NJZ022>025-192045-
Coastal Atlantic-Atlantic-Atlantic Coastal Cape May-Cape May-
420 PM EDT WED JUL 19 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL ATLANTIC AND
NORTHEASTERN CAPE MAY COUNTIES...

At 420 PM EDT, a strong thunderstorm was located over Somers Point,
or near Ocean City, moving southeast at 10 mph.

Winds up to 40 mph are possible with this storm.

Locations impacted include...
Atlantic City, Ocean City, Pleasantville, Somers Point, Ventnor City,
Northfield, Margate City, Estell Manor, Longport, Corbin City,
Beesleys Point, English Creek, Marmora and Linwood.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

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 3935 7445 3930 7455 3931 7465 3933 7468
      3929 7465 3927 7459 3929 7460 3929 7455
      3924 7462 3933 7472 3941 7462 3938 7452
      3934 7451 3936 7449
TIME...MOT...LOC 2020Z 310DEG 7KT 3932 7459 

$$

Meola

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 1:04 PM EDT	Special Weather Statement	PHI	Ocean	26 min
Jul 19, 1:30 PM EDT	Special Weather Statement	PHI	Atlantic	30 min
Jul 19, 1:37 PM EDT	Areal Flood Advisory	PHI	Ocean	4 hr
Jul 19, 2:50 PM EDT	Special Weather Statement	PHI	Atlantic	25 min
Jul 19, 2:58 PM EDT	Excessive Heat Warning	PHI	Burlington, Camden, Gloucester, Mercer	53 hr
Jul 19, 3:22 PM EDT	Special Weather Statement	PHI	Atlantic	23 min
Jul 19, 3:46 PM EDT	Special Weather Statement	PHI	Atlantic	14 min
Jul 19, 3:56 PM EDT	Areal Flood Advisory	PHI	Atlantic	4 hr
Jul 19, 6:36 PM EDT	Special Weather Statement	PHI	Atlantic	54 min
Jul 19, 5:32 PM EDT	Special Weather Statement	PHI	Berks	58 min
Jul 19, 7:26 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	64 min
Jul 19, 2:48 PM EDT	Special Weather Statement	PHI	Sussex	57 min
Jul 19, 3:07 PM EDT	Special Weather Statement	PHI	Kent	38 min
Jul 19, 3:21 PM EDT	Special Weather Statement	PHI	Kent	24 min
Jul 19, 3:37 PM EDT	Special Weather Statement	PHI	Kent	38 min
Jul 19, 3:42 PM EDT	Areal Flood Advisory	PHI	Kent	4 hr
Jul 19, 5:54 PM EDT	Special Weather Statement	PHI	Sussex	66 min

Nearby

Special Weather Statements in New Jersey, 2017 Every special weather statement 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.