Alert archive / New Jersey / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

December 16, 2018Atlantic County, Cape May County, Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Dec 16, 2018, 1:39 AM EST for Atlantic County, Cape May County, Cumberland County, New Jersey. It was in force for 51 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 16, 2018, 1:39 AM EST (06:39 UTC)
Expired: Dec 16, 2018, 2:30 AM EST
In force: 51 min
Issued by: NWS Philadelphia/Mount Holly

Counties Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ

The radar

The Philadelphia radar (KDIX), 72 km from the middle of the area, began a volume at 06:42 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.

What was reported inside it

Time	Report	Where	Remark
Dec 16, 2:30 AM EST	MARINE TSTM WIND 40	Stone Harbor, NJ	MEASURED BY HADS GAUGE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 6.7 hours before the alert went out and 168 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 436 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 382 m²/s²
0-3 km storm-relative helicity: 489 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

263 
WWUS81 KPHI 160639
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
139 AM EST SUN DEC 16 2018

NJZ021>025-160730-
Coastal Atlantic-Cumberland-Atlantic-Atlantic Coastal Cape May-Cape
May-
139 AM EST SUN DEC 16 2018

...A STRONG THUNDERSTORM WILL AFFECT ATLANTIC...CUMBERLAND AND CAPE
MAY COUNTIES...

At 139 AM EST, a strong thunderstorm was located over West Cape May,
or over Cape May, moving northeast at 30 mph.

Winds up to 50 mph are possible with this storm.

Locations impacted include...
Vineland, Atlantic City, Millville, Ocean City, Cape May, Cumberland,
Pleasantville, Hammonton, Somers Point, Ventnor City, Brigantine,
Northfield, Absecon, Margate City, Buena, Egg Harbor City, Laurel
Lake, Weymouth, Woodbine and Sea Isle City.

LAT...LON 3932 7450 3933 7468 3927 7459 3929 7455
      3893 7489 3893 7497 3917 7490 3922 7503
      3918 7515 3928 7525 3956 7505 3951 7499
      3966 7482 3952 7441 3941 7440 3944 7435
      3948 7438 3948 7431 3947 7430
TIME...MOT...LOC 0639Z 214DEG 27KT 3896 7492 

$$

CMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 16, 12:38 AM EST	Special Marine Warning	PHI		112 min
Dec 16, 1:29 AM EST	Coastal Flood Advisory	PHI	Ocean	16 hr
Dec 16, 2:22 AM EST	Special Weather Statement	PHI	Atlantic, Cape May	53 min
Dec 16, 2:24 AM EST	Special Marine Warning	PHI		96 min
Dec 16, 3:20 AM EST	Wind Advisory	PHI	Monmouth, Ocean	10 hr
Dec 16, 12:01 PM EST	Small Craft Advisory	PHI		42 hr
Dec 16, 12:28 PM EST	Areal Flood Advisory	PHI	Salem	4 hr
Dec 16, 3:56 PM EST	Gale Watch	PHI		12 hr
Dec 16, 5:09 PM EST	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	3 hr
Dec 16, 7:25 AM EST	River Flood Warning	PHI	Chester	96 min
Dec 16, 3:41 PM EST	Areal Flood Warning	PHI	Chester	4 hr
Dec 16, 12:59 AM EST	Special Weather Statement	PHI	Sussex	46 min

Nearby

Special Weather Statements in New Jersey, 2018 Every special weather statement in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.