Alert archive / New Jersey / Special Weather Statements in 2016

Special Weather Statement, NWS Philadelphia/Mount Holly

July 18, 20164 states

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 18, 2016, 4:04 PM EDT for 4 states. It was in force for 56 min. 10 reports 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: Jul 18, 2016, 4:04 PM EDT (20:04 UTC)
Expired: Jul 18, 2016, 5:00 PM EDT
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Philadelphia County, PA

The radar

The Dover AFB radar (KDOX), 87 km from the middle of the area, began a volume at 20:04 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
Jul 18, 4:10 PM EDT	TSTM WND DMG	Pike Creek, DE	TREE LIMBS DOWN
Jul 18, 4:18 PM EDT	TSTM WND GST 50	Stanton, DE
Jul 18, 4:20 PM EDT	TSTM WND DMG	Newport, DE	SOME TREES AND POWER LINES DOWN. TIME ESTIMATED FROM RADAR.
Jul 18, 4:25 PM EDT	TSTM WND DMG	Wilmington Manor, DE	LARGE TREE DOWN. TIME ESTIMATED FROM RADAR.
Jul 18, 4:26 PM EDT	TSTM WND GST 53	New Castle County Airpo, DE
Jul 18, 4:26 PM EDT	TSTM WND GST 54	New Castle County Airpo, DE
Jul 18, 4:28 PM EDT	TSTM WND DMG	2 Wsw Wilmington, DE	LARGE TREE COMPLETELY TOPPLED OVER AND ONTO A DRIVEWAY AND ROAD. THIS OCCURRED IN THE RICHARDSON PARK AREA. TIME ESTIMATED BASED ON RADAR.
Jul 18, 4:30 PM EDT	TSTM WND DMG	Wilmington, DE	SEVERAL LARGE TREE LIMBS SNAPPED OFF.
Jul 18, 4:30 PM EDT	TSTM WND GST 47	Blackwood, NJ
Jul 18, 4:30 PM EDT	TSTM WND GST 50	Wilmington, DE

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.1 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: 200 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1480 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 4 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.

286 
WWUS81 KPHI 182004
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
404 PM EDT MON JUL 18 2016
 
DEZ001-MDZ008-012-NJZ016>019-027-PAZ070-071-102-182100-
NEW CASTLE-CECIL-KENT-SALEM-SOUTHEASTERN BURLINGTON-NORTHWESTERN
BURLINGTON-CAMDEN-GLOUCESTER-PHILADELPHIA-EASTERN CHESTER-DELAWARE-
404 PM EDT MON JUL 18 2016

...THUNDERSTORMS ACROSS METRO PHILADELPHIA...SOUTHERN NEW
JERSEY AND NORTHERN DELMARVA REGION... 
...

AT 402 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM NEAR CENTER CITY PHILADELPHIA TO NEAR WOODLAWN...AND
MOVING EAST AT 20 MPH.

WIND GUSTS UP TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.

LOCATIONS IMPACTED INCLUDE...
PHILADELPHIA...CAMDEN...WILMINGTON...NEWARK...MIDDLETOWN...ELKTON...
GLOUCESTER CITY...EVESHAM...MOUNT LAUREL...CHESTER...DEPTFORD...
VOORHEES...WEST DEPTFORD...GLASSBORO...LINDENWOLD...PENNSVILLE...
BELLMAWR...YEADON... WOODBURY AND PITMAN.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

LAT...LON 4005 7504 3978 7469 3949 7540 3946 7554
      3957 7551 3962 7557 3972 7551 3963 7561
      3959 7560 3960 7558 3946 7559 3943 7556
      3926 7597 3937 7607 3943 7599 3952 7598
      3955 7608 3963 7615 3964 7614
TIME...MOT...LOC 2002Z 292DEG 19KT 3998 7518 3962 7611 
$$

PO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 4:04 AM EDT	Small Craft Advisory	PHI		12 hr
Jul 18, 2:42 PM EDT	Special Weather Statement	PHI	Sussex	63 min
Jul 18, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	39 min
Jul 18, 3:25 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	50 min
Jul 18, 3:41 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	49 min
Jul 18, 4:07 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	38 min
Jul 18, 4:14 PM EDT	Severe Thunderstorm Warning	PHI	Salem	46 min
Jul 18, 4:15 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	2 hr
Jul 18, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Salem	38 min
Jul 18, 4:47 PM EDT	Special Marine Warning	PHI		88 min
Jul 18, 4:47 PM EDT	Special Weather Statement	PHI	Burlington, Camden	43 min
Jul 18, 5:00 PM EDT	Special Marine Warning	PHI		60 min
Jul 18, 5:07 PM EDT	Special Marine Warning	PHI		83 min
Jul 18, 5:22 PM EDT	Special Weather Statement	PHI	Cumberland, Salem	53 min
Jul 18, 5:49 PM EDT	Special Marine Warning	PHI		116 min
Jul 18, 5:51 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	24 min
Jul 18, 6:05 PM EDT	Special Marine Warning	PHI		85 min
Jul 18, 6:23 PM EDT	Special Marine Warning	PHI		97 min
Jul 18, 7:43 PM EDT	Special Weather Statement	PHI	Sussex	47 min
Jul 18, 12:58 PM EDT	Special Weather Statement	PHI	Carbon	62 min
Jul 18, 1:48 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	57 min
Jul 18, 1:52 PM EDT	Special Weather Statement	PHI	Chester	38 min
Jul 18, 2:28 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Northampton	47 min
Jul 18, 3:17 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery, Philadelphia	43 min
Jul 18, 5:18 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	57 min

Nearby

Special Weather Statements in New Jersey, 2016 Special Weather Statements in Pennsylvania, 2016 Special Weather Statements in Maryland, 2016 Every special weather statement in 2016

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.