Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 47, NWS Philadelphia/Mount Holly

June 19, 20174 states

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 19, 2017, 4:07 PM EDT for 4 states. It was in force for 38 min. 3 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: Jun 19, 2017, 4:07 PM EDT (20:07 UTC)
Expired: Jun 19, 2017, 4:45 PM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 20:06 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
Jun 19, 4:11 PM EDT	TSTM WND DMG	Chippendale, MD	TREE DOWN ON INTERSECTION OF LEEDS ROAD AND WALNUT GROVE ROAD
Jun 19, 4:43 PM EDT	TSTM WND GST 55	Aston Arms, PA
Jun 19, 4:47 PM EDT	TSTM WND DMG	Logan Twp, NJ	SEVERAL TREES DOWN

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 19, 11:13 AM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.1 hours before the alert went out and 181 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: 448 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1049 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

374 
WUUS51 KPHI 192007 RRA
SVRPHI
DEC003-MDC015-NJC015-033-PAC045-192045-
/O.NEW.KPHI.SV.W.0047.170619T2007Z-170619T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
407 PM EDT MON JUN 19 2017

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern New Castle County in northern Delaware...
  Northeastern Cecil County in northeastern Maryland...
  Northern Salem County in southern New Jersey...
  Northwestern Gloucester County in southern New Jersey...
  Southern Delaware County in southeastern Pennsylvania...

* Until 445 PM EDT

* At 407 PM EDT, a severe thunderstorm was located over Pleasant
  Hill, or 7 miles northwest of Elkton, moving east at 50 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to trees and power lines. 

* Locations impacted include...
  Wilmington, Newark, Elkton, Calvert, Chester, West Deptford,
  Glassboro, Pennsville, Carneys Point, Folcroft, Elsmere, Paulsboro,
  New Castle, Penns Grove, North East, Woodstown, National Park,
  Swedesboro, Newport and Arden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

In addition to large hail and damaging winds...frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember...if you can hear thunder...you are close
enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3972 7577 3977 7574 3982 7568 3990 7526
      3987 7526 3987 7519 3963 7514 3958 7597
      3972 7601
TIME...MOT...LOC 2007Z 258DEG 45KT 3969 7589 

HAIL...<.75IN
WIND...60MPH
 
$$

Meola

1 follow-up statement

846 
WWUS51 KPHI 192041
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
441 PM EDT MON JUN 19 2017

DEC003-MDC015-NJC015-033-PAC045-192051-
/O.EXP.KPHI.SV.W.0047.000000T0000Z-170619T2045Z/
New Castle DE-Cecil MD-Salem NJ-Gloucester NJ-Delaware PA-
441 PM EDT MON JUN 19 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN NEW CASTLE...
NORTHEASTERN CECIL...NORTHERN SALEM...NORTHWESTERN GLOUCESTER AND
SOUTHERN DELAWARE COUNTIES WILL EXPIRE AT 445 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire. However gusty winds 
and heavy rain are still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 800 PM EDT for
northern Delaware...northeastern Maryland...southern New Jersey...and
southeastern Pennsylvania.

LAT...LON 3972 7577 3977 7574 3982 7568 3990 7526
      3987 7526 3987 7519 3963 7514 3958 7597
      3972 7601
TIME...MOT...LOC 2041Z 258DEG 45KT 3978 7536 

$$

Meola

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 12:24 PM EDT	Special Weather Statement	PHI	Monroe	21 min
Jun 19, 12:44 PM EDT	Special Weather Statement	PHI	Carbon	31 min
Jun 19, 12:46 PM EDT	Special Weather Statement	PHI	Berks	29 min
Jun 19, 12:55 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	50 min
Jun 19, 1:25 PM EDT	Special Weather Statement	PHI	Lehigh	35 min
Jun 19, 1:29 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Jun 19, 1:42 PM EDT	Special Weather Statement	PHI	Berks	63 min
Jun 19, 2:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks	52 min
Jun 19, 2:20 PM EDT	Special Weather Statement	PHI	Northampton	40 min
Jun 19, 2:25 PM EDT	Special Weather Statement	PHI	Berks	50 min
Jun 19, 2:38 PM EDT	Special Weather Statement	PHI	Philadelphia	22 min
Jun 19, 2:43 PM EDT	Special Weather Statement	PHI	Berks, Lehigh, Northampton	47 min
Jun 19, 2:49 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Montgomery, Northampton	41 min
Jun 19, 2:53 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	52 min
Jun 19, 2:57 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	48 min
Jun 19, 3:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	52 min
Jun 19, 3:17 PM EDT	Flash Flood Warning	PHI	Monroe	3 hr
Jun 19, 3:24 PM EDT	Flash Flood Warning	PHI	Carbon, Lehigh, Monroe, Northampton	3 hr
Jun 19, 3:25 PM EDT	Special Weather Statement	PHI	Chester	50 min
Jun 19, 3:35 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Jun 19, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Monroe, Northampton	25 min
Jun 19, 3:53 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	37 min
Jun 19, 3:56 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	49 min
Jun 19, 4:07 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	38 min
Jun 19, 4:34 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	41 min
Jun 19, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	51 min
Jun 19, 4:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	52 min
Jun 19, 4:42 PM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Jun 19, 4:59 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	46 min
Jun 19, 5:14 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle, Sussex	3 hr
Jun 19, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	62 min
Jun 19, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	67 min
Jun 19, 6:17 PM EDT	Tornado Warning	PHI	Kent, Sussex	16 min
Jun 19, 6:52 PM EDT	Special Weather Statement	PHI	Sussex	23 min
Jun 19, 7:30 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	45 min
Jun 19, 7:34 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Jun 19, 12:03 PM EDT	Special Weather Statement	PHI	Sussex	27 min
Jun 19, 2:33 PM EDT	Areal Flood Advisory	PHI	Sussex	4 hr
Jun 19, 3:45 PM EDT	Special Weather Statement	PHI	Sussex	15 min
Jun 19, 3:54 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Morris, Somerset, Warren	3 hr
Jun 19, 4:24 PM EDT	Special Marine Warning	PHI		36 min
Jun 19, 4:28 PM EDT	Special Weather Statement	PHI	Sussex	17 min
Jun 19, 4:51 PM EDT	Special Weather Statement	PHI	Gloucester	39 min
Jun 19, 4:58 PM EDT	Special Weather Statement	PHI	Union	32 min
Jun 19, 5:05 PM EDT	Special Marine Warning	PHI		55 min
Jun 19, 5:06 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth, Somerset	3 hr
Jun 19, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	45 min
Jun 19, 5:41 PM EDT	Special Marine Warning	PHI		64 min
Jun 19, 5:44 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more	3 hr
Jun 19, 5:46 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Mercer, Middlesex, Monmouth, Ocean	3 hr
Jun 19, 5:52 PM EDT	Special Weather Statement	PHI	Atlantic, Monmouth, Ocean	38 min
Jun 19, 5:53 PM EDT	Special Marine Warning	PHI		67 min
Jun 19, 6:01 PM EDT	Special Weather Statement	PHI	Cumberland	44 min
Jun 19, 6:13 PM EDT	Special Marine Warning	PHI		92 min
Jun 19, 6:47 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	43 min
Jun 19, 7:08 PM EDT	Special Marine Warning	PHI		52 min
Jun 19, 7:20 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Ocean	25 min
Jun 19, 7:33 PM EDT	Special Marine Warning	PHI		57 min
Jun 19, 3:45 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent, Queen Anne's	3 hr
Jun 19, 4:17 PM EDT	Special Weather Statement	PHI	Cecil, Kent, Queen Anne's	58 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2017 Severe Thunderstorm Warnings in Pennsylvania, 2017 Severe Thunderstorm Warnings in Delaware, 2017 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.