Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 278, NWS Philadelphia/Mount Holly

August 28, 20204 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 28, 2020, 4:29 PM EDT for 4 counties in New Jersey. It was in force for 61 min. 6 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: Aug 28, 2020, 4:29 PM EDT (20:29 UTC)
Expired: Aug 28, 2020, 5:30 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 43 km from the middle of the area, began a volume at 20:29 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
Aug 28, 4:47 PM EDT	TSTM WND DMG	Rancocas, NJ	DOWNED POWER LINES NEAR EVERGREEN DRIVE. TIME ESTIMATED FROM RADAR.
Aug 28, 4:55 PM EDT	TSTM WND DMG	1 Ne Bordentown, NJ	DOWNED TREES AND WIRES NEAR AMBOY ROAD AND U.S. HIGHWAY 206. TIME ESTIMATED FROM RADAR.
Aug 28, 4:55 PM EDT	TSTM WND DMG	2 Wsw Yardville, NJ	DOWNED POWER LINES NEAR GROVEVILLE ROAD. TIME ESTIMATED FROM RADAR.
Aug 28, 4:57 PM EDT	TSTM WND DMG	1 Nne Columbus, NJ	TREES CAUSED POWER OUTAGE AT US 206 AND MANSFIELD RD. EAST. TIME ESTIMATED FROM RADAR.
Aug 28, 5:06 PM EDT	TSTM WND DMG	1 Nw Allentown, NJ	DOWNED POWER LINES NEAR CIRCLE DRIVE IN ALLENTOWN. TIME ESTIMATED FROM RADAR.
Aug 28, 5:06 PM EDT	TSTM WND DMG	North Hanover Twp, NJ	DOWNED TREES AND WIRES NEAR THE ELLISDALE-CROSSWICKS ROAD AND PROVINCE LINE ROAD INTERSECTION. TIME ESTIMATED FROM RADAR.

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
Aug 28, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.5 hours before the alert went out and 195 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: 1018 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

121 
WUUS51 KPHI 282029
SVRPHI
NJC005-007-015-021-282130-
/O.NEW.KPHI.SV.W.0278.200828T2029Z-200828T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
429 PM EDT Fri Aug 28 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Camden County in southern New Jersey...
  Southern Mercer County in central New Jersey...
  North central Gloucester County in southern New Jersey...
  Northern Burlington County in southern New Jersey...

* Until 530 PM EDT.

* At 429 PM EDT, severe thunderstorms were located along a line 
  extending from Newtown to Bryn Mawr in Pennsylvania, moving 
  southeast at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Philadelphia, Trenton, Camden, Gloucester City, Cherry Hill,
  Evesham, Mount Laurel, Ewing, Willingboro, Deptford, Voorhees,
  Medford, West Deptford, Glassboro, Lindenwold, Lumberton, Florence,
  Bellmawr, Woodbury and Burlington.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 8.
 Pennsylvania Turnpike near mile marker 359.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 195 in New Jersey between mile markers 0 and 8.
 Interstate 295 in New Jersey between mile markers 18 and 65, and
between mile markers 72 and 76.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Atlantic City Expressway between mile markers 42 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

&&

LAT...LON 3967 7521 3985 7527 3988 7515 3996 7513
      3998 7508 4005 7497 4008 7487 4013 7482
      4012 7478 4015 7472 4022 7477 4025 7484
      4031 7489 4033 7486 4019 7456 4018 7461
      3994 7448
TIME...MOT...LOC 2029Z 303DEG 29KT 4024 7496 4003 7529 

HAIL...1.00IN
WIND...60MPH
 
$$

Iovino

1 follow-up statement

557 
WWUS51 KPHI 282058
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
458 PM EDT Fri Aug 28 2020

NJC005-007-015-021-282130-
/O.CON.KPHI.SV.W.0278.000000T0000Z-200828T2130Z/
Camden NJ-Mercer NJ-Gloucester NJ-Burlington NJ-
458 PM EDT Fri Aug 28 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHWESTERN CAMDEN...SOUTHEASTERN MERCER...NORTH CENTRAL
GLOUCESTER AND NORTHERN BURLINGTON COUNTIES...

At 457 PM EDT, severe thunderstorms were located along a line
extending from near Bordentown to Golden Triangle, moving southeast
at 35 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Philadelphia, Trenton, Camden, Gloucester City, Cherry Hill, Evesham,
Mount Laurel, Ewing, Willingboro, Deptford, Voorhees, Medford, West
Deptford, Glassboro, Lindenwold, Lumberton, Florence, Bellmawr,
Woodbury and Burlington.

This includes the following highways...
 New Jersey Turnpike between exits 3 and 8.
 Pennsylvania Turnpike near mile marker 359.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 195 in New Jersey between mile markers 0 and 8.
 Interstate 295 in New Jersey between mile markers 18 and 65.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Atlantic City Expressway between mile markers 42 and 44.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

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

&&

LAT...LON 3967 7521 3985 7527 3988 7515 3996 7513
      3998 7508 4005 7497 4008 7487 4013 7482
      4012 7478 4015 7472 4022 7477 4024 7482
      4028 7476 4019 7456 4018 7461 3994 7448
TIME...MOT...LOC 2057Z 303DEG 29KT 4012 7472 3991 7505 

HAIL...0.75IN
WIND...70MPH
 
$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 8:13 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset, Warren	47 min
Aug 27, 8:24 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	51 min
Aug 27, 8:29 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	46 min
Aug 27, 8:55 PM EDT	Special Marine Warning	PHI		95 min
Aug 27, 9:13 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	47 min
Aug 27, 9:28 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean, Somerset	47 min
Aug 28, 3:05 PM EDT	Special Marine Warning	PHI		85 min
Aug 28, 3:41 PM EDT	Special Weather Statement	PHI	Salem	34 min
Aug 28, 3:52 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	53 min
Aug 28, 3:53 PM EDT	Special Marine Warning	PHI		67 min
Aug 28, 4:07 PM EDT	Special Marine Warning	PHI		53 min
Aug 28, 4:17 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	43 min
Aug 28, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Cumberland, Gloucester, Salem	66 min
Aug 28, 4:49 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	56 min
Aug 28, 4:55 PM EDT	Special Marine Warning	PHI		95 min
Aug 28, 5:13 PM EDT	Special Marine Warning	PHI		92 min
Aug 28, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	47 min
Aug 28, 5:37 PM EDT	Special Marine Warning	PHI		83 min
Aug 28, 5:51 PM EDT	Special Marine Warning	PHI		84 min
Aug 28, 6:53 PM EDT	Special Marine Warning	PHI		64 min
Aug 28, 7:55 PM EDT	Special Marine Warning	PHI		65 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Every severe thunderstorm warning in 2020

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.