Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 23, NWS Philadelphia/Mount Holly

April 9, 20208 counties in New Jersey; Bucks County, Delaware County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 9, 2020, 1:33 PM EDT for 8 counties in New Jersey; Bucks County, Delaware County, Philadelphia County, Pennsylvania. It was in force for 42 min. 25 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: Apr 9, 2020, 1:33 PM EDT (17:33 UTC)
Expired: Apr 9, 2020, 2:15 PM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 10 km from the middle of the area, began a volume at 17:35 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
Apr 9, 1:35 PM EDT	TSTM WND DMG	1 Ssw Florence, NJ	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 SSW FLORENCE. DOWNED TREE BLOCKING THE RIGHT LANE OF WEST BOUND NJ TURNPIKE. TIME ESTIMATED FROM RADAR.
Apr 9, 1:35 PM EDT	TSTM WND DMG	Gloucester City, NJ	A SECTION OF A ROOF WAS PEELED OFF WITH REPORTS OF LARGE BRANCHES SCATTERED ABOUT IN THE CITY.
Apr 9, 1:35 PM EDT	TSTM WND GST 58	1 Ssw Palmyra, NJ	NJWXNET MEASURED GUST.
Apr 9, 1:35 PM EDT	TSTM WND GST 60	Gloucester City, NJ	WINDS OF 50-60 MPH REPORTED IN GLOUCESTER CITY.
Apr 9, 1:37 PM EDT	TSTM WND DMG	1 Ese Beverly, NJ	FENCING BLOWN OVER AND SEVERAL LARGE TREE LIMBS DOWN AT A RESIDENCE. TIME ESTIMATED FROM RADAR.
Apr 9, 1:37 PM EDT	TSTM WND DMG	2 Wsw Hainesport, NJ	PHOTO OF A HARDWOOD TREE DOWN.
Apr 9, 1:39 PM EDT	TSTM WND DMG	1 Se Ellisburg, NJ	DOWNED TREE ON INTERSTATE 295 SOUTH OF EXIT 34. LANE RESTRICTIONS WERE REQUIRED. TIME ESTIMATED FROM RADAR.
Apr 9, 1:40 PM EDT	TSTM WND DMG	1 Nnw Rancocas, NJ	ROAD CLOSED DUE TO TREES DOWN ACROSS THE ROAD. TIME ESTIMATED FROM RADAR.
Apr 9, 1:40 PM EDT	TSTM WND GST 50	Delran, NJ
Apr 9, 1:40 PM EDT	TSTM WND GST 53	2 Sw Rancocas, NJ	NJWXNET MEASURED GUST.
Apr 9, 1:42 PM EDT	TSTM WND DMG	1 S Rancocas, NJ	DOWNED TREE ON INTERSTATE 295 NORTH OF EXIT 43. LANE RESTRICTIONS WERE REQUIRED. TIME ESTIMATED FROM RADAR.
Apr 9, 1:42 PM EDT	HAIL 0.25	2 Sse Yardville, NJ
Apr 9, 1:45 PM EDT	TSTM WND DMG	2 S Rancocas, NJ	POWER LINE DOWN IN MOUNT LAUREL ON CORAL AVENUE.
Apr 9, 1:45 PM EDT	TSTM WND DMG	2 Wsw Hainesport, NJ	LARGE BRANCH DOWN IN MOUNT LAUREL ON MARNE HIGHWAY NEAR CREEK ROAD.
Apr 9, 1:45 PM EDT	TSTM WND DMG	Allentown, NJ	LARGE TREE UPROOTED. TIME ESTIMATED FROM RADAR.
Apr 9, 1:45 PM EDT	TSTM WND GST 56	1 Ese Lumberton Twp, NJ	CWOP REPORT.
Apr 9, 1:45 PM EDT	HAIL 0.75	Mullica Hill, NJ	REPORT FROM MPING: DIME (0.75 IN.).
Apr 9, 1:46 PM EDT	TSTM WND DMG	Lumberton, NJ	SEVERAL LARGE TREE LIMBS DOWNED WITH SOME MINOR PROPERTY DAMAGE AT A RESIDENCE. TIME ESTIMATED FROM RADAR.
Apr 9, 1:50 PM EDT	TSTM WND GST 60	Sewell, NJ
Apr 9, 1:57 PM EDT	TSTM WND GST 56	Mcguire Afb (Kwri), NJ
Apr 9, 2:03 PM EDT	TSTM WND GST 59	1 S Eastwick, PA	ITWS MEASURED GUST.
Apr 9, 2:04 PM EDT	HAIL 0.25	2 S Howell, NJ
Apr 9, 2:10 PM EDT	TSTM WND GST 64	Ocean County Airport (K, NJ
Apr 9, 2:14 PM EDT	HAIL 0.25	Spring Lake Heights, NJ
Apr 9, 2:14 PM EDT	HAIL 0.25	Spring Lake Heights, NJ

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
Apr 9, 12:01 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.6 hours before the alert went out and 170 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: 942 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 241 m²/s²
0-3 km storm-relative helicity: 361 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

498 
WUUS51 KPHI 091733
SVRPHI
NJC001-005-007-015-021-025-029-033-PAC017-045-101-091815-
/O.NEW.KPHI.SV.W.0023.200409T1733Z-200409T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
133 PM EDT Thu Apr 9 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Atlantic County in southern New Jersey...
  Northeastern Salem County in southern New Jersey...
  Northern Ocean County in southern New Jersey...
  Camden County in southern New Jersey...
  Southeastern Mercer County in central New Jersey...
  Gloucester County in southern New Jersey...
  Burlington County in southern New Jersey...
  Southern Monmouth County in central New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...
  Central Philadelphia County in southeastern Pennsylvania...
  Southeastern Delaware County in southeastern Pennsylvania...

* Until 215 PM EDT.

* At 132 PM EDT, severe thunderstorms were located along a line
  extending from Tullytown to Swedesboro, moving east at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Philadelphia, Toms River, Trenton, Camden, Gloucester City,
  Lakewood, Cherry Hill, Bensalem, Jackson, Howell, Evesham, Mount
  Laurel, Willingboro, Deptford, Voorhees, Medford, West Deptford,
  Glassboro, Lindenwold and Hammonton.

People attending Covid-19 Drive through testing should seek safe
shelter immediately!

This includes the following highways...
 Atlantic City Expressway between mile markers 21 and 44.
 Garden State Parkway between mile markers 83 and 99.
 Interstate 195 in New Jersey between mile markers 0 and 34.
 Interstate 295 in New Jersey between mile markers 8 and 61.
 Interstate 95 in Pennsylvania between mile markers 14 and 40.
 New Jersey Turnpike between exits 2 and 8.
 Interstate 676 in New Jersey between mile markers 0 and 4.
 Interstate 76 in New Jersey between mile markers 0 and 3.
 Interstate 76 in Pennsylvania between mile markers 348 and 351.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

&&

LAT...LON 4017 7397 3947 7482 3974 7542 4021 7484
      4019 7403
TIME...MOT...LOC 1732Z 288DEG 37KT 4017 7482 3976 7531 

HAIL...0.75IN
WIND...60MPH
 
$$

MPS

1 follow-up statement

014 
WWUS51 KPHI 091810
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
210 PM EDT Thu Apr 9 2020

NJC001-005-007-015-021-025-029-033-PAC017-045-101-091820-
/O.EXP.KPHI.SV.W.0023.000000T0000Z-200409T1815Z/
Atlantic NJ-Salem NJ-Ocean NJ-Camden NJ-Mercer NJ-Gloucester NJ-
Burlington NJ-Monmouth NJ-Bucks PA-Philadelphia PA-Delaware PA-
210 PM EDT Thu Apr 9 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ATLANTIC...
NORTHEASTERN SALEM...NORTHERN OCEAN...CAMDEN...SOUTHEASTERN MERCER...
GLOUCESTER...BURLINGTON...SOUTHERN MONMOUTH...SOUTHEASTERN BUCKS...
CENTRAL PHILADELPHIA AND SOUTHEASTERN DELAWARE COUNTIES WILL EXPIRE
AT 215 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However, gusty 
winds are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 400 PM EDT for
southern and central New Jersey.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 4017 7397 3947 7482 3974 7542 4021 7484
      4019 7403
TIME...MOT...LOC 1810Z 288DEG 37KT 4005 7435 3964 7484 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 9:57 AM EDT	Special Marine Warning	PHI		63 min
Apr 9, 10:56 AM EDT	Special Marine Warning	PHI		29 min
Apr 9, 12:05 PM EDT	Special Weather Statement	PHI	Warren	40 min
Apr 9, 12:52 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	23 min
Apr 9, 1:00 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Warren	45 min
Apr 9, 1:12 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	48 min
Apr 9, 1:14 PM EDT	Special Weather Statement	PHI	Morris	31 min
Apr 9, 1:18 PM EDT	Special Weather Statement	PHI	Cumberland	27 min
Apr 9, 1:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset	52 min
Apr 9, 1:30 PM EDT	Special Marine Warning	PHI		60 min
Apr 9, 1:44 PM EDT	Special Marine Warning	PHI		61 min
Apr 9, 2:08 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Monmouth, Ocean	30 min
Apr 9, 2:13 PM EDT	Special Marine Warning	PHI		33 min
Apr 9, 3:13 PM EDT	Coastal Flood Statement	PHI	Ocean	4 hr
Apr 9, 3:32 PM EDT	Wind Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	27 hr
Apr 9, 12:23 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery	52 min
Apr 9, 1:26 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia	49 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Severe Thunderstorm Warnings in Pennsylvania, 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.