Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 243, NWS Philadelphia/Mount Holly

July 21, 20194 counties in New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2019, 9:24 PM EDT for 4 counties in New Jersey; 4 counties in Pennsylvania. It was in force for 51 min. 12 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 21, 2019, 9:24 PM EDT (01:24 UTC)
Expired: Jul 21, 2019, 10:15 PM EDT
In force: 51 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 01:27 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 21, 9:38 PM EDT	TSTM WND DMG	3 Wsw Pleasant Valley, NJ	DOWNED TREE IN ROADWAY ON ROUTE 57. TIME ESTIMATED FROM RADAR.
Jul 21, 9:42 PM EDT	TSTM WND DMG	2 Nnw Washington, NJ	WIRES DOWN ON MINE HILL RD AND PINEHURST DR. TIME ESTIMATED FROM RADAR.
Jul 21, 9:43 PM EDT	TSTM WND DMG	1 Ene Washington, NJ	SEVERAL REPORTS OF TREES DOWN...INCLUDING AT PORT COLDEN ELEMENTARY SCHOOL. TIME ESTIMATED FROM RADAR.
Jul 21, 9:45 PM EDT	TSTM WND DMG	1 S Port Murray, NJ	TREES AND WIRES DOWN ON MOUNTAIN POINT RD. TIME ESTIMATED FROM RADAR.
Jul 21, 9:45 PM EDT	TSTM WND DMG	1 Ssw Port Murray, NJ	MULTIPLE TREES DOWN ON ANDERSON RD AND JACKSON ST. TIME ESTIMATED FROM RADAR.
Jul 21, 9:47 PM EDT	TSTM WND DMG	2 Ene Bethlehem Twp, NJ	DOWNED TREES NEAR THE INTERSECTION OF CHARLESTOWN ROAD AND MINE ROAD. TIME ESTIMATED FROM RADAR.
Jul 21, 10:02 PM EDT	TSTM WND DMG	Trexlertown, PA	MPING REPORT OF TREE BRANCHES AND POWER LINES DOWN AT THIS LOCATION. TIME ESTIMATED FROM RADAR.
Jul 21, 10:13 PM EDT	TSTM WND DMG	Trexlertown, PA	MPING REPORT OF 3 INCH TREE LIMBS OR POWER POLES SNAPPED.
Jul 21, 10:15 PM EDT	TSTM WND GST 70	Trexlertown, PA	CHASER ESTIMATES GUSTS UP TO 70MPH.
Jul 21, 10:23 PM EDT	TSTM WND DMG	Watchung, NJ	DOWNED TREE CLOSED MOUNTAIN BOULEVARD BETWEEN BROOKDALE ROAD AND THE WATCHUNG CIRCLE. TIME ESTIMATED FROM RADAR.
Jul 21, 10:25 PM EDT	TSTM WND DMG	Emmaus, PA	SEVERAL REPORTS OF TREES AND WIRES DOWN. TIME ESTIMATED FROM RADAR.
Jul 21, 10:25 PM EDT	TSTM WND DMG	Trexlertown, PA	MULTIPLE TRANSFORMERS EXPLODING WITH ESTIMATED GUSTS TO AT LEAST 60MPH.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.4 hours before the alert went out and 167 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: 2295 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1588 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

350 
WUUS51 KPHI 220124
SVRPHI
NJC019-027-035-041-PAC011-017-077-095-220215-
/O.NEW.KPHI.SV.W.0243.190722T0124Z-190722T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
924 PM EDT Sun Jul 21 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Morris County in northern New Jersey...
  Hunterdon County in northwestern New Jersey...
  Southern Warren County in northwestern New Jersey...
  Somerset County in northern New Jersey...
  East central Berks County in eastern Pennsylvania...
  Southeastern Lehigh County in eastern Pennsylvania...
  Northwestern Bucks County in southeastern Pennsylvania...
  Southeastern Northampton County in eastern Pennsylvania...

* Until 1015 PM EDT.

* At 922 PM EDT, severe thunderstorms were located along a line
  extending from Netcong to Harmony to Hellertown to near Topton,
  moving east 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...
  Allentown, Easton, Morristown, Somerville, Bethlehem, Bridgewater,
  Dover, Madison, Forks, Middlesex, Florham Park, Emmaus, East
  Hanover, Bound Brook, Manville, Hackettstown, Quakertown, Chatham,
  Perkasie and Byram.

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 these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to 
urban and poor drainage flooding. Do not drive your vehicle through 
flooded roadways.

&&

LAT...LON 4079 7437 4074 7437 4067 7446 4066 7445
      4066 7440 4060 7445 4047 7474 4034 7522
      4040 7546 4045 7553 4043 7555 4050 7583
      4066 7548 4084 7517 4092 7472 4090 7471
      4094 7458 4088 7434 4086 7432
TIME...MOT...LOC 0122Z 291DEG 29KT 4089 7472 4073 7511 4058 7536 4050
7564

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

Robertson

1 follow-up statement

559 
WWUS51 KPHI 220149
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
949 PM EDT Sun Jul 21 2019

NJC019-027-035-041-PAC011-017-077-095-220215-
/O.CON.KPHI.SV.W.0243.000000T0000Z-190722T0215Z/
Morris NJ-Hunterdon NJ-Warren NJ-Somerset NJ-Berks PA-Lehigh PA-
Bucks PA-Northampton PA-
949 PM EDT Sun Jul 21 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR MORRIS...HUNTERDON...SOUTHERN WARREN...SOMERSET...EAST CENTRAL
BERKS...SOUTHEASTERN LEHIGH...NORTHWESTERN BUCKS AND SOUTHEASTERN
NORTHAMPTON COUNTIES...

At 948 PM EDT, severe thunderstorms were located along a line
extending from near Victory Gardens to Glen Gardner to Ferndale to
near Geryville, moving east 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...
Allentown, Easton, Morristown, Somerville, Bethlehem, Bridgewater,
Dover, Madison, Middlesex, Florham Park, Emmaus, East Hanover, Bound
Brook, Manville, Hackettstown, Quakertown, Chatham, Perkasie, Byram
and Bedminster.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4074 7437 4067 7446 4065 7441 4060 7445
      4047 7474 4034 7522 4040 7545 4045 7553
      4043 7555 4050 7582 4062 7558 4065 7526
      4084 7494 4094 7458 4087 7433 4086 7432
TIME...MOT...LOC 0148Z 280DEG 28KT 4084 7454 4069 7493 4054 7518 4046
7546

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

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:25 PM EDT	Special Weather Statement	PHI	Warren	50 min
Jul 21, 8:44 PM EDT	Severe Thunderstorm Warning	PHI	Warren	46 min
Jul 21, 9:05 PM EDT	Special Weather Statement	PHI	Morris	25 min
Jul 21, 10:12 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Monmouth, Morris, Somerset	48 min
Jul 21, 10:13 PM EDT	Severe Thunderstorm Warning	PHI	Salem	47 min
Jul 21, 10:15 PM EDT	Special Marine Warning	PHI		60 min
Jul 21, 10:54 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	25 min
Jul 21, 10:58 PM EDT	Special Marine Warning	PHI		62 min
Jul 21, 11:02 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	31 min
Jul 21, 11:27 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	48 min
Jul 21, 11:31 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	44 min
Jul 21, 11:40 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	50 min
Jul 21, 11:54 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	51 min
Jul 22, 12:00 AM EDT	Special Marine Warning	PHI		90 min
Jul 22, 12:16 AM EDT	Special Weather Statement	PHI	Mercer	29 min
Jul 22, 12:34 AM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	41 min
Jul 22, 1:50 PM EDT	Special Weather Statement	PHI	Warren	25 min
Jul 22, 2:00 PM EDT	Special Weather Statement	PHI	Sussex	45 min
Jul 22, 2:13 PM EDT	Special Weather Statement	PHI	Warren	32 min
Jul 22, 2:35 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	40 min
Jul 22, 2:58 PM EDT	Small Craft Advisory	PHI		27 hr
Jul 22, 3:02 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	4 hr
Jul 22, 3:12 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex	48 min
Jul 22, 3:33 PM EDT	Areal Flood Advisory	PHI	Warren	7 hr
Jul 22, 3:43 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Jul 22, 4:11 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	4 hr
Jul 22, 4:16 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	59 min
Jul 22, 4:24 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	51 min
Jul 22, 4:40 PM EDT	Areal Flood Advisory	PHI	Camden, Cumberland, Gloucester, Salem	114 min
Jul 22, 4:52 PM EDT	Special Marine Warning	PHI		53 min
Jul 22, 5:01 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	44 min
Jul 22, 5:04 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	41 min
Jul 22, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	61 min
Jul 22, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Warren	73 min
Jul 22, 5:34 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Sussex, Warren	4 hr
Jul 22, 5:40 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more	80 min
Jul 22, 5:43 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Hunterdon, Mercer, Middlesex and 4 more	3 hr
Jul 22, 5:50 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more	40 min
Jul 22, 5:52 PM EDT	Special Marine Warning	PHI		53 min
Jul 22, 6:09 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	51 min
Jul 22, 6:12 PM EDT	Special Marine Warning	PHI		93 min
Jul 22, 6:21 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cumberland, Monmouth, Ocean	4 hr
Jul 22, 6:27 PM EDT	Special Marine Warning	PHI		48 min
Jul 22, 6:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Monmouth, Morris, Somerset	34 min
Jul 22, 6:35 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	4 hr
Jul 22, 6:38 PM EDT	Special Marine Warning	PHI		67 min
Jul 22, 6:54 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean	51 min
Jul 22, 7:39 PM EDT	Special Marine Warning	PHI		96 min
Jul 21, 9:30 PM EDT	Severe Thunderstorm Warning	PHI	Chester	45 min
Jul 21, 9:58 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	2 hr
Jul 21, 10:14 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	46 min
Jul 21, 10:30 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh, Northampton	3 hr
Jul 21, 10:31 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh, Northampton	3 hr
Jul 21, 10:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	40 min
Jul 21, 10:42 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	48 min
Jul 21, 10:58 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	59 min
Jul 21, 11:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery	40 min
Jul 21, 11:38 PM EDT	Flash Flood Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	2 hr
Jul 22, 12:05 AM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	40 min
Jul 22, 12:45 AM EDT	Special Weather Statement	PHI	Monroe	30 min
Jul 22, 1:11 AM EDT	Special Weather Statement	PHI	Monroe	34 min
Jul 22, 5:32 AM EDT	Areal Flood Warning	PHI	Lehigh	49 min
Jul 22, 1:28 PM EDT	Special Weather Statement	PHI	Monroe	32 min
Jul 22, 3:18 PM EDT	Special Weather Statement	PHI	Chester	57 min
Jul 22, 3:27 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	48 min
Jul 22, 3:39 PM EDT	Special Weather Statement	PHI	Berks	51 min
Jul 22, 3:47 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	58 min
Jul 22, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	50 min
Jul 22, 5:05 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh, Northampton	4 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2019 Severe Thunderstorm Warnings in Pennsylvania, 2019 Every severe thunderstorm warning in 2019

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.