Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 295, NWS Philadelphia/Mount Holly

July 31, 2019Monroe County, Northampton County, Pennsylvania; Morris County, Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 31, 2019, 4:52 PM EDT for Monroe County, Northampton County, Pennsylvania; Morris County, Sussex County, Warren County, New Jersey. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 31, 2019, 4:52 PM EDT (20:52 UTC)
Expired: Jul 31, 2019, 5:30 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 Morris County, NJ, Sussex County, NJ, Warren County, NJ, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 130 km from the middle of the area, began a volume at 20:51 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 31, 1:17 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 173 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: 885 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1207 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

333 
WUUS51 KPHI 312052
SVRPHI
NJC027-037-041-PAC089-095-312130-
/O.NEW.KPHI.SV.W.0295.190731T2052Z-190731T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
452 PM EDT Wed Jul 31 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Morris County in northern New Jersey...
  Southwestern Sussex County in northwestern New Jersey...
  Warren County in northwestern New Jersey...
  East central Monroe County in northeastern Pennsylvania...
  Northeastern Northampton County in eastern Pennsylvania...

* Until 530 PM EDT.

* At 451 PM EDT, severe thunderstorms were located along a line
  extending from Newton to near East Stroudsburg, moving east at 15
  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...
  Newton, Dover, Hopatcong, East Stroudsburg, Hackettstown, Wharton,
  Washington, Blairstown, Bangor, Mount Arlington, Stanhope, Netcong,
  Belvidere, Oxford, Ogdensburg, Hope, East Bangor, Branchville,
  Andover and Brass Castle.

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 4096 7438 4073 7508 4106 7536 4115 7515
      4114 7509 4108 7503 4116 7490 4122 7486
TIME...MOT...LOC 2051Z 290DEG 13KT 4106 7477 4097 7519 

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

Fitzsimmons

2 follow-up statements

905 
WWUS51 KPHI 312112
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
512 PM EDT Wed Jul 31 2019

NJC027-037-041-PAC089-095-312130-
/O.CON.KPHI.SV.W.0295.000000T0000Z-190731T2130Z/
Morris NJ-Sussex NJ-Warren NJ-Monroe PA-Northampton PA-
512 PM EDT Wed Jul 31 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHERN MORRIS...SOUTHWESTERN SUSSEX...WARREN...EAST CENTRAL
MONROE AND NORTHEASTERN NORTHAMPTON COUNTIES...

At 512 PM EDT, severe thunderstorms were located along a line
extending from near Lake Mohawk to Columbia, moving east at 15 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...
Newton, Dover, Hopatcong, East Stroudsburg, Hackettstown, Wharton,
Washington, Blairstown, Bangor, Mount Arlington, Stanhope, Netcong,
Belvidere, Oxford, Ogdensburg, Hope, East Bangor, Branchville,
Andover and Brass Castle.

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 4096 7438 4073 7508 4106 7536 4115 7515
      4114 7509 4108 7503 4116 7490 4122 7486
      4121 7486
TIME...MOT...LOC 2112Z 290DEG 13KT 4103 7469 4095 7511 

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

Fitzsimmons

411 
WWUS51 KPHI 312130
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
530 PM EDT Wed Jul 31 2019

NJC027-037-041-PAC089-095-312139-
/O.EXP.KPHI.SV.W.0295.000000T0000Z-190731T2130Z/
Morris NJ-Sussex NJ-Warren NJ-Monroe PA-Northampton PA-
530 PM EDT Wed Jul 31 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MORRIS...SOUTHWESTERN
SUSSEX...WARREN...EAST CENTRAL MONROE AND NORTHEASTERN NORTHAMPTON
COUNTIES WILL EXPIRE AT 530 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 900 PM EDT for
northern and northwestern New Jersey...and eastern and northeastern
Pennsylvania.

LAT...LON 4096 7438 4073 7508 4106 7536 4115 7515
      4114 7509 4108 7503 4116 7490 4122 7486
      4121 7486
TIME...MOT...LOC 2129Z 290DEG 13KT 4101 7462 4093 7504 

$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 10:45 PM EDT	Special Weather Statement	PHI	Berks	45 min
Jul 30, 11:38 PM EDT	Special Weather Statement	PHI	Lehigh	52 min
Jul 31, 12:06 AM EDT	Special Weather Statement	PHI	Carbon	39 min
Jul 31, 3:28 AM EDT	Flash Flood Watch	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	17 hr
Jul 31, 1:02 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	28 min
Jul 31, 1:14 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	3 hr
Jul 31, 1:19 PM EDT	Flash Flood Warning	PHI	Bucks, Delaware, Philadelphia	5 hr
Jul 31, 1:30 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	45 min
Jul 31, 1:46 PM EDT	Flash Flood Warning	PHI	Bucks	3 hr
Jul 31, 2:11 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	49 min
Jul 31, 2:27 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	3 hr
Jul 31, 2:32 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Philadelphia	3 hr
Jul 31, 2:46 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	44 min
Jul 31, 3:24 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	51 min
Jul 31, 3:49 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	41 min
Jul 31, 4:36 PM EDT	Areal Flood Advisory	PHI	Bucks, Monroe, Northampton	4 hr
Jul 31, 4:58 PM EDT	Flash Flood Warning	PHI	Monroe	4 hr
Jul 31, 1:43 PM EDT	Special Marine Warning	PHI		62 min
Jul 31, 1:49 PM EDT	Special Marine Warning	PHI		86 min
Jul 31, 1:57 PM EDT	Special Weather Statement	PHI	Ocean	33 min
Jul 31, 2:21 PM EDT	Areal Flood Advisory	PHI	Ocean	4 hr
Jul 31, 2:23 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	52 min
Jul 31, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth, Ocean	46 min
Jul 31, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	46 min
Jul 31, 2:53 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	52 min
Jul 31, 3:00 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	3 hr
Jul 31, 3:05 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	40 min
Jul 31, 3:06 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 3:20 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	40 min
Jul 31, 3:24 PM EDT	Flash Flood Warning	PHI	Monmouth	4 hr
Jul 31, 3:39 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	4 hr
Jul 31, 3:39 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	51 min
Jul 31, 3:48 PM EDT	Flash Flood Warning	PHI	Ocean	2 hr
Jul 31, 3:51 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 3:58 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset	17 min
Jul 31, 5:02 PM EDT	Special Weather Statement	PHI	Atlantic	28 min
Jul 31, 5:16 PM EDT	Special Weather Statement	PHI	Atlantic	44 min
Jul 31, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cumberland, Ocean, Salem	48 min
Jul 31, 5:41 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	3 hr
Jul 31, 5:44 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	25 min
Jul 31, 5:51 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	35 min
Jul 31, 5:57 PM EDT	Special Marine Warning	PHI		63 min
Jul 31, 6:05 PM EDT	Special Marine Warning	PHI		55 min
Jul 31, 6:41 PM EDT	Special Marine Warning	PHI		64 min
Jul 31, 6:53 PM EDT	Special Marine Warning	PHI		54 min
Jul 31, 7:36 PM EDT	Special Marine Warning	PHI		54 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.