Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 284, NWS Philadelphia/Mount Holly

July 31, 20194 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 31, 2019, 2:29 PM EDT for 4 counties in New Jersey. It was in force for 46 min. 1 report 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 31, 2019, 2:29 PM EDT (18:29 UTC)
Expired: Jul 31, 2019, 3:15 PM EDT
In force: 46 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Burlington County, NJ, Mercer County, NJ, Monmouth County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 18 km from the middle of the area, began a volume at 18:31 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 31, 3:11 PM EDT	TSTM WND DMG	1 Ssw Colts Neck Twp, NJ	SEVERAL LARGE BRANCHES DOWN ON A GOLF COURSE. 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
Jul 31, 1:17 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.5 hours before the alert went out and 151 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.

873 
WUUS51 KPHI 311829
SVRPHI
NJC005-021-025-029-311915-
/O.NEW.KPHI.SV.W.0284.190731T1829Z-190731T1915Z/

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

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern Ocean County in southern New Jersey...
  Southeastern Mercer County in central New Jersey...
  Northeastern Burlington County in southern New Jersey...
  Southwestern Monmouth County in central New Jersey...

* Until 315 PM EDT.

* At 229 PM EDT, severe thunderstorms were located along a line
  extending from Imlaystown to near Browns Mills, moving east at 25
  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...
  Toms River, Lakewood, Jackson, Howell, Marlboro, Manalapan,
  Lakehurst, Allentown, Farmingdale, Roosevelt, Wrightstown, Leisure
  Village, East Freehold, Six Flags Theme Park, Pleasant Plains,
  Cedar Glen West, Jacksons Mills, Leisure Village East, West
  Freehold and Cassville.

This includes the following highways...
 Garden State Parkway between mile markers 83 and 90.
 Interstate 195 in New Jersey between mile markers 9 and 31.

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 3997 7417 3995 7464 4022 7457 4036 7413
TIME...MOT...LOC 1829Z 254DEG 22KT 4017 7450 4001 7454 

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

Fitzsimmons

1 follow-up statement

188 
WWUS51 KPHI 311849
SVSPHI

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

NJC021-311858-
/O.CAN.KPHI.SV.W.0284.000000T0000Z-190731T1915Z/
Mercer NJ-
249 PM EDT Wed Jul 31 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MERCER COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 900 PM EDT for
southern and central New Jersey.

LAT...LON 3997 7417 3995 7464 4018 7457 4020 7456
      4021 7455 4036 7413
TIME...MOT...LOC 1848Z 253DEG 20KT 4020 7440 4003 7444 

$$

NJC005-025-029-311915-
/O.CON.KPHI.SV.W.0284.000000T0000Z-190731T1915Z/
Ocean NJ-Burlington NJ-Monmouth NJ-
249 PM EDT Wed Jul 31 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR NORTHWESTERN OCEAN...NORTHEASTERN BURLINGTON AND SOUTHWESTERN
MONMOUTH COUNTIES...

At 248 PM EDT, severe thunderstorms were located along a line
extending from near Clarksburg to near Woodruff, moving east at 25
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Toms River, Lakewood, Jackson, Howell, Marlboro, Manalapan,
Lakehurst, Farmingdale, Roosevelt, Wrightstown, Leisure Village, East
Freehold, Six Flags Theme Park, Pleasant Plains, Cedar Glen West,
Jacksons Mills, Leisure Village East, West Freehold, Cassville and
Adelphia.

This includes the following highways...
 Garden State Parkway between mile markers 83 and 90.
 Interstate 195 in New Jersey between mile markers 9 and 31.

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 3997 7417 3995 7464 4018 7457 4020 7456
      4021 7455 4036 7413
TIME...MOT...LOC 1848Z 253DEG 20KT 4020 7440 4003 7444 

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

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 3:28 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 4 more	17 hr
Jul 31, 1:02 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	28 min
Jul 31, 1:14 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	3 hr
Jul 31, 1:19 PM EDT	Flash Flood Warning	PHI	Burlington	5 hr
Jul 31, 1:30 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer	45 min
Jul 31, 1:43 PM EDT	Special Marine Warning	PHI		62 min
Jul 31, 1:46 PM EDT	Flash Flood Warning	PHI	Burlington, Mercer	3 hr
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, 2:11 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	49 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	Monmouth, Ocean	46 min
Jul 31, 2:32 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 1 more	3 hr
Jul 31, 2:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	44 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, 3:24 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset	51 min
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, 3:49 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer, Monmouth	41 min
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, 4:36 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	4 hr
Jul 31, 4:52 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	38 min
Jul 31, 4:58 PM EDT	Flash Flood Warning	PHI	Sussex, Warren	4 hr
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 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.