Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 5, NWS Philadelphia/Mount Holly

March 15, 2019Hunterdon County, Morris County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 15, 2019, 7:45 PM EDT for Hunterdon County, Morris County, Somerset County, New Jersey. It was in force for 45 min. 3 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: Mar 15, 2019, 7:45 PM EDT (23:45 UTC)
Expired: Mar 15, 2019, 8:30 PM EDT
In force: 45 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 87 km from the middle of the area, began a volume at 23:46 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
Mar 15, 7:56 PM EDT	TSTM WND DMG	Bernardsville, NJ	TREE REPORTED DOWN. TIME ESTIMATED FROM RADAR.
Mar 15, 7:56 PM EDT	TSTM WND DMG	Far Hills, NJ	TREE REPORTED DOWN. TIME ESTIMATED FROM RADAR.
Mar 15, 7:56 PM EDT	TSTM WND DMG	Peapack And Gladstone, NJ	TREE REPORTED DOWN. TIME ESTIMATED FROM RADAR.

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 12:00Z, 11.8 hours before the alert went out and 135 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: 841 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 397 m²/s²
0-3 km storm-relative helicity: 414 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

791 
WUUS51 KPHI 152345
SVRPHI
NJC019-027-035-160030-
/O.NEW.KPHI.SV.W.0005.190315T2345Z-190316T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
745 PM EDT FRI MAR 15 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southern Morris County in northern New Jersey...
  Northeastern Hunterdon County in northwestern New Jersey...
  Northern Somerset County in northern New Jersey...

* Until 830 PM EDT.

* At 745 PM EDT, severe thunderstorms were located along a line
  extending from Long Valley to near Califon to near Clinton to
  Frenchtown, moving east at 45 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Morristown, Bridgewater, Madison, Florham Park, East Hanover,
  Chatham, Morris Plains, Mendham, High Bridge, Clinton, Peapack And
  Gladstone, Chester, Lebanon, Califon, Far Hills, Martinsville,
  Millington, Annandale, White House Station and Basking Ridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to hail and damaging winds, frequent cloud to ground 
lightning is occurring with this storm. Move indoors immediately. 
Remember, if you can hear thunder, you are close enough to be struck 
by lightning.

&&

LAT...LON 4082 7434 4079 7437 4076 7438 4075 7436
      4074 7437 4067 7446 4066 7445 4066 7440
      4063 7442 4060 7445 4054 7501 4076 7481
      4088 7434 4086 7432
TIME...MOT...LOC 2345Z 260DEG 41KT 4078 7474 4070 7478 4059 7488 4052
7503

HAIL...0.88IN
WIND...60MPH
 
$$

Gorse

1 follow-up statement

402 
WWUS51 KPHI 160000
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
800 PM EDT FRI MAR 15 2019

NJC019-027-035-160030-
/O.CON.KPHI.SV.W.0005.000000T0000Z-190316T0030Z/
Morris NJ-Hunterdon NJ-Somerset NJ-
800 PM EDT FRI MAR 15 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SOUTHEASTERN MORRIS...NORTHEASTERN HUNTERDON AND NORTHERN
SOMERSET COUNTIES...

At 800 PM EDT, severe thunderstorms were located along a line
extending from Mendham to near Far Hills to near Bridgewater to near
White House Station, moving east at 50 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Morristown, Bridgewater, Madison, Florham Park, East Hanover,
Chatham, Morris Plains, Mendham, Peapack And Gladstone, Far Hills,
Martinsville, Millington, Basking Ridge, Parsippany, North
Plainfield, Bernardsville, Watchung and Hanover Township.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to hail and damaging winds, frequent cloud to ground 
lightning is occurring with this storm. Move indoors immediately. 
Remember, if you can hear thunder, you are close enough to be struck 
by lightning.

&&

LAT...LON 4082 7434 4079 7437 4076 7438 4075 7436
      4074 7437 4067 7446 4066 7445 4066 7440
      4063 7442 4060 7445 4058 7475 4080 7466
      4088 7434 4086 7432
TIME...MOT...LOC 0000Z 257DEG 42KT 4079 7460 4072 7461 4064 7465 4060
7472

HAIL...0.88IN
WIND...60MPH
 
$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 3:44 AM EDT	Small Craft Advisory	PHI		40 hr
Mar 15, 6:27 PM EDT	Special Weather Statement	PHI	Warren	33 min
Mar 15, 6:33 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	117 min
Mar 15, 6:43 PM EDT	Special Weather Statement	PHI	Morris, Warren	32 min
Mar 15, 6:53 PM EDT	Special Weather Statement	PHI	Warren	37 min
Mar 15, 7:11 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	49 min
Mar 15, 7:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	52 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.