Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 14, NWS Philadelphia/Mount Holly

February 25, 20175 counties in New Jersey; Bucks County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Feb 25, 2017, 4:54 PM EST for 5 counties in New Jersey; Bucks County, Monroe County, 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: Feb 25, 2017, 4:54 PM EST (21:54 UTC)
Expired: Feb 25, 2017, 5:45 PM EST
In force: 51 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 126 km from the middle of the area, began a volume at 21:58 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
Feb 25, 4:54 PM EST	TSTM WND GST 55	Blairstown, NJ
Feb 25, 4:55 PM EST	TSTM WND DMG	Frelinghuysen Twp, NJ	TREE DOWN ON ROUTE 94 SOUTH NEAR CR659 AND SPRING VALLEY ROAD.
Feb 25, 5:05 PM EST	TSTM WND DMG	Stillwater, NJ	TREE DOWN ONTO A HOUSE AND TREES UPROOTED IN THE WOODED AREA NEXT TO THE HOUSE. TIME ESTIMATED FROM RADAR.
Feb 25, 5:08 PM EST	TSTM WND DMG	Branchville, NJ	SEVERAL LARGE TREES SNAPPED OR UPROOTED. TIME ESTIMATED FROM RADAR.
Feb 25, 5:13 PM EST	TSTM WND DMG	Beemerville, NJ	BLACKSMITH MUSEUM BUILDING FLATTENED AND SEVERAL TREES SPLIT OR UPROOTED. SOME OTHER BUILDINGS ON THE SPACE FARMS ZOO AND MUSEUM GROUNDS HAD SIDING RIPPED OFF AND ROOF DAMAGE.
Feb 25, 5:13 PM EST	TSTM WND DMG	Beemerville, NJ	TIME EST. BLACKSMITH BUILDING FLATTENED... TREES DOWN. SPACE FARMS ZOO.
Feb 25, 5:14 PM EST	TSTM WND DMG	Colesville, NJ	LARGE PINE TREE UPROOTED. TIME ESTIMATED FROM RADAR.
Feb 25, 5:14 PM EST	TSTM WND DMG	Wantage, NJ	TIME EST. TREES AND WIRES DOWN.
Feb 25, 5:14 PM EST	TSTM WND GST 58	4 Sw Wantage, NJ
Feb 25, 5:14 PM EST	TSTM WND GST 58	4 Sw Wantage, NJ
Feb 25, 5:17 PM EST	TSTM WND DMG	Wantage, NJ	TIME EST FM 88D/KFWN AND PWS OBS. TWO METAL BARN ROOFS PEELED 1/2 OFF.
Feb 25, 5:17 PM EST	TSTM WND DMG	Wantage, NJ	TWO METAL BARN ROOFS PEELED HALF WAY OFF. 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
Feb 25, 2:46 PM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.9 hours before the alert went out and 163 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: 576 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

818 
WUUS51 KPHI 252154
SVRPHI
NJC019-027-035-037-041-PAC017-089-252245-
/O.NEW.KPHI.SV.W.0014.170225T2154Z-170225T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
454 PM EST SAT FEB 25 2017

The National Weather Service in Mount Holly NJ  has issued a

* Severe Thunderstorm Warning for...
  Morris County in northern New Jersey...
  Northwestern Hunterdon County in northwestern New Jersey...
  Sussex County in northwestern New Jersey...
  Warren County in northwestern New Jersey...
  Northwestern Somerset County in northern New Jersey...
  North central Bucks County in southeastern Pennsylvania...
  Northeastern Monroe County in northeastern Pennsylvania...

* Until 545 PM EST

* At 453 PM EST, severe thunderstorms were located along a line
  extending from near Werry Lake to Millbrook to Pleasant Valley to
  Alpha to Ottsville, moving northeast at 80 mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Severe thunderstorms will be near,
  Crandon Lakes, Five Points, Flatbrookville and Millbrook around 
  500 PM EST. 
  Hackettstown, Clinton, Branchville, Annandale, Hainesville and 
  Pellettown around 505 PM EST. 
  Montague, High Bridge, Stanhope, Netcong, Sussex, Lebanon, 
  Allamuchy-Panther Valley, Beatyestown, Great Meadows-Vienna and 
  High Point around 510 PM EST. 
  Port Jervis, Hopatcong, Peapack And Gladstone, Far Hills, Lake 
  Mohawk, Long Valley and Greendell around 515 PM EST. 
  Newton, Mendham, Chester, Andover and Succasunna around 520 PM 
  EST. 
  Dover, Wharton, Rockaway, Morris Plains, Mount Arlington, 
  Ogdensburg, Victory Gardens, Highland Lake and Succasunna-Kenvil 
  around 525 PM EST. 
  Boonton, Franklin, Mountain Lakes, Hamburg, Lake Telemark, Upper 
  Greenwood Lake, Green Pond and Parsippany around 530 PM EST. 
  Kinnelon, Butler, Riverdale, Vernon Valley and Pequannock Township 
  around 535 PM EST. 

Other locations impacted by these severe thunderstorms include White
Meadow Lake, Hidden Lake, Beattyestown and Bernardsville.

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 this storm. 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
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4120 7437 4110 7449 4104 7450 4105 7445
      4102 7443 4100 7430 4095 7428 4035 7520
      4059 7523 4068 7509 4100 7504 4112 7524
      4120 7515 4115 7515 4108 7503 4109 7500
      4116 7490 4128 7484 4135 7475 4136 7469
TIME...MOT...LOC 2153Z 225DEG 69KT 4113 7510 4106 7497 4074 7503 4066
7516 4048 7514

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

DRAG

2 follow-up statements

186 
WWUS51 KPHI 252226
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
526 PM EST SAT FEB 25 2017

PAC017-089-252235-
/O.CAN.KPHI.SV.W.0014.000000T0000Z-170225T2245Z/
Bucks PA-Monroe PA-
526 PM EST SAT FEB 25 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BUCKS AND
NORTHEASTERN MONROE COUNTIES 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 EST for
northern and northwestern New Jersey.

LAT...LON 4120 7437 4110 7449 4104 7450 4105 7445
      4102 7443 4100 7430 4095 7428 4051 7498
      4094 7487 4112 7474 4125 7464 4136 7469
TIME...MOT...LOC 2225Z 243DEG 39KT 4135 7468 4128 7455 4096 7461 4088
7475 4060 7486

$$

NJC019-027-035-037-041-252245-
/O.CON.KPHI.SV.W.0014.000000T0000Z-170225T2245Z/
Morris NJ-Hunterdon NJ-Sussex NJ-Warren NJ-Somerset NJ-
526 PM EST SAT FEB 25 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EST
FOR MORRIS...NORTHEASTERN HUNTERDON...SUSSEX...EAST CENTRAL WARREN
AND NORTHWESTERN SOMERSET COUNTIES...

At 525 PM EST, severe thunderstorms were located along a line
extending from Matamoras to Unionville to near Hopatcong to Budd Lake
to near Lebanon, moving northeast at 45 mph.

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

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

These severe storms will be near...
  Ogdensburg, High Point and Vernon Valley around 530 PM EST. 
  Green Pond around 535 PM EST. 
  Kinnelon, Rockaway, Peapack And Gladstone and Victory Gardens 
  around 540 PM EST. 
  Boonton, Butler, Mendham, Mountain Lakes, Riverdale, Far Hills, 
  Lake Telemark and Pequannock Township around 545 PM EST. 

Other locations impacted by these severe thunderstorms include White
Meadow Lake, Beattyestown and Bernardsville.

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 this storm. 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
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4120 7437 4110 7449 4104 7450 4105 7445
      4102 7443 4100 7430 4095 7428 4051 7498
      4094 7487 4112 7474 4125 7464 4136 7469
TIME...MOT...LOC 2225Z 243DEG 39KT 4135 7468 4128 7455 4096 7461 4088
7475 4060 7486

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

DRAG

358 
WWUS51 KPHI 252235
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
535 PM EST SAT FEB 25 2017

NJC041-252245-
/O.CAN.KPHI.SV.W.0014.000000T0000Z-170225T2245Z/
Warren NJ-
535 PM EST SAT FEB 25 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WARREN 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 EST for
northern and northwestern New Jersey.

LAT...LON 4120 7437 4110 7449 4104 7450 4105 7445
      4102 7443 4100 7430 4095 7428 4065 7477
      4095 7471 4107 7457 4114 7451 4125 7447
TIME...MOT...LOC 2235Z 239DEG 38KT 4143 7457 4136 7444 4104 7450 4096
7464 4068 7475

$$

NJC019-027-035-037-252245-
/O.CON.KPHI.SV.W.0014.000000T0000Z-170225T2245Z/
Morris NJ-Hunterdon NJ-Sussex NJ-Somerset NJ-
535 PM EST SAT FEB 25 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EST
FOR MORRIS...EASTERN HUNTERDON...SOUTHEASTERN SUSSEX AND NORTHWESTERN
SOMERSET COUNTIES...

At 535 PM EST, severe thunderstorms were located along a line
extending from near Otisville to near Florida to near Green Pond to
Hopatcong to near White House Station, moving northeast at 45 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

These severe storms will be near...
  Kinnelon around 540 PM EST. 
  Butler, Upper Greenwood Lake and Highland Lake around 545 PM EST. 

Other locations impacted by these severe thunderstorms include White
Meadow Lake and Bernardsville.

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 this storm. 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
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4120 7437 4110 7449 4104 7450 4105 7445
      4102 7443 4100 7430 4095 7428 4065 7477
      4095 7471 4107 7457 4114 7451 4125 7447
TIME...MOT...LOC 2235Z 239DEG 38KT 4143 7457 4136 7444 4104 7450 4096
7464 4068 7475

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

DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 9:50 PM EST	Marine Dense Fog Advisory	PHI		20 hr
Feb 25, 4:17 PM EST	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	43 min
Feb 25, 4:24 PM EST	Special Marine Warning	PHI		66 min
Feb 25, 4:40 PM EST	Severe Thunderstorm Warning	PHI	Camden, Cumberland, Gloucester, Salem	50 min
Feb 25, 4:59 PM EST	Special Marine Warning	PHI		61 min
Feb 25, 5:01 PM EST	Special Weather Statement	PHI	Mercer, Somerset	44 min
Feb 25, 5:17 PM EST	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 5 more	43 min
Feb 25, 5:23 PM EST	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Gloucester, Salem	52 min
Feb 25, 5:38 PM EST	Special Marine Warning	PHI		67 min
Feb 25, 6:04 PM EST	Special Weather Statement	PHI	Middlesex, Monmouth, Ocean	41 min
Feb 25, 6:09 PM EST	Special Marine Warning	PHI		66 min
Feb 25, 6:14 PM EST	Special Weather Statement	PHI	Atlantic	31 min
Feb 25, 6:20 PM EST	Special Marine Warning	PHI		85 min
Feb 25, 2:22 PM EST	Special Weather Statement	PHI	Lebanon	53 min
Feb 25, 2:47 PM EST	Severe Thunderstorm Warning	PHI	Berks	43 min
Feb 25, 2:55 PM EST	Special Weather Statement	PHI	Carbon	50 min
Feb 25, 3:02 PM EST	Special Weather Statement	PHI	Berks	58 min
Feb 25, 3:19 PM EST	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Northampton	41 min
Feb 25, 3:26 PM EST	Severe Thunderstorm Warning	PHI	Berks, Chester	64 min
Feb 25, 3:57 PM EST	Special Weather Statement	PHI	Lehigh, Montgomery	48 min
Feb 25, 4:04 PM EST	Severe Thunderstorm Warning	PHI	Chester, Delaware	41 min
Feb 25, 4:05 PM EST	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe	40 min
Feb 25, 4:34 PM EST	Special Weather Statement	PHI	Monroe	41 min
Feb 25, 6:10 PM EST	Special Weather Statement	PHI	Delaware	35 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2017 Severe Thunderstorm Warnings in Pennsylvania, 2017 Every severe thunderstorm warning in 2017

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.