Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 282, NWS Philadelphia/Mount Holly

July 31, 20197 counties in New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 31, 2019, 2:11 PM EDT for 7 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 49 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, 2:11 PM EDT (18:11 UTC)
Expired: Jul 31, 2019, 3:00 PM EDT
In force: 49 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Burlington County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Somerset County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 34 km from the middle of the area, began a volume at 18:15 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, 2:26 PM EDT	TSTM WND GST 51	Mercer County Airport, NJ

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, 6.2 hours before the alert went out and 169 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.

121 
WUUS51 KPHI 311811
SVRPHI
NJC005-019-021-023-025-029-035-PAC017-311900-
/O.NEW.KPHI.SV.W.0282.190731T1811Z-190731T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
211 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 Hunterdon County in northwestern New Jersey...
  Mercer County in central New Jersey...
  North central Burlington County in southern New Jersey...
  Southwestern Somerset County in northern New Jersey...
  Southwestern Monmouth County in central New Jersey...
  Southwestern Middlesex County in northern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...

* Until 300 PM EDT.

* At 209 PM EDT, severe thunderstorms were located over Yardley 
  extending south into Burlington County New Jersey, moving 
  northeast at 25 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...
  Trenton, East Brunswick, South Brunswick, Manalapan, Ewing,
  Princeton, Florence, Burlington, Bristol, Jamesburg, Hightstown,
  Bordentown, Cranbury, Pennington, Yardley, Newtown, Hopewell,
  Tullytown, Allentown and Langhorne.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 0 and 18.
 Interstate 295 in New Jersey between mile markers 49 and 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3996 7467 4020 7504 4055 7469 4028 7422
TIME...MOT...LOC 1809Z 216DEG 22KT 4025 7482 

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

Fitzsimmons

1 follow-up statement

223 
WWUS51 KPHI 311842
SVSPHI

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

NJC019-PAC017-311851-
/O.CAN.KPHI.SV.W.0282.000000T0000Z-190731T1900Z/
Hunterdon NJ-Bucks PA-
242 PM EDT Wed Jul 31 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HUNTERDON AND
SOUTHEASTERN BUCKS COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has 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, central, northern and northwestern New Jersey.

LAT...LON 3997 7467 4007 7484 4016 7469 4033 7491
      4035 7488 4035 7486 4036 7486 4039 7482
      4038 7481 4040 7480 4051 7462 4028 7422
TIME...MOT...LOC 1841Z 232DEG 17KT 4032 7464 

$$

NJC005-021-023-025-029-035-311900-
/O.CON.KPHI.SV.W.0282.000000T0000Z-190731T1900Z/
Ocean NJ-Mercer NJ-Burlington NJ-Somerset NJ-Monmouth NJ-
Middlesex NJ-
242 PM EDT Wed Jul 31 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTHWESTERN OCEAN...MERCER...NORTH CENTRAL BURLINGTON...
SOUTHWESTERN SOMERSET...SOUTHWESTERN MONMOUTH AND SOUTHWESTERN
MIDDLESEX COUNTIES...

At 241 PM EDT, a severe thunderstorm was located over Princeton, or 8
miles northeast of Trenton, moving northeast at 20 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...
Trenton, East Brunswick, South Brunswick, Manalapan, Ewing,
Princeton, Burlington, Jamesburg, Hightstown, Bordentown, Cranbury,
Pennington, Hopewell, Allentown, Roosevelt, Wrightstown, Rocky Hill,
Millstone, Skillman and East Freehold.

This includes the following highways...
 Interstate 195 in New Jersey between mile markers 1 and 18.
 Interstate 295 in New Jersey between mile markers 49 and 57, and
between mile markers 61 and 75.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3997 7467 4007 7484 4016 7469 4033 7491
      4035 7488 4035 7486 4036 7486 4039 7482
      4038 7481 4040 7480 4051 7462 4028 7422
TIME...MOT...LOC 1841Z 232DEG 17KT 4032 7464 

HAIL...0.75IN
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, 2:21 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, 2:32 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
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, 2:27 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	3 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.