Alert archive / New Jersey / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 111, NWS Philadelphia/Mount Holly

May 30, 20194 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 30, 2019, 5:55 PM EDT for 4 counties in New Jersey. It was in force for 31 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: May 30, 2019, 5:55 PM EDT (21:55 UTC)
Expired: May 30, 2019, 6:26 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Philadelphia radar (KDIX), 69 km from the middle of the area, began a volume at 21:55 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
May 30, 2:01 PM EDT	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 130 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: 546 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: -63 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

368 
WUUS51 KPHI 302155
SVRPHI
NJC019-023-027-035-302245-
/O.NEW.KPHI.SV.W.0111.190530T2155Z-190530T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
555 PM EDT Thu May 30 2019

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  South central Morris County in northern New Jersey...
  East central Hunterdon County in northwestern New Jersey...
  Somerset County in northern New Jersey...
  Northern Middlesex County in northern New Jersey...

* Until 645 PM EDT.

* At 554 PM EDT, severe thunderstorms were located along a line
  extending from Millington to near Flagtown, moving east at 35 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...
  New Brunswick, Perth Amboy, Somerville, Somerset, Edison, Old
  Bridge, East Brunswick, Bridgewater, Sayreville, North Brunswick,
  Carteret, Middlesex, Bound Brook, Manville, Matawan, Millstone,
  Flagtown, Colonia, Brownville and Belle Mead.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4045 7423 4042 7425 4039 7431 4048 7488
      4073 7448 4072 7439 4067 7446 4066 7445
      4066 7440 4060 7446 4061 7431 4059 7429
      4059 7420
TIME...MOT...LOC 2154Z 279DEG 31KT 4068 7448 4052 7474 

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

SFJ

2 follow-up statements

251 
WWUS51 KPHI 302212
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
612 PM EDT Thu May 30 2019

NJC019-027-302222-
/O.CAN.KPHI.SV.W.0111.000000T0000Z-190530T2245Z/
Morris NJ-Hunterdon NJ-
612 PM EDT Thu May 30 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MORRIS AND EAST
CENTRAL HUNTERDON COUNTIES IS CANCELLED...

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

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4045 7423 4042 7425 4039 7431 4046 7472
      4067 7446 4066 7445 4066 7440 4060 7446
      4061 7431 4059 7429 4059 7420
TIME...MOT...LOC 2212Z 289DEG 27KT 4056 7436 4052 7459 

$$

NJC023-035-302245-
/O.CON.KPHI.SV.W.0111.000000T0000Z-190530T2245Z/
Somerset NJ-Middlesex NJ-
612 PM EDT Thu May 30 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR CENTRAL SOMERSET AND NORTHERN MIDDLESEX COUNTIES...

At 612 PM EDT, severe thunderstorms were located along a line
extending from near Edison to Millstone, moving east at 30 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...
New Brunswick, Perth Amboy, Somerville, Somerset, Edison, Old Bridge,
East Brunswick, Sayreville, North Brunswick, Carteret, Middlesex,
Bound Brook, Manville, Matawan, Millstone, Colonia, Brownville, Belle
Mead, North Brunswick Township and Society Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4045 7423 4042 7425 4039 7431 4046 7472
      4067 7446 4066 7445 4066 7440 4060 7446
      4061 7431 4059 7429 4059 7420
TIME...MOT...LOC 2212Z 289DEG 27KT 4056 7436 4052 7459 

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

SFJ

431 
WWUS51 KPHI 302226
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
626 PM EDT Thu May 30 2019

NJC023-035-302236-
/O.CAN.KPHI.SV.W.0111.000000T0000Z-190530T2245Z/
Somerset NJ-Middlesex NJ-
626 PM EDT Thu May 30 2019

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SOMERSET AND NORTHERN
MIDDLESEX COUNTIES IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4045 7423 4042 7425 4039 7431 4046 7472
      4067 7446 4066 7445 4066 7440 4060 7446
      4061 7431 4059 7429 4059 7420
TIME...MOT...LOC 2225Z 279DEG 31KT 4054 7421 4050 7444 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 8:00 PM EDT	Special Marine Warning	PHI		60 min
May 29, 8:02 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Ocean	107 min
May 29, 8:35 PM EDT	Special Marine Warning	PHI		85 min
May 30, 3:20 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 7 more	18 hr
May 30, 3:33 AM EDT	Dense Fog Advisory	PHI	Burlington, Mercer	4 hr
May 30, 4:17 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
May 30, 4:19 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	4 hr
May 30, 4:25 PM EDT	Special Weather Statement	PHI	Warren	35 min
May 30, 4:36 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth, Ocean	39 min
May 30, 4:40 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Warren	50 min
May 30, 4:46 PM EDT	Special Weather Statement	PHI	Salem	29 min
May 30, 4:48 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	42 min
May 30, 4:49 PM EDT	Flash Flood Warning	PHI	Warren	4 hr
May 30, 4:57 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	4 hr
May 30, 4:58 PM EDT	Special Marine Warning	PHI		62 min
May 30, 5:03 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Warren	4 hr
May 30, 5:14 PM EDT	Special Weather Statement	PHI	Salem	31 min
May 30, 5:17 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Mercer, Monmouth	4 hr
May 30, 5:20 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Warren	40 min
May 30, 5:22 PM EDT	Areal Flood Advisory	PHI	Cape May, Cumberland, Gloucester, Salem	2 hr
May 30, 5:23 PM EDT	Special Weather Statement	PHI	Mercer	37 min
May 30, 5:32 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	43 min
May 30, 5:33 PM EDT	Special Marine Warning	PHI		27 min
May 30, 5:55 PM EDT	Special Marine Warning	PHI		65 min
May 30, 6:06 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	4 hr
May 30, 6:53 PM EDT	Flash Flood Warning	PHI	Morris, Somerset	4 hr
May 30, 7:35 PM EDT	Special Weather Statement	PHI	Mercer	25 min
May 30, 7:56 PM EDT	Special Weather Statement	PHI	Mercer	34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.