Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 187, NWS Philadelphia/Mount Holly

July 13, 2023Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 13, 2023, 9:57 PM EDT for Sussex County, New Jersey. It was in force for 48 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 13, 2023, 9:57 PM EDT (01:57 UTC)
Expired: Jul 13, 2023, 10:45 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 148 km from the middle of the area, began a volume at 01:57 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 13, 10:30 PM EDT	HAIL 1	Vernon, NJ	Public report via social media; quarter-sized hail occurred between 10:18 and 10:30 PM.

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 00:00Z, 2.0 hours before the alert went out and 158 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: 1347 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 11.4

Open this sounding in Storm Lab

The text

As transmitted.

818 
WUUS51 KPHI 140157
SVRPHI
NJC037-140245-
/O.NEW.KPHI.SV.W.0187.230714T0157Z-230714T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
957 PM EDT Thu Jul 13 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Sussex County in northwestern New Jersey...

* Until 1045 PM EDT.

* At 956 PM EDT, a severe thunderstorm was located over Hainesville,
  or near Montague, moving east at 35 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...
  Montague, Sussex, Highland Lake, Vernon Valley, High Point and
  Hainesville.

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.

&&

LAT...LON 4120 7436 4116 7441 4121 7486 4123 7487
      4127 7484 4132 7479 4132 7477 4135 7475
      4136 7469
TIME...MOT...LOC 0156Z 265DEG 30KT 4125 7475 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gorse

2 follow-up statements

789 
WWUS51 KPHI 140219
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1019 PM EDT Thu Jul 13 2023

NJC037-140245-
/O.CON.KPHI.SV.W.0187.000000T0000Z-230714T0245Z/
Sussex NJ-
1019 PM EDT Thu Jul 13 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR NORTHEASTERN SUSSEX COUNTY...

At 1018 PM EDT, a severe thunderstorm was located near Sussex, or 8
miles southeast of Matamoras, moving east at 30 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...
Sussex, Highland Lake, Vernon Valley and High Point. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4119 7470 4135 7469 4135 7467 4120 7436
      4116 7441
TIME...MOT...LOC 0218Z 273DEG 27KT 4126 7461 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

RCM

886 
WWUS51 KPHI 140237
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1037 PM EDT Thu Jul 13 2023

NJC037-140247-
/O.EXP.KPHI.SV.W.0187.000000T0000Z-230714T0245Z/
Sussex NJ-
1037 PM EDT Thu Jul 13 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SUSSEX COUNTY
WILL EXPIRE AT 1045 PM EDT...
        
The storm which prompted the warning is moving out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4119 7470 4135 7469 4135 7467 4120 7436
      4116 7441
TIME...MOT...LOC 0237Z 265DEG 30KT 4122 7443 

$$

RCM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:39 PM EDT	Coastal Flood Advisory	PHI	Ocean	5 hr
Jul 13, 8:53 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	67 min
Jul 13, 10:49 PM EDT	Special Weather Statement	PHI	Sussex	26 min
Jul 14, 1:09 AM EDT	Special Weather Statement	PHI	Sussex	21 min
Jul 14, 1:52 AM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Jul 14, 5:54 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Somerset	51 min
Jul 14, 6:02 AM EDT	Special Weather Statement	PHI	Mercer	28 min
Jul 14, 6:20 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Morris, Somerset	40 min
Jul 14, 6:33 AM EDT	Special Weather Statement	PHI	Warren	27 min
Jul 14, 6:35 AM EDT	Special Weather Statement	PHI	Middlesex	25 min
Jul 14, 6:40 AM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	50 min
Jul 14, 6:55 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	50 min
Jul 14, 6:59 AM EDT	Special Weather Statement	PHI	Warren	31 min
Jul 14, 7:22 AM EDT	Special Weather Statement	PHI	Sussex	23 min
Jul 14, 7:27 AM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex	18 min
Jul 14, 7:41 AM EDT	Special Weather Statement	PHI	Sussex	34 min
Jul 14, 4:21 PM EDT	Special Weather Statement	PHI	Somerset	39 min
Jul 14, 4:54 PM EDT	Special Weather Statement	PHI	Somerset	51 min
Jul 14, 6:06 PM EDT	Special Weather Statement	PHI	Morris	24 min
Jul 14, 6:07 PM EDT	Special Weather Statement	PHI	Warren	38 min
Jul 14, 6:20 PM EDT	Special Weather Statement	PHI	Sussex	25 min
Jul 14, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Warren	38 min
Jul 14, 6:26 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	49 min
Jul 14, 6:46 PM EDT	Special Weather Statement	PHI	Sussex	29 min
Jul 14, 6:52 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	53 min
Jul 14, 7:03 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	41 min
Jul 14, 7:08 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	39 min
Jul 14, 7:20 PM EDT	Special Weather Statement	PHI	Warren	25 min
Jul 14, 7:40 PM EDT	Flash Flood Warning	PHI	Morris, Sussex, Warren	6 hr
Jul 14, 7:46 PM EDT	Areal Flood Advisory	PHI	Sussex	2 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2023 Every severe thunderstorm warning in 2023

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.