Alert archive / New Jersey / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 200, NWS Philadelphia/Mount Holly

July 15, 2023Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 15, 2023, 3:22 PM EDT for Middlesex County, Somerset County, New Jersey. It was in force for 38 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
Jul 15, 2023, 3:22 PM EDT (19:22 UTC)
Expired
Jul 15, 2023, 4:00 PM EDT
In force
38 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Middlesex County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 54 km from the middle of the area, began a volume at 19:23 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.4 hours before the alert went out and 152 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2023-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1125 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2023-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1125 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
596 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.4

Open this sounding in Storm Lab

The text

As transmitted.

265 
WUUS51 KPHI 151922
SVRPHI
NJC023-035-152000-
/O.NEW.KPHI.SV.W.0200.230715T1922Z-230715T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
322 PM EDT Sat Jul 15 2023

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Somerset County in northern New Jersey...
  Central Middlesex County in northern New Jersey...

* Until 400 PM EDT.

* At 322 PM EDT, a severe thunderstorm was located over Kendall Park,
  or near New Brunswick, moving northeast at 10 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...
  New Brunswick, Somerset, East Brunswick, South Brunswick, North
  Brunswick, Middlesex, Rocky Hill, Millstone, Kingston, Dayton,
  Kendall Park, Society Hill, North Brunswick Township, Belle Mead,
  South River, Highland Park, Dunellen, Milltown, South Bound Brook
  and Monmouth Junction.

This includes the following highways...
 New Jersey Turnpike near exit 10.
 Interstate 287 in New Jersey between mile markers 5 and 11.

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 4034 7458 4037 7462 4038 7462 4039 7464
      4046 7467 4060 7446 4044 7431
TIME...MOT...LOC 1922Z 237DEG 11KT 4044 7455 

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

$$

Staarmann
1 follow-up statement
040 
WWUS51 KPHI 151945
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
345 PM EDT Sat Jul 15 2023

NJC023-035-152000-
/O.CON.KPHI.SV.W.0200.000000T0000Z-230715T2000Z/
Somerset NJ-Middlesex NJ-
345 PM EDT Sat Jul 15 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHEASTERN SOMERSET AND CENTRAL MIDDLESEX COUNTIES...

At 345 PM EDT, a severe thunderstorm was located over North Brunswick
Township, or near New Brunswick, moving northeast at 10 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...
New Brunswick, Somerset, East Brunswick, South Brunswick, North
Brunswick, Middlesex, Society Hill, North Brunswick Township, Dayton,
Kendall Park, South River, Highland Park, Dunellen, Milltown, South
Bound Brook and Monmouth Junction.

This includes the following highways...
 New Jersey Turnpike near exit 10.
 Interstate 287 in New Jersey between mile markers 5 and 11.

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 4038 7453 4046 7460 4057 7450 4060 7446
      4044 7431 4039 7446
TIME...MOT...LOC 1945Z 240DEG 7KT 4046 7451 

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

$$

Staarmann

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 8:05 PM EDTSpecial Weather StatementPHIMorris40 min
Jul 14, 8:29 PM EDTFlash Flood WarningPHIMorris4 hr
Jul 14, 9:13 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset, Warren3 hr
Jul 14, 9:51 PM EDTSpecial Weather StatementPHIMorris, Somerset24 min
Jul 14, 9:57 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Morris, Somerset41 min
Jul 14, 11:32 PM EDTSpecial Weather StatementPHIMercer, Monmouth28 min
Jul 15, 3:44 AM EDTFlood WatchPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more38 hr
Jul 15, 1:33 PM EDTSpecial Marine WarningPHI57 min
Jul 15, 1:43 PM EDTSpecial Weather StatementPHISalem32 min
Jul 15, 2:56 PM EDTSpecial Weather StatementPHIMercer34 min
Jul 15, 3:08 PM EDTSpecial Weather StatementPHIHunterdon37 min
Jul 15, 3:29 PM EDTSpecial Marine WarningPHI61 min
Jul 15, 3:30 PM EDTSpecial Weather StatementPHISalem30 min
Jul 15, 3:40 PM EDTSevere Thunderstorm WarningPHICumberland, Salem65 min
Jul 15, 4:08 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Somerset67 min
Jul 15, 4:11 PM EDTSpecial Weather StatementPHIGloucester34 min
Jul 15, 4:31 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer106 min
Jul 15, 4:52 PM EDTSpecial Weather StatementPHICumberland23 min
Jul 15, 4:53 PM EDTSpecial Weather StatementPHIMiddlesex37 min
Jul 15, 5:00 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Somerset2 hr
Jul 15, 5:12 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex63 min
Jul 15, 5:18 PM EDTFlash Flood WarningPHIHunterdon, Mercer, Middlesex, Somerset4 hr
Jul 15, 5:27 PM EDTAreal Flood AdvisoryPHICumberland, Salem99 min
Jul 15, 5:45 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren45 min
Jul 15, 5:49 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth41 min
Jul 15, 6:09 PM EDTFlash Flood Warning Considerable damage threatPHIMercer4 hr
Jul 15, 6:21 PM EDTSpecial Weather StatementPHIMercer24 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2023Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.