Alert archive / New Jersey / Special Weather Statements in 2023

Special Weather Statement, NWS Philadelphia/Mount Holly

July 15, 2023Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 15, 2023, 6:21 PM EDT for Mercer County, New Jersey. It was in force for 24 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, 6:21 PM EDT (22:21 UTC)
Expired: Jul 15, 2023, 6:45 PM EDT
In force: 24 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.00 in
Wind: 40

County Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 22:22 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, 10.4 hours before the alert went out and 159 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: 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.

791 
WWUS81 KPHI 152221
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
621 PM EDT Sat Jul 15 2023
 
NJZ012-015-152245-
Middlesex NJ-Mercer NJ-
621 PM EDT Sat Jul 15 2023

...A strong thunderstorm will impact portions of central Mercer and
southwestern Middlesex Counties through 645 PM EDT...

At 620 PM EDT, a mesonet weather station reported a strong 
thunderstorm over Lawrenceville, or near Trenton, moving northeast 
at 25 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Mesonet.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Trenton, Ewing, Princeton, Hightstown, Cranbury, Edinburg, Princeton
Meadows, Windsor, Kingston, Twin Rivers, Mercerville-Hamilton Square,
Plainsboro Center, Lawrenceville, Kendall Park, White Horse,
Princeton Junction, Princeton North, Heathcote and Monmouth Junction.

This includes the following highways...
 New Jersey Turnpike near exit 8A.
 Interstate 295 in New Jersey between mile markers 62 and 72.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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

&&

LAT...LON 4024 7449 4019 7476 4028 7481 4039 7463
      4037 7461 4040 7459 4042 7458 4042 7457
      4025 7448
TIME...MOT...LOC 2220Z 245DEG 20KT 4027 7472 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 8:05 PM EDT	Special Weather Statement	PHI	Morris	40 min
Jul 14, 8:29 PM EDT	Flash Flood Warning	PHI	Morris	4 hr
Jul 14, 9:13 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Warren	3 hr
Jul 14, 9:51 PM EDT	Special Weather Statement	PHI	Morris, Somerset	24 min
Jul 14, 9:57 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	41 min
Jul 14, 11:32 PM EDT	Special Weather Statement	PHI	Mercer, Monmouth	28 min
Jul 15, 3:44 AM EDT	Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	38 hr
Jul 15, 1:33 PM EDT	Special Marine Warning	PHI		57 min
Jul 15, 1:43 PM EDT	Special Weather Statement	PHI	Salem	32 min
Jul 15, 2:56 PM EDT	Special Weather Statement	PHI	Mercer	34 min
Jul 15, 3:08 PM EDT	Special Weather Statement	PHI	Hunterdon	37 min
Jul 15, 3:22 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	38 min
Jul 15, 3:29 PM EDT	Special Marine Warning	PHI		61 min
Jul 15, 3:30 PM EDT	Special Weather Statement	PHI	Salem	30 min
Jul 15, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	65 min
Jul 15, 4:08 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset	67 min
Jul 15, 4:11 PM EDT	Special Weather Statement	PHI	Gloucester	34 min
Jul 15, 4:31 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	106 min
Jul 15, 4:52 PM EDT	Special Weather Statement	PHI	Cumberland	23 min
Jul 15, 4:53 PM EDT	Special Weather Statement	PHI	Middlesex	37 min
Jul 15, 5:00 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Somerset	2 hr
Jul 15, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex	63 min
Jul 15, 5:18 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	4 hr
Jul 15, 5:27 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	99 min
Jul 15, 5:45 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	45 min
Jul 15, 5:49 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	41 min
Jul 15, 6:09 PM EDT	Flash Flood Warning Considerable damage threat	PHI	Mercer	4 hr
Jul 14, 8:50 PM EDT	Areal Flood Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	3 hr
Jul 15, 1:46 PM EDT	Special Weather Statement	PHI	Montgomery	29 min
Jul 15, 3:35 PM EDT	Special Weather Statement	PHI	Berks	25 min
Jul 15, 3:51 PM EDT	Special Weather Statement	PHI	Bucks	24 min
Jul 15, 7:46 PM EDT	Special Weather Statement	PHI	Carbon	29 min
Jul 15, 7:53 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	52 min
Jul 15, 1:48 PM EDT	Special Weather Statement	PHI	New Castle	27 min

Nearby

Special Weather Statements in New Jersey, 2023 Every special weather statement 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.