Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

October 25, 2021Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 25, 2021, 8:26 PM EDT for Mercer County, New Jersey. It was in force for 34 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: Oct 25, 2021, 8:26 PM EDT (00:26 UTC)
Expired: Oct 25, 2021, 9:00 PM EDT
In force: 34 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.25 in
Wind: 40

County Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 24 km from the middle of the area, began a volume at 00:29 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 00:00Z, 0.4 hours before the alert went out and 178 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: 544 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 758 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

199 
WWUS81 KPHI 260026
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
826 PM EDT Mon Oct 25 2021
 
NJZ010-012-013-015-019-PAZ106-260100-
Northwestern Burlington NJ-Western Monmouth NJ-Somerset NJ-
Middlesex NJ-Mercer NJ-Lower Bucks PA-
826 PM EDT Mon Oct 25 2021

...Strong thunderstorms will impact portions of Mercer, northeastern
Burlington, southern Somerset, southwestern Monmouth, southwestern
Middlesex and southeastern Bucks Counties through 900 PM EDT...

At 826 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Crosswicks to near Pemberton. Movement was
north at 40 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Trenton, Ewing, Lumberton, Princeton, Florence, Burlington, Bristol,
Mount Holly, Bordentown, Pennington, Yardley, Tullytown, Allentown,
Pemberton, Wrightstown, Rocky Hill, Washington Crossing, Windsor,
Florence-Roebling and Kingston.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 8.
 Pennsylvania Turnpike between mile markers 357 and 359.
 Interstate 195 in New Jersey between mile markers 0 and 10.
 Interstate 295 in New Jersey between mile markers 48 and 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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

&&

LAT...LON 3987 7470 3986 7476 3984 7476 4029 7493
      4042 7460 4010 7452 4008 7455 4002 7452
TIME...MOT...LOC 0026Z 182DEG 35KT 4012 7462 3995 7472 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

$$

JEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 25, 8:33 PM EDT	Special Weather Statement	PHI	Warren	42 min
Oct 25, 9:09 PM EDT	Special Weather Statement	PHI	Middlesex, Morris, Somerset	51 min
Oct 26, 1:22 AM EDT	Areal Flood Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	5 hr
Oct 26, 2:08 AM EDT	Flash Flood Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	4 hr
Oct 26, 3:08 AM EDT	Flash Flood Warning	PHI	Middlesex, Monmouth, Ocean	8 hr
Oct 26, 4:14 AM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	4 hr
Oct 26, 5:22 AM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	2 hr
Oct 26, 6:09 AM EDT	Areal Flood Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	3 hr
Oct 26, 6:18 AM EDT	Areal Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	13 hr
Oct 26, 7:15 AM EDT	Areal Flood Warning	PHI	Monmouth, Ocean	5 hr
Oct 26, 7:32 AM EDT	River Flood Warning	PHI	Somerset	28 hr
Oct 26, 7:38 AM EDT	Areal Flood Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	37 hr
Oct 26, 8:07 AM EDT	Areal Flood Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	12 hr
Oct 26, 8:18 AM EDT	River Flood Warning	PHI	Morris, Somerset	8 hr
Oct 26, 10:12 AM EDT	River Flood Warning	PHI	Somerset	11 hr
Oct 26, 10:12 AM EDT	River Flood Warning	PHI	Middlesex, Somerset	24 hr
Oct 26, 10:12 AM EDT	River Flood Warning	PHI	Middlesex, Somerset	33 hr
Oct 26, 10:50 AM EDT	Areal Flood Warning	PHI	Middlesex, Monmouth, Ocean	9 hr
Oct 26, 4:24 PM EDT	River Flood Warning	PHI	Morris	31 hr
Oct 26, 4:28 PM EDT	River Flood Warning	PHI	Morris, Passaic	29 hr
Oct 26, 4:39 PM EDT	River Flood Warning	PHI	Essex, Morris, Passaic	54 hr
Oct 26, 4:39 PM EDT	River Flood Warning	PHI	Essex, Passaic	42 hr
Oct 26, 12:31 AM EDT	Areal Flood Warning	PHI	Berks, Chester, Delaware, Montgomery	5 hr
Oct 26, 10:27 AM EDT	Areal Flood Advisory	PHI	Monroe, Northampton	4 hr
Oct 26, 12:20 PM EDT	Areal Flood Warning	PHI	Carbon, Monroe, Northampton	7 hr
Oct 26, 1:53 AM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Oct 25, 11:51 PM EDT	Areal Flood Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	6 hr

Nearby

Special Weather Statements in New Jersey, 2021 Every special weather statement in 2021

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.