Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

August 10, 2021Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 10, 2021, 6:59 PM EDT for Middlesex County, Monmouth County, 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: Aug 10, 2021, 6:59 PM EDT (22:59 UTC)
Expired: Aug 10, 2021, 7:30 PM EDT
In force: 31 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.25 in
Wind: 40

Counties Middlesex County, NJ, Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 23:02 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, 11.0 hours before the alert went out and 126 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: 73 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 635 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

859 
WWUS81 KPHI 102259
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
659 PM EDT Tue Aug 10 2021
 
NJZ012>015-019-020-PAZ106-102330-
Northwestern Burlington NJ-Eastern Monmouth NJ-Ocean NJ-
Western Monmouth NJ-Middlesex NJ-Mercer NJ-Lower Bucks PA-
659 PM EDT Tue Aug 10 2021

...Strong thunderstorms will impact portions of northwestern Ocean,
southeastern Mercer, northeastern Burlington, Monmouth, Middlesex and
southeastern Bucks Counties through 730 PM EDT...

At 659 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Huguenot to near Clarksburg to Willingboro.
Movement was east at 25 mph.

HAZARD...Winds in excess of 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, New Brunswick, Perth Amboy, Long Branch, Asbury Park, Sandy
Hook, Edison, Lakewood, Middletown, Old Bridge, Jackson, Howell, East
Brunswick, Sayreville, Marlboro, Manalapan, Carteret, Tinton Falls,
Holmdel and Red Bank.

This includes the following highways...
 New Jersey Turnpike between exits 5 and 12.
 Pennsylvania Turnpike between mile markers 357 and 359.
 Interstate 95 in Pennsylvania between mile markers 36 and 40.
 Interstate 195 in New Jersey between mile markers 0 and 34.
 Interstate 295 in New Jersey between mile markers 47 and 63.
 Interstate 287 in New Jersey between mile markers 0 and 3.
 Garden State Parkway between mile markers 95 and 134.

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 4021 7396 4018 7399 3992 7459 4008 7496
      4031 7457 4061 7435 4059 7421 4056 7421
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4046 7418 4041 7398 4048 7402
      4048 7401 4043 7397
TIME...MOT...LOC 2259Z 275DEG 23KT 4055 7419 4021 7441 4004 7489 

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

$$

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 1:02 AM EDT	Special Weather Statement	PHI	Burlington	28 min
Aug 10, 3:33 AM EDT	Excessive Heat Warning	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more	4 days
Aug 10, 3:33 AM EDT	Heat Advisory	PHI	Atlantic, Cape May, Cumberland, Monmouth, Ocean, Salem and 2 more	4 days
Aug 10, 3:54 AM EDT	Areal Flood Advisory	PHI	Atlantic	80 min
Aug 10, 4:59 AM EDT	Areal Flood Advisory	PHI	Burlington	60 min
Aug 10, 5:58 AM EDT	Flash Flood Warning	PHI	Burlington, Mercer	2 hr
Aug 10, 2:07 PM EDT	Special Weather Statement	PHI	Salem	38 min
Aug 10, 4:52 PM EDT	Special Weather Statement	PHI	Monmouth	23 min
Aug 10, 4:54 PM EDT	Special Marine Warning	PHI		26 min
Aug 10, 5:05 PM EDT	Special Weather Statement	PHI	Somerset, Warren	25 min
Aug 10, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Somerset, Warren	51 min
Aug 10, 5:30 PM EDT	Special Weather Statement	PHI	Warren	30 min
Aug 10, 5:58 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Morris, Somerset, Warren	32 min
Aug 10, 6:27 PM EDT	Special Weather Statement	PHI	Burlington, Mercer, Middlesex, Monmouth, Morris	33 min
Aug 10, 7:09 PM EDT	Special Marine Warning	PHI		66 min
Aug 10, 7:27 PM EDT	Special Weather Statement	PHI	Monmouth	33 min
Aug 9, 10:10 PM EDT	Areal Flood Advisory	PHI	Carbon	3 hr
Aug 10, 3:06 PM EDT	Special Weather Statement	PHI	Berks	24 min
Aug 10, 3:33 PM EDT	Special Weather Statement	PHI	Berks	27 min
Aug 10, 3:52 PM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh	23 min
Aug 10, 4:01 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Chester, Lehigh, Montgomery, Northampton	44 min
Aug 10, 4:18 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh	3 hr
Aug 10, 4:33 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more	42 min
Aug 10, 5:11 PM EDT	Special Weather Statement	PHI	Chester, Montgomery, Philadelphia	34 min
Aug 10, 5:40 PM EDT	Special Weather Statement	PHI	Chester	35 min
Aug 10, 6:36 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	39 min
Aug 10, 7:10 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	65 min
Aug 10, 7:54 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Chester	51 min
Aug 10, 7:12 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	33 min
Aug 10, 7:42 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's, Talbot	33 min

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.