Alert archive / New Jersey / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

September 23, 2021Burlington County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Sep 23, 2021, 3:50 PM EDT for Burlington County, New Jersey. It was in force for 25 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: Sep 23, 2021, 3:50 PM EDT (19:50 UTC)
Expired: Sep 23, 2021, 4:15 PM EDT
In force: 25 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.00 in
Wind: 40

County Burlington County, NJ

The radar

The Philadelphia radar (KDIX), 13 km from the middle of the area, began a volume at 19:52 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, 7.8 hours before the alert went out and 172 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: 103 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 687 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 249 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

170 
WWUS81 KPHI 231950
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
350 PM EDT Thu Sep 23 2021
 
NJZ012-013-015-019-020-027-232015-
Northwestern Burlington NJ-Ocean NJ-Western Monmouth NJ-Middlesex NJ-
Mercer NJ-Southeastern Burlington NJ-
350 PM EDT Thu Sep 23 2021

...Strong thunderstorms will impact portions of northwestern Ocean,
southeastern Mercer, eastern Burlington, southwestern Monmouth and
southwestern Middlesex Counties through 415 PM EDT...

At 349 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Crosswicks to near Wrightstown to near
Penn State Forest. Movement was north at 45 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
South Brunswick, Hightstown, Cranbury, Presidential Lakes Estates,
Allentown, Roosevelt, Wrightstown, Princeton Meadows, Windsor,
Dayton, Six Flags Theme Park, Plainsboro Center, Chatsworth,
Georgetown, Clearbrook Park, Clarksburg, Edinburg, Crosswicks,
Presidential Lakes and Woodruff.

This includes the following highways...
 New Jersey Turnpike between exits 8 and 9.
 Interstate 195 in New Jersey between mile markers 3 and 16.

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 3961 7451 3959 7455 3984 7467 3999 7461
      4015 7470 4042 7458 4044 7453 4033 7445
      3999 7441
TIME...MOT...LOC 1949Z 193DEG 38KT 4019 7465 4005 7456 3973 7454 

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
Sep 22, 8:43 PM EDT	Gale Warning	PHI		18 hr
Sep 23, 9:12 AM EDT	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester	10 hr
Sep 23, 11:33 AM EDT	Areal Flood Advisory	PHI	Cumberland, Gloucester, Salem	3 hr
Sep 23, 11:57 AM EDT	Flash Flood Warning	PHI	Gloucester, Salem	3 hr
Sep 23, 12:12 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	48 min
Sep 23, 12:54 PM EDT	Special Weather Statement	PHI	Gloucester	51 min
Sep 23, 12:56 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Hunterdon, Mercer, Warren	3 hr
Sep 23, 1:13 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	47 min
Sep 23, 1:42 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	4 hr
Sep 23, 1:58 PM EDT	Special Weather Statement	PHI	Camden, Hunterdon	32 min
Sep 23, 2:37 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 3 more	3 hr
Sep 23, 2:47 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer	28 min
Sep 23, 2:52 PM EDT	Special Weather Statement	PHI	Camden	23 min
Sep 23, 3:13 PM EDT	Special Weather Statement	PHI	Mercer, Somerset	32 min
Sep 23, 3:16 PM EDT	Special Weather Statement	PHI	Burlington	29 min
Sep 23, 3:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	52 min
Sep 23, 3:26 PM EDT	Flash Flood Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Morris, Somerset	2 hr
Sep 23, 4:21 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Morris, Ocean, Somerset, Sussex	15 min
Sep 23, 4:36 PM EDT	Flash Flood Warning	PHI	Middlesex, Monmouth, Morris, Somerset, Sussex	3 hr
Sep 23, 5:00 PM EDT	Special Weather Statement	PHI	Monmouth	30 min
Sep 23, 10:52 AM EDT	Areal Flood Advisory	PHI	Chester	3 hr
Sep 23, 11:40 AM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Carbon, Lehigh, Montgomery, Northampton	3 hr
Sep 23, 12:28 PM EDT	Flash Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	4 hr
Sep 23, 12:57 PM EDT	Special Weather Statement	PHI	Bucks	33 min
Sep 23, 1:48 PM EDT	River Flood Warning	PHI	Chester	5 hr
Sep 23, 4:26 PM EDT	Areal Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	80 min
Sep 23, 7:18 PM EDT	Areal Flood Warning	PHI	Berks, Montgomery	36 min
Sep 23, 11:11 AM EDT	Special Weather Statement	PHI	New Castle	64 min
Sep 23, 11:42 AM EDT	Severe Thunderstorm Warning	PHI	New Castle	33 min
Sep 23, 8:08 AM EDT	Special Weather Statement	PHI	Kent, Queen Anne's, Talbot	52 min
Sep 23, 9:03 AM EDT	Areal Flood Advisory	PHI	Kent, Queen Anne's, Talbot	3 hr
Sep 23, 9:31 AM EDT	Special Weather Statement	PHI	Kent, Queen Anne's, Talbot	59 min
Sep 23, 9:46 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	44 min
Sep 23, 9:49 AM EDT	Flash Flood Warning	PHI	Kent, Queen Anne's, Talbot	4 hr
Sep 23, 10:35 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	40 min
Sep 23, 10:55 AM EDT	Areal Flood Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	3 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.