Alert archive / New Jersey / Special Weather Statements in 2021
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Sep 15, 2021, 8:37 PM EDT for Warren 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
- Sep 15, 2021, 8:37 PM EDT (00:37 UTC)
- Expired
- Sep 15, 2021, 9:15 PM EDT
- In force
- 38 min
- Issued by
- NWS Philadelphia/Mount Holly
- Hail
- 0.25 in
- Wind
- 40
County Warren County, NJ
The radar
The Philadelphia radar (KDIX), 122 km from the middle of the area, began a volume at 00:37 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, 0.6 hours before the alert went out and 170 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.
- Mixed-layer CAPE
- 664 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.4
The text
As transmitted.
874
WWUS81 KPHI 160037
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
837 PM EDT Wed Sep 15 2021
NJZ001-007>009-160115-
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-
837 PM EDT Wed Sep 15 2021
...A strong thunderstorm will impact portions of northern Hunterdon,
southwestern Morris, southwestern Sussex and Warren Counties through
915 PM EDT...
At 837 PM EDT, Doppler radar was tracking a strong thunderstorm over
Great Meadows-Vienna, or 13 miles southwest of Newton, moving east at
35 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...
Newton, Hopatcong, Hackettstown, Washington, Blairstown, Mount
Arlington, Mendham, Stanhope, Netcong, Oxford, Hope, Chester,
Andover, Brass Castle, Lake Mohawk, Greendell, Long Valley, Great
Meadows-Vienna, Allamuchy-Panther Valley and Succasunna.
This includes Interstate 80 in New Jersey between mile markers 8 and
32.
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.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northwestern New Jersey.
&&
LAT...LON 4112 7465 4076 7457 4072 7502 4103 7505
4104 7503 4105 7503 4106 7501
TIME...MOT...LOC 0037Z 255DEG 29KT 4089 7491
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 8:53 PM EDT | Special Weather Statement | PHI | Sussex | 37 min |
| Sep 16, 2:38 AM EDT | Small Craft Advisory | PHI | 65 hr | |
| Sep 16, 2:40 PM EDT | Areal Flood Advisory | PHI | Cumberland, Salem | 3 hr |
| Sep 15, 10:26 PM EDT | Special Weather Statement | PHI | Chester | 49 min |
| Sep 16, 3:19 PM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Sep 15, 10:57 PM EDT | Special Weather Statement | PHI | Kent | 48 min |
Nearby
Special Weather Statements in New Jersey, 2021Every 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.