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 Feb 18, 2021, 10:43 AM EST for 5 counties in New Jersey; 5 counties in Pennsylvania. It was in force for 62 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
- Feb 18, 2021, 10:43 AM EST (15:43 UTC)
- Expired
- Feb 18, 2021, 11:45 AM EST
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Somerset County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 47 km from the middle of the area, began a volume at 15:46 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, 3.7 hours before the alert went out and 174 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1468 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 406 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
339
WWUS81 KPHI 181543
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
1043 AM EST Thu Feb 18 2021
DEZ001-NJZ007>010-012>020-026-PAZ060>062-070-071-101>106-181645-
New Castle-Salem-Camden-Coastal Ocean-Mercer-Northwestern
Burlington-Ocean-Morris-Hunterdon-Eastern Monmouth-Western
Monmouth-Somerset-Middlesex-Warren-Gloucester-Lower
Bucks-Lehigh-Eastern Montgomery-Northampton-Upper Bucks-Western
Montgomery-Delaware-Eastern Chester-Western
Chester-Philadelphia-Berks-
1043 AM EST Thu Feb 18 2021
...AN AREA OF HEAVY SNOW WILL AFFECT NORTHERN NEW CASTLE...NORTHERN
OCEAN...NORTHWESTERN CAMDEN...SOUTHWESTERN WARREN...MERCER...
SOMERSET...NORTHWESTERN SALEM...SOUTH CENTRAL MORRIS...HUNTERDON...
NORTHWESTERN GLOUCESTER...NORTHERN BURLINGTON...MONMOUTH...
MIDDLESEX...MONTGOMERY...SOUTHEASTERN BERKS...SOUTHEASTERN LEHIGH...
BUCKS...CHESTER...PHILADELPHIA...SOUTHEASTERN NORTHAMPTON AND
DELAWARE COUNTIES...
At 1042 AM EST, an area of heavy snow was located along a line
extending from near Coatesville to Lawrenceville.
Snowfall rates of around an inch and a half per hour will be common
within this band. Given temperatures in the 20s and the cold ground,
road conditions will rapidly deteriorate. In addition, the
visibility will be reduced to one quarter of a mile within the heavy
snow.
Be prepared for snow covered roads. Slow down and allow extra time
when traveling.
Locations impacted include...
Philadelphia, Toms River, Reading, Trenton, Camden, Wilmington, New
Brunswick, Perth Amboy, Newark, Long Branch, Easton, West Chester,
Asbury Park, Somerville, Gloucester City, Sandy Hook, Somerset,
Edison, Lakewood and Bethlehem.
This includes the following highways...
New Jersey Turnpike between exits 3 and 12.
Pennsylvania Turnpike between mile markers 296 and 359.
Northeast Extension between mile markers 21 and 57.
Interstate 95 in Pennsylvania between mile markers 0 and 40.
Interstate 95 in Delaware between mile markers 6 and 23.
Interstate 76 in Pennsylvania between mile markers 327 and 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 78 in Pennsylvania between mile markers 54 and 76.
Interstate 78 in New Jersey between mile markers 0 and 43.
Interstate 195 in New Jersey between mile markers 0 and 34.
Interstate 295 in New Jersey between mile markers 0 and 76.
Interstate 287 in New Jersey between mile markers 0 and 29.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 0 and 4.
Interstate 476 in Pennsylvania between mile markers 0 and 19.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
Garden State Parkway between mile markers 86 and 133.
Visibilities will drop quickly to less than a quarter of a mile in
this area of heavy snow.
Conditions can deteriorate rapidly in winter weather situations. Be
prepared for snow or ice covered roads. Slow down and allow extra
time when traveling.
LAT...LON 4001 7399 3998 7476 3965 7554 3968 7579
3972 7579 3972 7613 4014 7588 4030 7612
4076 7526 4072 7439 4067 7446 4066 7440
4060 7446 4059 7420 4046 7426 4041 7398
4048 7402 4048 7401 4043 7397
TIME...MOT...LOC 1542Z 217DEG 52KT 3991 7581 4027 7474
$$
BAHThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 5:46 AM EST | Special Weather Statement | PHI | Mercer | 89 min |
| Feb 18, 5:58 AM EST | Special Weather Statement | PHI | Monmouth | 77 min |
| Feb 18, 7:24 AM EST | Special Weather Statement | PHI | Mercer, Middlesex, Monmouth | 51 min |
| Feb 18, 8:24 AM EST | Special Weather Statement | PHI | Mercer, Middlesex, Monmouth | 66 min |
| Feb 18, 12:06 PM EST | Special Weather Statement | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more | 54 min |
Nearby
Special Weather Statements in New Jersey, 2021Special Weather Statements in Pennsylvania, 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.