Alert archive / New Jersey / Snow Squall Warnings in 2019
Snow Squall Warning 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this snow squall warning at Dec 18, 2019, 4:09 PM EST for 6 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 36 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
- Dec 18, 2019, 4:09 PM EST (21:09 UTC)
- Expired
- Dec 18, 2019, 4:45 PM EST
- In force
- 36 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 21:09 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, 9.2 hours before the alert went out and 155 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
- 868 m above ground
- 0-6 km bulk shear
- 119 kt
- 0-1 km storm-relative helicity
- -352 m²/s²
- 0-3 km storm-relative helicity
- -46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
520
WWUS51 KPHI 182109
SQWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
409 PM EST Wed Dec 18 2019
NJC019-021-023-027-035-041-PAC017-182145-
/O.NEW.KPHI.SQ.W.0008.191218T2109Z-191218T2145Z/
Hunterdon NJ-Morris NJ-Warren NJ-Mercer NJ-Somerset NJ-Middlesex NJ-
Bucks PA-
409 PM EST Wed Dec 18 2019
The National Weather Service in Mount Holly NJ has issued a
* Snow Squall Warning for...
Hunterdon County in northwestern New Jersey...
Morris County in northern New Jersey...
Warren County in northwestern New Jersey...
North central Mercer County in central New Jersey...
Somerset County in northern New Jersey...
Northern Middlesex County in northern New Jersey...
North central Bucks County in southeastern Pennsylvania...
* Until 445 PM EST.
* At 409 PM EST, a dangerous snow squall was located along a line
extending from Harrison to Pen Argyl, moving south at 15 mph.
HAZARD...Heavy snow and blowing snow. Wind gusts up to 30 mph.
SOURCE...Radar and webcams.
IMPACT...Dangerous life-threatening travel.
* This includes the following highways...
Garden State Parkway between mile markers 122 and 134.
Interstate 287 in New Jersey between mile markers 0 and 48.
Interstate 78 in New Jersey between mile markers 0 and 42.
Interstate 80 in New Jersey between mile markers 5 and 24, and
between mile markers 26 and 47.
New Jersey Turnpike between exits 10 and 13.
Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerville, Somerset, Edison,
East Brunswick, Bridgewater, Sayreville, North Brunswick, Carteret,
Dover, Madison, Hopatcong, Middlesex, Florham Park, East Hanover,
Bound Brook, Manville and Hackettstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
Slow Down! Rapid changes in visibility and road conditions are
expected with this dangerous snow squall. Be alert for sudden
whiteout conditions.
&&
LAT...LON 4060 7421 4050 7428 4044 7423 4038 7514
4059 7524 4062 7519 4075 7519 4080 7510
4085 7510 4086 7505 4095 7511 4094 7480
4090 7471 4094 7464 4093 7429 4089 7434
4075 7436 4067 7446 4065 7441 4060 7446
TIME...MOT...LOC 2109Z 348DEG 11KT 4075 7417 4087 7528
$$
NC1 follow-up statement
571
WWUS51 KPHI 182145
SQWPHI
Snow Squall Warning
National Weather Service Mount Holly NJ
444 PM EST Wed Dec 18 2019
NJC019-021-023-027-035-041-PAC017-182154-
/O.EXP.KPHI.SQ.W.0008.000000T0000Z-191218T2145Z/
Hunterdon NJ-Morris NJ-Warren NJ-Mercer NJ-Somerset NJ-Middlesex NJ-
Bucks PA-
444 PM EST Wed Dec 18 2019
...THE SNOW SQUALL WARNING FOR HUNTERDON...MORRIS...WARREN...NORTH
CENTRAL MERCER...SOMERSET...NORTHERN MIDDLESEX AND NORTH CENTRAL
BUCKS COUNTIES WILL EXPIRE AT 445 PM EST...
The snow squall which prompted the warning has weakened. Therefore,
the snow squall warning will be allowed to expire. Some light snow
may remain in the warning area temporarily reducing visibilities
under 1 mile.
LAT...LON 4060 7421 4050 7428 4044 7423 4038 7514
4059 7524 4062 7519 4075 7519 4080 7510
4085 7510 4086 7505 4095 7511 4094 7480
4090 7471 4094 7464 4093 7429 4089 7434
4075 7436 4067 7446 4065 7441 4060 7446
TIME...MOT...LOC 2144Z 348DEG 11KT 4066 7414 4078 7525
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 18, 1:29 PM EST | Snow Squall Warning | PHI | Sussex, Warren | 61 min |
| Dec 18, 2:23 PM EST | Snow Squall Warning | PHI | Morris, Sussex, Warren | 67 min |
| Dec 18, 2:44 PM EST | Special Weather Statement | PHI | Camden, Gloucester | 46 min |
| Dec 18, 3:02 PM EST | Snow Squall Warning | PHI | Middlesex, Monmouth, Morris, Somerset | 43 min |
| Dec 18, 3:29 PM EST | Special Weather Statement | PHI | Hunterdon, Somerset, Warren | 46 min |
| Dec 18, 3:44 PM EST | Special Weather Statement | PHI | Hunterdon, Morris, Somerset, Warren | 46 min |
| Dec 18, 4:44 PM EST | Special Weather Statement | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 61 min |
| Dec 18, 5:12 PM EST | Special Weather Statement | PHI | Burlington, Camden, Ocean | 93 min |
Nearby
Snow Squall Warnings in New Jersey, 2019Snow Squall Warnings in Pennsylvania, 2019Every snow squall warning in 2019
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.