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 Jul 27, 2021, 7:07 PM EDT for Hunterdon County, Somerset County, New Jersey; Northampton County, Pennsylvania. It was in force for 23 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
- Jul 27, 2021, 7:07 PM EDT (23:07 UTC)
- Expired
- Jul 27, 2021, 7:30 PM EDT
- In force
- 23 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Hunterdon County, NJ, Somerset County, NJ, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 81 km from the middle of the area, began a volume at 23:07 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, 11.1 hours before the alert went out and 142 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
- 2105 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
318
WWUS81 KPHI 272307
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
707 PM EDT Tue Jul 27 2021
NJZ007>010-012-PAZ062-105-272330-
Hunterdon-Morris-Somerset-Middlesex-Warren-Upper Bucks-Northampton-
707 PM EDT Tue Jul 27 2021
...AN OUTFLOW BOUNDARY FROM PREVIOUS THUNDERSTORMS WILL AFFECT
HUNTERDON...SOUTHERN MORRIS...SOUTHWESTERN WARREN...NORTHERN
SOMERSET...NORTHEASTERN MIDDLESEX...NORTH CENTRAL BUCKS AND CENTRAL
NORTHAMPTON COUNTIES...
At 706 PM EDT, radar indicated an outflow boundary from previous
thunderstorms was located along a line extending from Florham Park
to near Califon to Tatamy. Movement was southeast at 25 mph.
Wind gusts up to 40 mph are possible with these showers. Little or
no rain is expected.
Locations impacted include...
Easton, Morristown, Somerville, Bridgewater, Madison, Forks,
Middlesex, Florham Park, Bound Brook, Manville, Chatham, Wilson,
Washington, Nazareth, Mendham, High Bridge, Clinton, Harmony, Peapack
And Gladstone and Alpha.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 70 and 76.
Interstate 78 in New Jersey between mile markers 0 and 43.
Interstate 287 in New Jersey between mile markers 7 and 8, and
between mile markers 12 and 36.
Garden State Parkway between mile markers 133 and 134.
If outdoors, consider seeking shelter inside a building.
LAT...LON 4053 7464 4055 7528 4080 7539 4077 7481
4081 7435 4079 7437 4076 7438 4075 7436
4074 7437 4067 7446 4066 7445 4067 7441
4065 7440 4060 7446 4061 7431 4059 7429
4059 7420
TIME...MOT...LOC 2306Z 334DEG 23KT 4077 7436 4073 7479 4075 7527
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 24 min |
| Jul 27, 6:07 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 23 min |
| Jul 27, 6:50 PM EDT | Special Weather Statement | PHI | Morris | 25 min |
| Jul 27, 7:25 PM EDT | Special Weather Statement | PHI | Middlesex, Monmouth, Ocean | 35 min |
| Jul 27, 7:28 PM EDT | Special Weather Statement | PHI | Hunterdon, Middlesex, Somerset | 32 min |
| Jul 27, 7:22 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 42 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.