Alert archive / New Jersey / Mesoscale Discussions in 2017
Mesoscale Discussion 1372
The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2017, 7:48 PM EDT for 14 counties in New Jersey; 6 counties in New York; 5 counties in Pennsylvania. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2017, 7:48 PM EDT (23:48 UTC)
- Expired
- Jul 20, 2017, 9:15 PM EDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 25 counties
Bergen County, NJ, Burlington County, NJ, Essex County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Passaic County, NJ, Somerset County, NJ, Union County, NJ, Warren County, NJ, Bronx County, NY, Kings County, NY, New York County, NY, Queens County, NY, Richmond County, NY, Rockland County, NY, Bucks County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 23:49 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, 11.8 hours before the alert went out and 163 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
- 14 J/kg
- Mixed-layer CIN
- -148 J/kg
- Mixed-layer LCL
- 1647 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 4:33 PM EDT | Mesoscale Discussion | SPC | Bergen, Essex, Hudson, Hunterdon, Middlesex, Morris and 5 more | 87 min |
| Jul 20, 5:03 PM EDT | Severe Thunderstorm Watch | SPC | Bergen, Burlington, Camden, Essex, Hudson, Hunterdon and 10 more | 5 hr |
| Jul 20, 11:36 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Chemung, Erie, Genesee and 10 more | 114 min |
| Jul 20, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Broome, Cayuga, Chemung, Chenango, Cortland and 14 more | 6 hr |
| Jul 20, 3:03 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cayuga, Chemung, Chenango, Cortland and 13 more | 87 min |
| Jul 20, 3:50 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 10 more | 2 hr |
Nearby
Mesoscale Discussions in New Jersey, 2017Mesoscale Discussions in New York, 2017Mesoscale Discussions in Pennsylvania, 2017Every mesoscale discussion in 2017
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.