Alert archive / New Jersey / Mesoscale Discussions in 2013
Mesoscale Discussion 543
The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2013, 7:12 PM EDT for 4 states. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2013, 7:12 PM EDT (23:12 UTC)
- Expired
- Apr 19, 2013, 8:45 PM EDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 37 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Atlantic County, NJ, Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Essex County, NJ, Gloucester 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, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Bronx County, NY, Kings County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Richmond County, NY, Rockland County, NY, Westchester County, NY, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 37 km from the middle of the area, began a volume at 23:15 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.2 hours before the alert went out and 184 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
- 2 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 615 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 3:36 PM EDT | Mesoscale Discussion | SPC | Warren | 54 min |
| Apr 19, 3:55 PM EDT | Tornado Watch | SPC | Sullivan | 6 hr |
| Apr 19, 4:45 PM EDT | Mesoscale Discussion | SPC | Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 15 more | 60 min |
| Apr 19, 6:02 PM EDT | Mesoscale Discussion | SPC | Broome | 58 min |
| Apr 19, 1:27 PM EDT | Mesoscale Discussion | SPC | Adams, Chester, Lancaster, York | 63 min |
Nearby
Mesoscale Discussions in New Jersey, 2013Mesoscale Discussions in New York, 2013Mesoscale Discussions in Pennsylvania, 2013Every mesoscale discussion in 2013
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.