Alert archive / New York / Mesoscale Discussions in 2018
Mesoscale Discussion 359
The Storm Prediction Center issued this mesoscale discussion at May 4, 2018, 8:50 PM EDT for 6 states. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- May 4, 2018, 8:50 PM EDT (00:50 UTC)
- Expired
- May 4, 2018, 10:15 PM EDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 45 counties
Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA, Cheshire County, NH, Hillsborough County, NH, Merrimack County, NH, Sullivan County, NH, Sussex County, NJ, Albany County, NY, Broome County, NY, Chenango County, NY, Columbia County, NY, Delaware County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Montgomery County, NY, Orange County, NY, Otsego County, NY, Putnam County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Ulster County, NY, Washington County, NY, Carbon County, PA, Columbia County, PA, Lackawanna County, PA, Luzerne County, PA, Monroe County, PA, Montour County, PA, Northumberland County, PA, Pike County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Union County, PA, Wayne County, PA, Wyoming County, PA, Bennington County, VT, Windham County, VT
The radar
The Albany radar (KENX), 39 km from the middle of the area, began a volume at 00:54 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
Albany, NY (KALY), launched 00:00Z, 0.8 hours before the alert went out and 55 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
- 360 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 1408 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- 441 m²/s²
- 0-3 km storm-relative helicity
- 455 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 6.3
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 |
|---|---|---|---|---|
| May 4, 8:23 PM EDT | Mesoscale Discussion | SPC | Blair, Cambria, Centre, Columbia, Fayette, Greene and 8 more | 67 min |
| May 4, 8:53 PM EDT | Mesoscale Discussion | SPC | Addison, Caledonia, Chittenden, Essex, Franklin, Grand Isle and 6 more | 97 min |
Nearby
Mesoscale Discussions in New York, 2018Mesoscale Discussions in Pennsylvania, 2018Mesoscale Discussions in Massachusetts, 2018Every mesoscale discussion in 2018
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.