Alert archive / New York / Mesoscale Discussions in 2017
Mesoscale Discussion 763
The Storm Prediction Center issued this mesoscale discussion at May 18, 2017, 5:36 PM EDT for 38 counties in New York; 4 counties in Pennsylvania; 13 counties in Vermont. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- May 18, 2017, 5:36 PM EDT (21:36 UTC)
- Expired
- May 18, 2017, 7:00 PM EDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 55 counties
Albany County, NY, Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Cayuga County, NY, Chemung County, NY, Chenango County, NY, Clinton County, NY, Cortland County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Seneca County, NY, St. Lawrence County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Warren County, NY, Washington County, NY, Wayne County, NY, Yates County, NY, McKean County, PA, Potter County, PA, Tioga County, PA, Warren County, PA, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT
The radar
The Ft Drum radar (KTYX), 79 km from the middle of the area, began a volume at 21:38 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 12:00Z, 9.6 hours before the alert went out and 170 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
- 2076 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 112 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 |
|---|---|---|---|---|
| May 18, 2:04 PM EDT | Mesoscale Discussion | SPC | Albany, Allegany, Broome, Cattaraugus, Cayuga, Chautauqua and 35 more | 116 min |
| May 18, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | Albany, Allegany, Broome, Cattaraugus, Cayuga, Chautauqua and 36 more | 6 hr |
| May 18, 7:33 PM EDT | Mesoscale Discussion | SPC | Albany, Broome, Chemung, Chenango, Columbia, Cortland and 14 more | 87 min |
| May 18, 4:35 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 5 more | 85 min |
Nearby
Mesoscale Discussions in New York, 2017Mesoscale Discussions in Vermont, 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.