Alert archive / New York / Mesoscale Discussions in 2017
Mesoscale Discussion 627
The Storm Prediction Center issued this mesoscale discussion at May 1, 2017, 6:29 PM EDT for 26 counties in New York; 4 counties in Vermont. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- May 1, 2017, 6:29 PM EDT (22:29 UTC)
- Expired
- May 1, 2017, 7:30 PM EDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 30 counties
Albany County, NY, Chenango County, NY, Clinton County, NY, Columbia County, NY, Delaware County, NY, Dutchess County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Lewis County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, St. Lawrence County, NY, Sullivan County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Addison County, VT, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT
The radar
The Ft Drum radar (KTYX), 102 km from the middle of the area, began a volume at 22:32 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
Albany, NY (KALY), launched 12:00Z, 10.5 hours before the alert went out and 135 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
- 581 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 246 m²/s²
- 0-3 km storm-relative helicity
- 201 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 1, 1:41 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Genesee, Livingston, Ontario, Steuben and 2 more | 64 min |
| May 1, 2:12 PM EDT | Tornado Watch | SPC | Allegany, Broome, Cattaraugus, Cayuga, Chautauqua, Chemung and 23 more | 8 hr |
| May 1, 4:36 PM EDT | Mesoscale Discussion | SPC | Broome, Cayuga, Chemung, Chenango, Cortland, Madison and 11 more | 84 min |
| May 1, 6:52 PM EDT | Severe Thunderstorm Watch | SPC | Albany, Columbia, Delaware, Dutchess, Essex, Franklin and 15 more | 4 hr |
| May 1, 7:16 PM EDT | Mesoscale Discussion | SPC | New York, Richmond, Rockland, Westchester | 2 hr |
Nearby
Mesoscale Discussions in New York, 2017Mesoscale Discussions in Vermont, 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.