Alert archive / New York / Mesoscale Discussions in 2017
Mesoscale Discussion 1209
The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2017, 12:32 PM EDT for 4 states. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jul 1, 2017, 12:32 PM EDT (16:32 UTC)
- Expired
- Jul 1, 2017, 2:30 PM EDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 30 counties
Berkshire County, MA, Franklin County, MA, Hampshire County, MA, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH, Sullivan County, NH, Albany County, NY, Columbia County, NY, Fulton County, NY, Greene County, NY, Montgomery County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Warren County, NY, Washington County, NY, Addison County, VT, Bennington County, VT, Caledonia County, VT, Essex County, VT, Orange County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT
The radar
The Albany radar (KENX), 99 km from the middle of the area, began a volume at 16:31 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, 4.5 hours before the alert went out and 79 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
- 285 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 657 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.5
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 1, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | Berkshire, Franklin, Hampden, Hampshire, Worcester | 8 hr |
| Jul 1, 4:10 PM EDT | Mesoscale Discussion | SPC | Berkshire, Franklin, Hampden, Hampshire, Worcester | 2 hr |
| Jul 1, 12:54 PM EDT | Mesoscale Discussion | SPC | Broome, Chemung, Cortland, Schuyler, Tioga, Tompkins | 66 min |
Nearby
Mesoscale Discussions in New York, 2017Mesoscale Discussions in Vermont, 2017Mesoscale Discussions in New Hampshire, 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.