Alert archive / Vermont / Mesoscale Discussions in 2017
Mesoscale Discussion 1556
The Storm Prediction Center issued this mesoscale discussion at Aug 22, 2017, 5:49 PM EDT for 4 states. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Aug 22, 2017, 5:49 PM EDT (21:49 UTC)
- Expired
- Aug 22, 2017, 7:45 PM EDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 24 counties
Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Cheshire County, NH, Coos County, NH, Grafton County, NH, Sullivan County, NH, Albany County, NY, Columbia County, NY, Greene County, NY, Rensselaer County, NY, Washington County, NY, Addison County, VT, Bennington County, VT, Caledonia County, VT, Essex 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 Burlington radar (KCXX), 111 km from the middle of the area, began a volume at 21:48 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
Gray, ME (KGYX), launched 12:00Z, 9.8 hours before the alert went out and 154 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
- 1495 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 103 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 |
|---|---|---|---|---|
| Aug 22, 3:55 PM EDT | Severe Thunderstorm Watch | SPC | Berkshire, Franklin, Hampden, Hampshire | 8 hr |
| Aug 22, 2:44 PM EDT | Mesoscale Discussion | SPC | Grafton | 2 hr |
| Aug 22, 11:55 AM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cattaraugus, Cayuga, Chemung, Chenango and 23 more | 3 hr |
| Aug 22, 12:23 PM EDT | Tornado Watch | SPC | Allegany, Broome, Cattaraugus, Cayuga, Chautauqua, Chemung and 36 more | 9 hr |
| Aug 22, 3:08 PM EDT | Mesoscale Discussion | SPC | Delaware, Dutchess, Orange, Putnam, Rockland, Sullivan and 1 more | 67 min |
| Aug 22, 4:19 PM EDT | Severe Thunderstorm Watch | SPC | Delaware, Orange, Putnam, Rockland, Sullivan, Westchester | 8 hr |
| Aug 22, 4:48 PM EDT | Mesoscale Discussion | SPC | Broome, Cayuga, Chemung, Chenango, Clinton, Cortland and 21 more | 87 min |
| Aug 22, 7:07 PM EDT | Mesoscale Discussion | SPC | Bronx, Columbia, Delaware, Dutchess, Greene, Kings and 8 more | 113 min |
Nearby
Mesoscale Discussions in Vermont, 2017Mesoscale Discussions in New York, 2017Mesoscale Discussions in Massachusetts, 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.