Alert archive / Vermont / Mesoscale Discussions in 2011
Mesoscale Discussion 1676
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2011, 3:17 PM EDT for 4 states. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2011, 3:17 PM EDT (19:17 UTC)
- Expired
- Jul 21, 2011, 4:15 PM EDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 33 counties
Androscoggin County, ME, Cumberland County, ME, Oxford County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH, Sullivan County, NH, Clinton County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Hamilton County, NY, Herkimer County, NY, Saratoga County, NY, Warren County, NY, Washington County, NY, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Essex 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 Burlington radar (KCXX), 63 km from the middle of the area, began a volume at 19:18 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, 7.3 hours before the alert went out and 157 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
- 494 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1105 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 9:09 PM EDT | Mesoscale Discussion | SPC | Aroostook, Penobscot, Piscataquis, Somerset | 96 min |
| Jul 21, 12:14 PM EDT | Mesoscale Discussion | SPC | Franklin, Oxford, Piscataquis, Somerset | 2 hr |
| Jul 21, 12:36 PM EDT | Severe Thunderstorm Watch | SPC | Aroostook, Franklin, Hancock, Penobscot, Piscataquis, Somerset and 1 more | 5 hr |
| Jul 21, 4:33 PM EDT | Mesoscale Discussion | SPC | Franklin, Penobscot, Piscataquis, Somerset, Washington | 57 min |
Nearby
Mesoscale Discussions in Vermont, 2011Mesoscale Discussions in New York, 2011Mesoscale Discussions in New Hampshire, 2011Every mesoscale discussion in 2011
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.