Alert archive / Vermont / Mesoscale Discussions in 2008
Mesoscale Discussion 1809
The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2008, 7:30 PM EDT for 5 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2008, 7:30 PM EDT (23:30 UTC)
- Expired
- Jul 18, 2008, 9:00 PM EDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 43 counties
Berkshire County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Oxford County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Clinton County, NY, Essex County, NY, Franklin County, NY, Hamilton County, NY, Rensselaer 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), 90 km from the middle of the area, began a volume at 23:31 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 nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 11.5 hours before the alert went out and 160 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
- 800 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 822 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 18, 12:44 PM EDT | Mesoscale Discussion | SPC | York | 61 min |
| Jul 18, 1:24 PM EDT | Severe Thunderstorm Watch | SPC | Androscoggin, Cumberland, Oxford, Sagadahoc, York | 7 hr |
| Jul 18, 4:10 PM EDT | Mesoscale Discussion | SPC | Berkshire, Franklin | 2 hr |
Nearby
Mesoscale Discussions in Vermont, 2008Mesoscale Discussions in New Hampshire, 2008Mesoscale Discussions in Massachusetts, 2008Every mesoscale discussion in 2008
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.