Alert archive / Vermont / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 494
The Storm Prediction Center issued this severe thunderstorm watch at Jul 9, 2007, 11:18 AM EDT for 6 counties in New Hampshire; 4 counties in New York; 12 counties in Vermont. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2007, 11:18 AM EDT (15:18 UTC)
- Expired
- Jul 9, 2007, 5:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 22 counties
Belknap County, NH, Carroll County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH, Sullivan County, NH, Clinton County, NY, Essex County, NY, Franklin County, NY, St. Lawrence County, NY, Addison 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, Windsor County, VT
The radar
The Burlington radar (KCXX), 3 km from the middle of the area, began a volume at 15:20 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 12:20 PM EDT | Severe Thunderstorm Warning | BTV | Addison | 55 min |
| Jul 9, 1:06 PM EDT | Severe Thunderstorm Warning | BTV | Orange | 54 min |
| Jul 9, 1:35 PM EDT | Severe Thunderstorm Warning | GYX | Grafton | 40 min |
| Jul 9, 2:06 PM EDT | Severe Thunderstorm Warning | GYX | Carroll | 39 min |
| Jul 9, 2:43 PM EDT | Severe Thunderstorm Warning | GYX | Merrimack | 17 min |
| Jul 9, 4:47 PM EDT | Severe Thunderstorm Warning | BTV | Franklin, St. Lawrence | 58 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 10:56 AM EDT | Mesoscale Discussion | SPC | Coos, Grafton, Sullivan | 64 min |
| Jul 9, 2:20 PM EDT | Mesoscale Discussion | SPC | Cheshire, Hillsborough, Merrimack, Rockingham, Strafford, Sullivan | 85 min |
| Jul 9, 4:03 PM EDT | Mesoscale Discussion | SPC | Belknap, Carroll, Coos, Grafton, Hillsborough, Merrimack and 1 more | 117 min |
| Jul 9, 5:48 PM EDT | Severe Thunderstorm Watch | SPC | Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 3 more | 6 hr |
| Jul 9, 12:49 AM EDT | Mesoscale Discussion | SPC | Albany, Chenango, Fulton, Greene, Herkimer, Lewis and 9 more | 56 min |
| Jul 9, 1:25 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Cayuga, Chemung, Cortland, Fulton and 13 more | 95 min |
| Jul 9, 1:50 PM EDT | Severe Thunderstorm Watch | SPC | Albany, Allegany, Broome, Cattaraugus, Cayuga, Chautauqua and 38 more | 7 hr |
| Jul 9, 4:42 PM EDT | Severe Thunderstorm Watch | SPC | Clinton, Essex, Franklin, St. Lawrence | 6 hr |
Nearby
Severe Thunderstorm Watches in Vermont, 2007Severe Thunderstorm Watches in New Hampshire, 2007Severe Thunderstorm Watches in New York, 2007Every severe thunderstorm watch in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.