Alert archive / Maine / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 651
The Storm Prediction Center issued this severe thunderstorm watch at Aug 25, 2007, 3:16 PM EDT for 16 counties in Maine; 8 counties in New Hampshire. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2007, 3:16 PM EDT (19:16 UTC)
- Expired
- Aug 25, 2007, 11:00 PM EDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 24 counties
Androscoggin County, ME, Aroostook County, ME, Cumberland County, ME, Franklin County, ME, Hancock County, ME, Kennebec County, ME, Knox County, ME, Lincoln County, ME, Oxford County, ME, Penobscot County, ME, Piscataquis County, ME, Sagadahoc County, ME, Somerset County, ME, Waldo County, ME, Washington County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH
The radar
The Portland,ME radar (KGYX), 145 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.
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
- 10%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 3:29 PM EDT | Severe Thunderstorm Warning | CAR | Piscataquis | 46 min |
| Aug 25, 5:19 PM EDT | Severe Thunderstorm Warning | CAR | Penobscot | 41 min |
| Aug 25, 5:38 PM EDT | Severe Thunderstorm Warning | GYX | Grafton, Sullivan | 52 min |
| Aug 25, 5:38 PM EDT | Severe Thunderstorm Warning | GYX | Coos | 67 min |
| Aug 25, 5:52 PM EDT | Severe Thunderstorm Warning | CAR | Piscataquis, Somerset | 38 min |
| Aug 25, 6:12 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll, Grafton, Merrimack | 48 min |
| Aug 25, 6:22 PM EDT | Severe Thunderstorm Warning | GYX | Sullivan | 38 min |
| Aug 25, 6:37 PM EDT | Severe Thunderstorm Warning | GYX | Oxford | 53 min |
| Aug 25, 6:45 PM EDT | Severe Thunderstorm Warning | GYX | Merrimack | 60 min |
| Aug 25, 6:45 PM EDT | Severe Thunderstorm Warning | GYX | Coos | 45 min |
| Aug 25, 6:51 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Carroll | 39 min |
| Aug 25, 6:56 PM EDT | Severe Thunderstorm Warning | GYX | Cumberland, Oxford, York | 49 min |
| Aug 25, 7:04 PM EDT | Severe Thunderstorm Warning | CAR | Penobscot | 26 min |
| Aug 25, 7:25 PM EDT | Severe Thunderstorm Warning | GYX | Androscoggin, Cumberland, Sagadahoc | 50 min |
| Aug 25, 7:35 PM EDT | Severe Thunderstorm Warning | GYX | Belknap, Strafford | 40 min |
| Aug 25, 7:40 PM EDT | Severe Thunderstorm Warning | CAR | Piscataquis | 50 min |
| Aug 25, 7:45 PM EDT | Severe Thunderstorm Warning | GYX | Franklin, Somerset | 45 min |
| Aug 25, 8:03 PM EDT | Severe Thunderstorm Warning | GYX | Kennebec | 42 min |
| Aug 25, 8:44 PM EDT | Severe Thunderstorm Warning | GYX | Sullivan | 31 min |
| Aug 25, 9:57 PM EDT | Severe Thunderstorm Warning | GYX | Carroll | 33 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Caribou, ME (KCAR), launched 12:00Z, 7.3 hours before the alert went out and 244 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
- 647 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 2:36 PM EDT | Mesoscale Discussion | SPC | Androscoggin, Franklin, Kennebec, Oxford, Penobscot, Piscataquis and 1 more | 84 min |
| Aug 25, 4:26 PM EDT | Mesoscale Discussion | SPC | Androscoggin, Cumberland, Franklin, Kennebec, Oxford, Penobscot and 3 more | 94 min |
| Aug 25, 6:48 PM EDT | Mesoscale Discussion | SPC | Androscoggin, Aroostook, Cumberland, Franklin, Hancock, Kennebec and 10 more | 87 min |
| Aug 25, 1:58 PM EDT | Severe Thunderstorm Watch | SPC | Addison, Bennington, Caledonia, Chittenden, Essex, Franklin and 8 more | 8 hr |
| Aug 25, 7:24 PM EDT | Mesoscale Discussion | SPC | Chittenden | 96 min |
Nearby
Severe Thunderstorm Watches in Maine, 2007Severe Thunderstorm Watches in New Hampshire, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.