Alert archive / Minnesota / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 581
The Storm Prediction Center issued this severe thunderstorm watch at Aug 10, 2007, 3:04 PM CDT for 11 counties in Minnesota; 8 counties in North Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2007, 3:04 PM CDT (20:04 UTC)
- Expired
- Aug 10, 2007, 10:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Beltrami County, MN, Clearwater County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Barnes County, ND, Cass County, ND, Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Steele County, ND, Traill County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 88 km from the middle of the area, began a volume at 20:06 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
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:14 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 46 min |
| Aug 10, 4:32 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk | 58 min |
| Aug 10, 8:53 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 22 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
International Fa, MN (KINL), launched 12:00Z, 8.1 hours before the alert went out and 258 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
- 234 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 979 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 2:33 PM CDT | Mesoscale Discussion | SPC | Kittson, Marshall, Roseau | 87 min |
| Aug 10, 6:41 PM CDT | Mesoscale Discussion | SPC | Beltrami, Clearwater, Lake of the Woods, Mahnomen | 64 min |
| Aug 10, 2:04 PM CDT | Mesoscale Discussion | SPC | Burleigh, Dickey, Emmons, Grant, Kidder, LaMoure and 5 more | 116 min |
| Aug 10, 3:41 PM CDT | Severe Thunderstorm Watch | SPC | Dickey, Emmons, Foster, Kidder, LaMoure, Logan and 4 more | 8 hr |
| Aug 10, 4:57 PM CDT | Mesoscale Discussion | SPC | Divide, Golden Valley, Williams | 2 hr |
| Aug 10, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 20 more | 9 hr |
Nearby
Severe Thunderstorm Watches in Minnesota, 2007Severe Thunderstorm Watches in North Dakota, 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.