Alert archive / North Dakota / Tornado Watches in 2010
Tornado Watch 635
The Storm Prediction Center issued this tornado watch at Aug 30, 2010, 3:53 PM CDT for 18 counties in Minnesota; 26 counties in North Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2010, 3:53 PM CDT (20:53 UTC)
- Expired
- Aug 30, 2010, 10:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 65 kt
All 44 counties
Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Grant County, MN, Hubbard County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Benson County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Walsh County, ND, Wells County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 53 km from the middle of the area, began a volume at 20:52 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
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 4:43 PM CDT | Severe Thunderstorm Warning | BIS | Dickey, LaMoure | 47 min |
| Aug 30, 5:07 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Sargent | 38 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
Aberdeen, SD (KABR), launched 12:00Z, 8.9 hours before the alert went out and 323 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
- 357 J/kg
- Mixed-layer CIN
- -450 J/kg
- Mixed-layer LCL
- 1401 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 199 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 3:23 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Traverse | 6 hr |
| Aug 30, 5:57 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 10 more | 93 min |
| Aug 30, 6:22 PM CDT | Mesoscale Discussion | SPC | Big Stone, Chippewa, Lac qui Parle, Lincoln, Pipestone, Stevens and 3 more | 53 min |
| Aug 30, 6:44 PM CDT | Tornado Watch | SPC | Big Stone, Chippewa, Douglas, Kandiyohi, Lac qui Parle, Lincoln and 11 more | 5 hr |
| Aug 30, 5:02 AM CDT | Mesoscale Discussion | SPC | Burleigh, Eddy, Emmons, Foster, Griggs, Kidder and 4 more | 58 min |
| Aug 30, 1:19 PM CDT | Mesoscale Discussion | SPC | Adams, Benson, Bottineau, Burleigh, Cavalier, Dunn and 27 more | 56 min |
| Aug 30, 3:35 PM CDT | Mesoscale Discussion | SPC | Barnes, Burleigh, Cass, Dickey, Emmons, Foster and 15 more | 55 min |
| Aug 30, 4:49 PM CDT | Mesoscale Discussion | SPC | Billings, Bowman, Golden Valley, Slope | 56 min |
Nearby
Tornado Watches in North Dakota, 2010Tornado Watches in Minnesota, 2010Every tornado watch in 2010
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.