Alert archive / North Dakota / Tornado Watches in 2006
Tornado Watch 714
The Storm Prediction Center issued this tornado watch at Aug 12, 2006, 2:56 PM CDT for 21 counties in Minnesota; 22 counties in North Dakota; 8 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2006, 2:56 PM CDT (19:56 UTC)
- Expired
- Aug 12, 2006, 7:44 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 51 counties
Becker County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Kittson County, MN, Lac qui Parle County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Pope County, MN, Red Lake County, MN, Roseau County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Benson County, ND, Cass County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, LaMoure County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sheridan County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Walsh County, ND, Wells County, ND, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Marshall County, SD, Roberts County, SD
The radar
The Fargo/Grand Forks radar (KMVX), 37 km from the middle of the area, began a volume at 19:57 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 2:57 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 63 min |
| Aug 12, 3:06 PM CDT | Tornado Warning | FGF | Cavalier, Pembina | 54 min |
| Aug 12, 3:13 PM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 47 min |
| Aug 12, 3:21 PM CDT | Severe Thunderstorm Warning | ABR | Marshall | 24 min |
| Aug 12, 3:26 PM CDT | Severe Thunderstorm Warning | FGF | Richland, Sargent | 64 min |
| Aug 12, 3:30 PM CDT | Tornado Warning | FGF | Ramsey | 30 min |
| Aug 12, 3:57 PM CDT | Tornado Warning | FGF | Nelson | 17 min |
| Aug 12, 4:00 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 60 min |
| Aug 12, 4:15 PM CDT | Severe Thunderstorm Warning | FGF | Nelson | 41 min |
| Aug 12, 4:29 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 34 min |
| Aug 12, 5:33 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 57 min |
| Aug 12, 5:50 PM CDT | Severe Thunderstorm Warning | ABR | Clark, Spink | 25 min |
| Aug 12, 6:36 PM CDT | Flash Flood Warning | ABR | Roberts | 6 hr |
| Aug 12, 7:44 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Lac qui Parle, Stevens, Swift | 50 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, 7.9 hours before the alert went out and 271 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
- 713 J/kg
- Mixed-layer CIN
- -374 J/kg
- Mixed-layer LCL
- 1555 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 327 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 3:13 AM CDT | Mesoscale Discussion | SPC | Clay, Kittson, Marshall, Norman, Polk | 62 min |
| Aug 12, 2:37 PM CDT | Mesoscale Discussion | SPC | Clay, Marshall, Norman, Pennington, Polk, Red Lake and 1 more | 83 min |
| Aug 12, 6:06 PM CDT | Mesoscale Discussion | SPC | Beltrami, Cass, Clearwater, Hubbard, Itasca, Koochiching and 2 more | 84 min |
| Aug 11, 7:58 PM CDT | Mesoscale Discussion | SPC | Adams, Billings, Bottineau, Burke, Burleigh, Divide and 18 more | 92 min |
| Aug 11, 10:38 PM CDT | Mesoscale Discussion | SPC | Barnes, Benson, Cass, Cavalier, Dickey, Eddy and 17 more | 97 min |
| Aug 11, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | Burleigh, Dickey, Emmons, Foster, Kidder, LaMoure and 10 more | 5 hr |
| Aug 12, 1:27 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brule, Buffalo, Edmunds, Faulk and 13 more | 93 min |
| Aug 12, 1:45 PM CDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Brown, Brule, Buffalo, Charles Mix and 23 more | 7 hr |
Nearby
Tornado Watches in North Dakota, 2006Tornado Watches in Minnesota, 2006Tornado Watches in South Dakota, 2006Every tornado watch in 2006
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.