Alert archive / North Dakota / Tornado Watches in 2013
Tornado Watch 546
The Storm Prediction Center issued this tornado watch at Oct 11, 2013, 12:16 PM CDT for 16 counties in Minnesota; 17 counties in North Dakota; 15 counties in South Dakota. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 11, 2013, 12:16 PM CDT (17:16 UTC)
- Expired
- Oct 11, 2013, 8:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 48 counties
Becker County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Lac qui Parle County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Yellow Medicine County, MN, Barnes County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Foster County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Brown County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 115 km from the middle of the area, began a volume at 17:18 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 5:02 PM CDT | Tornado Warning | ABR | Traverse | 13 min |
| Oct 11, 5:33 PM CDT | Tornado Warning | ABR | Traverse | 27 min |
| Oct 11, 5:35 PM CDT | Tornado Warning | FGF | Griggs, Nelson, Steele | 25 min |
| Oct 11, 6:04 PM CDT | Tornado Warning | FGF | Clay, Norman, Polk | 41 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, 5.3 hours before the alert went out and 176 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
- 106 J/kg
- Mixed-layer CIN
- -372 J/kg
- Mixed-layer LCL
- 1205 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 34 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 |
|---|---|---|---|---|
| Oct 11, 2:49 PM CDT | Mesoscale Discussion | SPC | Big Stone, Clay, Grant, Norman, Polk, Traverse and 1 more | 86 min |
| Oct 11, 5:48 PM CDT | Mesoscale Discussion | SPC | Chippewa, Clay, Douglas, Grant, Norman, Otter Tail and 4 more | 87 min |
| Oct 11, 11:24 AM CDT | Mesoscale Discussion | SPC | Dickey, Emmons, Kidder, LaMoure, Logan, McIntosh and 3 more | 96 min |
Nearby
Tornado Watches in North Dakota, 2013Tornado Watches in Minnesota, 2013Tornado Watches in South Dakota, 2013Every tornado watch in 2013
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.