Alert archive / South Dakota / Tornado Watches in 2014
Tornado Watch 315
The Storm Prediction Center issued this tornado watch at Jun 17, 2014, 6:48 PM CDT for 12 counties in Iowa; 8 counties in Nebraska; 13 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 17, 2014, 6:48 PM CDT (23:48 UTC)
- Expired
- Jun 18, 2014, 1:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 33 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Antelope County, NE, Cedar County, NE, Dakota County, NE, Dixon County, NE, Knox County, NE, Pierce County, NE, Thurston County, NE, Wayne County, NE, Bon Homme County, SD, Clay County, SD, Hanson County, SD, Hutchinson County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 87 km from the middle of the area, began a volume at 23:51 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
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
35 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 7:38 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 37 min |
| Jun 17, 8:00 PM CDT | Tornado Warning | OAX | Cedar | 30 min |
| Jun 17, 8:13 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 32 min |
| Jun 17, 8:20 PM CDT | Tornado Warning | OAX | Cedar | 40 min |
| Jun 17, 8:38 PM CDT | Tornado Warning | FSD | Dixon | 52 min |
| Jun 17, 8:40 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 35 min |
| Jun 17, 8:55 PM CDT | Tornado Warning | OAX | Cedar | 35 min |
| Jun 17, 9:01 PM CDT | Flash Flood Warning | OAX | Cedar | 3 hr |
| Jun 17, 9:08 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 37 min |
| Jun 17, 9:24 PM CDT | Tornado Warning | FSD | Dixon | 51 min |
| Jun 17, 9:26 PM CDT | Tornado Warning | OAX | Cedar | 34 min |
| Jun 17, 9:40 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 35 min |
| Jun 17, 9:41 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 49 min |
| Jun 17, 9:44 PM CDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha | 46 min |
| Jun 17, 9:53 PM CDT | Tornado Warning | OAX | Cedar | 37 min |
| Jun 17, 9:53 PM CDT | Severe Thunderstorm Warning | FSD | McCook | 52 min |
| Jun 17, 10:09 PM CDT | Tornado Warning | FSD | Dixon | 36 min |
| Jun 17, 10:24 PM CDT | Tornado Warning | OAX | Cedar | 36 min |
| Jun 17, 10:28 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 47 min |
| Jun 17, 10:30 PM CDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha | 45 min |
| Jun 17, 10:33 PM CDT | Tornado Warning | FSD | Minnehaha | 27 min |
| Jun 17, 10:41 PM CDT | Severe Thunderstorm Warning | FSD | McCook, Miner | 49 min |
| Jun 17, 10:47 PM CDT | Tornado Warning | FSD | Dixon | 43 min |
| Jun 17, 10:47 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, McCook | 43 min |
| Jun 17, 10:58 PM CDT | Tornado Warning | FSD | Minnehaha | 32 min |
| Jun 17, 11:03 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 42 min |
| Jun 17, 11:07 PM CDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha | 38 min |
| Jun 17, 11:08 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 52 min |
| Jun 17, 11:22 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, McCook | 53 min |
| Jun 17, 11:24 PM CDT | Severe Thunderstorm Warning | FSD | Dakota, Dixon | 51 min |
| Jun 17, 11:29 PM CDT | Flash Flood Warning | FSD | Woodbury | 9 hr |
| Jun 17, 11:30 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Miner, Sanborn | 45 min |
| Jun 18, 12:03 AM CDT | Severe Thunderstorm Warning | FSD | Hanson, McCook, Turner | 42 min |
| Jun 18, 12:22 AM CDT | Severe Thunderstorm Warning | FSD | O'Brien, Osceola | 23 min |
| Jun 18, 12:39 AM CDT | Severe Thunderstorm Warning | FSD | Hanson, McCook | 51 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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.8 hours before the alert went out and 351 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
- 2516 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 938 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 13 more | 8 hr |
| Jun 16, 9:11 PM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Calhoun, Carroll, Cherokee, Crawford and 15 more | 64 min |
| Jun 16, 9:56 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Appanoose, Audubon, Boone, Buena Vista, Calhoun and 34 more | 5 hr |
| Jun 16, 11:11 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 23 more | 64 min |
| Jun 16, 11:40 PM CDT | Mesoscale Discussion | SPC | Cedar, Clinton, Iowa, Jackson, Johnson, Jones and 5 more | 65 min |
| Jun 17, 1:29 AM CDT | Mesoscale Discussion | SPC | Appanoose, Cedar, Clarke, Davis, Decatur, Des Moines and 23 more | 91 min |
| Jun 17, 3:41 AM CDT | Mesoscale Discussion | SPC | Clinton, Jackson, Scott | 64 min |
| Jun 17, 5:12 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Lyon, O'Brien, Osceola and 2 more | 2 hr |
| Jun 17, 3:22 PM CDT | Mesoscale Discussion | SPC | Banner, Box Butte, Dawes, Garden, Kimball, Morrill and 3 more | 113 min |
| Jun 17, 4:53 PM CDT | Tornado Watch | SPC | Blaine, Brown, Cherry, Grant, Hooker, Keya Paha and 3 more | 6 hr |
| Jun 16, 7:47 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Charles Mix, Davison, Douglas, Gregory, Hanson and 8 more | 58 min |
| Jun 16, 7:49 PM CDT | Mesoscale Discussion | SPC | Perkins | 86 min |
| Jun 16, 8:37 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Charles Mix, Davison, Douglas, Gregory, Hanson and 8 more | 83 min |
| Jun 17, 12:40 PM CDT | Mesoscale Discussion | SPC | Butte, Custer, Fall River, Harding, Lawrence, Pennington | 2 hr |
| Jun 17, 1:31 PM CDT | Tornado Watch | SPC | Bennett, Butte, Custer, Harding, Jackson, Lawrence and 3 more | 7 hr |
| Jun 17, 6:02 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Harding, Jackson, Meade, Oglala Lakota and 1 more | 88 min |
Nearby
Tornado Watches in South Dakota, 2014Tornado Watches in Iowa, 2014Tornado Watches in Nebraska, 2014Every tornado watch in 2014
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.