Alert archive / South Dakota / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 273
The Storm Prediction Center issued this severe thunderstorm watch at Jul 12, 2018, 2:24 PM MDT for 15 counties in Nebraska; 23 counties in South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 12, 2018, 2:24 PM MDT (20:24 UTC)
- Expired
- Jul 12, 2018, 9:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 38 counties
Arthur County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Cedar County, NE, Cherry County, NE, Grant County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Knox County, NE, Logan County, NE, McPherson County, NE, Rock County, NE, Thomas County, NE, Aurora County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory 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, Sanborn County, SD, Todd County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The North Platte radar (KLNX), 116 km from the middle of the area, began a volume at 20:27 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- 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
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 3:03 PM MDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury, Lake, Miner | 42 min |
| Jul 12, 3:27 PM MDT | Severe Thunderstorm Warning | LBF | Cherry, Sheridan | 48 min |
| Jul 12, 3:32 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 43 min |
| Jul 12, 3:38 PM MDT | Severe Thunderstorm Warning | FSD | Brookings, Lake, Moody | 52 min |
| Jul 12, 4:05 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 40 min |
| Jul 12, 4:08 PM MDT | Severe Thunderstorm Warning | FSD | Lake, Minnehaha, Moody | 52 min |
| Jul 12, 4:21 PM MDT | Severe Thunderstorm Warning | LBF | Keya Paha | 39 min |
| Jul 12, 5:31 PM MDT | Flash Flood Warning | FSD | Gregory | 2 hr |
| Jul 12, 6:23 PM MDT | Flash Flood Warning | FSD | Aurora, Charles Mix, Davison, Douglas, Gregory, Hanson and 2 more | 3 hr |
| Jul 12, 8:07 PM MDT | Flash Flood Warning | FSD | Gregory | 3 hr |
| Jul 12, 8:46 PM MDT | Flash Flood Warning | FSD | Aurora, Charles Mix, Davison, Douglas, Gregory, Hanson and 2 more | 6 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 1:47 PM MDT | Mesoscale Discussion | SPC | Antelope, Arthur, Blaine, Box Butte, Boyd, Brown and 27 more | 2 hr |
| Jul 12, 5:36 PM MDT | Mesoscale Discussion | SPC | Antelope, Arthur, Blaine, Boyd, Brown, Cedar and 12 more | 84 min |
| Jul 12, 3:47 PM MDT | Mesoscale Discussion | SPC | Moody | 88 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2018Severe Thunderstorm Watches in Nebraska, 2018Every severe thunderstorm watch in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.