Alert archive / Nebraska / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 449
The Storm Prediction Center issued this severe thunderstorm watch at Aug 12, 2017, 2:59 PM MDT for 4 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2017, 2:59 PM MDT (20:59 UTC)
- Expired
- Aug 12, 2017, 10:25 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 55 counties
Cheyenne County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Rawlins County, KS, Sherman County, KS, Wallace County, KS, Arthur County, NE, Banner County, NE, Blaine County, NE, Box Butte County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawes County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Red Willow County, NE, Rock County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Bennett County, SD, Brule County, SD, Buffalo County, SD, Gregory County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Todd County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 99 km from the middle of the area, began a volume at 21:03 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- 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
- 50%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
44 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 3:05 PM MDT | Severe Thunderstorm Warning | FSD | Aurora, Brule | 40 min |
| Aug 12, 3:12 PM MDT | Severe Thunderstorm Warning | UNR | Tripp | 63 min |
| Aug 12, 3:16 PM MDT | Severe Thunderstorm Warning | LBF | Brown | 44 min |
| Aug 12, 3:18 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Brown | 28 min |
| Aug 12, 3:20 PM MDT | Tornado Warning | CYS | Box Butte, Morrill | 26 min |
| Aug 12, 3:45 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 45 min |
| Aug 12, 3:50 PM MDT | Severe Thunderstorm Warning | CYS | Kimball | 40 min |
| Aug 12, 3:53 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Thomas | 37 min |
| Aug 12, 3:55 PM MDT | Tornado Warning | UNR | Tripp | 50 min |
| Aug 12, 4:10 PM MDT | Severe Thunderstorm Warning | UNR | Tripp | 62 min |
| Aug 12, 4:22 PM MDT | Severe Thunderstorm Warning | LBF | Custer, Logan | 38 min |
| Aug 12, 4:29 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 31 min |
| Aug 12, 4:33 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 42 min |
| Aug 12, 4:51 PM MDT | Severe Thunderstorm Warning | LBF | Keya Paha | 54 min |
| Aug 12, 4:53 PM MDT | Severe Thunderstorm Warning | FSD | Gregory | 37 min |
| Aug 12, 4:54 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 51 min |
| Aug 12, 4:56 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 49 min |
| Aug 12, 5:04 PM MDT | Severe Thunderstorm Warning | LBF | Brown, Rock | 41 min |
| Aug 12, 5:16 PM MDT | Severe Thunderstorm Warning | LBF | Boyd, Keya Paha | 44 min |
| Aug 12, 5:25 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Loup | 50 min |
| Aug 12, 5:30 PM MDT | Tornado Warning | BOU | Washington | 30 min |
| Aug 12, 5:34 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 41 min |
| Aug 12, 5:38 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln, Washington | 52 min |
| Aug 12, 5:40 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 50 min |
| Aug 12, 5:45 PM MDT | Severe Thunderstorm Warning | LBF | Brown, Rock | 30 min |
| Aug 12, 6:00 PM MDT | Severe Thunderstorm Warning | LBF | Brown | 45 min |
| Aug 12, 6:05 PM MDT | Tornado Warning | LBF | Custer | 25 min |
| Aug 12, 6:14 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 29 min |
| Aug 12, 6:14 PM MDT | Severe Thunderstorm Warning | LBF | Loup, Rock | 31 min |
| Aug 12, 6:16 PM MDT | Tornado Warning | GLD | Yuma | 29 min |
| Aug 12, 6:25 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 50 min |
| Aug 12, 6:40 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Brown | 50 min |
| Aug 12, 6:44 PM MDT | Tornado Warning | LBF | Perkins | 17 min |
| Aug 12, 7:06 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 39 min |
| Aug 12, 7:08 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 52 min |
| Aug 12, 7:21 PM MDT | Severe Thunderstorm Warning | GLD | Dundy, Hitchcock | 24 min |
| Aug 12, 7:23 PM MDT | Flash Flood Warning | LBF | Hayes | 6 hr |
| Aug 12, 7:34 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 25 min |
| Aug 12, 7:41 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 49 min |
| Aug 12, 7:42 PM MDT | Severe Thunderstorm Warning | GLD | Rawlins | 48 min |
| Aug 12, 8:08 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 39 min |
| Aug 12, 8:11 PM MDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson | 49 min |
| Aug 12, 8:19 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Custer, Loup | 41 min |
| Aug 12, 8:24 PM MDT | Flash Flood Warning | LBF | Custer | 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 |
|---|---|---|---|---|
| Aug 12, 5:16 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Kit Carson, Logan, Phillips, Sedgwick, Washington and 1 more | 89 min |
| Aug 12, 1:36 PM MDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Brown, Cherry, Cheyenne, Dawes and 9 more | 114 min |
| Aug 12, 4:46 PM MDT | Mesoscale Discussion | SPC | Campbell, Corson, Dewey, Edmunds, Harding, Perkins and 4 more | 89 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2017Severe Thunderstorm Watches in South Dakota, 2017Severe Thunderstorm Watches in Colorado, 2017Every severe thunderstorm watch in 2017
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.