Alert archive / Nebraska / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 451
The Storm Prediction Center issued this severe thunderstorm watch at Aug 13, 2017, 3:00 PM MDT for 4 states. It was in force for 11 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2017, 3:00 PM MDT (21:00 UTC)
- Expired
- Aug 14, 2017, 2:00 AM MDT
- In force
- 11 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 73 counties
Cheyenne County, CO, Kit Carson County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Greeley County, KS, Logan County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Cedar County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dixon County, NE, Dundy County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Keya Paha County, NE, Knox County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Pierce County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE, Bon Homme County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The North Platte radar (KLNX), 81 km from the middle of the area, began a volume at 21:01 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
- 10%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
55 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 3:20 PM MDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Douglas, Hutchinson | 25 min |
| Aug 13, 3:24 PM MDT | Severe Thunderstorm Warning | FSD | Hanson, Hutchinson, McCook, Turner | 36 min |
| Aug 13, 3:33 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Custer | 42 min |
| Aug 13, 3:39 PM MDT | Tornado Warning | FSD | Bon Homme, Charles Mix | 36 min |
| Aug 13, 3:56 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 49 min |
| Aug 13, 3:58 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Loup | 47 min |
| Aug 13, 4:02 PM MDT | Flash Flood Warning | LBF | Custer | 6 hr |
| Aug 13, 4:15 PM MDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 30 min |
| Aug 13, 4:40 PM MDT | Tornado Warning | FSD | Bon Homme, Charles Mix | 35 min |
| Aug 13, 4:42 PM MDT | Severe Thunderstorm Warning | FSD | Minnehaha | 33 min |
| Aug 13, 4:43 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 47 min |
| Aug 13, 4:52 PM MDT | Severe Thunderstorm Warning | FSD | Minnehaha, Moody | 23 min |
| Aug 13, 5:23 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 52 min |
| Aug 13, 5:30 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 45 min |
| Aug 13, 5:32 PM MDT | Flash Flood Warning | LBF | Custer | 8 hr |
| Aug 13, 5:34 PM MDT | Severe Thunderstorm Warning | OAX | Knox | 41 min |
| Aug 13, 5:36 PM MDT | Severe Thunderstorm Warning | GLD | Greeley | 39 min |
| Aug 13, 5:39 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 51 min |
| Aug 13, 5:39 PM MDT | Severe Thunderstorm Warning | FSD | Bon Homme | 21 min |
| Aug 13, 5:44 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Loup | 46 min |
| Aug 13, 5:44 PM MDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha | 31 min |
| Aug 13, 5:58 PM MDT | Tornado Warning | FSD | McCook | 17 min |
| Aug 13, 6:05 PM MDT | Tornado Warning | LBF | Custer | 40 min |
| Aug 13, 6:08 PM MDT | Severe Thunderstorm Warning | OAX | Knox | 52 min |
| Aug 13, 6:14 PM MDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha, Turner | 31 min |
| Aug 13, 6:16 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 44 min |
| Aug 13, 6:25 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 50 min |
| Aug 13, 6:41 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 49 min |
| Aug 13, 6:43 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson, Yuma | 47 min |
| Aug 13, 6:48 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 42 min |
| Aug 13, 7:00 PM MDT | Severe Thunderstorm Warning | LBF | Custer, Lincoln, Logan | 45 min |
| Aug 13, 7:21 PM MDT | Severe Thunderstorm Warning | OAX | Knox, Pierce | 39 min |
| Aug 13, 7:28 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 47 min |
| Aug 13, 7:28 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 47 min |
| Aug 13, 7:37 PM MDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson | 38 min |
| Aug 13, 8:11 PM MDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson | 49 min |
| Aug 13, 8:15 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 33 min |
| Aug 13, 8:34 PM MDT | Severe Thunderstorm Warning | GID | Dawson | 41 min |
| Aug 13, 8:59 PM MDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson | 46 min |
| Aug 13, 9:01 PM MDT | Severe Thunderstorm Warning | GID | Dawson | 44 min |
| Aug 13, 9:24 PM MDT | Severe Thunderstorm Warning | GID | Dawson, Gosper | 51 min |
| Aug 13, 9:48 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 27 min |
| Aug 13, 9:59 PM MDT | Severe Thunderstorm Warning | GID | Gosper | 46 min |
| Aug 13, 10:32 PM MDT | Severe Thunderstorm Warning | GID | Furnas, Gosper, Harlan, Phelps | 43 min |
| Aug 13, 10:40 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 50 min |
| Aug 13, 11:09 PM MDT | Severe Thunderstorm Warning | GID | Furnas, Gosper, Harlan | 51 min |
| Aug 13, 11:30 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 45 min |
| Aug 13, 11:41 PM MDT | Severe Thunderstorm Warning | GLD | Red Willow | 34 min |
| Aug 13, 11:49 PM MDT | Severe Thunderstorm Warning | GID | Furnas, Gosper | 41 min |
| Aug 14, 12:22 AM MDT | Severe Thunderstorm Warning | GID | Furnas | 38 min |
| Aug 14, 12:29 AM MDT | Flash Flood Warning | GID | Furnas, Gosper | 6 hr |
| Aug 14, 12:37 AM MDT | Severe Thunderstorm Warning | GID | Dawson | 38 min |
| Aug 14, 12:44 AM MDT | Flash Flood Warning | LBF | Frontier | 6 hr |
| Aug 14, 12:52 AM MDT | Flash Flood Warning | LBF | Custer | 5 hr |
| Aug 14, 1:13 AM MDT | Severe Thunderstorm Warning | GID | Dawson | 47 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, 9.0 hours before the alert went out and 91 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
- 439 J/kg
- Mixed-layer CIN
- -191 J/kg
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 1:50 PM MDT | Mesoscale Discussion | SPC | Baca | 85 min |
| Aug 13, 2:41 PM MDT | Severe Thunderstorm Watch | SPC | Baca, Bent, Crowley, Kiowa, Las Animas, Otero and 1 more | 8 hr |
| Aug 12, 7:41 PM MDT | Mesoscale Discussion | SPC | Buffalo, Custer, Dawson, Frontier, Furnas, Gosper and 4 more | 94 min |
| Aug 13, 2:18 PM MDT | Mesoscale Discussion | SPC | Blaine, Boyd, Brown, Buffalo, Custer, Dawson and 22 more | 117 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2017Severe Thunderstorm Watches in Kansas, 2017Severe Thunderstorm Watches in South Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.