Alert archive / Nebraska / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 225
The Storm Prediction Center issued this severe thunderstorm watch at May 16, 2017, 6:03 PM MDT for Yuma County, Colorado; Cheyenne County, Decatur County, Rawlins County, Kansas; 29 counties in Nebraska. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 16, 2017, 6:03 PM MDT (00:03 UTC)
- Expired
- May 16, 2017, 11:00 PM MDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 33 counties
Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Rawlins County, KS, Arthur County, NE, Blaine County, NE, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Greeley County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Howard County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE
The radar
The North Platte radar (KLNX), 104 km from the middle of the area, began a volume at 00:02 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
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 6:03 PM MDT | Severe Thunderstorm Warning | GID | Buffalo, Kearney, Phelps | 42 min |
| May 16, 6:05 PM MDT | Severe Thunderstorm Warning | GLD | Rawlins | 40 min |
| May 16, 6:28 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson, Yuma | 28 min |
| May 16, 6:32 PM MDT | Severe Thunderstorm Warning | GID | Hall, Hamilton, Howard, Merrick | 29 min |
| May 16, 6:42 PM MDT | Severe Thunderstorm Warning | GLD | Rawlins | 48 min |
| May 16, 6:45 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln, Perkins | 45 min |
| May 16, 7:27 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 33 min |
| May 16, 7:53 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Rawlins | 28 min |
| May 16, 8:54 PM MDT | Severe Thunderstorm Warning | GLD | Rawlins, Thomas | 36 min |
| May 16, 9:04 PM MDT | Flash Flood Warning | GLD | Decatur, Rawlins | 3 hr |
| May 16, 10:22 PM MDT | Severe Thunderstorm Warning | GID | Furnas, Gosper, Harlan, Phelps | 38 min |
| May 16, 10:58 PM MDT | Severe Thunderstorm Warning | GID | Franklin, Harlan, Kearney, Phelps | 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 00:00Z, 0.1 hours before the alert went out and 17 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
- 256 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 2322 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 8:43 PM MDT | Mesoscale Discussion | SPC | Phillips, Yuma | 62 min |
| May 16, 6:31 PM MDT | Mesoscale Discussion | SPC | Brown, Clay, Cloud, Dickinson, Ellis, Ellsworth and 24 more | 59 min |
| May 16, 8:53 PM MDT | Mesoscale Discussion | SPC | Cowley, Harper, Sumner | 37 min |
| May 16, 9:07 PM MDT | Severe Thunderstorm Watch | SPC | Barber, Cowley, Harper, Sumner | 6 hr |
| May 16, 9:45 PM MDT | Severe Thunderstorm Watch | SPC | Barton, Butler, Chase, Comanche, Dickinson, Edwards and 17 more | 5 hr |
| May 17, 12:49 AM MDT | Mesoscale Discussion | SPC | Butler, Chase, Chautauqua, Cowley, Elk, Geary and 4 more | 56 min |
| May 17, 10:39 AM MDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Nemaha | 66 min |
| May 17, 11:08 AM MDT | Tornado Watch | SPC | Atchison, Brown, Cloud, Doniphan, Douglas, Jackson and 10 more | 7 hr |
| May 17, 1:25 PM MDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Geary, Jackson, Jefferson and 7 more | 65 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2017Severe Thunderstorm Watches in Kansas, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.