Alert archive / Nebraska / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 447
The Storm Prediction Center issued this severe thunderstorm watch at Jul 23, 2015, 2:04 PM MDT for 4 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 23, 2015, 2:04 PM MDT (20:04 UTC)
- Expired
- Jul 23, 2015, 10:00 PM MDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 54 counties
Cheyenne County, CO, Kit Carson County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Graham County, KS, Greeley County, KS, Norton County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Cherry 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, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE, Charles Mix County, SD, Douglas County, SD, Gregory County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 15 km from the middle of the area, began a volume at 20:03 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 2:16 PM MDT | Severe Thunderstorm Warning | LBF | Keith | 37 min |
| Jul 23, 3:49 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 56 min |
| Jul 23, 3:51 PM MDT | Tornado Warning | LBF | Thomas | 24 min |
| Jul 23, 4:11 PM MDT | Severe Thunderstorm Warning | LBF | Deuel, Keith, Perkins | 49 min |
| Jul 23, 4:16 PM MDT | Flash Flood Warning | GLD | Kit Carson | 3 hr |
| Jul 23, 4:19 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 56 min |
| Jul 23, 4:51 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 28 min |
| Jul 23, 5:26 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 16 min |
| Jul 23, 5:54 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Hayes, Perkins | 36 min |
| Jul 23, 6:04 PM MDT | Severe Thunderstorm Warning | GLD | Greeley | 28 min |
| Jul 23, 6:41 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 49 min |
| Jul 23, 6:58 PM MDT | Severe Thunderstorm Warning | GLD | Wichita | 62 min |
| Jul 23, 7:10 PM MDT | Severe Thunderstorm Warning | GID | Dawson, Gosper | 50 min |
| Jul 23, 7:18 PM MDT | Severe Thunderstorm Warning | GLD | Red Willow | 57 min |
| Jul 23, 7:29 PM MDT | Severe Thunderstorm Warning | LBF | Frontier | 31 min |
| Jul 23, 8:13 PM MDT | Severe Thunderstorm Warning | GLD | Red Willow | 62 min |
| Jul 23, 8:36 PM MDT | Severe Thunderstorm Warning | GLD | Red Willow | 54 min |
| Jul 23, 8:54 PM MDT | Severe Thunderstorm Warning | GLD | Red Willow | 36 min |
| Jul 23, 9:23 PM MDT | Severe Thunderstorm Warning | GLD | Red Willow | 44 min |
| Jul 23, 9:38 PM MDT | Severe Thunderstorm Warning | GLD | Decatur | 67 min |
| Jul 23, 9:49 PM MDT | Severe Thunderstorm Warning | GLD | Decatur, Norton | 56 min |
| Jul 23, 9:57 PM MDT | Severe Thunderstorm Warning | GID | Franklin, Harlan | 48 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, 8.1 hours before the alert went out and 81 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
- 631 J/kg
- Mixed-layer CIN
- -267 J/kg
- Mixed-layer LCL
- 1320 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 1:34 PM MDT | Mesoscale Discussion | SPC | Logan, Phillips, Sedgwick, Yuma | 56 min |
| Jul 22, 6:34 PM MDT | Mesoscale Discussion | SPC | Rawlins, Sheridan, Thomas | 26 min |
| Jul 23, 5:55 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Logan, Rawlins, Sheridan, Sherman and 2 more | 2 hr |
| Jul 23, 12:34 PM MDT | Mesoscale Discussion | SPC | Corson | 116 min |
| Jul 23, 5:21 PM MDT | Mesoscale Discussion | SPC | Campbell, Corson | 24 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 2015Severe Thunderstorm Watches in Kansas, 2015Severe Thunderstorm Watches in South Dakota, 2015Every severe thunderstorm watch in 2015
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.