Alert archive / Nebraska / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 439
The Storm Prediction Center issued this severe thunderstorm watch at Jul 18, 2015, 7:41 PM CDT for 9 counties in Kansas; 14 counties in Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2015, 7:41 PM CDT (00:41 UTC)
- Expired
- Jul 19, 2015, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 23 counties
Cheyenne County, KS, Decatur County, KS, Gove County, KS, Logan County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Arthur County, NE, Chase County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE
The radar
The Goodland radar (KGLD), 123 km from the middle of the area, began a volume at 00:45 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
- 2%
- Ten or more severe wind reports
- 30%
- 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
- 60%
Warnings issued inside it
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:59 PM CDT | Severe Thunderstorm Warning | LBF | Arthur, Deuel, Garden, Keith | 46 min |
| Jul 18, 8:28 PM CDT | Severe Thunderstorm Warning | LBF | Keith | 47 min |
| Jul 18, 8:34 PM CDT | Severe Thunderstorm Warning | LBF | Lincoln | 56 min |
| Jul 18, 8:37 PM CDT | Severe Thunderstorm Warning | LBF | Hooker, McPherson | 22 min |
| Jul 18, 8:45 PM CDT | Severe Thunderstorm Warning | LBF | Arthur, Keith | 28 min |
| Jul 18, 9:35 PM CDT | Severe Thunderstorm Warning | GLD | Cheyenne | 55 min |
| Jul 18, 9:35 PM CDT | Severe Thunderstorm Warning | LBF | Keith, Lincoln, Perkins | 40 min |
| Jul 18, 9:45 PM CDT | Severe Thunderstorm Warning | GLD | Sherman, Wallace | 60 min |
| Jul 18, 10:06 PM CDT | Severe Thunderstorm Warning | GLD | Cheyenne | 39 min |
| Jul 18, 10:07 PM CDT | Severe Thunderstorm Warning | LBF | Chase, Hayes, Lincoln, Perkins | 38 min |
| Jul 18, 10:16 PM CDT | Severe Thunderstorm Warning | LBF | Frontier, Hayes, Lincoln | 44 min |
| Jul 18, 10:35 PM CDT | Severe Thunderstorm Warning | GLD | Wallace | 40 min |
| Jul 18, 10:39 PM CDT | Severe Thunderstorm Warning | GLD | Cheyenne, Rawlins | 47 min |
| Jul 18, 11:08 PM CDT | Severe Thunderstorm Warning | GLD | Logan, Wallace | 52 min |
| Jul 18, 11:54 PM CDT | Severe Thunderstorm Warning | GLD | Logan, Sherman, Thomas, Wallace | 51 min |
| Jul 19, 12:33 AM CDT | Severe Thunderstorm Warning | GLD | Thomas | 57 min |
| Jul 19, 12:58 AM CDT | Severe Thunderstorm Warning | GLD | Sheridan | 62 min |
| Jul 19, 1:59 AM CDT | Severe Thunderstorm Warning | GLD | Gove | 61 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, 0.7 hours before the alert went out and 102 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
- 663 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1880 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 8:30 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Dickinson, Doniphan, Douglas and 12 more | 60 min |
| Jul 18, 10:54 PM CDT | Mesoscale Discussion | SPC | Decatur, Gove, Logan, Rawlins, Sheridan, Sherman and 2 more | 96 min |
| Jul 19, 1:03 AM CDT | Mesoscale Discussion | SPC | Decatur, Ellis, Gove, Graham, Lane, Ness and 7 more | 57 min |
| Jul 19, 2:57 AM CDT | Severe Thunderstorm Watch | SPC | Barton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 20 more | 5 hr |
| Jul 19, 5:05 AM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Geary, Jewell, Marshall, Ottawa and 4 more | 85 min |
| Jul 19, 2:18 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Greeley, Hamilton, Kearny, Logan, Rawlins and 6 more | 117 min |
| Jul 19, 3:37 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Clark, Comanche, Edwards, Finney, Ford and 24 more | 8 hr |
| Jul 19, 5:40 PM CDT | Mesoscale Discussion | SPC | Antelope, Blaine, Brown, Cherry, Garfield, Holt and 5 more | 95 min |
| Jul 19, 5:43 PM CDT | Mesoscale Discussion | SPC | Arthur, Chase, Custer, Dawson, Deuel, Frontier and 10 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2015Severe Thunderstorm Watches in Kansas, 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.