Alert archive / Nebraska / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 320
The Storm Prediction Center issued this severe thunderstorm watch at Jul 28, 2018, 5:40 PM MDT for 6 counties in Colorado; 13 counties in Kansas; 15 counties in Nebraska. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2018, 5:40 PM MDT (23:40 UTC)
- Expired
- Jul 29, 2018, 1:00 AM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 34 counties
Cheyenne County, CO, Kit Carson County, CO, Logan County, CO, Phillips County, CO, Sedgwick 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, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Chase County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Lincoln County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE, Sheridan County, NE
The radar
The North Platte radar (KLNX), 129 km from the middle of the area, began a volume at 23:44 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
- 70%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
32 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 5:43 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Weld | 47 min |
| Jul 28, 6:18 PM MDT | Severe Thunderstorm Warning | LBF | Garden, Sheridan | 42 min |
| Jul 28, 6:27 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 39 min |
| Jul 28, 6:28 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 47 min |
| Jul 28, 6:44 PM MDT | Severe Thunderstorm Warning | LBF | Garden | 46 min |
| Jul 28, 6:49 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 41 min |
| Jul 28, 6:54 PM MDT | Tornado Warning | BOU | Logan | 22 min |
| Jul 28, 7:00 PM MDT | Flash Flood Warning | GLD | Yuma | 3 hr |
| Jul 28, 7:12 PM MDT | Severe Thunderstorm Warning | LBF | Garden, Keith | 48 min |
| Jul 28, 7:13 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 32 min |
| Jul 28, 7:21 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 54 min |
| Jul 28, 7:26 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 55 min |
| Jul 28, 7:39 PM MDT | Severe Thunderstorm Warning | LBF | Deuel, Garden, Keith | 51 min |
| Jul 28, 7:50 PM MDT | Severe Thunderstorm Warning | BOU | Phillips, Sedgwick | 40 min |
| Jul 28, 7:58 PM MDT | Flash Flood Warning | GLD | Yuma | 103 min |
| Jul 28, 7:59 PM MDT | Severe Thunderstorm Warning | LBF | Perkins | 46 min |
| Jul 28, 8:00 PM MDT | Flash Flood Warning | GLD | Cheyenne | 101 min |
| Jul 28, 8:14 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Rawlins, Sherman, Thomas | 46 min |
| Jul 28, 8:23 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 52 min |
| Jul 28, 8:31 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Perkins | 44 min |
| Jul 28, 9:09 PM MDT | Severe Thunderstorm Warning | LBF | Chase | 31 min |
| Jul 28, 9:11 PM MDT | Severe Thunderstorm Warning | GLD | Decatur, Rawlins | 64 min |
| Jul 28, 9:15 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 15 min |
| Jul 28, 9:38 PM MDT | Severe Thunderstorm Warning | GLD | Hitchcock | 47 min |
| Jul 28, 9:48 PM MDT | Flash Flood Warning | GLD | Decatur, Norton | 95 min |
| Jul 28, 9:54 PM MDT | Tornado Warning | GLD | Rawlins | 12 min |
| Jul 28, 10:12 PM MDT | Severe Thunderstorm Warning | GLD | Decatur, Norton | 50 min |
| Jul 28, 11:15 PM MDT | Flash Flood Warning | GLD | Graham | 50 min |
| Jul 28, 11:43 PM MDT | Severe Thunderstorm Warning | GLD | Sheridan, Thomas | 32 min |
| Jul 28, 11:51 PM MDT | Severe Thunderstorm Warning | GLD | Gove, Sheridan, Thomas | 39 min |
| Jul 29, 12:26 AM MDT | Severe Thunderstorm Warning | GLD | Gove | 34 min |
| Jul 29, 12:30 AM MDT | Flash Flood Warning | GLD | Hitchcock | 4 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 11.7 hours before the alert went out and 193 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
- 281 J/kg
- Mixed-layer CIN
- -374 J/kg
- Mixed-layer LCL
- 928 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 84 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 28, 3:10 PM MDT | Mesoscale Discussion | SPC | Bent, Cheyenne, Crowley, El Paso, Kiowa, Lincoln and 2 more | 65 min |
| Jul 28, 5:01 PM MDT | Mesoscale Discussion | SPC | Logan, Phillips, Sedgwick, Yuma | 119 min |
| Jul 27, 7:24 PM MDT | Mesoscale Discussion | SPC | Clark, Finney, Ford, Grant, Gray, Hamilton and 11 more | 2 hr |
| Jul 28, 2:41 PM MDT | Mesoscale Discussion | SPC | Cherokee, Labette, Neosho | 64 min |
| Jul 28, 2:17 PM MDT | Mesoscale Discussion | SPC | Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more | 88 min |
| Jul 28, 2:34 PM MDT | Tornado Watch | SPC | Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2018Severe Thunderstorm Watches in Kansas, 2018Severe Thunderstorm Watches in Colorado, 2018Every severe thunderstorm watch in 2018
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.