Alert archive / Nebraska / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 281
The Storm Prediction Center issued this severe thunderstorm watch at Jul 18, 2018, 6:14 PM CDT for 58 counties in Nebraska. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2018, 6:14 PM CDT (23:14 UTC)
- Expired
- Jul 19, 2018, 1:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 55 kt
All 58 counties
Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cherry County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dakota County, NE, Dawson County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Franklin County, NE, Garfield County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keya Paha County, NE, Lancaster County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Otoe County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thomas County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE
The radar
The North Platte radar (KLNX), 122 km from the middle of the area, began a volume at 23:14 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
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
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 18, 6:15 PM CDT | Severe Thunderstorm Warning | LBF | Brown, Keya Paha, Rock | 45 min |
| Jul 18, 6:48 PM CDT | Severe Thunderstorm Warning | LBF | Brown, Rock | 46 min |
| Jul 18, 6:55 PM CDT | Severe Thunderstorm Warning | LBF | Garfield, Loup | 50 min |
| Jul 18, 7:06 PM CDT | Severe Thunderstorm Warning | LBF | Boyd, Holt | 39 min |
| Jul 18, 7:12 PM CDT | Tornado Warning | LBF | Loup | 48 min |
| Jul 18, 7:26 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Pierce, Wayne | 49 min |
| Jul 18, 7:42 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 33 min |
| Jul 18, 7:51 PM CDT | Severe Thunderstorm Warning | GID | Sherman, Valley | 39 min |
| Jul 18, 7:54 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Garfield, Loup | 21 min |
| Jul 18, 8:09 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Wayne | 51 min |
| Jul 18, 8:10 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 50 min |
| Jul 18, 8:21 PM CDT | Severe Thunderstorm Warning | GID | Sherman | 39 min |
| Jul 18, 8:42 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Knox | 48 min |
| Jul 18, 8:48 PM CDT | Severe Thunderstorm Warning | GID | Buffalo | 42 min |
| Jul 18, 8:58 PM CDT | Severe Thunderstorm Warning | GID | Sherman | 17 min |
| Jul 18, 9:00 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 45 min |
| Jul 18, 9:22 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Knox | 38 min |
| Jul 18, 9:28 PM CDT | Tornado Warning | GID | Buffalo | 32 min |
| Jul 18, 9:32 PM CDT | Severe Thunderstorm Warning | GID | Sherman, Valley | 43 min |
| Jul 18, 9:43 PM CDT | Severe Thunderstorm Warning | GID | Adams, Kearney | 47 min |
| Jul 18, 10:20 PM CDT | Severe Thunderstorm Warning | GID | Buffalo | 40 min |
| Jul 18, 10:34 PM CDT | Severe Thunderstorm Warning | GID | Franklin, Webster | 41 min |
| Jul 18, 10:39 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Madison, Pierce | 36 min |
| Jul 18, 10:48 PM CDT | Severe Thunderstorm Warning | GID | Adams, Kearney | 42 min |
| Jul 18, 11:05 PM CDT | Severe Thunderstorm Warning | LBF | Holt, Wheeler | 25 min |
| Jul 18, 11:09 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Boone, Pierce | 36 min |
| Jul 18, 11:43 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Boone, Madison, Pierce, Platte | 32 min |
| Jul 19, 12:12 AM CDT | Severe Thunderstorm Warning | OAX | Boone, Madison, Platte | 33 min |
| Jul 19, 12:22 AM CDT | Severe Thunderstorm Warning | OAX | Madison | 21 min |
| Jul 19, 12:33 AM CDT | Severe Thunderstorm Warning | OAX | Platte | 27 min |
| Jul 19, 12:45 AM CDT | Severe Thunderstorm Warning | GID | Nance | 30 min |
| Jul 19, 12:57 AM CDT | Severe Thunderstorm Warning | OAX | Platte | 33 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, 11.2 hours before the alert went out and 163 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
- 86 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1058 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -91 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 11:04 PM CDT | Mesoscale Discussion | SPC | Box Butte, Dawes, Scotts Bluff, Sheridan, Sioux | 86 min |
| Jul 18, 1:57 AM CDT | Mesoscale Discussion | SPC | Arthur, Garden, Grant, Hooker, Keith, McPherson and 2 more | 2 hr |
| Jul 18, 1:39 PM CDT | Mesoscale Discussion | SPC | Boyd, Brown, Holt, Keya Paha, Rock | 2 hr |
| Jul 18, 3:43 PM CDT | Tornado Watch | SPC | Antelope, Boyd, Brown, Cedar, Garfield, Holt and 5 more | 7 hr |
| Jul 18, 4:59 PM CDT | Mesoscale Discussion | SPC | Blaine, Brown, Buffalo, Cherry, Custer, Dawson and 15 more | 91 min |
| Jul 18, 5:16 PM CDT | Mesoscale Discussion | SPC | Antelope, Boyd, Cedar, Dixon, Holt, Keya Paha and 5 more | 119 min |
Nearby
Severe Thunderstorm Watches in Nebraska, 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.