Alert archive / Nebraska / Tornado Watches in 2013
Tornado Watch 454
The Storm Prediction Center issued this tornado watch at Aug 1, 2013, 1:22 PM CDT for 32 counties in Nebraska; 6 counties in South Dakota. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 1, 2013, 1:22 PM CDT (18:22 UTC)
- Expired
- Aug 1, 2013, 10:00 PM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 38 counties
Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Cherry County, NE, Custer County, NE, Dawson County, NE, Garfield County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Polk County, NE, Rock County, NE, Sheridan County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE, York County, NE, Bennett County, SD, Gregory County, SD, Jackson County, SD, Mellette County, SD, Todd County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 61 km from the middle of the area, began a volume at 18:22 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
55 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 1:37 PM CDT | Severe Thunderstorm Warning | UNR | Todd | 53 min |
| Aug 1, 1:42 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 48 min |
| Aug 1, 1:52 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 38 min |
| Aug 1, 1:54 PM CDT | Severe Thunderstorm Warning | LBF | Holt, Rock | 51 min |
| Aug 1, 2:00 PM CDT | Severe Thunderstorm Warning | LBF | Boyd, Holt | 45 min |
| Aug 1, 2:03 PM CDT | Severe Thunderstorm Warning | UNR | Bennett, Todd | 27 min |
| Aug 1, 2:18 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 42 min |
| Aug 1, 2:26 PM CDT | Tornado Warning | LBF | Cherry | 34 min |
| Aug 1, 2:30 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 45 min |
| Aug 1, 2:44 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 46 min |
| Aug 1, 3:03 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 42 min |
| Aug 1, 3:21 PM CDT | Severe Thunderstorm Warning | LBF | Brown | 39 min |
| Aug 1, 3:43 PM CDT | Severe Thunderstorm Warning | LBF | Holt, Wheeler | 47 min |
| Aug 1, 3:47 PM CDT | Severe Thunderstorm Warning | LBF | Brown, Rock | 43 min |
| Aug 1, 4:17 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Boone | 43 min |
| Aug 1, 4:25 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 50 min |
| Aug 1, 4:47 PM CDT | Severe Thunderstorm Warning | LBF | Garfield, Holt, Wheeler | 43 min |
| Aug 1, 5:02 PM CDT | Severe Thunderstorm Warning | OAX | Antelope, Boone, Platte | 28 min |
| Aug 1, 5:12 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 63 min |
| Aug 1, 5:14 PM CDT | Severe Thunderstorm Warning | LBF | Sheridan | 61 min |
| Aug 1, 5:19 PM CDT | Tornado Warning | LBF | Cherry | 41 min |
| Aug 1, 5:27 PM CDT | Severe Thunderstorm Warning | LBF | Garfield, Wheeler | 48 min |
| Aug 1, 5:28 PM CDT | Severe Thunderstorm Warning | OAX | Boone | 47 min |
| Aug 1, 5:49 PM CDT | Severe Thunderstorm Warning | GID | Greeley | 41 min |
| Aug 1, 5:50 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 40 min |
| Aug 1, 6:10 PM CDT | Severe Thunderstorm Warning | GID | Greeley | 20 min |
| Aug 1, 6:12 PM CDT | Severe Thunderstorm Warning | LBF | Sheridan | 48 min |
| Aug 1, 6:15 PM CDT | Severe Thunderstorm Warning | OAX | Boone, Platte | 30 min |
| Aug 1, 6:23 PM CDT | Severe Thunderstorm Warning | GID | Merrick, Nance, Polk | 52 min |
| Aug 1, 6:28 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 47 min |
| Aug 1, 6:32 PM CDT | Severe Thunderstorm Warning | UNR | Todd | 28 min |
| Aug 1, 6:42 PM CDT | Tornado Warning | GID | Greeley, Nance | 33 min |
| Aug 1, 7:02 PM CDT | Severe Thunderstorm Warning | GID | Merrick, Nance | 43 min |
| Aug 1, 7:04 PM CDT | Tornado Warning | LBF | Cherry, Grant, Hooker | 26 min |
| Aug 1, 7:25 PM CDT | Severe Thunderstorm Warning | LBF | Brown, Cherry | 50 min |
| Aug 1, 7:28 PM CDT | Severe Thunderstorm Warning | LBF | Garden, Sheridan | 62 min |
| Aug 1, 7:31 PM CDT | Severe Thunderstorm Warning | GID | Greeley, Valley | 44 min |
| Aug 1, 7:33 PM CDT | Tornado Warning | LBF | Cherry, Hooker | 27 min |
| Aug 1, 7:49 PM CDT | Severe Thunderstorm Warning | GID | Valley | 41 min |
| Aug 1, 7:52 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Logan | 38 min |
| Aug 1, 8:01 PM CDT | Severe Thunderstorm Warning | LBF | Hooker | 44 min |
| Aug 1, 8:03 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 42 min |
| Aug 1, 8:15 PM CDT | Severe Thunderstorm Warning | GID | Greeley, Howard, Sherman, Valley | 45 min |
| Aug 1, 8:15 PM CDT | Severe Thunderstorm Warning | LBF | Custer | 45 min |
| Aug 1, 8:24 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Lincoln | 51 min |
| Aug 1, 8:42 PM CDT | Severe Thunderstorm Warning | GID | Howard, Sherman | 48 min |
| Aug 1, 8:56 PM CDT | Severe Thunderstorm Warning | GID | Hall, Hamilton, Merrick | 49 min |
| Aug 1, 8:58 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Lincoln | 47 min |
| Aug 1, 9:06 PM CDT | Severe Thunderstorm Warning | GID | Hall, Howard | 39 min |
| Aug 1, 9:12 PM CDT | Severe Thunderstorm Warning | GID | Dawson | 48 min |
| Aug 1, 9:18 PM CDT | Tornado Warning | LBF | Custer | 27 min |
| Aug 1, 9:36 PM CDT | Severe Thunderstorm Warning | GID | Adams, Clay, Hall, Hamilton | 39 min |
| Aug 1, 9:41 PM CDT | Tornado Warning | GID | Dawson | 34 min |
| Aug 1, 9:57 PM CDT | Severe Thunderstorm Warning | LBF | Lincoln | 48 min |
| Aug 1, 9:58 PM CDT | Severe Thunderstorm Warning | GID | Dawson | 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 12:00Z, 6.4 hours before the alert went out and 153 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
- 1169 J/kg
- Mixed-layer CIN
- -172 J/kg
- Mixed-layer LCL
- 1035 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 8:16 AM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Boyd, Butler, Cedar, Colfax and 23 more | 59 min |
| Aug 1, 12:53 PM CDT | Mesoscale Discussion | SPC | Adams, Arthur, Blaine, Boone, Box Butte, Brown and 52 more | 2 hr |
| Aug 1, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | Burt, Cedar, Colfax, Cuming, Dakota, Dixon and 9 more | 8 hr |
| Aug 1, 3:25 PM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Arthur, Blaine, Boone, Box Butte and 57 more | 95 min |
| Aug 1, 3:59 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 11 more | 9 hr |
| Aug 1, 5:06 PM CDT | Mesoscale Discussion | SPC | Chase, Dundy, Hitchcock | 54 min |
| Aug 1, 5:09 PM CDT | Severe Thunderstorm Watch | SPC | Dundy, Hitchcock | 5 hr |
| Aug 1, 6:02 PM CDT | Mesoscale Discussion | SPC | Butler, Cass, Clay, Fillmore, Gage, Jefferson and 11 more | 58 min |
| Aug 1, 6:07 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Butler, Cass, Clay, Dawson and 26 more | 7 hr |
| Aug 1, 6:49 PM CDT | Mesoscale Discussion | SPC | Blaine, Brown, Cherry, Custer, Garfield, Grant and 13 more | 86 min |
Nearby
Tornado Watches in Nebraska, 2013Tornado Watches in South Dakota, 2013Every tornado watch in 2013
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.