Alert archive / Nebraska / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 464
The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2011, 3:35 PM MDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2011, 3:35 PM MDT (21:35 UTC)
- Expired
- Jun 11, 2011, 9:46 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 43 counties
Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Logan County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Banner County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE, Perkins County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 98 km from the middle of the area, began a volume at 21:35 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
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 3:38 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 67 min |
| Jun 11, 3:40 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 35 min |
| Jun 11, 3:45 PM MDT | Severe Thunderstorm Warning | GLD | Greeley | 60 min |
| Jun 11, 3:50 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 17 min |
| Jun 11, 4:15 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 60 min |
| Jun 11, 4:18 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball | 15 min |
| Jun 11, 4:23 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 23 min |
| Jun 11, 4:30 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert, Lincoln, Washington | 60 min |
| Jun 11, 4:33 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 57 min |
| Jun 11, 4:50 PM MDT | Severe Thunderstorm Warning | CYS | Kimball | 20 min |
| Jun 11, 4:53 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 37 min |
| Jun 11, 4:57 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson, Yuma | 63 min |
| Jun 11, 4:58 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff, Sioux | 62 min |
| Jun 11, 5:12 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert, Lincoln, Washington | 36 min |
| Jun 11, 5:19 PM MDT | Tornado Warning | BOU | Lincoln | 22 min |
| Jun 11, 5:23 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball, Scotts Bluff | 37 min |
| Jun 11, 5:29 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 31 min |
| Jun 11, 5:30 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill, Scotts Bluff, Sioux | 31 min |
| Jun 11, 5:40 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson, Yuma | 65 min |
| Jun 11, 6:01 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Rawlins | 59 min |
| Jun 11, 6:02 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 27 min |
| Jun 11, 7:04 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 26 min |
| Jun 11, 7:13 PM MDT | Severe Thunderstorm Warning | LBF | Garden | 35 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
Denver, CO (KDNR), launched 12:00Z, 9.6 hours before the alert went out and 152 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
- 155 J/kg
- Mixed-layer CIN
- -355 J/kg
- Mixed-layer LCL
- 1833 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 76 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 |
|---|---|---|---|---|
| Jun 11, 11:44 AM MDT | Mesoscale Discussion | SPC | Baca, Bent, Crowley, Kiowa, Las Animas, Otero and 2 more | 91 min |
| Jun 11, 12:09 PM MDT | Severe Thunderstorm Watch | SPC | Baca, Bent, Crowley, El Paso, Huerfano, Kiowa and 4 more | 7 hr |
| Jun 11, 3:04 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Elbert, Kit Carson, Logan, Morgan and 4 more | 86 min |
| Jun 11, 4:43 PM MDT | Mesoscale Discussion | SPC | Baca, Bent, Crowley, Kiowa, Las Animas, Otero and 2 more | 62 min |
| Jun 10, 6:47 PM MDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 12 more | 58 min |
| Jun 10, 9:56 PM MDT | Mesoscale Discussion | SPC | Cherokee, Crawford | 94 min |
| Jun 11, 2:39 PM MDT | Severe Thunderstorm Watch | SPC | Barber, Clark, Comanche, Finney, Ford, Grant and 11 more | 9 hr |
| Jun 11, 1:40 PM MDT | Mesoscale Discussion | SPC | Banner, Box Butte, Dawes, Garden, Grant, Morrill and 3 more | 2 hr |
| Jun 11, 3:59 PM MDT | Tornado Watch | SPC | Campbell, Crook, Weston | 7 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2011Severe Thunderstorm Watches in Colorado, 2011Severe Thunderstorm Watches in Kansas, 2011Every severe thunderstorm watch in 2011
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.