Alert archive / Colorado / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 587
The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 2008, 6:22 PM MDT for 4 states. It was in force for 27 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2008, 6:22 PM MDT (00:22 UTC)
- Expired
- Jun 20, 2008, 9:00 PM MDT
- In force
- 27 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 37 counties
Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Elbert County, CO, Jefferson County, CO, Larimer 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, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Custer County, SD, Fall River County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY
The radar
The Cheyenne radar (KCYS), 186 km from the middle of the area, began a volume at 00:25 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
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
43 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 6:40 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Morrill, Scotts Bluff | 50 min |
| Jun 19, 6:50 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff, Sioux | 40 min |
| Jun 19, 7:20 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Morrill | 40 min |
| Jun 19, 7:30 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Scotts Bluff | 45 min |
| Jun 19, 7:54 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 51 min |
| Jun 19, 8:13 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Scotts Bluff | 47 min |
| Jun 19, 8:26 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 49 min |
| Jun 19, 8:31 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 44 min |
| Jun 19, 8:58 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe | 33 min |
| Jun 19, 9:06 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips, Sedgwick | 23 min |
| Jun 19, 9:43 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 28 min |
| Jun 20, 11:37 AM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 38 min |
| Jun 20, 12:08 PM MDT | Tornado Warning | BOU | Lincoln | 37 min |
| Jun 20, 1:09 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 51 min |
| Jun 20, 1:51 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Pennington | 54 min |
| Jun 20, 2:23 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 67 min |
| Jun 20, 2:39 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 51 min |
| Jun 20, 2:41 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence, Meade, Pennington | 64 min |
| Jun 20, 2:52 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence, Meade | 53 min |
| Jun 20, 3:31 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 44 min |
| Jun 20, 3:34 PM MDT | Severe Thunderstorm Warning | UNR | Meade, Pennington | 24 min |
| Jun 20, 3:41 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 64 min |
| Jun 20, 4:13 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 49 min |
| Jun 20, 4:48 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 57 min |
| Jun 20, 4:48 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 29 min |
| Jun 20, 5:00 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 47 min |
| Jun 20, 5:14 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 46 min |
| Jun 20, 5:22 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 38 min |
| Jun 20, 5:34 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Fall River | 34 min |
| Jun 20, 5:44 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 41 min |
| Jun 20, 5:49 PM MDT | Tornado Warning | BOU | Morgan | 26 min |
| Jun 20, 5:59 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 26 min |
| Jun 20, 6:01 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook | 74 min |
| Jun 20, 6:03 PM MDT | Tornado Warning | BOU | Adams | 42 min |
| Jun 20, 6:19 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 56 min |
| Jun 20, 6:43 PM MDT | Tornado Warning | BOU | Adams, Arapahoe | 38 min |
| Jun 20, 7:03 PM MDT | Tornado Warning | BOU | Elbert, Lincoln, Washington | 42 min |
| Jun 20, 7:17 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Sioux | 43 min |
| Jun 20, 7:37 PM MDT | Tornado Warning | BOU | Lincoln | 38 min |
| Jun 20, 7:43 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 37 min |
| Jun 20, 7:50 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 40 min |
| Jun 20, 8:16 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 44 min |
| Jun 20, 8:26 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 49 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
Rapid City, SD (KUNR), launched 00:00Z, 0.4 hours before the alert went out and 210 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
- 258 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 1901 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 54 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 20, 11:06 AM MDT | Mesoscale Discussion | SPC | Bent, Cheyenne, Crowley, Elbert, El Paso, Kiowa and 4 more | 84 min |
| Jun 20, 11:56 AM MDT | Severe Thunderstorm Watch | SPC | Baca, Bent, Cheyenne, Crowley, Custer, Douglas and 11 more | 7 hr |
| Jun 20, 2:31 PM MDT | Mesoscale Discussion | SPC | Adams, Broomfield, Denver, Larimer, Logan, Morgan and 2 more | 59 min |
| Jun 20, 4:18 PM MDT | Mesoscale Discussion | SPC | Baca, Bent, Cheyenne, Crowley, Elbert, El Paso and 7 more | 57 min |
| Jun 19, 7:32 PM MDT | Mesoscale Discussion | SPC | Burt, Butler, Cass, Colfax, Cuming, Dodge and 18 more | 58 min |
| Jun 20, 4:57 PM MDT | Mesoscale Discussion | SPC | Adams, Buffalo, Cass, Clay, Dawson, Fillmore and 24 more | 63 min |
| Jun 20, 12:22 PM MDT | Mesoscale Discussion | SPC | Albany, Campbell, Converse, Goshen, Johnson, Laramie and 4 more | 83 min |
Nearby
Severe Thunderstorm Watches in Colorado, 2008Severe Thunderstorm Watches in Nebraska, 2008Severe Thunderstorm Watches in Wyoming, 2008Every severe thunderstorm watch in 2008
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.