Alert archive / Colorado / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 395
The Storm Prediction Center issued this severe thunderstorm watch at Jun 15, 2012, 1:35 PM MDT for 4 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 15, 2012, 1:35 PM MDT (19:35 UTC)
- Expired
- Jun 15, 2012, 9:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 32 counties
Adams County, CO, Arapahoe County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Washington County, CO, Weld 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, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Crook County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 178 km from the middle of the area, began a volume at 19:36 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
- 80%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 1:56 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 47 min |
| Jun 15, 2:18 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Fall River | 57 min |
| Jun 15, 2:20 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas | 40 min |
| Jun 15, 2:33 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 42 min |
| Jun 15, 2:38 PM MDT | Severe Thunderstorm Warning | UNR | Fall River | 67 min |
| Jun 15, 3:02 PM MDT | Tornado Warning | BOU | Adams | 28 min |
| Jun 15, 3:35 PM MDT | Flash Flood Warning | UNR | Fall River | 4 hr |
| Jun 15, 3:36 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 54 min |
| Jun 15, 3:42 PM MDT | Severe Thunderstorm Warning | UNR | Fall River | 63 min |
| Jun 15, 3:52 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 38 min |
| Jun 15, 4:09 PM MDT | Severe Thunderstorm Warning | UNR | Bennett, Jackson | 66 min |
| Jun 15, 4:18 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Meade, Pennington, Ziebach | 57 min |
| Jun 15, 4:27 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 46 min |
| Jun 15, 4:30 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 60 min |
| Jun 15, 5:17 PM MDT | Severe Thunderstorm Warning | UNR | Meade, Pennington | 37 min |
| Jun 15, 5:37 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball | 38 min |
| Jun 15, 5:59 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 31 min |
| Jun 15, 7:21 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball | 39 min |
| Jun 15, 7:57 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball | 33 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 7:12 PM MDT | Mesoscale Discussion | SPC | Baca, Prowers | 93 min |
| Jun 15, 12:54 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Bent, Cheyenne, Crowley, Elbert and 12 more | 96 min |
| Jun 15, 3:59 PM MDT | Mesoscale Discussion | SPC | Cherry, Sheridan | 91 min |
| Jun 15, 4:14 PM MDT | Severe Thunderstorm Watch | SPC | Brown, Cherry, Keya Paha, Sheridan | 6 hr |
Nearby
Severe Thunderstorm Watches in Colorado, 2012Severe Thunderstorm Watches in South Dakota, 2012Severe Thunderstorm Watches in Nebraska, 2012Every severe thunderstorm watch in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.