Alert archive / South Dakota / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 161
The Storm Prediction Center issued this severe thunderstorm watch at Jun 7, 2018, 3:49 PM MDT for 7 counties in Montana; 11 counties in South Dakota; 9 counties in Wyoming. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 7, 2018, 3:49 PM MDT (21:49 UTC)
- Expired
- Jun 8, 2018, 1:00 AM MDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 27 counties
Big Horn County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Powder River County, MT, Rosebud County, MT, Treasure County, MT, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD, Big Horn County, WY, Campbell County, WY, Converse County, WY, Crook County, WY, Johnson County, WY, Niobrara County, WY, Sheridan County, WY, Washakie County, WY, Weston County, WY
The radar
The Billings radar (KBLX), 246 km from the middle of the area, began a volume at 21:51 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
- 2%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
28 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 4:09 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Carbon | 51 min |
| Jun 7, 4:53 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure | 52 min |
| Jun 7, 4:57 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| Jun 7, 5:07 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 23 min |
| Jun 7, 5:16 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 59 min |
| Jun 7, 5:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure, Yellowstone | 48 min |
| Jun 7, 5:28 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 47 min |
| Jun 7, 5:38 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 37 min |
| Jun 7, 5:50 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence, Meade, Pennington | 28 min |
| Jun 7, 5:54 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 66 min |
| Jun 7, 6:14 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 61 min |
| Jun 7, 6:19 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 41 min |
| Jun 7, 6:26 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 34 min |
| Jun 7, 6:27 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 34 min |
| Jun 7, 6:38 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 52 min |
| Jun 7, 6:41 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 49 min |
| Jun 7, 6:54 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 51 min |
| Jun 7, 7:00 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 60 min |
| Jun 7, 7:07 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 38 min |
| Jun 7, 7:30 PM MDT | Flash Flood Warning | BYZ | Custer | 3 hr |
| Jun 7, 7:33 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 42 min |
| Jun 7, 8:06 PM MDT | Severe Thunderstorm Warning | UNR | Fall River | 24 min |
| Jun 7, 8:12 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 63 min |
| Jun 7, 8:35 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Harding | 55 min |
| Jun 7, 9:02 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 58 min |
| Jun 7, 9:22 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Harding, Perkins | 53 min |
| Jun 7, 9:54 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Meade, Perkins | 66 min |
| Jun 7, 10:28 PM MDT | Severe Thunderstorm Warning | UNR | Meade, Perkins | 62 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 7, 10:24 AM MDT | Mesoscale Discussion | SPC | Dawson, Fergus, Garfield, McCone, Musselshell, Petroleum and 5 more | 66 min |
| Jun 7, 1:20 PM MDT | Mesoscale Discussion | SPC | Beaverhead, Broadwater, Carbon, Deer Lodge, Gallatin, Jefferson and 6 more | 85 min |
| Jun 7, 1:51 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Dawson, Fallon, McCone, Powder River and 5 more | 84 min |
| Jun 7, 5:16 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Dawson, Fallon, McCone, Powder River and 4 more | 119 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2018Severe Thunderstorm Watches in Wyoming, 2018Severe Thunderstorm Watches in Montana, 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; radar from the NEXRAD Level II archive.