Alert archive / South Dakota / Severe Thunderstorm Watches in 2019
Severe Thunderstorm Watch 620
The Storm Prediction Center issued this severe thunderstorm watch at Aug 25, 2019, 6:33 PM MDT for 13 counties in South Dakota; Crook County, Weston County, Wyoming. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2019, 6:33 PM MDT (00:33 UTC)
- Expired
- Aug 26, 2019, 1:00 AM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
Counties Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Todd County, SD, Tripp County, SD, Crook County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 15 km from the middle of the area, began a volume at 00:36 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 6:39 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 54 min |
| Aug 25, 6:54 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 70 min |
| Aug 25, 7:29 PM MDT | Severe Thunderstorm Warning | UNR | Crook, Weston | 46 min |
| Aug 25, 7:55 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Fall River | 65 min |
| Aug 25, 8:51 PM MDT | Severe Thunderstorm Warning | UNR | Fall River, Oglala Lakota | 54 min |
| Aug 25, 9:14 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Meade, Pennington | 61 min |
| Aug 25, 9:45 PM MDT | Severe Thunderstorm Warning | UNR | Fall River, Oglala Lakota | 43 min |
| Aug 25, 10:18 PM MDT | Severe Thunderstorm Warning | UNR | Bennett, Oglala Lakota | 57 min |
| Aug 25, 11:04 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Jackson, Mellette | 56 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 |
|---|---|---|---|---|
| Aug 25, 6:15 PM MDT | Mesoscale Discussion | SPC | Custer, Fall River, Lawrence, Pennington | 2 hr |
| Aug 25, 8:49 PM MDT | Mesoscale Discussion | SPC | Bennett, Bon Homme, Brule, Charles Mix, Custer, Douglas and 10 more | 116 min |
| Aug 26, 12:05 AM MDT | Mesoscale Discussion | SPC | Gregory, Jones, Lyman, Mellette, Todd, Tripp | 55 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2019Severe Thunderstorm Watches in Wyoming, 2019Every severe thunderstorm watch in 2019
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.