Alert archive / South Dakota / Severe Thunderstorm Watches in 2006
Severe Thunderstorm Watch 730
The Storm Prediction Center issued this severe thunderstorm watch at Aug 20, 2006, 4:50 PM CDT for 4 counties in North Dakota; 22 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 20, 2006, 4:50 PM CDT (21:50 UTC)
- Expired
- Aug 20, 2006, 9:38 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 26 counties
Dickey County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Bennett County, SD, Brown County, SD, Buffalo County, SD, Campbell County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, McPherson County, SD, Mellette County, SD, Potter County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 135 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
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 4:50 PM CDT | Severe Thunderstorm Warning | ABR | Jones | 40 min |
| Aug 20, 4:51 PM CDT | Severe Thunderstorm Warning | BIS | LaMoure | 54 min |
| Aug 20, 5:13 PM CDT | Tornado Warning | BIS | LaMoure | 32 min |
| Aug 20, 5:15 PM CDT | Severe Thunderstorm Warning | ABR | Stanley | 45 min |
| Aug 20, 5:18 PM CDT | Severe Thunderstorm Warning | BIS | Dickey | 57 min |
| Aug 20, 5:27 PM CDT | Severe Thunderstorm Warning | ABR | Jones | 37 min |
| Aug 20, 5:39 PM CDT | Tornado Warning | BIS | Dickey | 36 min |
| Aug 20, 5:44 PM CDT | Severe Thunderstorm Warning | BIS | LaMoure | 36 min |
| Aug 20, 5:50 PM CDT | Severe Thunderstorm Warning | ABR | Campbell | 25 min |
| Aug 20, 6:00 PM CDT | Severe Thunderstorm Warning | ABR | Stanley | 30 min |
| Aug 20, 6:10 PM CDT | Severe Thunderstorm Warning | BIS | McIntosh | 65 min |
| Aug 20, 6:16 PM CDT | Severe Thunderstorm Warning | BIS | Dickey | 59 min |
| Aug 20, 6:17 PM CDT | Severe Thunderstorm Warning | ABR | Potter | 43 min |
| Aug 20, 6:21 PM CDT | Severe Thunderstorm Warning | ABR | Lyman | 29 min |
| Aug 20, 6:28 PM CDT | Severe Thunderstorm Warning | ABR | Hyde, Sully | 47 min |
| Aug 20, 6:29 PM CDT | Tornado Warning | BIS | Dickey | 31 min |
| Aug 20, 6:30 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 60 min |
| Aug 20, 6:40 PM CDT | Severe Thunderstorm Warning | BIS | LaMoure | 38 min |
| Aug 20, 6:43 PM CDT | Flash Flood Warning | ABR | Stanley | 2 hr |
| Aug 20, 6:58 PM CDT | Severe Thunderstorm Warning | ABR | Potter | 47 min |
| Aug 20, 7:21 PM CDT | Severe Thunderstorm Warning | ABR | Edmunds | 54 min |
| Aug 20, 7:31 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 26 min |
| Aug 20, 7:32 PM CDT | Flash Flood Warning | ABR | Potter | 28 min |
| Aug 20, 7:36 PM CDT | Flash Flood Warning | ABR | Potter | 2 hr |
| Aug 20, 7:40 PM CDT | Severe Thunderstorm Warning | ABR | Hyde, Sully | 39 min |
| Aug 20, 7:59 PM CDT | Flash Flood Warning | ABR | Edmunds | 3 hr |
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 20, 2:31 PM CDT | Mesoscale Discussion | SPC | Emmons, Kidder, Logan, McIntosh | 119 min |
| Aug 20, 6:08 PM CDT | Mesoscale Discussion | SPC | Dickey, McIntosh | 97 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2006Severe Thunderstorm Watches in North Dakota, 2006Every severe thunderstorm watch in 2006
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.