Reported by SPC today.
No stronger detection stands among the 23 recorded within 20 km of this point since 8 April 2026 — 17 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind 65 kt near 8 N Selfridge, Sioux, ND. Mesonet station TTKN8 Tatanka Prairie. (BIS)
Nearby, since 8 April 2026
- August 30, 2026 · score 22 · 11.5 km
- July 9, 2026 · score 22 · 14.9 km
How we know
Confirmed by 5 independent sources, including SPC.
Our own score for this event is 22 out of 100, at 50 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 50% |
| Coordinates | 46.1600, -100.9000 |
| Nearest City | Bismarck (73 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T00:25:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 65 |
| Location | 8 N Selfridge |
| County | Sioux |
| State | ND |
| Comments | Mesonet station TTKN8 Tatanka Prairie. (BIS) |
| Iem TypeSummary | G |
| Iem Magnitude | 57 |
| Iem Unit | MPH |
| Iem City | 15 SSW Leith |
| Iem County | Grant |
| Iem State | ND |
| Iem Wfo | BIS |
| Iem Remark | NDAWN Station Pretty Rock 2E. Report at 10 meters, 45 MPH observed at the surface. |
| MergedSources | [{"id":"iem_G_45.900_-101.500_1788133560000","source":"iem","severity":"low","severityValue":25,"timestamp":1788133560000,"latitude":45.9,"longitude":-101.5},{"id":"iem_G_46.440_-101.370_1788133680000","source":"iem","severity":"low","severityValue":25,"timestamp":1788133680000,"latitude":46.44,"longitude":-101.37},{"id":"iem_G_46.160_-100.900_1788135900000","source":"iem","severity":"low","severityValue":25,"timestamp":1788135900000,"latitude":46.16,"longitude":-100.9},{"id":"iem_G_46.160_-101.770_1788132120000","source":"iem","severity":"low","severityValue":25,"timestamp":1788132120000,"latitude":46.16,"longitude":-101.77}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.