Reported by SPC yesterday.
No stronger detection stands among the 45 recorded within 20 km of this point since 17 April 2026 — 14 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind 63 kt near 7 W Ardmore, Fall River, SD. (UNR)
How we know
Confirmed by 4 independent sources, including SPC.
Our own score for this event is 22 out of 100, at 65 % 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 | 65% |
| Coordinates | 43.0400, -103.8000 |
| Nearest City | Rapid City (124 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-29T22:25:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 63 |
| Location | 7 W Ardmore |
| County | Fall River |
| State | SD |
| Comments | (UNR) |
| Iem TypeSummary | G |
| Iem Magnitude | 74 |
| Iem Unit | MPH |
| Iem City | 18 NNE Harrison |
| Iem County | Sioux |
| Iem State | NE |
| Iem Wfo | CYS |
| MergedSources | [{"id":"iem_G_43.040_-103.800_1788042300000","source":"iem","severity":"low","severityValue":25,"timestamp":1788042300000,"latitude":43.04,"longitude":-103.8},{"id":"iem_G_43.040_-103.800_1788042000000","source":"iem","severity":"low","severityValue":25,"timestamp":1788042000000,"latitude":43.04,"longitude":-103.8},{"id":"iem_G_42.920_-103.710_1788042240000","source":"iem","severity":"low","severityValue":25,"timestamp":1788042240000,"latitude":42.92,"longitude":-103.71}] |
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, near Rapid City (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.