Reported by SPC today.
No stronger detection stands among the 197 recorded within 20 km of this point since 15 March 2026 — 27 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind 60 kt near Rapid City Arpt, Pennington, SD. (UNR)
An estimated 73,569 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 31, 2026 · score 39 · 0.0 km
- June 4, 2026 · score 39 · 14.5 km
- July 2, 2026 · score 39 · 22.1 km
How we know
Confirmed by 7 independent sources, including SPC.
Our own score for this event is 39 out of 100, at 86 % 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) | 39 / 100 |
| Our confidence | 86% |
| Coordinates | 44.0500, -103.0600 |
| Nearest City | Rapid City (14 km) |
| Population Exposed | 73.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-31T01:23:29.963Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 60 |
| Location | Rapid City Arpt |
| County | Pennington |
| State | SD |
| Comments | (UNR) |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | mph |
| Iem City | Rapid City Arpt |
| Iem County | Pennington |
| Iem State | SD |
| Iem Wfo | UNR |
| MergedSources | [{"id":"iem_G_44.000_-103.000_1788132600000","source":"iem","severity":"low","severityValue":25,"timestamp":1788132600000,"latitude":44,"longitude":-103},{"id":"iem_G_43.740_-102.920_1788133200000","source":"iem","severity":"low","severityValue":25,"timestamp":1788133200000,"latitude":43.74,"longitude":-102.92},{"id":"iem_G_44.000_-103.000_1788132300000","source":"iem","severity":"low","severityValue":25,"timestamp":1788132300000,"latitude":44,"longitude":-103},{"id":"iem_G_44.000_-103.000_1788131400000","source":"iem","severity":"low","severityValue":25,"timestamp":1788131400000,"latitude":44,"longitude":-103},{"id":"iem_G_44.050_-103.060_1788130740000","source":"iem","severity":"low","severityValue":25,"timestamp":1788130740000,"latitude":44.05,"longitude":-103.06},{"id":"iem_G_44.050_-103.060_1788131280000","source":"iem","severity":"low","severityValue":25,"timestamp":1788131280000,"latitude":44.05,"longitude":-103.06}] |
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 39/100, near Rapid City (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.