Reported by SPC today.
It is the 59th strongest of the 122 detections recorded within 20 km of this point since 17 May 2026. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Hail 175 in near 1 WSW Marty, Charles Mix, SD. In addition to golf ball sized hail... winds were gusting at 40-50 mph... and rainfall was heavy. (FSD)
Nearby, since 17 May 2026
- September 1, 2026 · score 28 · 16.7 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 23 out of 100, at 70 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 23 / 100 |
| Our confidence | 70% |
| Coordinates | 42.9900, -98.4400 |
| Nearest City | Mitchell (87 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T03:12:06.599Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 175 |
| Location | 1 WSW Marty |
| County | Charles Mix |
| State | SD |
| Comments | In addition to golf ball sized hail... winds were gusting at 40-50 mph... and rainfall was heavy. (FSD) |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 1 WSW Marty |
| Iem County | Charles Mix |
| Iem State | SD |
| Iem Wfo | FSD |
| Iem Remark | In addition to golf ball sized hail, winds were gusting at 40-50 mph, and rainfall was heavy. |
| MergedSources | [{"id":"iem_H_42.990_-98.440_1788304680000","source":"iem","severity":"low","severityValue":25,"timestamp":1788304680000,"latitude":42.99,"longitude":-98.44}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 23/100 (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.