Reported by SPC today.
No stronger detection stands among the 64 recorded within 20 km of this point since 17 May 2026 — 42 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Hail 100 in near Fairfax, Gregory, SD. Heavy rainfall accompanied mostly dime sized hail... but a few stones were as big as a quarter. (FSD)
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 28 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) | 28 / 100 |
| Our confidence | 70% |
| Coordinates | 43.0200, -98.8900 |
| Nearest City | Mitchell (104 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T01:41:39.378Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 100 |
| Location | Fairfax |
| County | Gregory |
| State | SD |
| Comments | Heavy rainfall accompanied mostly dime sized hail... but a few stones were as big as a quarter. (FSD) |
| Iem TypeSummary | H |
| Iem Magnitude | 0.88 |
| Iem Unit | Inch |
| Iem City | 1 SSW Fairfax |
| Iem County | Gregory |
| Iem State | SD |
| Iem Wfo | FSD |
| MergedSources | [{"id":"iem_H_43.020_-98.890_1788298800000","source":"iem","severity":"low","severityValue":25,"timestamp":1788298800000,"latitude":43.02,"longitude":-98.89},{"id":"iem_H_43.010_-98.900_1788298740000","source":"iem","severity":"low","severityValue":25,"timestamp":1788298740000,"latitude":43.01,"longitude":-98.9}] |
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 28/100 (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.