Reported by SPC today.
It is the 5th strongest of the 82 detections recorded within 20 km of this point since 4 April 2026. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Hail 150 in near Kimball, St. Clair, MI. (DTX)
An estimated 291,707 people live within 50 km of this point.
Nearby, since 4 April 2026
- September 3, 2026 · score 49 · 0.0 km
- May 19, 2026 · score 43 · 1.1 km
- September 2, 2026 · score 67 · 7.0 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 49 out of 100, at 77 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 49 / 100 |
| Our confidence | 77% |
| Coordinates | 42.9500, -82.5600 |
| Nearest City | Port Huron (12 km) |
| Population Exposed | 291.7K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-03T11:37:48.011Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 150 |
| Location | Kimball |
| County | St. Clair |
| State | MI |
| Comments | (DTX) |
| Iem TypeSummary | M |
| Iem Magnitude | 54 |
| Iem Unit | mph |
| Iem City | Peche Island Light |
| Iem County | LCZ460 |
| Iem State | MI |
| Iem Wfo | DTX |
| MergedSources | [{"id":"iem_M_42.430_-82.870_1788418140000","source":"iem","severity":"low","severityValue":25,"timestamp":1788418140000,"latitude":42.43,"longitude":-82.87},{"id":"iem_M_42.360_-82.910_1788418260000","source":"iem","severity":"low","severityValue":25,"timestamp":1788418260000,"latitude":42.36,"longitude":-82.91}] |
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 8 March 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 near Port Huron?
Calamity.live data shows a weather event with CalamityScore 49/100, near Port Huron (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.