Reported by SPC today.
It is the 35th strongest of the 93 detections recorded within 20 km of this point since 14 April 2026. The last comparable one was on 3 September 2026.
What the source measured
SPC reported: Wind 60 kt near SC S Harbor, LCZ460, MI. Measured at St. Clair Shores (CLSM4). (DTX)
An estimated 3,017,747 people live within 50 km of this point.
Nearby, since 14 April 2026
- September 4, 2026 · score 46 · 0.0 km
- September 3, 2026 · score 58 · 1.6 km
- May 18, 2026 · score 52 · 4.5 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 46 out of 100, at 90 % 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 | Medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 90% |
| Coordinates | 42.4700, -82.8800 |
| Nearest City | Saint Clair Shores (3 km) |
| Population Exposed | 3.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T00:14:38.903Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 60 |
| Location | SC S Harbor |
| County | LCZ460 |
| State | MI |
| Comments | Measured at St. Clair Shores (CLSM4). (DTX) |
| Iem TypeSummary | M |
| Iem Magnitude | 60 |
| Iem Unit | mph |
| Iem City | SC S Harbor |
| Iem County | LCZ460 |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Measured at St. Clair Shores (CLSM4). |
| MergedSources | [{"id":"iem_M_42.470_-82.880_1788466800000","source":"iem","severity":"low","severityValue":25,"timestamp":1788466800000,"latitude":42.47,"longitude":-82.88}] |
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 Saint Clair Shores?
Calamity.live data shows a weather event with CalamityScore 46/100, near Saint Clair Shores (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.