Reported by SPC today.
It is the 13th strongest of the 47 detections recorded within 20 km of this point since 15 April 2026. The last comparable one was on 3 September 2026.
What the source measured
SPC reported: Wind UNK kt near 4 W Ann Arbor, Washtenaw, MI. Trees down at Jackson and Zeeb Rd near Meijer (DTX)
An estimated 946,206 people live within 50 km of this point.
Nearby, since 15 April 2026
- May 18, 2026 · score 52 · 11.4 km
- September 4, 2026 · score 46 · 16.7 km
- July 3, 2026 · score 48 · 17.9 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 41 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) | 41 / 100 |
| Our confidence | 90% |
| Coordinates | 42.2800, -83.8100 |
| Nearest City | Ann Arbor (6 km) |
| Population Exposed | 946.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T00:21:07.904Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | 4 W Ann Arbor |
| County | Washtenaw |
| State | MI |
| Comments | Trees down at Jackson and Zeeb Rd near Meijer (DTX) |
| Iem TypeSummary | D |
| Iem City | 4 W Ann Arbor |
| Iem County | Washtenaw |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Trees down at Jackson and Zeeb Rd near Meijer |
| MergedSources | [{"id":"iem_D_42.280_-83.810_1788464580000","source":"iem","severity":"low","severityValue":25,"timestamp":1788464580000,"latitude":42.28,"longitude":-83.81}] |
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 Ann Arbor?
Calamity.live data shows a weather event with CalamityScore 41/100, near Ann Arbor (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.