This alert expired on 3 September 2026 at 21:45 UTC. It is kept here as a record.
It is the 16th strongest of the 52 detections recorded within 20 km of this point since 26 March 2026. The last comparable one was on 2 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 4:08PM EDT until September 3 at 5:45PM EDT by NWS Cleveland OH
An estimated 2,146,957 people live within 50 km of this point.
Nearby, since 26 March 2026
- June 14, 2026 · score 52 · 6.4 km
- September 3, 2026 · score 76 · 6.6 km
- July 3, 2026 · score 52 · 7.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 86 % 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 | 86% |
| Coordinates | 41.9456, -83.3465 |
| Nearest City | Monroe (5 km) |
| Population Exposed | 2.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T20:08:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.62b9703298afd36aa8ebc3ea0b0ad355969ceaca.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lucas, OH; Wood, OH; Monroe, MI; Wayne, MI |
| Headline | Severe Thunderstorm Warning issued September 3 at 4:08PM EDT until September 3 at 5:45PM EDT by NWS Cleveland OH |
| Expires | 2026-09-03T17:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.62b9703298afd36aa8ebc3ea0b0ad355969ceaca.001.1","noaa_urn:oid:2.49.0.1.840.0.fd72eccd4f422170c1f7ffba6dac0c073b21814a.001.1","noaa_urn:oid:2.49.0.1.840.0.c0567b644b21968c6056c55552d466b0f3bddd2f.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 3 W Hudson Mills |
| Spc County | Washtenaw |
| Spc State | MI |
| Spc Comments | Trees and power lines downed. (DTX) |
| MergedSources | [{"id":"spc_wind_42.38_-83.98_38","source":"spc","severity":"medium","severityValue":45,"timestamp":1788463800000,"latitude":42.38,"longitude":-83.98}] |
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 Monroe?
Calamity.live data shows a weather event with CalamityScore 46/100, near Monroe (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.