This alert expired on 19 May 2026 at 21:45 UTC. It is kept here as a record.
It is the 4th strongest of the 31 detections recorded within 20 km of this point since 26 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 5:08PM EDT until May 19 at 5:45PM EDT by NWS Detroit/Pontiac MI
An estimated 354,048 people live within 50 km of this point.
Nearby, since 26 March 2026
- May 19, 2026 · score 43 · 6.9 km
- July 3, 2026 · score 43 · 14.7 km
- August 10, 2026 · score 67 · 15.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 79% |
| Coordinates | 41.4452, -84.0646 |
| Nearest City | Defiance (31 km) |
| Population Exposed | 354.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T21:08:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.94912e12cd59de3d2687da2cf75e970d |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Monroe, MI; Wayne, MI; Defiance, OH; Paulding, OH; Putnam, OH; St. Clair, MI and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 19 at 5:08PM EDT until May 19 at 5:45PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-05-19T17:45:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.94912e12cd59de3d2687da2cf75e970d48187486.001.1","noaa_urn:oid:2.49.0.1.840.0.09d77515e54f1ab6095b75ba6a5c20c9025edfc0.001.1","noaa_urn:oid:2.49.0.1.840.0.a8efccf32a1f6f4213a2fe544b87cfcd1c58742a.001.1","noaa_urn:oid:2.49.0.1.840.0.404724ca80b4c7cfe94ba87b618e08ee19591db7.001.1"] |
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.
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Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.