This alert expired on 18 May 2026 at 20:45 UTC. It is kept here as a record.
No stronger detection stands among the 39 recorded within 20 km of this point since 16 March 2026 — 3 others scored the same. 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 18 at 3:48PM EDT until May 18 at 4:45PM EDT by NWS Detroit/Pontiac MI
An estimated 216,236 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 17, 2026 · score 37 · 6.0 km
- August 10, 2026 · score 43 · 11.8 km
- August 10, 2026 · score 43 · 17.6 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.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 79% |
| Coordinates | 42.2895, -84.2594 |
| Nearest City | Jackson (12 km) |
| Population Exposed | 216.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T19:48:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.bf42bc01a661979f1f99d7fca9d4472c |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lenawee, MI; Adams, IN; Wells, IN; Livingston, MI and 8 more areas |
| Headline | Severe Thunderstorm Warning issued May 18 at 3:48PM EDT until May 18 at 4:45PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-05-18T16:45:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bf42bc01a661979f1f99d7fca9d4472c282c00d5.001.1","noaa_urn:oid:2.49.0.1.840.0.02bec43fd129b7408f8682ab64d9db3e1a4f001e.001.1","noaa_urn:oid:2.49.0.1.840.0.dc15b4e8e7498332eb293910427c0ae725c2132b.001.1","noaa_urn:oid:2.49.0.1.840.0.fde0627046b4551388e39387da5bb6b9e13085d6.002.1","noaa_urn:oid:2.49.0.1.840.0.a63b2824003e3cae9a86f4cd4c5272b16caf03a9.001.1","noaa_urn:oid:2.49.0.1.840.0.fd22478009eebf3e88b63382b4b51cf52916e445.001.1","noaa_urn:oid:2.49.0.1.840.0.d78f8a6c56e3e1ab9f777e0ebdfdece9a9b4f0dc.001.1","noaa_urn:oid:2.49.0.1.840.0.87d66536b7ae416cfd5cc15e5c2a327634961167.001.1","noaa_urn:oid:2.49.0.1.840.0.ed20964195b85aedb1163d6046168fede8140b87.001.1","noaa_urn:oid:2.49.0.1.840.0.c3c538ba4d7e3e22e19a793f2c8b6ca888b9a897.001.1","noaa_urn:oid:2.49.0.1.840.0.95553abfb8460fcf4a1119021eb73c348f61736e.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 10 February 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 Jackson?
Calamity.live data shows a weather event with CalamityScore 43/100, near Jackson (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.