This alert expired on 18 May 2026 at 21:00 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 4 April 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 18 at 4:25PM EDT until May 18 at 5:00PM EDT by NWS Wilmington OH
An estimated 1,227,846 people live within 50 km of this point.
Nearby, since 4 April 2026
- July 3, 2026 · score 52 · 14.2 km
- May 19, 2026 · score 52 · 16.9 km
- July 3, 2026 · score 48 · 20.5 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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) | 52 / 100 |
| Our confidence | 89% |
| Coordinates | 42.5654, -83.7591 |
| Nearest City | Novi (25 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T20:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.10de0c1a013f30bb49b91a42b73f0c72 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Darke, OH; Mercer, OH; Jackson, MI; Lenawee, MI and 12 more areas |
| Headline | Severe Thunderstorm Warning issued May 18 at 4:25PM EDT until May 18 at 5:00PM EDT by NWS Wilmington OH |
| Expires | 2026-05-18T17:00:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 15 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.10de0c1a013f30bb49b91a42b73f0c72c5cd6d17.001.1","noaa_urn:oid:2.49.0.1.840.0.1136db7bd981435337ac5771a230ee969b5c1976.002.1","noaa_urn:oid:2.49.0.1.840.0.b31e30af91ca74566c18b6adf99648f350d15666.001.1","noaa_urn:oid:2.49.0.1.840.0.92eb96f86063a3bea059f59dfc303939f65bcd0c.001.1","noaa_urn:oid:2.49.0.1.840.0.fa84ae9bddf325fa885e8813a9fb28bf754f3532.001.1","noaa_urn:oid:2.49.0.1.840.0.fa1ac678d26198afb1d9d30556c391c2c1e946a5.001.1","noaa_urn:oid:2.49.0.1.840.0.e559e2c676dcdb787880a915bfe56566e9132214.002.1","noaa_urn:oid:2.49.0.1.840.0.107a5a8b7a8c79ced8d72a4a7c77da337d78e238.001.1","noaa_urn:oid:2.49.0.1.840.0.a83e185b6abbbdebff44f27c882250973f2ec9fd.001.1","noaa_urn:oid:2.49.0.1.840.0.899cb54fca11c69016690b4b397b5bd487fb2ed8.001.1","noaa_urn:oid:2.49.0.1.840.0.bd8cbe55909112d717618ad6f30e619aecbea996.001.1","noaa_urn:oid:2.49.0.1.840.0.cf7e9494bb08326dfda41e42bda4d1cbb67a52be.001.1","noaa_urn:oid:2.49.0.1.840.0.676a53f997693e6ad45ba2519a2d5772b82540c1.001.1","noaa_urn:oid:2.49.0.1.840.0.5cb96de7542c0e04887bcdb00af61de3096b5684.001.1","noaa_urn:oid:2.49.0.1.840.0.7dc4fb407b74892a7eb9abf2b8c042b6ed21ce4c.001.1"] |
| Google News RssFeed | weather |
| Google News SourceName | ClickOnDetroit | WDIV Local 4 |
| MergedSources | [{"id":"gnews_weather_494202_148","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779130324000,"latitude":42.33,"longitude":-83.05},{"id":"gnews_weather_494203_153","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779131397000,"latitude":42.33,"longitude":-83.05},{"id":"gnews_weather_494203_158","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779133500000,"latitude":42.33,"longitude":-83.05},{"id":"gnews_weather_494201_166","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779124382000,"latitude":42.33,"longitude":-83.05},{"id":"gnews_weather_494201_169","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779124179000,"latitude":42.33,"longitude":-83.05}] |
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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Novi (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.