This alert expired on 16 June 2026 at 21:15 UTC. It is kept here as a record.
No stronger detection stands among the 16 recorded within 20 km of this point since 16 March 2026 — one other scored the same. The last comparable one was on 10 June 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 16 at 4:44PM EDT until June 16 at 5:15PM EDT by NWS Grand Rapids MI
An estimated 210,907 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 16, 2026 · score 43 · 10.5 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 80 % 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 | 80% |
| Coordinates | 43.0319, -84.8894 |
| Nearest City | Waverly (39 km) |
| Population Exposed | 210.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-16T20:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d4ce8ab896c1e28511a19e194d6f7772 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mecosta, MI; Montcalm, MI; Clinton, MI; Gratiot, MI; Barry, MI; Eaton, MI |
| Headline | Severe Thunderstorm Warning issued June 16 at 4:44PM EDT until June 16 at 5:15PM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-16T17:15:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d4ce8ab896c1e28511a19e194d6f7772ab2d7381.002.1","noaa_urn:oid:2.49.0.1.840.0.5585c6e752d55016091a3c873f1531503a5163a1.001.1","noaa_urn:oid:2.49.0.1.840.0.44fcaa08bbd4526f09b318d18240d06e51913f4f.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 Waverly?
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 188 scientific monitoring sources.