This alert expired on 3 July 2026 at 22:45 UTC. It is kept here as a record.
No stronger detection stands among the 34 recorded within 20 km of this point since 17 March 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 5:11PM EDT until July 3 at 6:45PM EDT by NWS Grand Rapids MI
An estimated 334,324 people live within 50 km of this point.
Nearby, since 17 March 2026
- September 3, 2026 · score 37 · 2.5 km
- July 3, 2026 · score 43 · 5.5 km
- September 3, 2026 · score 37 · 9.5 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 87 % 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 | 87% |
| Coordinates | 42.5092, -84.8421 |
| Nearest City | Holt (30 km) |
| Population Exposed | 334.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T21:11:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.b017b9e6ab96abfda5d875ea63fbefbd |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clinton, MI; Ingham, MI; Branch, MI; Hillsdale, MI; Barry, MI and 6 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 5:11PM EDT until July 3 at 6:45PM EDT by NWS Grand Rapids MI |
| Expires | 2026-07-03T18:45:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b017b9e6ab96abfda5d875ea63fbefbd272f635e.001.1","noaa_urn:oid:2.49.0.1.840.0.5e38ba470135de22dee642fcfa55ffb888299d33.001.1","noaa_urn:oid:2.49.0.1.840.0.3315bef396f2e8a60808175cf6b03b9a2f860b0c.001.1","noaa_urn:oid:2.49.0.1.840.0.0039e15c7e67881615804757daddd84b10221b5f.001.1","noaa_urn:oid:2.49.0.1.840.0.69dac123fb3023853bc58da785af802d7779c588.001.1","noaa_urn:oid:2.49.0.1.840.0.c622c8cbb79858b1407ae9aabd851606ae61dbd5.001.1","noaa_urn:oid:2.49.0.1.840.0.732c257a4175adbf229b212cf3d38d830c8b7653.001.1","noaa_urn:oid:2.49.0.1.840.0.19bdbb01bbae8ea1b01fe652a37b9bf8a79ea9d5.001.1","noaa_urn:oid:2.49.0.1.840.0.b120d14e3dcc7999c8c33f086af3d58b6dbb15c3.001.1"] |
| Iem TypeSummary | D |
| Iem City | Plainwell |
| Iem County | Allegan |
| Iem State | MI |
| Iem Wfo | GRR |
| Iem Remark | Reports of trees and large branches down on roads. |
| MergedSources | [{"id":"iem_D_42.220_-85.590_1783108560000","source":"iem","severity":"low","severityValue":25,"timestamp":1783108560000,"latitude":42.22,"longitude":-85.59},{"id":"iem_G_42.230_-85.550_1783109100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783109100000,"latitude":42.23,"longitude":-85.55},{"id":"iem_D_42.450_-85.650_1783110060000","source":"iem","severity":"low","severityValue":25,"timestamp":1783110060000,"latitude":42.45,"longitude":-85.65}] |
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 Holt?
Calamity.live data shows a weather event with CalamityScore 43/100, near Holt (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.