Right now
The most recent data we hold from NOAA arrived 1 minute ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 11 June 2026 at 00:45 UTC. It is kept here as a record.
It is the 4th strongest of the 61 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 10 at 8:34PM EDT until June 10 at 8:45PM EDT by NWS Grand Rapids MI
Urban PEI: 282,735 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- June 11, 2026 · score 37 · 0.1 km
- September 4, 2026 · score 37 · 12.9 km
- September 3, 2026 · score 37 · 12.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 37 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 42.4734, -84.3878 |
| Nearest City | Holt (21 km) |
| Urban exposure index (PEI) | 282.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T00:34:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.33ca1616ad66735f2fb624c54ee8550a |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-11T00:34:00.000Z.
First archived: 2026-06-11T00:36:43.636Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Ingham, MI; Jackson, MI; Livingston, MI; Hillsdale, MI; Williams, OH and 4 more areas |
| Headline | Severe Thunderstorm Warning issued June 10 at 8:34PM EDT until June 10 at 8:45PM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-10T20:45:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.33ca1616ad66735f2fb624c54ee8550ad32858af.002.1","noaa_urn:oid:2.49.0.1.840.0.8872da4352aab6ff9cd18b6c86093b3c6d87abb9.001.1","noaa_urn:oid:2.49.0.1.840.0.5dd347ec859eebf410813677f8aba535f6230ccd.002.1","noaa_urn:oid:2.49.0.1.840.0.1464ae561409e2ad2330383e12058d038f5c5f2d.001.1","noaa_urn:oid:2.49.0.1.840.0.e1687e210f157cbc2c225d3774840bb0b9fbd4f1.001.1","noaa_urn:oid:2.49.0.1.840.0.9dc0aeb0662178e3b7799bc481ce332990229226.001.1","noaa_urn:oid:2.49.0.1.840.0.811a9b92155a98477205de4221f5853f3d414898.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens near Holt?