Right now
The most recent data we hold from NOAA arrived 9 minutes 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 00:15 UTC. It is kept here as a record.
It is the 16th strongest of the 42 detections recorded within 20 km of this point since 4 April 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 10 at 7:44PM EDT until June 10 at 8:15PM EDT by NWS Grand Rapids MI
An estimated 2,184,257 people live within 50 km of this point.
Nearby, since 4 April 2026
- June 10, 2026 · score 46 · 4.2 km
- June 14, 2026 · score 52 · 11.1 km
- September 3, 2026 · score 76 · 12.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 79 % 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) | 46 / 100 |
| Our confidence | 79% |
| Coordinates | 42.0338, -83.4240 |
| Nearest City | Monroe (13 km) |
| Population Exposed | 2.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-10T23:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.845e7f88c532ce98a34ee76962d32912 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Calhoun, MI; Eaton, MI; Ionia, MI; Mecosta, MI; Montcalm, MI; Osceola, MI; Clinton, MI; Gratiot, MI; Ingham, MI; Isabella, MI; Jackson, MI and 6 more areas |
| Headline | Severe Thunderstorm Warning issued June 10 at 7:44PM EDT until June 10 at 8:15PM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-10T20:15:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.845e7f88c532ce98a34ee76962d32912b64bb245.001.1","noaa_urn:oid:2.49.0.1.840.0.02d75652986e74e9df1e1a0d9c48af17d46c45d1.001.1","noaa_urn:oid:2.49.0.1.840.0.05988293dc67d40bf38b189a34b4e5839679f8a6.001.1","noaa_urn:oid:2.49.0.1.840.0.739903efad71f8d4663501745a1ffd5952aee7a2.001.1","noaa_urn:oid:2.49.0.1.840.0.ff5814f2a090ea13100d311ef93057c415e6693b.002.1","noaa_urn:oid:2.49.0.1.840.0.e00d9c9a9eb08993169ad785fac6be4a350cd7b5.002.1","noaa_urn:oid:2.49.0.1.840.0.74a3a8dc658835c38b1aaaf0de4a4cfb2dd5c3d1.001.1","noaa_urn:oid:2.49.0.1.840.0.b61ae590cc14a252310d516aca790b40795ebf47.001.1","noaa_urn:oid:2.49.0.1.840.0.13f26e154b5af7d535b175547037910067b9eb7f.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.
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