This alert expired on 3 September 2026 at 03:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 64 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 16 July 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 2 at 10:23PM EDT until September 2 at 11:00PM EDT by NWS Grand Rapids MI
An estimated 282,735 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 16, 2026 · score 43 · 2.4 km
- July 3, 2026 · score 67 · 8.1 km
- July 15, 2026 · score 43 · 14.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 49 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 49 / 100 |
| Our confidence | 86% |
| Coordinates | 42.6700, -84.2163 |
| Nearest City | Haslett (17 km) |
| Population Exposed | 282.7K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-03T02:23:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.87d87e5793b601db47140aa20fd58c302a5829a3.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Ingham, MI |
| Headline | Severe Thunderstorm Warning issued September 2 at 10:23PM EDT until September 2 at 11:00PM EDT by NWS Grand Rapids MI |
| Expires | 2026-09-02T23:00:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 200 |
| Spc Location | Birch Run |
| Spc County | Saginaw |
| Spc State | MI |
| Spc Comments | Multiple spotter and public reports with images of hailstones up to 2 inches in diamater across Birch Run. (DTX) |
| MergedSources | [{"id":"spc_hail_43.25_-83.79_212","source":"spc","severity":"high","severityValue":65,"timestamp":1788402122689,"latitude":43.25,"longitude":-83.79}] |
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 Haslett?
Calamity.live data shows a weather event with CalamityScore 49/100, near Haslett (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.