This alert expired on 3 September 2026 at 19:00 UTC. It is kept here as a record.
It is the 12th strongest of the 37 detections recorded within 20 km of this point since 4 April 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 2:51PM EDT until September 3 at 3:00PM EDT by NWS Grand Rapids MI
An estimated 222,055 people live within 50 km of this point.
Nearby, since 4 April 2026
- May 18, 2026 · score 43 · 12.9 km
- September 3, 2026 · score 37 · 13.2 km
- July 15, 2026 · score 48 · 19.2 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 91 % 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 | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 91% |
| Coordinates | 42.9190, -83.8448 |
| Nearest City | Flint (16 km) |
| Population Exposed | 222.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T18:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.3755327cda597a8065d56edd83fcc7c6daa7b950.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clinton, MI; Shiawassee, MI; Tuscola, MI and 6 more areas |
| Headline | Severe Thunderstorm Warning issued September 3 at 2:51PM EDT until September 3 at 3:00PM EDT by NWS Grand Rapids MI |
| Expires | 2026-09-03T15:00:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3755327cda597a8065d56edd83fcc7c6daa7b950.001.1","noaa_urn:oid:2.49.0.1.840.0.ca661f78c2a6321442c76225a33375cf5bc974d6.001.1","noaa_urn:oid:2.49.0.1.840.0.415ba6fa1948759a06d3d835cdcd5b1194f0d04b.002.1","noaa_urn:oid:2.49.0.1.840.0.74c381d028ba7f68a7265633d9ccd64efc412c36.001.1","noaa_urn:oid:2.49.0.1.840.0.34be17399ec8fb6062ed4d8470cd63b984969d5b.001.1","noaa_urn:oid:2.49.0.1.840.0.3056d3de73031968791208286d0f7d88cdf30c63.001.1","noaa_urn:oid:2.49.0.1.840.0.4c661e6d32c456f8cd73cc9339387d954ac2479a.002.1","noaa_urn:oid:2.49.0.1.840.0.ea4b33291a6f8c7f9423d92ba7bc9e7cbe2056d6.001.1","noaa_urn:oid:2.49.0.1.840.0.4c32348012dd322b024002060f77818c2a73e95a.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 66 |
| Spc Location | 3 NNE Edgemont Park |
| Spc County | Clinton |
| Spc State | MI |
| Spc Comments | ASOS station KLAN Lansing. (GRR) |
| Iem TypeSummary | D |
| Iem City | 3 W Lake Orion |
| Iem County | Oakland |
| Iem State | MI |
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 Flint?
Calamity.live data shows a weather event with CalamityScore 37/100, near Flint (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.