This alert expired on 16 July 2026 at 01:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 54 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day. 19 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 15 at 7:50PM EDT until July 15 at 9:15PM EDT by NWS Grand Rapids MI
An estimated 249,602 people live within 50 km of this point.
Nearby, since 8 March 2026
- July 16, 2026 · score 43 · 14.9 km
- June 11, 2026 · score 37 · 15.2 km
- June 11, 2026 · score 37 · 15.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 42.7971, -84.2494 |
| Nearest City | Haslett (13 km) |
| Population Exposed | 249.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-15T23:50:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6362031e3b416c2214977c5891adbf62 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Ingham, MI; Shiawassee, MI |
| Headline | Severe Thunderstorm Warning issued July 15 at 7:50PM EDT until July 15 at 9:15PM EDT by NWS Grand Rapids MI |
| Expires | 2026-07-15T21:15:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6362031e3b416c2214977c5891adbf622edb6b7c.001.1","noaa_urn:oid:2.49.0.1.840.0.63bb0bb4c3a2b4a16d181704dd4c2708e9859901.001.1"] |
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 10 February 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 43/100, near Haslett (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.