This alert expired on 3 September 2026 at 14:30 UTC. It is kept here as a record.
It is the 41st strongest of the 121 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 9:35AM EDT until September 3 at 10:30AM EDT by NWS Grand Rapids MI
An estimated 249,602 people live within 50 km of this point.
Nearby, since 8 March 2026
- March 8, 2026 · score 22 · 3.2 km
- June 11, 2026 · score 37 · 3.9 km
- June 11, 2026 · score 37 · 4.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 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 | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 86% |
| Coordinates | 42.7229, -84.4657 |
| Nearest City | East Lansing (2 km) |
| Population Exposed | 249.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T13:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.9457f7c855cc8137d1784003a712afc679d222bc.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clinton, MI; Eaton, MI; Ingham, MI |
| Headline | Severe Thunderstorm Warning issued September 3 at 9:35AM EDT until September 3 at 10:30AM EDT by NWS Grand Rapids MI |
| Expires | 2026-09-03T10:30:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 1.21 |
| Iem Unit | Inch |
| Iem City | 3 NW White Lake |
| Iem County | Oakland |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Cocorahs station MI-OK-77 White Lake 0.5 E. The period of the Rain event was 24 hours. |
| MergedSources | [{"id":"iem_R_42.580_-83.850_1788433200000","source":"iem","severity":"low","severityValue":25,"timestamp":1788433200000,"latitude":42.58,"longitude":-83.85},{"id":"iem_H_42.380_-84.750_1788441120000","source":"iem","severity":"low","severityValue":25,"timestamp":1788441120000,"latitude":42.38,"longitude":-84.75},{"id":"iem_R_42.690_-83.550_1788430500000","source":"iem","severity":"low","severityValue":25,"timestamp":1788430500000,"latitude":42.69,"longitude":-83.55}] |
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 East Lansing?
Calamity.live data shows a weather event with CalamityScore 37/100, near East Lansing (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.