This alert expired on 18 May 2026 at 19:15 UTC. It is kept here as a record.
It is the 7th strongest of the 36 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 18 at 3:03PM EDT until May 18 at 3:15PM EDT by NWS Northern Indiana
Nearby, since 12 March 2026
- September 5, 2026 · score 16 · 3.0 km
- March 16, 2026 · score 22 · 7.0 km
- March 15, 2026 · score 22 · 7.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % 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) | 22 / 100 |
| Our confidence | 69% |
| Coordinates | 41.8404, -84.9931 |
| Nearest City | Battle Creek (56 km) |
| Impact Tier | minor |
| Date | 2026-05-18 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.01243140bb4cb236500d3e357da68b2b |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Noble, IN; Barry, MI; Calhoun, MI; Kent, MI; Delaware, IN; Hamilton, IN; Hancock, IN; Madison, IN; Marion, IN and 5 more areas |
| Headline | Severe Thunderstorm Warning issued May 18 at 3:03PM EDT until May 18 at 3:15PM EDT by NWS Northern Indiana |
| Expires | 2026-05-18T15:15:00-04:00 |
| SenderName | NWS Northern Indiana |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.01243140bb4cb236500d3e357da68b2b534e0913.002.1","noaa_urn:oid:2.49.0.1.840.0.792322f3476ab8f5ce97bac6e7afa995eee3ada6.001.1","noaa_urn:oid:2.49.0.1.840.0.d9e354de4bbadb07a5681a1bcebf50d42e650686.001.1","noaa_urn:oid:2.49.0.1.840.0.106aae861a0a97df17f9a259494bc954183cb05f.001.1","noaa_urn:oid:2.49.0.1.840.0.4bfe7b0715117e485bc9a0496754f2bc535ff174.001.1","noaa_urn:oid:2.49.0.1.840.0.8a5a655881633cdd6ba048ce5bb96c8a6305a436.002.1","noaa_urn:oid:2.49.0.1.840.0.4a9d626a3a4bb565000d6284685ca04208e1236b.001.1","noaa_urn:oid:2.49.0.1.840.0.38761da7832ef64e3a8901fba69260f6b4a44c01.001.1"] |
| Iem TypeSummary | D |
| Iem City | 4 NE Constantine |
| Iem County | St. Joseph |
| Iem State | MI |
| Iem Wfo | IWX |
| Iem Remark | Emergency Manager reports powerlines and power pole down near Freese Road and Roys Road to the northeast of Constantine in St. Joseph County in Michigan. Time estimated from radar. |
| MergedSources | [{"id":"iem_G_42.230_-85.550_1779128400000","source":"iem","severity":"low","severityValue":25,"timestamp":1779128400000,"latitude":42.23,"longitude":-85.55},{"id":"iem_D_41.880_-85.620_1779125700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779125700000,"latitude":41.88,"longitude":-85.62}] |
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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Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.