This alert expired on 18 May 2026 at 18:45 UTC. It is kept here as a record.
No stronger detection stands among the 81 recorded within 20 km of this point since 15 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 18 at 2:09PM EDT until May 18 at 2:45PM EDT by NWS Gaylord MI
An estimated 15,218 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 30, 2026 · score 28 · 8.5 km
- July 2, 2026 · score 34 · 18.5 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 89 % 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) | 34 / 100 |
| Our confidence | 89% |
| Coordinates | 44.9503, -85.0702 |
| Nearest City | Traverse City (48 km) |
| Population Exposed | 15.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T18:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d03efe7edfbecd2d00cfd7b603486a35 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Antrim, MI; Kalkaska, MI; Antrim, MI; Charlevoix, MI; Otsego, MI |
| Headline | Severe Thunderstorm Warning issued May 18 at 2:09PM EDT until May 18 at 2:45PM EDT by NWS Gaylord MI |
| Expires | 2026-05-18T14:45:00-04:00 |
| SenderName | NWS Gaylord MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d03efe7edfbecd2d00cfd7b603486a3557887eaf.002.1","noaa_urn:oid:2.49.0.1.840.0.6d82c1de0123a0acd0bca4c4a3491071d4d5c802.001.1"] |
| Iem TypeSummary | R |
| Iem Magnitude | 1.18 |
| Iem Unit | Inch |
| Iem City | 1 N Clarion |
| Iem County | Emmet |
| Iem State | MI |
| Iem Wfo | APX |
| Iem Remark | Mesonet station EW3521 Harbor Springs. |
| MergedSources | [{"id":"iem_R_45.410_-84.670_1779120600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779120600000,"latitude":45.41,"longitude":-84.67},{"id":"iem_R_45.480_-84.930_1779120000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779120000000,"latitude":45.48,"longitude":-84.93},{"id":"iem_R_45.570_-84.800_1779119640000","source":"iem","severity":"low","severityValue":25,"timestamp":1779119640000,"latitude":45.57,"longitude":-84.8},{"id":"iem_R_45.300_-84.900_1779120000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779120000000,"latitude":45.3,"longitude":-84.9}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.