Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 18 May 2026 at 18:15 UTC. It is kept here as a record.
No stronger detection stands among the 94 recorded within 20 km of this point since 15 March 2026 — 18 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 18 at 1:31PM EDT until May 18 at 2:15PM EDT by NWS Gaylord MI
An estimated 15,218 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 16, 2026 · score 34 · 21.8 km
How we know
Confirmed by 3 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 | 44.8955, -85.5827 |
| Nearest City | Traverse City (15 km) |
| Population Exposed | 15.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T17:31:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.55cf952834a4907b87c9d132261428200d943640.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Grand Traverse Bay south of a line Grand Traverse Light to Norwood MI |
| Headline | Special Marine Warning issued May 18 at 1:31PM EDT until May 18 at 2:15PM EDT by NWS Gaylord MI |
| Expires | 2026-05-18T14:15:00-04:00 |
| SenderName | NWS Gaylord MI |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 1.1 |
| Iem Unit | Inch |
| Iem City | Charlevoix |
| Iem County | Charlevoix |
| Iem State | MI |
| Iem Wfo | APX |
| Iem Remark | CO-OP Observer station CHRM4 Charlevoix. |
| MergedSources | [{"id":"iem_R_44.730_-85.170_1779105600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779105600000,"latitude":44.73,"longitude":-85.17},{"id":"iem_R_45.320_-85.270_1779105600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779105600000,"latitude":45.32,"longitude":-85.27}] |
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 Traverse City?
Calamity.live data shows a weather event with CalamityScore 34/100, near Traverse City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.