Right now
The most recent data we hold from NOAA arrived 1 minute 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 17:15 UTC. It is kept here as a record.
No stronger detection stands among the 32 recorded within 20 km of this point since 16 March 2026 — 10 others scored the same. The last comparable one was on 17 May 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 18 at 12:22PM EDT until May 18 at 1:15PM EDT by NWS Gaylord MI
Nearby, since 16 March 2026
- September 2, 2026 · score 16 · 10.9 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 44.4750, -86.4108 |
| Nearest City | Traverse City (70 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-18T16:22:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.bd1635aa39ddc4246b5e2b74aa6f4301a03d063c.001.1 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-05-18T16:22:00.000Z.
First archived: 2026-05-18T17:11:29.915Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Manistee to Point Betsie MI; Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued May 18 at 12:22PM EDT until May 18 at 1:15PM EDT by NWS Gaylord MI |
| Expires | 2026-05-18T13:15:00-04:00 |
| SenderName | NWS Gaylord MI |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 1.06 |
| Iem Unit | Inch |
| Iem City | 5 S Benzonia |
| Iem County | Benzie |
| Iem State | MI |
| Iem Wfo | APX |
| Iem Remark | Cocorahs station MI-BZ-1 Benzonia 5.3 S. |
| MergedSources | [{"id":"iem_R_44.530_-86.130_1779105600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779105600000,"latitude":44.53,"longitude":-86.13},{"id":"iem_R_44.540_-86.110_1779109200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779109200000,"latitude":44.54,"longitude":-86.11}] |
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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