Right now
The most recent data we hold from NOAA arrived 7 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 18 May 2026 at 18:45 UTC. It is kept here as a record.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 18 at 2:12PM EDT until May 18 at 2:45PM EDT by NWS Gaylord MI
How we know
5 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 | 0.69/1 |
| Coordinates | 44.9684, -85.0277 |
| Nearest City | Traverse City (52 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-18T18:12:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1812215aa446631ca0fbda2a3a73d3c9 |
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: 2026-05-18T18:12:00.000Z.
First archived: 2026-05-18T18:18:06.013Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Charlevoix, MI; Otsego, MI; Antrim, MI; Kalkaska, MI |
| Headline | Severe Thunderstorm Warning issued May 18 at 2:12PM 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:2.49.0.1.840.0.1812215aa446631ca0fbda2a3a73d3c9f0626fb2.002.1","noaa_urn:oid:2.49.0.1.840.0.d03efe7edfbecd2d00cfd7b603486a3557887eaf.002.1"] |
| 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.
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