Right now
The most recent data we hold from NOAA arrived 10 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 19:45 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 20 March 2026 — 5 others scored the same. 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 3:18PM EDT until May 18 at 3:45PM EDT by NWS Gaylord MI
Nearby, since 20 March 2026
- July 27, 2026 · score 22 · 20.4 km
How we know
9 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 | 45.0900, -84.1280 |
| Nearest City | Traverse City (123 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-18T19:18:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f7a7490a5df3e92692800755968f11b88c51a620.001.1 |
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: 2026-05-18T19:18:00.000Z.
First archived: 2026-05-18T19:19:45.014Z. 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 | Montmorency, MI |
| Headline | Severe Thunderstorm Warning issued May 18 at 3:18PM EDT until May 18 at 3:45PM EDT by NWS Gaylord MI |
| Expires | 2026-05-18T15:45:00-04:00 |
| SenderName | NWS Gaylord MI |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | Vanderbilt |
| Iem County | Otsego |
| Iem State | MI |
| Iem Wfo | APX |
| MergedSources | [{"id":"iem_G_45.020_-84.680_1779129780000","source":"iem","severity":"low","severityValue":25,"timestamp":1779129780000,"latitude":45.02,"longitude":-84.68},{"id":"iem_H_44.950_-84.620_1779129780000","source":"iem","severity":"low","severityValue":25,"timestamp":1779129780000,"latitude":44.95,"longitude":-84.62},{"id":"iem_R_45.410_-84.670_1779120600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779120600000,"latitude":45.41,"longitude":-84.67},{"id":"iem_H_44.910_-84.720_1779129360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779129360000,"latitude":44.91,"longitude":-84.72},{"id":"iem_H_45.030_-84.780_1779127920000","source":"iem","severity":"low","severityValue":25,"timestamp":1779127920000,"latitude":45.03,"longitude":-84.78},{"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},{"id":"iem_H_45.140_-84.660_1779128100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779128100000,"latitude":45.14,"longitude":-84.66}] |
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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