This alert expired on 18 May 2026 at 23:00 UTC. It is kept here as a record.
It is the 4th strongest of the 15 detections recorded within 20 km of this point since 18 May 2026. 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: Special Marine Warning issued May 18 at 5:32PM EDT until May 18 at 7:00PM EDT by NWS Cleveland OH
Nearby, since 18 May 2026
- June 11, 2026 · score 28 · 17.0 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 69% |
| Coordinates | 43.3080, -83.0299 |
| Nearest City | Burton (59 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-18T21:32:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.6a211a7d492e4ed53dc7457b0bc8e87a |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Maumee Bay to Reno Beach OH; Reno Beach to The Islands OH; Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM offshoreline to US-Canadian border; Reno Beach to The Islands OH beyond 5NM off shoreline to US-Canadian border; St. Clair River; Port Austin to Harbor Beach MI; Harbor Beach to Port Sanilac MI; Port Sanilac to Port Huron MI; Lake Huron from Port Austin to Harbor Beach 5NM Off Shore to the US/Canadian border; Lake Huron from Harbor Beach to Port Sanilac 5NM Off Shore to US/Canadian border; Lake Huron from Port Sanilac to Port Huron 5NM Off Shore to US/Canadian border; Detroit River; Lake St. Clair Open Lake (U.S. Portion); Michigan Waters of Lake Erie from Detroit River to North Cape MI and 2 more areas |
| Headline | Special Marine Warning issued May 18 at 5:32PM EDT until May 18 at 7:00PM EDT by NWS Cleveland OH |
| Expires | 2026-05-18T19:00:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6a211a7d492e4ed53dc7457b0bc8e87a0548812e.001.1","noaa_urn:oid:2.49.0.1.840.0.4e9315d6435fcbfd0aa25b81933a05101b60d712.001.1","noaa_urn:oid:2.49.0.1.840.0.0a4ae23467643d6ed9082c6ac049a0f56dea81d5.001.1","noaa_urn:oid:2.49.0.1.840.0.fa95505119af60681c8140b8d2955505010e4338.001.1","noaa_urn:oid:2.49.0.1.840.0.cdf52e5513a286eb3c7bda39aa07b9e6b6a48cba.001.1"] |
| Iem TypeSummary | D |
| Iem City | 1 NE Essexville |
| Iem County | Bay |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Report of 10 to 12 inch tree limbs down |
| MergedSources | [{"id":"iem_D_43.220_-83.430_1779137400000","source":"iem","severity":"low","severityValue":25,"timestamp":1779137400000,"latitude":43.22,"longitude":-83.43},{"id":"iem_D_43.430_-83.860_1779135480000","source":"iem","severity":"low","severityValue":25,"timestamp":1779135480000,"latitude":43.43,"longitude":-83.86},{"id":"iem_D_42.660_-83.170_1779132240000","source":"iem","severity":"low","severityValue":25,"timestamp":1779132240000,"latitude":42.66,"longitude":-83.17},{"id":"iem_D_43.620_-83.830_1779135960000","source":"iem","severity":"low","severityValue":25,"timestamp":1779135960000,"latitude":43.62,"longitude":-83.83}] |
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 10 February 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 Burton?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.