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 19 May 2026 at 22:00 UTC. It is kept here as a record.
It is the 10th strongest of the 74 detections recorded within 20 km of this point since 26 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 19 at 5:29PM EDT until May 19 at 6:00PM EDT by NWS Detroit/Pontiac MI
An estimated 662,890 people live within 50 km of this point.
Nearby, since 26 March 2026
- May 19, 2026 · score 48 · 0.0 km
- July 3, 2026 · score 52 · 9.0 km
- March 26, 2026 · score 43 · 10.7 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 90 % 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) | 48 / 100 |
| Our confidence | 90% |
| Coordinates | 41.8720, -83.3420 |
| Nearest City | Monroe (7 km) |
| Population Exposed | 662.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T21:29:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9fb3bf54742842549ff2fc5f7b99f27317cc719f.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Michigan Waters of Lake Erie from Detroit River to North Cape MI |
| Headline | Special Marine Warning issued May 19 at 5:29PM EDT until May 19 at 6:00PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-05-19T18:00:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | mph |
| Iem City | Monroe Custer Airport |
| Iem County | Monroe |
| Iem State | MI |
| Iem Wfo | DTX |
| MergedSources | [{"id":"iem_G_42.410_-83.010_1779223500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779223500000,"latitude":42.41,"longitude":-83.01},{"id":"iem_G_42.380_-83.370_1779222180000","source":"iem","severity":"low","severityValue":25,"timestamp":1779222180000,"latitude":42.38,"longitude":-83.37},{"id":"iem_M_42.430_-82.870_1779224340000","source":"iem","severity":"low","severityValue":25,"timestamp":1779224340000,"latitude":42.43,"longitude":-82.87},{"id":"iem_H_42.430_-83.180_1779221880000","source":"iem","severity":"low","severityValue":25,"timestamp":1779221880000,"latitude":42.43,"longitude":-83.18},{"id":"iem_G_41.940_-83.430_1779223680000","source":"iem","severity":"low","severityValue":25,"timestamp":1779223680000,"latitude":41.94,"longitude":-83.43}] |
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 Monroe?
Calamity.live data shows a weather event with CalamityScore 48/100, near Monroe (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.