This alert expired on 18 June 2026 at 17:00 UTC. It is kept here as a record.
It is the 10th strongest of the 24 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 18 at 12:41PM EDT until June 18 at 1:00PM EDT by NWS Buffalo NY
An estimated 44,567 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 30, 2026 · score 43 · 8.5 km
- May 13, 2026 · score 58 · 10.1 km
- June 14, 2026 · score 43 · 11.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 84 % 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) | 34 / 100 |
| Our confidence | 84% |
| Coordinates | 43.6807, -76.2633 |
| Nearest City | Oswego (32 km) |
| Population Exposed | 44.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T16:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.fcdd0d7f90eacf27bf548080e3c0046f4188cb50.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Sodus Bay to Mexico Bay NY; Mexico Bay NY to the St. Lawrence River; Sodus Bay to Mexico Bay NY beyond 5NM off shoreline to US-Canadian border; Mexico Bay NY to the St. Lawrence River beyond 5NM off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued June 18 at 12:41PM EDT until June 18 at 1:00PM EDT by NWS Buffalo NY |
| Expires | 2026-06-18T13:00:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 3 NNE South Butler |
| Iem County | Wayne |
| Iem State | NY |
| Iem Wfo | BUF |
| Iem Remark | A couple of trees down on property. |
| MergedSources | [{"id":"iem_D_43.160_-76.740_1781791980000","source":"iem","severity":"low","severityValue":25,"timestamp":1781791980000,"latitude":43.16,"longitude":-76.74}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.