This alert expired on 17 June 2026 at 05:00 UTC. It is kept here as a record.
It is the 38th strongest of the 101 detections recorded within 20 km of this point since 9 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 17 at 12:21AM EDT until June 17 at 1:00AM EDT by NWS Buffalo NY
An estimated 1,083,910 people live within 50 km of this point.
Nearby, since 9 March 2026
- July 21, 2026 · score 52 · 4.5 km
- August 27, 2026 · score 52 · 6.2 km
- July 4, 2026 · score 52 · 6.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 81 % 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) | 46 / 100 |
| Our confidence | 81% |
| Coordinates | 43.0548, -78.8795 |
| Nearest City | North Tonawanda (2 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-17T04:21:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.21c97722688332f21a55a9a163adfe128dc084b5.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Upper Niagara River and Buffalo Harbor; Dunkirk to Buffalo NY; Lower Niagara River; Niagara River to Hamlin Beach NY; Niagara River to Hamlin Beach NY beyond 5NM off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued June 17 at 12:21AM EDT until June 17 at 1:00AM EDT by NWS Buffalo NY |
| Expires | 2026-06-17T01:00:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
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 North Tonawanda?
Calamity.live data shows a weather event with CalamityScore 46/100, near North Tonawanda (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.