This alert expired on 4 July 2026 at 08:30 UTC. It is kept here as a record.
It is the 4th strongest of the 65 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 4 at 3:23AM EDT until July 4 at 4:30AM EDT by NWS Buffalo NY
An estimated 1,111,224 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 28, 2026 · score 52 · 1.4 km
- July 1, 2026 · score 52 · 2.8 km
- August 2, 2026 · score 76 · 3.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 80 % 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) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 43.1600, -78.9767 |
| Nearest City | Niagara Falls (10 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T07:23:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.629939a8b708bae406fc5b239903a3bf30ae74ac.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Upper Niagara River and Buffalo Harbor; 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 July 4 at 3:23AM EDT until July 4 at 4:30AM EDT by NWS Buffalo NY |
| Expires | 2026-07-04T04:30:00-04:00 |
| 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 Niagara Falls?
Calamity.live data shows a weather event with CalamityScore 52/100, near Niagara Falls (Canada), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.