This alert expired on 18 July 2026 at 18:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 40 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 9 July 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 18 at 1:06PM EDT until July 18 at 2:00PM EDT by NWS Buffalo NY
An estimated 1,002,928 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 2, 2026 · score 46 · 10.3 km
- August 2, 2026 · score 58 · 10.7 km
- July 9, 2026 · score 52 · 15.0 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 | 43.3200, -78.9064 |
| Nearest City | Niagara-on-the-Lake (16 km) |
| Population Exposed | 1.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T17:06:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.64966e2941b3a719b95e866fcbfdde32c58b5719.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 18 at 1:06PM EDT until July 18 at 2:00PM EDT by NWS Buffalo NY |
| Expires | 2026-07-18T14:00:00-04:00 |
| 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 Niagara-on-the-Lake?
Calamity.live data shows a weather event with CalamityScore 52/100, near Niagara-on-the-Lake (Canada), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.