This alert expired on 27 August 2026 at 18:30 UTC. It is kept here as a record.
It is the 4th strongest of the 88 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 8 August 2026.
What the source measured
NOAA reported: Special Marine Warning issued August 27 at 1:23PM EDT until August 27 at 2:30PM EDT by NWS Buffalo NY
An estimated 1,083,910 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 4, 2026 · score 52 · 2.7 km
- July 21, 2026 · score 46 · 3.7 km
- July 21, 2026 · score 52 · 5.1 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 | 43.0753, -78.9511 |
| Nearest City | Grand Island (5 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-27T17:23:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7b124ff711d3156feec511e3cfebe760141caad2.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Upper Niagara River and Buffalo Harbor; Lower Niagara River |
| Headline | Special Marine Warning issued August 27 at 1:23PM EDT until August 27 at 2:30PM EDT by NWS Buffalo NY |
| Expires | 2026-08-27T14:30:00-04:00 |
| 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 Grand Island?
Calamity.live data shows a weather event with CalamityScore 52/100, near Grand Island (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.