This alert expired on 9 May 2026 at 23:37 UTC. It is kept here as a record.
It is the 10th strongest of the 35 detections recorded within 20 km of this point since 16 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 May 9 at 7:27PM EDT until May 9 at 7:30PM EDT by NWS Buffalo NY
An estimated 334,202 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 21, 2026 · score 48 · 6.9 km
- July 21, 2026 · score 43 · 12.0 km
- September 2, 2026 · score 37 · 15.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 79 % 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) | 43 / 100 |
| Our confidence | 79% |
| Coordinates | 43.1879, -78.3614 |
| Nearest City | Batavia (25 km) |
| Population Exposed | 334.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-09T23:27:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.0298abefc9c64c46fc77ee876a654fff |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Upper Niagara River and Buffalo Harbor; Ripley to Dunkirk NY; Dunkirk to Buffalo NY; Ripley to Buffalo NY extending from 5NM off shoreline to US-Canadian border; Lower Niagara River; Niagara River to Hamlin Beach NY; Hamlin Beach to Sodus Bay NY; Niagara River to Hamlin Beach NY beyond 5NM off shoreline to US-Canadian border; Hamlin Beach to Sodus Bay NY beyond 5NM off shoreline to US-Canadian border; 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 May 9 at 7:27PM EDT until May 9 at 7:30PM EDT by NWS Buffalo NY |
| Expires | 2026-05-09T19:37:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0298abefc9c64c46fc77ee876a654fffdc241cfc.001.1","noaa_urn:oid:2.49.0.1.840.0.c5b71725a429e4272cb74df4dd5c3cadbca353a9.001.1","noaa_urn:oid:2.49.0.1.840.0.4480eeb0ea5b1eca0bab4da60c388f432f764c4d.001.1"] |
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 Batavia?
Calamity.live data shows a weather event with CalamityScore 43/100, near Batavia (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.