This alert expired on 3 September 2026 at 03:45 UTC. It is kept here as a record.
No stronger detection stands among the 60 recorded within 20 km of this point since 16 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Special Marine Warning issued September 2 at 10:13PM EDT until September 2 at 11:45PM EDT by NWS Cleveland OH
An estimated 99,475 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 10, 2026 · score 43 · 11.2 km
- June 11, 2026 · score 37 · 15.6 km
- June 26, 2026 · score 43 · 17.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 45 out of 100, at 92 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 45 / 100 |
| Our confidence | 92% |
| Coordinates | 42.3241, -79.8263 |
| Nearest City | Erie (31 km) |
| Population Exposed | 99.5K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-03T02:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.dca8294a8a7d8acd673c8b09d339feed95b0c651.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Geneva-on-the-Lake to Conneaut OH; Conneaut OH to Ripley NY; Geneva-on-the-Lake to Conneaut OH beyond 5 nm off shoreline to US-Canadian border; Conneaut OH to Ripley NY beyond 5 nm off shoreline to US-Canadian border; Ripley to Dunkirk NY; Dunkirk to Buffalo NY; Ripley to Buffalo NY extending from 5NM off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued September 2 at 10:13PM EDT until September 2 at 11:45PM EDT by NWS Cleveland OH |
| Expires | 2026-09-02T23:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.dca8294a8a7d8acd673c8b09d339feed95b0c651.001.1","noaa_urn:oid:2.49.0.1.840.0.bef54477ec683e737758c0c449e6bfdede1d1cd6.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 1 SE Harborcreek |
| Spc County | Erie |
| Spc State | PA |
| Spc Comments | (CLE) |
| Iem TypeSummary | E |
| Iem City | 1 SW Erie |
| Iem County | Erie |
| Iem State | PA |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 45/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.