This alert expired on 3 September 2026 at 04:45 UTC. It is kept here as a record.
No stronger detection stands among the 55 recorded within 20 km of this point since 16 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 12:35AM EDT until September 3 at 12:45AM EDT by NWS Cleveland OH
An estimated 117,846 people live within 50 km of this point.
Nearby, since 16 March 2026
- September 3, 2026 · score 49 · 0.0 km
- June 26, 2026 · score 43 · 2.9 km
- July 18, 2026 · score 43 · 17.7 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 49 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) | 49 / 100 |
| Our confidence | 92% |
| Coordinates | 41.9900, -80.2362 |
| Nearest City | Erie (20 km) |
| Population Exposed | 117.8K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-03T04:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.78e8fbacb2854b01612396d54b5a5b6a545d8ce8.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Erie, PA |
| Headline | Severe Thunderstorm Warning issued September 3 at 12:35AM EDT until September 3 at 12:45AM EDT by NWS Cleveland OH |
| Expires | 2026-09-03T00:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| 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 | 2 SSE North East |
| Iem County | Erie |
| Iem State | PA |
| Iem Wfo | CLE |
| Iem Remark | Flooding reported at mile marker 41 on I-90 eastbound. |
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 Erie?
Calamity.live data shows a weather event with CalamityScore 49/100, near Erie (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.