This alert expired on 3 September 2026 at 22:45 UTC. It is kept here as a record.
No stronger detection stands among the 26 recorded within 20 km of this point since 17 March 2026 — 7 others 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 6:02PM EDT until September 3 at 6:45PM EDT by NWS Cleveland OH
An estimated 655,753 people live within 50 km of this point.
Nearby, since 17 March 2026
- September 3, 2026 · score 54 · 5.1 km
- August 11, 2026 · score 43 · 18.5 km
- August 10, 2026 · score 48 · 19.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 54 out of 100, at 91 % 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) | 54 / 100 |
| Our confidence | 91% |
| Coordinates | 40.8201, -81.5371 |
| Nearest City | Massillon (3 km) |
| Population Exposed | 655.8K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-03T22:02:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.8a1be34b9a72b828c493edeff6d31f01ea9595a9.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Erie, OH; Huron, OH; Lorain, OH; Crawford, OH; Hancock, OH; Huron, OH; Sandusky, OH; Seneca, OH; Wood, OH; Wyandot, OH; Columbiana, OH; Allegheny, PA; Beaver, PA; Washington, PA; Hancock, WV and 5 more areas |
| Headline | Severe Thunderstorm Warning issued September 3 at 6:02PM EDT until September 3 at 6:45PM EDT by NWS Cleveland OH |
| Expires | 2026-09-03T18:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8a1be34b9a72b828c493edeff6d31f01ea9595a9.001.1","noaa_urn:oid:2.49.0.1.840.0.e7677e71a6bd934f254865c4ddd4f6b59b872f36.001.1","noaa_urn:oid:2.49.0.1.840.0.e36fad9f4181fa9c36b50217bca1604f77c714a3.001.1","noaa_urn:oid:2.49.0.1.840.0.c376ffff2d75643f8d8873e3971a013d4cd36133.001.1","noaa_urn:oid:2.49.0.1.840.0.ed1478397c19c15a42efab7e75a787ff74fc624c.002.1","noaa_urn:oid:2.49.0.1.840.0.1e3c5b1f3b41590d64090c06453ceb7bb4b591ad.001.1","noaa_urn:oid:2.49.0.1.840.0.71ea9024531e6bcbd9da8e65b61ca1dc4367c743.002.1","noaa_urn:oid:2.49.0.1.840.0.941c09b148f90b3231fd847d5f53783306a0a345.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 175 |
| Spc Location | 1 N Lakemore |
| Spc County | Summit |
| Spc State | OH |
| Spc Comments | (CLE) |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 1 N Lakemore |
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 Massillon?
Calamity.live data shows a weather event with CalamityScore 54/100, near Massillon (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.