This alert expired on 3 September 2026 at 03:30 UTC. It is kept here as a record.
It is the 9th strongest of the 32 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 2 September 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 2 at 10:29PM EDT until September 2 at 11:30PM EDT by NWS Cleveland OH
An estimated 30,075 people live within 50 km of this point.
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 86 % 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 | Medium |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 86% |
| Coordinates | 42.0737, -79.2972 |
| Nearest City | Jamestown (6 km) |
| Population Exposed | 30.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T02:29:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ddf02a59825f6b21a98fb027588dcf42a029d8a8.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Crawford, PA; Erie, PA; Erie, PA; Allegany, NY and 1 more areas |
| Headline | Severe Thunderstorm Warning issued September 2 at 10:29PM EDT until September 2 at 11:30PM EDT by NWS Cleveland OH |
| Expires | 2026-09-02T23:30:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ddf02a59825f6b21a98fb027588dcf42a029d8a8.001.1","noaa_urn:oid:2.49.0.1.840.0.1da77ce21b6583ef3a0fe755ba5ace171f1c682a.001.1","noaa_urn:oid:2.49.0.1.840.0.7700b446caf3e1408cbc931e70244915214e7734.001.1","noaa_urn:oid:2.49.0.1.840.0.f7608fb7b46f90f05f1b870cdd0483f1d4e81b2c.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | Springville |
| Spc County | Erie |
| Spc State | NY |
| Spc Comments | Tree down. Time estimated by radar. (BUF) |
| MergedSources | [{"id":"spc_wind_41.87_-79.15_1","source":"spc","severity":"medium","severityValue":45,"timestamp":1788402842659,"latitude":41.87,"longitude":-79.15},{"id":"spc_wind_41.87_-79.19_2","source":"spc","severity":"medium","severityValue":45,"timestamp":1788402842659,"latitude":41.87,"longitude":-79.19},{"id":"spc_wind_41.61_-79.42_6","source":"spc","severity":"medium","severityValue":45,"timestamp":1788402842659,"latitude":41.61,"longitude":-79.42},{"id":"spc_wind_41.69_-79.56_9","source":"spc","severity":"medium","severityValue":45,"timestamp":1788402842659,"latitude":41.69,"longitude":-79.56},{"id":"spc_wind_41.87_-79.19_11","source":"spc","severity":"medium","severityValue":45,"timestamp":1788402842659,"latitude":41.87,"longitude":-79.19},{"id":"spc_wind_41.50_-79.69_143","source":"spc","severity":"medium","severityValue":45,"timestamp":1788402842660,"latitude":41.5,"longitude":-79.69},{"id":"spc_wind_41.43_-79.55_150","source":"spc","severity":"medium","severityValue":45,"timestamp":1788402842660,"latitude":41.43,"longitude":-79.55},{"id":"spc_wind_42.51_-78.67_188","source":"spc","severity":"medium","severityValue":45,"timestamp":1788402842660,"latitude":42.51,"longitude":-78.67}] |
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 Jamestown?
Calamity.live data shows a weather event with CalamityScore 28/100, near Jamestown (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.