This alert expired on 11 August 2026 at 21:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 66 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 4:56PM EDT until August 11 at 5:15PM EDT by NWS Greenville-Spartanburg SC
An estimated 169,686 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 13, 2026 · score 43 · 10.7 km
- July 28, 2026 · score 37 · 12.4 km
- August 28, 2026 · score 39 · 14.1 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 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 35.5015, -81.5325 |
| Nearest City | Shelby (24 km) |
| Population Exposed | 169.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T20:56:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | McDowell, NC; Davidson, NC; Rabun, GA; Oconee, SC and 1 more areas |
| Headline | Severe Thunderstorm Warning issued August 11 at 4:56PM EDT until August 11 at 5:15PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-08-11T17:15:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1da1753e63b90fac3a384ffcdc7ba507d1459d71.001.1","noaa_urn:oid:2.49.0.1.840.0.8bcbd8d912b7e8864c74b6d11f6f1af4e70dbe82.001.1","noaa_urn:oid:2.49.0.1.840.0.b7c82477bb7b5dd32362793bae1329565c11b409.001.1","noaa_urn:oid:2.49.0.1.840.0.af39a6d487ef484adbc505616d86d9b3079df068.001.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 43/100, near Shelby (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.