This alert expired on 2 August 2026 at 22:45 UTC. It is kept here as a record.
It is the 5th strongest of the 27 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 2 at 6:05PM EDT until August 2 at 6:45PM EDT by NWS Greenville-Spartanburg SC
An estimated 146,091 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 27, 2026 · score 32 · 13.8 km
- July 5, 2026 · score 43 · 14.1 km
- June 29, 2026 · score 46 · 20.2 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 81 % 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 | 81% |
| Coordinates | 34.8233, -81.2967 |
| Nearest City | Rock Hill (27 km) |
| Population Exposed | 146.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-02T22:05:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chester, SC; York, SC |
| Headline | Severe Thunderstorm Warning issued August 2 at 6:05PM EDT until August 2 at 6:45PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-08-02T18:45:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
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 Rock Hill (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.