This alert expired on 18 July 2026 at 22:30 UTC. It is kept here as a record.
No stronger detection stands among the 9 recorded within 20 km of this point since 16 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 18 at 5:51PM EDT until July 18 at 6:30PM EDT by NWS Greenville-Spartanburg SC
An estimated 36,211 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 5, 2026 · score 22 · 19.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 79 % 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) | 34 / 100 |
| Our confidence | 79% |
| Coordinates | 34.9660, -83.0720 |
| Nearest City | Clemson (38 km) |
| Population Exposed | 36.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T21:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9f613498e69e0bc7ff122017e849cae5bf55481d.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Oconee, SC |
| Headline | Severe Thunderstorm Warning issued July 18 at 5:51PM EDT until July 18 at 6:30PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-07-18T18:30:00-04:00 |
| 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 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.