Right now
The most recent data we hold from NOAA arrived 14 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
18 other detections within 20 km in the last 24 hours, the nearest 17 km from here.
This alert expired on 20 July 2026 at 20:45 UTC. It is kept here as a record.
No stronger detection stands among the 42 recorded within 20 km of this point since 5 July 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 20 at 4:23PM EDT until July 20 at 4:45PM EDT by NWS Columbia SC
An estimated 40,816 people live within 50 km of this point.
Nearby, since 5 July 2026
- July 11, 2026 · score 34 · 5.9 km
- August 27, 2026 · score 34 · 16.0 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 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 33.5411, -80.2756 |
| Nearest City | Sumter (43 km) |
| Population Exposed | 40.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-20T20:23:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4bf9ee26a16fc56bc9e9ded964375da446447cd4.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clarendon, SC |
| Headline | Severe Thunderstorm Warning issued July 20 at 4:23PM EDT until July 20 at 4:45PM EDT by NWS Columbia SC |
| Expires | 2026-07-20T16:45:00-04:00 |
| SenderName | NWS Columbia 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 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 in this area?
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 185 scientific monitoring sources.