This alert expired on 18 June 2026 at 20:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 18 detections recorded within 20 km of this point since 12 March 2026. 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 June 18 at 3:46PM EDT until June 18 at 4:15PM EDT by NWS Columbia SC
Nearby, since 12 March 2026
- July 28, 2026 · score 22 · 8.3 km
- August 2, 2026 · score 22 · 13.2 km
- August 2, 2026 · score 22 · 15.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 58 % 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) | 22 / 100 |
| Our confidence | 58% |
| Coordinates | 33.3442, -80.8979 |
| Nearest City | West Columbia (74 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-18T19:46:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Aiken, SC; Lexington, SC; Colleton, SC |
| Headline | Severe Thunderstorm Warning issued June 18 at 3:46PM EDT until June 18 at 4:15PM EDT by NWS Columbia SC |
| Expires | 2026-06-18T16:15:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.091f7dbc40d0649848f348a752e7fc786889ccc6.001.1","noaa_urn:oid:2.49.0.1.840.0.4504ecb940a48c5a8808dea74abf4b22404958ce.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 22/100, near West Columbia (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.