This alert expired on 12 July 2026 at 21:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 42 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 11 July 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 12 at 4:26PM EDT until July 12 at 5:30PM EDT by NWS Columbia SC
An estimated 214,909 people live within 50 km of this point.
Nearby, since 12 March 2026
- August 5, 2026 · score 37 · 3.5 km
- May 23, 2026 · score 43 · 4.8 km
- March 13, 2026 · score 43 · 7.2 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 | 34.1411, -81.2811 |
| Nearest City | Seven Oaks (16 km) |
| Population Exposed | 214.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-12T20:26:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0d9a34e13778849fa94d4625a3de88e4 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chesterfield, SC; Kershaw, SC; Lee, SC; Lincoln, GA; Edgefield, SC; McCormick, SC |
| Headline | Severe Thunderstorm Warning issued July 12 at 4:26PM EDT until July 12 at 5:30PM EDT by NWS Columbia SC |
| Expires | 2026-07-12T17:30:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0d9a34e13778849fa94d4625a3de88e431964e55.001.1","noaa_urn:oid:2.49.0.1.840.0.147d3d6121d3d7253192160e3b6037141cba4483.001.1"] |
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 Seven Oaks (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.