Right now
The most recent data we hold from NOAA arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 19 km from here.
This alert expired on 11 September 2026 at 22:30 UTC. It is kept here as a record.
It is the 39th strongest of the 49 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 6 September 2026. 27 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 11 at 5:44PM EDT until September 11 at 6:30PM EDT by NWS Columbia SC
An estimated 40,816 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 17, 2026 · score 43 · 13.8 km
- September 11, 2026 · score 37 · 18.9 km
- June 18, 2026 · score 22 · 21.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 79% |
| Coordinates | 34.3147, -80.5732 |
| Nearest City | Sumter (49 km) |
| Population Exposed | 40.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-11T21:44:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ccbefe2c5c42e762e2588d5b8cd69d3594b014eb.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fairfield, SC; Kershaw, SC; Richland, SC; Sumter, SC; Chesterfield, SC; Kershaw, SC; Lee, SC |
| Headline | Severe Thunderstorm Warning issued September 11 at 5:44PM EDT until September 11 at 6:30PM EDT by NWS Columbia SC |
| Expires | 2026-09-11T18:30:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ccbefe2c5c42e762e2588d5b8cd69d3594b014eb.001.1","noaa_urn:oid:2.49.0.1.840.0.6214b84ef60ea6b6d35a05225f19430f063db0fd.002.1"] |
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 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.
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