Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 29 May 2026 at 21:15 UTC. It is kept here as a record.
No stronger detection stands among the 59 recorded within 20 km of this point since 12 March 2026 — 20 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: Flood Warning issued May 29 at 5:11AM EDT until May 31 at 3:42AM EDT by NWS Columbia SC
An estimated 214,909 people live within 50 km of this point.
Nearby, since 12 March 2026
- May 29, 2026 · score 43 · 0.0 km
- September 6, 2026 · score 37 · 5.2 km
- July 11, 2026 · score 43 · 5.5 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.
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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 33.8100, -80.8780 |
| Nearest City | Columbia (25 km) |
| Population Exposed | 214.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-29T09:11:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2afa251db71cfe3c045a508f0ae0e5a33b1b16fd.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Calhoun, SC; Richland, SC |
| Headline | Flood Warning issued May 29 at 5:11AM EDT until May 31 at 3:42AM EDT by NWS Columbia SC |
| Expires | 2026-05-29T17:15:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 near Columbia?
Calamity.live data shows a weather event with CalamityScore 43/100, near Columbia (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.