Right now
The most recent data we hold from NOAA arrived 23 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 1 August 2026 at 22:15 UTC. It is kept here as a record.
No stronger detection stands among the 60 recorded within 20 km of this point since 12 March 2026 — 13 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 1 at 6:05PM EDT until August 1 at 6:15PM EDT by NWS Columbia SC
Urban PEI: 214,909 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- September 6, 2026 · score 37 · 4.8 km
- August 10, 2026 · score 43 · 6.2 km
- March 12, 2026 · score 43 · 11.4 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 33.6600, -80.9100 |
| Nearest City | Columbia (39 km) |
| Urban exposure index (PEI) | 214.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-01T22:05:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.075c68b9a3377d3e63d783662d99262d03fb218f.002.1 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-08-01T22:05:00.000Z.
First archived: 2026-08-01T22:12:23.573Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Calhoun, SC; Orangeburg, SC |
| Headline | Severe Thunderstorm Warning issued August 1 at 6:05PM EDT until August 1 at 6:15PM EDT by NWS Columbia SC |
| Expires | 2026-08-01T18:15:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | 2 NE Owens Field |
| Iem County | Richland |
| Iem State | SC |
| Iem Wfo | CAE |
| Iem Remark | Columbia Fire responding to large flooded roadway at E Chapel Drive. |
| MergedSources | [{"id":"iem_F_33.990_-81.030_1785614940000","source":"iem","severity":"low","severityValue":25,"timestamp":1785614940000,"latitude":33.99,"longitude":-81.03},{"id":"iem_F_33.960_-80.980_1785618000000","source":"iem","severity":"low","severityValue":25,"timestamp":1785618000000,"latitude":33.96,"longitude":-80.98},{"id":"iem_F_33.990_-80.980_1785614280000","source":"iem","severity":"low","severityValue":25,"timestamp":1785614280000,"latitude":33.99,"longitude":-80.98}] |
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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