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 June 2026 at 21:30 UTC. It is kept here as a record.
It is the 9th strongest of the 35 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 29 at 5:20PM EDT until June 29 at 5:30PM EDT by NWS Columbia SC
Urban PEI: 23,260 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- May 23, 2026 · score 34 · 4.3 km
- July 10, 2026 · score 34 · 10.5 km
- June 30, 2026 · score 39 · 16.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 33.9858, -82.4849 |
| Nearest City | Greenwood (38 km) |
| Urban exposure index (PEI) | 23.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-29T21:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.5697c677c6fe1c24830fba5502addcbe |
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: 2026-06-29T21:20:00.000Z.
First archived: 2026-06-29T21:21:50.878Z. 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 | McDuffie, GA; Spartanburg, SC; Greenwood, SC; Laurens, SC and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 29 at 5:20PM EDT until June 29 at 5:30PM EDT by NWS Columbia SC |
| Expires | 2026-06-29T17:30:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5697c677c6fe1c24830fba5502addcbefce499a4.001.1","noaa_urn:oid:2.49.0.1.840.0.81c0ecf5911622e9985ab365ce47799c136b9881.001.1","noaa_urn:oid:2.49.0.1.840.0.3e2de9c95ec62eb47cef671d096416b5fc128ac7.001.1","noaa_urn:oid:2.49.0.1.840.0.9d179289f50d2cc52a95d7f261a32693f66100ed.001.1","noaa_urn:oid:2.49.0.1.840.0.1eeba0d7790a03b03a60be32b4a657367a4f140e.001.1","noaa_urn:oid:2.49.0.1.840.0.ebabb0aaea399774a5b85f408c2f92e555980c03.001.1"] |
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 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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