Right now
The most recent data we hold from NOAA arrived 3 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 18 June 2026 at 22:30 UTC. It is kept here as a record.
It is the 5th strongest of the 27 detections recorded within 20 km of this point since 22 May 2026. 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: Severe Thunderstorm Warning issued June 18 at 6:19PM EDT until June 18 at 6:30PM EDT by NWS Columbia SC
Urban PEI: 64,806 within a heuristic 50 km radius; not unique people.
Nearby, since 22 May 2026
- July 12, 2026 · score 39 · 12.9 km
- June 18, 2026 · score 43 · 14.7 km
- June 1, 2026 · score 22 · 17.5 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 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) | 39 / 100 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 33.7534, -82.4490 |
| Nearest City | Evans (39 km) |
| Urban exposure index (PEI) | 64.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T22:19:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c087cf8d0470569d9d3cdfcb40e9d15f |
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: 2026-06-18T22:19:00.000Z.
First archived: 2026-06-18T22:25:35.761Z. 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 | Aiken, SC; Edgefield, SC; McCormick, SC; Saluda, SC; Banks, GA; Clarke, GA; Hall, GA; Jackson, GA; Madison, GA; White, GA; Madison, GA; Oglethorpe, GA; Taliaferro, GA; Wilkes, GA and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 18 at 6:19PM EDT until June 18 at 6:30PM EDT by NWS Columbia SC |
| Expires | 2026-06-18T18:30:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c087cf8d0470569d9d3cdfcb40e9d15f852a2966.002.1","noaa_urn:oid:2.49.0.1.840.0.f474c9fb843d3950810c02e44c896def31c64ad7.002.1","noaa_urn:oid:2.49.0.1.840.0.76977995f406cdc8e079cc22bccd35cdd9e9693e.002.1","noaa_urn:oid:2.49.0.1.840.0.dbe024f1de2a004e879c5a5df63fde2d9b38600b.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 E Aiken |
| Iem County | Aiken |
| Iem State | SC |
| Iem Wfo | CAE |
| Iem Remark | Aiken EM reported tree fell and downed power lines near the entrance to Citizens Park at Woodvale Ln. |
| MergedSources | [{"id":"iem_D_33.540_-81.700_1781810400000","source":"iem","severity":"low","severityValue":25,"timestamp":1781810400000,"latitude":33.54,"longitude":-81.7}] |
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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