Right now
The most recent data we hold from NOAA arrived 1 minute 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 23 May 2026 at 22:00 UTC. It is kept here as a record.
It is the 96th strongest of the 397 detections recorded within 20 km of this point since 12 March 2026. 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 May 23 at 5:44PM EDT until May 23 at 6:00PM EDT by NWS Columbia SC
An estimated 214,909 people live within 50 km of this point.
Nearby, since 12 March 2026
- May 23, 2026 · score 43 · 0.0 km
- July 12, 2026 · score 43 · 4.8 km
- March 13, 2026 · score 43 · 7.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 84 % 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 | 84% |
| Coordinates | 34.1015, -81.3008 |
| Nearest City | Lexington (15 km) |
| Population Exposed | 214.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-23T21:44:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a8f1ef0f83c6b57d1d7966592f3789682b4ad520.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lexington, SC; Richland, SC |
| Headline | Severe Thunderstorm Warning issued May 23 at 5:44PM EDT until May 23 at 6:00PM EDT by NWS Columbia SC |
| Expires | 2026-05-23T18:00:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 7 ENE Saluda |
| Iem County | Saluda |
| Iem State | SC |
| Iem Wfo | CAE |
| Iem Remark | Public report of golf ball size hail Highway 378. |
| MergedSources | [{"id":"iem_H_34.030_-81.660_1779569100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779569100000,"latitude":34.03,"longitude":-81.66}] |
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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