This alert expired on 5 August 2026 at 20:45 UTC. It is kept here as a record.
It is the 19th strongest of the 45 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 5 at 4:28PM EDT until August 5 at 4:45PM EDT by NWS Columbia SC
An estimated 214,909 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 12, 2026 · score 43 · 3.5 km
- July 6, 2026 · score 43 · 5.3 km
- March 13, 2026 · score 43 · 6.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 86% |
| Coordinates | 34.1529, -81.2457 |
| Nearest City | Seven Oaks (14 km) |
| Population Exposed | 214.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-05T20:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.57822a139128323d32ea52f17f52f3fea627a934.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fairfield, SC; Lexington, SC; Richland, SC |
| Headline | Severe Thunderstorm Warning issued August 5 at 4:28PM EDT until August 5 at 4:45PM EDT by NWS Columbia SC |
| Expires | 2026-08-05T16:45:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 43 |
| Iem Unit | MPH |
| Iem City | 1 S Lake Murray Dam |
| Iem County | Lexington |
| Iem State | SC |
| Iem Wfo | CAE |
| Iem Remark | Richland County Mesonet Reports a 43 mph wind gust at 4:10 pm at the Lake Murray Dam. |
| MergedSources | [{"id":"iem_G_34.040_-81.220_1785960600000","source":"iem","severity":"low","severityValue":25,"timestamp":1785960600000,"latitude":34.04,"longitude":-81.22}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 37/100, near Seven Oaks (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.