This alert expired on 12 August 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 66 recorded within 20 km of this point since 27 June 2026 — 34 others scored the same. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 12 at 6:48PM EDT until August 12 at 7:00PM EDT by NWS Greenville-Spartanburg SC
An estimated 244,600 people live within 50 km of this point.
Nearby, since 27 June 2026
- June 29, 2026 · score 43 · 6.3 km
- August 29, 2026 · score 43 · 6.8 km
- August 28, 2026 · score 43 · 6.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 82 % 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) | 43 / 100 |
| Our confidence | 82% |
| Coordinates | 34.6992, -82.4000 |
| Nearest City | Mauldin (12 km) |
| Population Exposed | 244.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T22:48:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Greenville, SC |
| Headline | Severe Thunderstorm Warning issued August 12 at 6:48PM EDT until August 12 at 7:00PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-08-12T19:00:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 4 WSW Mauldin |
| Iem County | Greenville |
| Iem State | SC |
| Iem Wfo | GSP |
| Iem Remark | Tree and/or utility line damage leading to power outage. |
| MergedSources | [{"id":"iem_D_34.770_-82.380_1786568640000","source":"iem","severity":"low","severityValue":25,"timestamp":1786568640000,"latitude":34.77,"longitude":-82.38}] |
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 43/100, near Mauldin (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.