This alert expired on 1 August 2026 at 21:30 UTC. It is kept here as a record.
No stronger detection stands among the 6 recorded within 20 km of this point since 1 August 2026 — 2 others scored the same.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 1 at 4:42PM EDT until August 1 at 5:30PM EDT by NWS Columbia SC
An estimated 96,585 people live within 50 km of this point.
Nearby, since 1 August 2026
- August 11, 2026 · score 39 · 6.8 km
- August 2, 2026 · score 16 · 18.4 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 91 % 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) | 39 / 100 |
| Our confidence | 91% |
| Coordinates | 33.1954, -81.6023 |
| Nearest City | Aiken (42 km) |
| Population Exposed | 96.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-01T20:42:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.e6ac98ea836fe3d20021afdc49e7e90a22bf44c5.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Aiken, SC; Bamberg, SC; Barnwell, SC; Orangeburg, SC |
| Headline | Severe Thunderstorm Warning issued August 1 at 4:42PM EDT until August 1 at 5:30PM EDT by NWS Columbia SC |
| Expires | 2026-08-01T17:30:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | 2 E Martinez |
| Iem County | Richmond |
| Iem State | GA |
| Iem Wfo | CAE |
| Iem Remark | Public report of overflowing creek in Martinez. |
| MergedSources | [{"id":"iem_R_33.520_-82.080_1785613500000","source":"iem","severity":"low","severityValue":25,"timestamp":1785613500000,"latitude":33.52,"longitude":-82.08},{"id":"iem_F_33.510_-82.050_1785609180000","source":"iem","severity":"low","severityValue":25,"timestamp":1785609180000,"latitude":33.51,"longitude":-82.05}] |
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 39/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.