This alert expired on 13 August 2026 at 23:30 UTC. It is kept here as a record.
It is the 11th strongest of the 34 detections recorded within 20 km of this point since 12 June 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 13 at 6:30PM EDT until August 13 at 7:30PM EDT by NWS Charleston SC
Nearby, since 12 June 2026
- June 12, 2026 · score 22 · 14.1 km
- June 12, 2026 · score 34 · 19.2 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % 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) | 22 / 100 |
| Our confidence | 69% |
| Coordinates | 32.6700, -80.6100 |
| Nearest City | Hilton Head (52 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-13T22:30:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.96bd7ff3d7e99bb9d0df0c676a4fcc32526636b2.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Beaufort, SC; Charleston, SC; Colleton, SC |
| Headline | Severe Thunderstorm Warning issued August 13 at 6:30PM EDT until August 13 at 7:30PM EDT by NWS Charleston SC |
| Expires | 2026-08-13T19:30:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| Iem TypeSummary | I |
| Iem Magnitude | 116 |
| Iem Unit | F |
| Iem City | Bennetts Point |
| Iem County | Colleton |
| Iem State | SC |
| Iem Wfo | CHS |
| Iem Remark | Max Heat index of 116 reported at the Bennetts Point NERRS site. |
| MergedSources | [{"id":"iem_I_32.500_-80.990_1786639500000","source":"iem","severity":"low","severityValue":25,"timestamp":1786639500000,"latitude":32.5,"longitude":-80.99},{"id":"iem_I_32.680_-80.710_1786639740000","source":"iem","severity":"low","severityValue":25,"timestamp":1786639740000,"latitude":32.68,"longitude":-80.71},{"id":"iem_I_32.700_-80.010_1786644900000","source":"iem","severity":"low","severityValue":25,"timestamp":1786644900000,"latitude":32.7,"longitude":-80.01},{"id":"iem_I_32.770_-79.920_1786645800000","source":"iem","severity":"low","severityValue":25,"timestamp":1786645800000,"latitude":32.77,"longitude":-79.92},{"id":"iem_I_32.560_-80.460_1786646700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786646700000,"latitude":32.56,"longitude":-80.46}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.