This alert expired on 11 August 2026 at 21:45 UTC. It is kept here as a record.
It is the 4th strongest of the 22 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 4:40PM EDT until August 11 at 5:45PM EDT by NWS Charleston SC
Nearby, since 16 March 2026
- July 12, 2026 · score 22 · 6.5 km
- August 11, 2026 · score 22 · 7.5 km
- June 14, 2026 · score 43 · 21.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 65 % 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) | 22 / 100 |
| Our confidence | 65% |
| Coordinates | 32.6756, -81.1972 |
| Nearest City | Bluffton (58 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-11T20:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.90a3ba4ac606be8fe9b763ebc3b6e037 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Beaufort, SC; Jasper, SC; Burke, GA; Richmond, GA; Aiken, SC; Barnwell, SC |
| Headline | Severe Thunderstorm Warning issued August 11 at 4:40PM EDT until August 11 at 5:45PM EDT by NWS Charleston SC |
| Expires | 2026-08-11T17:45:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.90a3ba4ac606be8fe9b763ebc3b6e0379fea3dbf.001.1","noaa_urn:oid:2.49.0.1.840.0.2f3bbe2a5e01468bcf42c8225ff81ef1d543bccf.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 44 |
| Iem Unit | mph |
| Iem City | Savannah Airport |
| Iem County | Chatham |
| Iem State | GA |
| Iem Wfo | CHS |
| Iem Remark | Peak wind gust of 44 mph at the Savannah/Hilton Head International Airport (KSAV). |
| MergedSources | [{"id":"iem_G_32.130_-81.200_1786478700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786478700000,"latitude":32.13,"longitude":-81.2}] |
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.
Want to know when something happens near Bluffton?
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 188 scientific monitoring sources.