This alert expired on 11 July 2026 at 21:30 UTC. It is kept here as a record.
It is the strongest of the 26 detections recorded within 20 km of this point since 25 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 July 11 at 4:33PM EDT until July 11 at 5:30PM EDT by NWS Charleston SC
An estimated 215,782 people live within 50 km of this point.
Nearby, since 25 March 2026
- July 11, 2026 · score 22 · 18.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % 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 | 80% |
| Coordinates | 33.2723, -79.9556 |
| Nearest City | Goose Creek (33 km) |
| Population Exposed | 215.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-11T20:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.21e5b4d7890ff0c43cc3957db77e65be |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Charleston, SC; Berkeley, SC; Dorchester, SC; Clarendon, SC; Orangeburg, SC |
| Headline | Severe Thunderstorm Warning issued July 11 at 4:33PM EDT until July 11 at 5:30PM EDT by NWS Charleston SC |
| Expires | 2026-07-11T17:30:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.21e5b4d7890ff0c43cc3957db77e65be5a188341.001.1","noaa_urn:oid:2.49.0.1.840.0.4afe598fed9c531e3aa814f628c47ff69389b415.001.1","noaa_urn:oid:2.49.0.1.840.0.fdbafbb7482eab7c3a54e518534447d210deab86.001.1"] |
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 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.