This alert expired on 11 July 2026 at 20:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 9 detections recorded within 20 km of this point since 5 July 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 July 11 at 4:12PM EDT until July 11 at 4:30PM EDT by NWS Columbia SC
Nearby, since 5 July 2026
- July 11, 2026 · score 43 · 18.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % 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 | 60% |
| Coordinates | 33.4357, -79.9512 |
| Nearest City | Summerville (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-11T20:12:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.40c6c97ee9e24ad62887a4dc5a37a555 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bamberg, SC; Calhoun, SC; Clarendon, SC; Orangeburg, SC; Brunswick, NC; Columbus, NC; Georgetown, SC; Horry, SC; Berkeley, SC; Dorchester, SC and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 11 at 4:12PM EDT until July 11 at 4:30PM EDT by NWS Columbia SC |
| Expires | 2026-07-11T16:30:00-04:00 |
| SenderName | NWS Columbia SC |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.40c6c97ee9e24ad62887a4dc5a37a555facc39f2.001.1","noaa_urn:oid:2.49.0.1.840.0.6f75004e604012cd5a96f93c58d6c1dcd758f649.001.1","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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.