This alert expired on 18 June 2026 at 22:30 UTC. It is kept here as a record.
No stronger detection stands among the 59 recorded within 20 km of this point since 12 March 2026 — 28 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 18 at 5:41PM EDT until June 18 at 6:30PM EDT by NWS Charleston SC
An estimated 161,391 people live within 50 km of this point.
Nearby, since 12 March 2026
- May 23, 2026 · score 43 · 2.3 km
- May 26, 2026 · score 43 · 3.4 km
- March 13, 2026 · score 43 · 5.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 84 % 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 | 84% |
| Coordinates | 33.4014, -82.0581 |
| Nearest City | Augusta (11 km) |
| Population Exposed | 161.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T21:41:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Colleton, SC; Dorchester, SC; Beaufort, SC; Charleston, SC; Colleton, SC; Dorchester, SC; Columbia, GA; Lincoln, GA; McDuffie, GA; McCormick, SC and 4 more areas |
| Headline | Severe Thunderstorm Warning issued June 18 at 5:41PM EDT until June 18 at 6:30PM EDT by NWS Charleston SC |
| Expires | 2026-06-18T18:30:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fe127cd6ea60d4744dddfa782149ac05bb4a9181.001.1","noaa_urn:oid:2.49.0.1.840.0.a27ac6b8b3aab030a49a60dd6f5b30fcbe914302.001.1","noaa_urn:oid:2.49.0.1.840.0.b188ee60bf54d08d9cc8c0b59e9f09338ef6d18c.001.1","noaa_urn:oid:2.49.0.1.840.0.1ee99fd89698a044093b97188eb7577751b80bfd.001.1","noaa_urn:oid:2.49.0.1.840.0.6d42ef6b00df51b34691b81f0acd1ae17a2eff32.001.1","noaa_urn:oid:2.49.0.1.840.0.9faa07da5dad428e35078dbeed4fc189648de2ae.001.1","noaa_urn:oid:2.49.0.1.840.0.6f6da444e5ea37a4ecced1a465d75f33d012bd5b.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 E Aiken |
| Iem County | Aiken |
| Iem State | SC |
| Iem Wfo | CAE |
| Iem Remark | Aiken EM reported tree fell and downed power lines near the entrance to Citizens Park at Woodvale Ln. |
| MergedSources | [{"id":"iem_D_33.540_-81.700_1781810400000","source":"iem","severity":"low","severityValue":25,"timestamp":1781810400000,"latitude":33.54,"longitude":-81.7}] |
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, near Augusta (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.