Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 19 June 2026 at 13:00 UTC. It is kept here as a record.
No stronger detection stands among the 114 recorded within 20 km of this point since 16 March 2026 — 44 others scored the same. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 19 at 8:25AM EDT until June 19 at 9:00AM EDT by NWS Charleston SC
An estimated 429,708 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 26, 2026 · score 43 · 5.9 km
- August 2, 2026 · score 43 · 6.7 km
- July 12, 2026 · score 43 · 10.4 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 32.7713, -79.7784 |
| Nearest City | Mount Pleasant (8 km) |
| Population Exposed | 429.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-19T12:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.90d0f84bdf7c6bd73143397aa798fa07 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Charleston Harbor; Coastal waters from South Santee River to Edisto Beach SC out 20 NM; Coastal waters from Edisto Beach SC to Savannah GA out 20 NM; Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM; Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM |
| Headline | Special Marine Warning issued June 19 at 8:25AM EDT until June 19 at 9:00AM EDT by NWS Charleston SC |
| Expires | 2026-06-19T09:00:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.90d0f84bdf7c6bd73143397aa798fa072eb49302.001.1","noaa_urn:oid:2.49.0.1.840.0.9d918640f68c60b33508355635ee47b53716c9bc.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 53 |
| Iem Unit | mph |
| Iem City | 2 WSW Folly Beach |
| Iem County | Charleston |
| Iem State | SC |
| Iem Wfo | CHS |
| MergedSources | [{"id":"iem_M_32.750_-79.870_1781870340000","source":"iem","severity":"low","severityValue":25,"timestamp":1781870340000,"latitude":32.75,"longitude":-79.87},{"id":"iem_M_32.640_-79.970_1781871300000","source":"iem","severity":"low","severityValue":25,"timestamp":1781871300000,"latitude":32.64,"longitude":-79.97}] |
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 near Mount Pleasant?
Calamity.live data shows a weather event with CalamityScore 43/100, near Mount Pleasant (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.