Right now
The most recent data we hold from NOAA arrived 6 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 16 March 2026 at 04:45 UTC. It is kept here as a record.
No stronger detection stands among the 55 recorded within 20 km of this point since 16 March 2026 — 29 others scored the same.
What the source measured
NOAA reported: Special Marine Warning issued March 15 at 10:41PM EDT until March 16 at 12:45AM EDT by NWS Charleston SC
An estimated 380,860 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 2, 2026 · score 43 · 5.5 km
- July 12, 2026 · score 43 · 7.0 km
- June 19, 2026 · score 43 · 10.1 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 88 % 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 | 88% |
| Coordinates | 32.7619, -79.6705 |
| Nearest City | Mount Pleasant (18 km) |
| Population Exposed | 380.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T02:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9f74413b0b5484b5648f4c2aba140d293009aa56.001.1 |
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; Waters from South Santee River SC to Edisto Beach SC extending from 20 nm to 40 nm |
| Headline | Special Marine Warning issued March 15 at 10:41PM EDT until March 16 at 12:45AM EDT by NWS Charleston SC |
| Expires | 2026-03-16T00:45:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | inch |
| Iem City | 1 WNW Shadowmoss |
| Iem County | Charleston |
| Iem State | SC |
| Iem Wfo | CHS |
| Iem Remark | A former NWS employee reported dime sized hail in the Village Green subdivision. |
| MergedSources | [{"id":"iem_G_32.900_-80.040_1773630420000","source":"iem","severity":"low","severityValue":25,"timestamp":1773630420000,"latitude":32.9,"longitude":-80.04},{"id":"iem_H_32.850_-80.090_1773630000000","source":"iem","severity":"low","severityValue":25,"timestamp":1773630000000,"latitude":32.85,"longitude":-80.09}] |
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.