This alert expired on 16 March 2026 at 04:45 UTC. It is kept here as a record.
It is the strongest of the 27 detections recorded within 20 km of this point since 8 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued March 15 at 11:40PM EDT until March 16 at 12:45AM EDT by NWS Charleston SC
An estimated 322,230 people live within 50 km of this point.
Nearby, since 8 March 2026
- May 7, 2026 · score 43 · 2.1 km
- August 3, 2026 · score 43 · 4.1 km
- July 25, 2026 · score 43 · 6.8 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 49 out of 100, at 87 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 49 / 100 |
| Our confidence | 87% |
| Coordinates | 32.8869, -79.4500 |
| Nearest City | Mount Pleasant (40 km) |
| Population Exposed | 322.2K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-03-16T03:40:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 11:40PM 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 |
| Spc ReportType | hail |
| Spc Speed | 175 |
| Spc Location | 2 NNW Goose Creek |
| Spc County | Berkeley |
| Spc State | SC |
| Spc Comments | Trained spotter reported at least two golfball sized hail stones. Most of the hail was the size of a quarter. (CHS) |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | inch |
| Iem City | 2 NNW Goose Creek |
| Iem County | Berkeley |
| Iem State | SC |
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 49/100, near Mount Pleasant (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.