Right now
The most recent data we hold from NOAA arrived 14 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 14:45 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 19 June 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 June 19 at 10:29AM EDT until June 19 at 10:45AM EDT by NWS Charleston SC
Nearby, since 19 June 2026
- August 29, 2026 · score 22 · 5.2 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 22 / 100 |
| Legacy data-support index | 0.66/1 |
| Coordinates | 32.3833, -78.8550 |
| Nearest City | Mount Pleasant (104 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-19T14:29:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.07a25fb4e3c3a238f4a988011c8b1a31aefa18d1.001.1 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-19T14:29:00.000Z.
First archived: 2026-06-19T14:43:28.019Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM |
| Headline | Special Marine Warning issued June 19 at 10:29AM EDT until June 19 at 10:45AM EDT by NWS Charleston SC |
| Expires | 2026-06-19T10:45:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 45 |
| Iem Unit | mph |
| Iem City | 46 SSE McClellanville |
| Iem County | AMZ380 |
| Iem State | SC |
| Iem Wfo | CHS |
| Iem Remark | Buoy 41004 reported a peak wind gusts of 39 kts. |
| MergedSources | [{"id":"iem_M_32.500_-79.100_1781875800000","source":"iem","severity":"low","severityValue":25,"timestamp":1781875800000,"latitude":32.5,"longitude":-79.1}] |
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 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.
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