Right now
The most recent data we hold from NOAA arrived 3 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 30 July 2026 at 06:00 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 16 March 2026 — 10 others scored the same. The last comparable one was on 26 July 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 30 at 12:26AM EDT until July 30 at 2:00AM EDT by NWS Charleston SC
Urban PEI: 213,926 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- August 30, 2026 · score 43 · 7.5 km
- July 11, 2026 · score 43 · 8.3 km
- August 6, 2026 · score 43 · 11.6 km
How we know
6 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 32.5400, -79.5640 |
| Nearest City | Mount Pleasant (39 km) |
| Urban exposure index (PEI) | 213.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-30T04:26:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6edcccde5cff42024be10941a703cfd349ab7faf.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: 2026-07-30T04:26:00.000Z.
First archived: 2026-07-30T05:18:19.566Z. 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 | 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 to 60 NM |
| Headline | Special Marine Warning issued July 30 at 12:26AM EDT until July 30 at 2:00AM EDT by NWS Charleston SC |
| Expires | 2026-07-30T02:00:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 47 |
| Iem Unit | mph |
| Iem City | Charleston Airport |
| Iem County | Charleston |
| Iem State | SC |
| Iem Wfo | CHS |
| Iem Remark | A peak wind gust of 47 mph at the Charleston International Airport (KCHS). |
| MergedSources | [{"id":"iem_M_32.750_-79.870_1785384900000","source":"iem","severity":"low","severityValue":25,"timestamp":1785384900000,"latitude":32.75,"longitude":-79.87},{"id":"iem_M_32.750_-79.920_1785384900000","source":"iem","severity":"low","severityValue":25,"timestamp":1785384900000,"latitude":32.75,"longitude":-79.92},{"id":"iem_H_32.930_-80.070_1785382500000","source":"iem","severity":"low","severityValue":25,"timestamp":1785382500000,"latitude":32.93,"longitude":-80.07},{"id":"iem_M_32.750_-79.900_1785384000000","source":"iem","severity":"low","severityValue":25,"timestamp":1785384000000,"latitude":32.75,"longitude":-79.9},{"id":"iem_G_32.900_-80.040_1785382440000","source":"iem","severity":"low","severityValue":25,"timestamp":1785382440000,"latitude":32.9,"longitude":-80.04}] |
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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