Right now
The most recent data we hold from CO OPS arrived 2 hours ago, and this point is in it.
189 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by CO OPS today.
It is the 35th strongest of the 749 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 855 more were recorded here in the fortnight before it.
What the source measured
CO OPS reported: Water level 9.84 ft above the station datum at Charleston, SC, at or above NOAA's minor coastal flood threshold of 9.77 ft; +0.49 m against the predicted tide.
Urban PEI: 429,708 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 25, 2026 · score 43 · 0.0 km
- September 16, 2026 · score 43 · 0.0 km
- September 15, 2026 · score 43 · 0.0 km
How we know
2 recorded sources include CO OPS; independence is not established by this count.
Our own score for this event is 30 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Floods |
| Severity | Medium |
| Calamity Score (ours) | 30 / 100 |
| Legacy data-support index | 0.75/1 |
| Coordinates | 32.7817, -79.9236 |
| Nearest City | Charleston (1 km) |
| Urban exposure index (PEI) | 429.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-25T12:30:00.000Z |
| Source | https://tidesandcurrents.noaa.gov/stationhome.html?id=8665530 |
Physical priority index · v5. 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: co_ops. Occurrence: 2026-09-25T12:30:00.000Z.
First archived: 2026-09-25T11:35:13.047Z. Material modification: 2026-09-25T12:39:23.400Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-25T12:39:23.400Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-25T12:34:01.251Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-25T12:28:36.284Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-25T12:23:09.976Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-25T12:12:35.049Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-25T12:02:00.444Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-25T11:56:43.329Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-25T11:45:58.134Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-25T11:40:40.546Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| StationId | 8665530 |
| StationName | Charleston, SC |
| WaterLevelFt | 9.84 |
| FloodCategory | minor |
| FloodThresholdFt | 9.77 |
| SurgeM | 0.49 |
| Datum | STND |
| Iem TypeSummary | Coastal flood |
| Iem LsrCode | v |
| Iem LsrType | COASTAL FLOOD |
| Iem City | 1 E Charleston |
| Iem County | Charleston |
| Iem State | SC |
| Iem Wfo | CHS |
| Iem Remark | CHTS1 Moderate Coastal Flooding: A maximum tide level of 7.5 ft MLLW (1.74 ft MHHW) was observed at the Charleston Harbor tide gage. Moderate coastal flooding typically begins along the coasts of Char |
| MergedSources | [{"id":"iem_v_32.780_-79.930_1790292600000","source":"iem","severity":"low","severityValue":25,"timestamp":1790292600000,"latitude":32.78,"longitude":-79.93}] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens near Charleston?