Right now
The most recent data we hold from CO OPS arrived 11 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
75 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by CO OPS today.
It is the 2nd strongest of the 1738 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 1178 more were recorded here in the fortnight before it.
What the source measured
CO OPS reported: Water level 0.50m above predicted at Boston, MA. Observed: 1.03m, Predicted: 0.53m (MLLW datum).
The observed water level was 1.03 m, against 0.53 m predicted.
Urban PEI: 4,688,154 within a heuristic 50 km radius; not unique people.
Nearby, since 10 March 2026
- September 14, 2026 · score 52 · 0.0 km
- September 7, 2026 · score 74 · 0.0 km
- September 6, 2026 · score 52 · 0.0 km
How we know
One source: CO OPS. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Floods |
| Severity | Medium |
| Calamity Score (ours) | 52 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 42.3539, -71.0503 |
| Nearest City | Boston (1 km) |
| Urban exposure index (PEI) | 4.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-14T01:54:00.000Z |
| Source | https://tidesandcurrents.noaa.gov/stationhome.html?id=8443970 |
Physical priority index · v4 (historical). 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: 2026-09-14T01:54:00.000Z.
First archived: 2026-09-14T02:03:40.894Z. 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
| StationId | 8443970 |
| StationName | Boston, MA |
| ObservedM | 1.03 |
| PredictedM | 0.53 |
| SurgeM | 0.5 |
| Datum | MLLW |
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.
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