Hudson River at Green Island, NY
USGS gauge 01358000 · drainage 8,090 sq mi · observed Oct 16, 9:15 PM EDT · 65 min old
Last 7 days Live gauge
Source: USGS Water Data API (continuous values), observed to Oct 16, 9:15 PM EDT. Shaded band: 25th to 75th percentile of USGS daily statistics for each date; dashed: median. Flow in cfs.
Rate of rise and fall Live gauge
| Window | Flow then | Change to latest | Gage height then | Gage height change |
|---|---|---|---|---|
| 1 h | 7,470 cfs | ▼ -190 cfs (-2.5%) | 16.32 ft | -0.09 ft |
| 3 h | 9,190 cfs | ▼ -1,910 cfs (-20.8%) | 16.53 ft | -0.30 ft |
| 6 h | 9,580 cfs | ▼ -2,300 cfs (-24.0%) | 16.69 ft | -0.46 ft |
| 12 h | 8,510 cfs | ▼ -1,230 cfs (-14.5%) | 16.65 ft | -0.42 ft |
| 24 h | 4,700 cfs | ▲ +2,580 cfs (+54.9%) | 16.38 ft | -0.15 ft |
Last 7 days
| Measure | Flow | Time | Relative to latest reading |
|---|---|---|---|
| Highest reading | 14,100 cfs | Oct 16, 11:45 AM EDT | 10 h earlier |
| Lowest reading | 130 cfs | Oct 13, 3:45 PM EDT | 78 h earlier |
Source: computed from USGS continuous readings (Water Data API) to Oct 16, 9:15 PM EDT. Each row compares the latest reading with the reading closest to that many hours earlier; the arrow is steady (▬) when the change is within 1%.
Daily mean flow Live gauge
| Date (gauge-local) | Mean flow | Note |
|---|---|---|
| Oct 16, 2026 | 8,562 cfs | |
| Oct 15, 2026 | 6,706 cfs | |
| Oct 14, 2026 | 6,090 cfs | |
| Oct 13, 2026 | 4,454 cfs | |
| Oct 12, 2026 | 5,420 cfs | |
| Oct 11, 2026 | 5,503 cfs | |
| Oct 10, 2026 | 4,425 cfs | |
| Oct 9, 2026 | 4,277 cfs | |
| Oct 8, 2026 | – | Partial day |
Source: USGS Water Data API (continuous values); each mean uses readings on that gauge-local date, shown only with at least 80% of expected readings.
The same 50 days in earlier years Historical record
━ 2026 ╌ 2025 ╌ 2024 ╌ 2023
| Year | Mean flow | Highest day |
|---|---|---|
| 2026 | 5,404 cfs | 7,930 cfs |
| 2025 | 4,914 cfs | 9,360 cfs |
| 2024 | 5,366 cfs | 8,920 cfs |
| 2023 | 12,478 cfs | 38,500 cfs |
Source: USGS daily mean flows (Water Data API). Each line is the 50 days from Aug 27 to Oct 15, shifted to the same calendar dates in earlier years; gaps are days without a published value. Recent days are provisional.
Compared with this gauge’s record Historical record
| Measure | Value | When or rank |
|---|---|---|
| Peak daily flow, last 7 days | 6,870 cfs | Oct 15, 2026 |
| Last time daily flow was this high or higher | 7,930 cfs | Sep 30, 2026 (15 days earlier) |
| Last day above the 90th percentile for its date, before this peak | Aug 4, 2026 | 2 months earlier |
| Days above the 75th percentile for their date | 0 of 30 | last 30 days |
| October 1 to 15, mean flow | 5,051 cfs | rank 60 highest of 78 years |
| Peak daily mean compared with annual instantaneous peaks of record | Below the lowest of 81 | lowest annual peak 37,400 cfs |
Source: USGS daily mean flows (Water Data API), 1946 to 2026 (28,463 days), data through Oct 15, 2026, computed 2026-10-17; method record-v1. Percentiles are USGS daily statistics. Recent days are provisional.
Largest annual peaks Historical record
Ten largest peaks of record
| Date | Peak flow | Gage height at peak |
|---|---|---|
| Mar 19, 1936 | 215,000 cfs | 29.48 ft |
| Dec 31, 1948 | 181,000 cfs | 27.05 ft |
| Aug 29, 2011 | 181,000 cfs | 27.05 ft |
| Mar 14, 1977 | 175,000 cfs | 26.53 ft |
| Jan 20, 1996 | 165,000 cfs | 26.22 ft |
| Mar 6, 1964 | 141,000 cfs | 24.82 ft |
| Jan 9, 1998 | 140,000 cfs | 24.77 ft |
| Apr 5, 1960 | 135,000 cfs | 24.41 ft |
| Apr 4, 2005 | 131,000 cfs | 24.22 ft |
| Mar 22, 1980 | 123,000 cfs | 23.62 ft |
Five most recent annual peaks
| Date | Peak flow | Gage height at peak |
|---|---|---|
| May 10, 2025 | 94,500 cfs | 21.93 ft |
| Dec 19, 2023 | 115,000 cfs | 23.64 ft |
| May 2, 2023 | 64,200 cfs | 20.33 ft |
| Apr 9, 2022 | 115,000 cfs | 23.44 ft |
| Dec 26, 2020 | 98,600 cfs | 22.81 ft |
Source: USGS annual peak streamflow (Water Data API), 81 annual peaks, 1936 to 2025. A water year's peak is its highest instantaneous flow.
Historic crests Official NWS
| Date | Crest stage | Flow |
|---|---|---|
| Mar 27, 1913 | 29.70 ft | 220,000 cfs |
| Mar 18, 1936 | 29.48 ft | 215,000 cfs |
| Sep 21, 1938 | 27.10 ft | 181,000 cfs |
| Aug 29, 2011 | 27.05 ft | 181,949 cfs |
| Dec 30, 1948 | 27.05 ft | 181,000 cfs |
| Mar 13, 1977 | 26.53 ft | 175,000 cfs |
| Jan 20, 1996 | 26.22 ft | 165,000 cfs |
| Mar 5, 1964 | 24.82 ft | 141,000 cfs |
| Jan 9, 1998 | 24.77 ft | 140,000 cfs |
| Apr 4, 1960 | 24.41 ft | 135,000 cfs |
Source: National Weather Service forecast point TRYN6 (Hudson River at Troy), historic crests as published by the NWS; the NWS may have recorded them on an older gauge datum. The USGS annual peaks above are a separate record and can differ in date, flow and datum.
Flood stages Official NWS
| Category | Gage height (ft) |
|---|---|
| Action | 21.0 ft |
| Minor | 21.5 ft |
| Moderate | 24.0 ft |
| Major | 27.0 ft |
Source: National Weather Service forecast point TRYN6 (Hudson River at Troy), fetched Oct 16, 10:16 PM EDT. Compare with the gage height above; thresholds belong to that forecast point.
Flood impacts by stage Official NWS
| Stage | National Weather Service impact statement |
|---|---|
| 21.0 ft | Action stage. Water is just six inches below the wharf in Waterford. |
| 21.5 ft | Minor flood stage. Water floods onto the Mohawk Wharf in Village of Waterford. |
| 23.0 ft | Water reaches streets in Waterford Village and Matsons Shipyard on Van Schaick Island. Some basements flood. |
| 24.0 ft | The river is at moderate flood stage. Water reaches mobile homes along the river front in Lansingburgh. |
| 27.0 ft | The river is at major flood stage. Water reaches numerous homes in the Village of Wateford and in riverfront sections of Troy. About 4 feet water at foot of State Street. |
| 29.0 ft | There are several feet of water on Riverside Street, three feet water in the former Cluett-Peabody building, First and Second Streets in Troy are flooded, and the Congress Street Bridge is closed. |
Source: National Weather Service forecast point TRYN6 (Hudson River at Troy). Statements are quoted from the NWS and describe that forecast point.
Sources and method
- Data: U.S. Geological Survey. Terms
- River forecasts and flood stages: National Weather Service. National Water Model guidance: NOAA. Terms
USGS daily statistics, downloaded 2026-10-12
Percentile method: trailing 24 h mean vs USGS daily percentiles for calendar date 10-16.
Percentile is estimated from USGS published daily percentiles. Readings are provisional until USGS reviews them. Not endorsed by USGS, NOAA or the National Weather Service. Not for navigation or safety-of-life decisions; the absence of an alert is not a statement that conditions are safe.