ALAMEDA C FLOOD CHANNEL A UNION CITY CA
USGS 11180700 · California · reports discharge (live), gauge height
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USGS 11180700 · California · reports discharge (live), gauge height
What the agencies suggest
Carry a pocket thermometer to monitor water temperatureNational Park Service
General guidance from the readings and the published lines named above, not a fishing forecast. Local rules and closures come first.
Reading Nov 5, 8:00 PM PST · provisional USGS data
Normal for Nov 5 Falling · 24 h
Discharge, last 7 days: 169 readings from Oct 29, 9:00 PM PDT to Nov 5, 8:00 PM PST; ranging 0.6 to 30.3 ft³/s; latest 3.25 ft³/s; shaded band: typical range (25th–75th percentile) for each date.
USGS provisional data may be revised. Source: USGS instantaneous values.
| Time | Discharge (ft³/s) | Gauge height (ft) | Normal, 25th–75th (ft³/s) |
|---|---|---|---|
| Nov 5, 8:00 PM PST | 3.25 | 6.85 | 0–3.9 |
| Nov 5, 7:00 PM PST | 3.25 | 6.85 | 0–3.9 |
| Nov 5, 6:00 PM PST | 3.25 | 6.85 | 0–3.9 |
| Nov 5, 5:00 PM PST | 3.25 | 6.85 | 0–3.9 |
| Nov 5, 4:00 PM PST | 3.38 | 6.86 | 0–3.9 |
| Nov 5, 3:00 PM PST | 3.5 | 6.87 | 0–3.9 |
| Nov 5, 2:00 PM PST | 3.63 | 6.88 | 0–3.9 |
| Nov 5, 1:00 PM PST | 3.76 | 6.89 | 0–3.9 |
| Nov 5, 12:00 PM PST | 3.89 | 6.9 | 0–3.9 |
| Nov 5, 11:00 AM PST | 4.16 | 6.92 | 0–3.9 |
| Nov 5, 10:00 AM PST | 4.43 | 6.94 | 0–3.9 |
| Nov 5, 9:00 AM PST | 4.72 | 6.96 | 0–3.9 |
| Nov 5, 8:00 AM PST | 5.02 | 6.98 | 0–3.9 |
| Nov 5, 7:00 AM PST | 5.33 | 7 | 0–3.9 |
| Nov 5, 6:00 AM PST | 5.64 | 7.02 | 0–3.9 |
| Nov 5, 5:00 AM PST | 5.8 | 7.03 | 0–3.9 |
| Nov 5, 4:00 AM PST | 5.8 | 7.03 | 0–3.9 |
| Nov 5, 3:00 AM PST | 5.64 | 7.02 | 0–3.9 |
| Nov 5, 2:00 AM PST | 5.48 | 7.01 | 0–3.9 |
| Nov 5, 1:00 AM PST | 5.17 | 6.99 | 0–3.9 |
| Nov 5, 12:00 AM PST | 4.72 | 6.96 | 0–3.9 |
| Nov 4, 11:00 PM PST | 4.29 | 6.93 | 0–3.7 |
| Nov 4, 10:00 PM PST | 4.02 | 6.91 | 0–3.7 |
| Nov 4, 9:00 PM PST | 3.76 | 6.89 | 0–3.7 |
| Nov 4, 8:00 PM PST | 3.76 | 6.89 | 0–3.7 |
| Nov 4, 7:00 PM PST | 3.63 | 6.88 | 0–3.7 |
| Nov 4, 6:00 PM PST | 3.63 | 6.88 | 0–3.7 |
| Nov 4, 5:00 PM PST | 3.5 | 6.87 | 0–3.7 |
| Nov 4, 4:00 PM PST | 3.5 | 6.87 | 0–3.7 |
| Nov 4, 3:00 PM PST | 3.5 | 6.87 | 0–3.7 |
| Nov 4, 2:00 PM PST | 3.5 | 6.87 | 0–3.7 |
| Nov 4, 1:00 PM PST | 3.63 | 6.88 | 0–3.7 |
| Nov 4, 12:00 PM PST | 3.76 | 6.89 | 0–3.7 |
| Nov 4, 11:00 AM PST | 4.02 | 6.91 | 0–3.7 |
| Nov 4, 10:00 AM PST | 4.43 | 6.94 | 0–3.7 |
| Nov 4, 9:00 AM PST | 4.72 | 6.96 | 0–3.7 |
| Nov 4, 8:00 AM PST | 5.02 | 6.98 | 0–3.7 |
| Nov 4, 7:00 AM PST | 5.33 | 7 | 0–3.7 |
| Nov 4, 6:00 AM PST | 5.64 | 7.02 | 0–3.7 |
| Nov 4, 5:00 AM PST | 5.97 | 7.04 | 0–3.7 |
| Nov 4, 4:00 AM PST | 5.97 | 7.04 | 0–3.7 |
| Nov 4, 3:00 AM PST | 5.97 | 7.04 | 0–3.7 |
| Nov 4, 2:00 AM PST | 5.97 | 7.04 | 0–3.7 |
| Nov 4, 1:00 AM PST | 5.8 | 7.03 | 0–3.7 |
| Nov 4, 12:00 AM PST | 5.64 | 7.02 | 0–3.7 |
| Nov 3, 11:00 PM PST | 5.48 | 7.01 | 0–5.1 |
| Nov 3, 10:00 PM PST | 5.33 | 7 | 0–5.1 |
| Nov 3, 9:00 PM PST | 5.48 | 7.01 | 0–5.1 |
| Nov 3, 8:00 PM PST | 5.64 | 7.02 | 0–5.1 |
| Nov 3, 7:00 PM PST | 5.97 | 7.04 | 0–5.1 |
| Nov 3, 6:00 PM PST | 6.47 | 7.07 | 0–5.1 |
| Nov 3, 5:00 PM PST | 6.82 | 7.09 | 0–5.1 |
| Nov 3, 4:00 PM PST | 7.18 | 7.11 | 0–5.1 |
| Nov 3, 3:00 PM PST | 7.55 | 7.13 | 0–5.1 |
| Nov 3, 2:00 PM PST | 7.93 | 7.15 | 0–5.1 |
| Nov 3, 1:00 PM PST | 8.51 | 7.18 | 0–5.1 |
| Nov 3, 12:00 PM PST | 9.32 | 7.22 | 0–5.1 |
| Nov 3, 11:00 AM PST | 10.6 | 7.28 | 0–5.1 |
| Nov 3, 10:00 AM PST | 9.74 | 7.24 | 0–5.1 |
| Nov 3, 9:00 AM PST | 9.96 | 7.25 | 0–5.1 |
| Nov 3, 8:00 AM PST | 10.4 | 7.27 | 0–5.1 |
| Nov 3, 7:00 AM PST | 11.1 | 7.3 | 0–5.1 |
| Nov 3, 6:00 AM PST | 12 | 7.34 | 0–5.1 |
| Nov 3, 5:00 AM PST | 12.7 | 7.37 | 0–5.1 |
| Nov 3, 4:00 AM PST | 13.4 | 7.4 | 0–5.1 |
| Nov 3, 3:00 AM PST | 14 | 7.42 | 0–5.1 |
| Nov 3, 2:00 AM PST | 14.5 | 7.44 | 0–5.1 |
| Nov 3, 1:00 AM PST | 14.7 | 7.45 | 0–5.1 |
| Nov 3, 12:00 AM PST | 15.3 | 7.47 | 0–5.1 |
| Nov 2, 11:00 PM PST | 15.8 | 7.49 | 0–3 |
| Nov 2, 10:00 PM PST | 16.4 | 7.51 | 0–3 |
| Nov 2, 9:00 PM PST | 16.9 | 7.53 | 0–3 |
| Nov 2, 8:00 PM PST | 17.5 | 7.55 | 0–3 |
| Nov 2, 7:00 PM PST | 18.6 | 7.59 | 0–3 |
| Nov 2, 6:00 PM PST | 19.5 | 7.62 | 0–3 |
| Nov 2, 5:00 PM PST | 20.8 | 7.66 | 0–3 |
| Nov 2, 4:00 PM PST | 22.1 | 7.7 | 0–3 |
| Nov 2, 3:00 PM PST | 23 | 7.73 | 0–3 |
| Nov 2, 2:00 PM PST | 24.4 | 7.77 | 0–3 |
| Nov 2, 1:00 PM PST | 25.4 | 7.8 | 0–3 |
| Nov 2, 12:00 PM PST | 26.5 | 7.83 | 0–3 |
| Nov 2, 11:00 AM PST | 27.5 | 7.86 | 0–3 |
| Nov 2, 10:00 AM PST | 28.7 | 7.89 | 0–3 |
| Nov 2, 9:00 AM PST | 29.5 | 7.91 | 0–3 |
| Nov 2, 8:00 AM PST | 29.9 | 7.92 | 0–3 |
| Nov 2, 7:00 AM PST | 30.3 | 7.93 | 0–3 |
| Nov 2, 6:00 AM PST | 29.1 | 7.9 | 0–3 |
| Nov 2, 5:00 AM PST | 27.5 | 7.86 | 0–3 |
| Nov 2, 4:00 AM PST | 24.7 | 7.78 | 0–3 |
| Nov 2, 3:00 AM PST | 17.2 | 7.54 | 0–3 |
| Nov 2, 2:00 AM PST | 3.89 | 6.9 | 0–3 |
| Nov 2, 1:00 AM PST | 0.6 | 6.54 | 0–3 |
| Nov 2, 12:00 AM PST | 0.6 | 6.54 | 0–3 |
| Nov 1, 11:00 PM PST | 0.6 | 6.54 | 0–4.4 |
| Nov 1, 10:00 PM PST | 0.66 | 6.55 | 0–4.4 |
| Nov 1, 9:00 PM PST | 0.71 | 6.56 | 0–4.4 |
| Nov 1, 8:00 PM PST | 0.77 | 6.57 | 0–4.4 |
| Nov 1, 7:00 PM PST | 0.82 | 6.58 | 0–4.4 |
| Nov 1, 6:00 PM PST | 0.89 | 6.59 | 0–4.4 |
| Nov 1, 5:00 PM PST | 0.95 | 6.6 | 0–4.4 |
| Nov 1, 4:00 PM PST | 1.01 | 6.61 | 0–4.4 |
| Nov 1, 3:00 PM PST | 1.22 | 6.64 | 0–4.4 |
| Nov 1, 2:00 PM PST | 1.37 | 6.66 | 0–4.4 |
| Nov 1, 1:00 PM PST | 1.61 | 6.69 | 0–4.4 |
| Nov 1, 12:00 PM PST | 1.88 | 6.72 | 0–4.4 |
| Nov 1, 11:00 AM PST | 2.16 | 6.75 | 0–4.4 |
| Nov 1, 10:00 AM PST | 2.57 | 6.79 | 0–4.4 |
| Nov 1, 9:00 AM PST | 2.9 | 6.82 | 0–4.4 |
| Nov 1, 8:00 AM PST | 3.38 | 6.86 | 0–4.4 |
| Nov 1, 7:00 AM PST | 3.63 | 6.88 | 0–4.4 |
| Nov 1, 6:00 AM PST | 4.43 | 6.94 | 0–4.4 |
| Nov 1, 5:00 AM PST | 5.8 | 7.03 | 0–4.4 |
| Nov 1, 4:00 AM PST | 10.8 | 7.29 | 0–4.4 |
| Nov 1, 3:00 AM PST | 18.4 | 7.58 | 0–4.4 |
| Nov 1, 2:00 AM PST | 4.87 | 6.97 | 0–4.4 |
| Nov 1, 1:00 AM PST | 0.89 | 6.59 | 0–4.4 |
| Nov 1, 1:00 AM PDT | 0.82 | 6.58 | 0–4.4 |
| Nov 1, 12:00 AM PDT | 0.82 | 6.58 | 0–4.4 |
| Oct 31, 11:00 PM PDT | 0.82 | 6.58 | 0–2.5 |
| Oct 31, 10:00 PM PDT | 0.89 | 6.59 | 0–2.5 |
| Oct 31, 9:00 PM PDT | 0.95 | 6.6 | 0–2.5 |
| Oct 31, 8:00 PM PDT | 0.95 | 6.6 | 0–2.5 |
| Oct 31, 7:00 PM PDT | 1.01 | 6.61 | 0–2.5 |
| Oct 31, 6:00 PM PDT | 1.08 | 6.62 | 0–2.5 |
| Oct 31, 5:00 PM PDT | 1.15 | 6.63 | 0–2.5 |
| Oct 31, 4:00 PM PDT | 1.22 | 6.64 | 0–2.5 |
| Oct 31, 3:00 PM PDT | 1.3 | 6.65 | 0–2.5 |
| Oct 31, 2:00 PM PDT | 1.37 | 6.66 | 0–2.5 |
| Oct 31, 1:00 PM PDT | 1.53 | 6.68 | 0–2.5 |
| Oct 31, 12:00 PM PDT | 1.61 | 6.69 | 0–2.5 |
| Oct 31, 11:00 AM PDT | 1.88 | 6.72 | 0–2.5 |
| Oct 31, 10:00 AM PDT | 2.16 | 6.75 | 0–2.5 |
| Oct 31, 9:00 AM PDT | 2.36 | 6.77 | 0–2.5 |
| Oct 31, 8:00 AM PDT | 2.68 | 6.8 | 0–2.5 |
| Oct 31, 7:00 AM PDT | 3.25 | 6.85 | 0–2.5 |
| Oct 31, 6:00 AM PDT | 3.76 | 6.89 | 0–2.5 |
| Oct 31, 5:00 AM PDT | 4.29 | 6.93 | 0–2.5 |
| Oct 31, 4:00 AM PDT | 4.58 | 6.95 | 0–2.5 |
| Oct 31, 3:00 AM PDT | 4.58 | 6.95 | 0–2.5 |
| Oct 31, 2:00 AM PDT | 4.43 | 6.94 | 0–2.5 |
| Oct 31, 1:00 AM PDT | 4.02 | 6.91 | 0–2.5 |
| Oct 31, 12:00 AM PDT | 3.5 | 6.87 | 0–2.5 |
| Oct 30, 11:00 PM PDT | 3.02 | 6.83 | 0–3.3 |
| Oct 30, 10:00 PM PDT | 2.79 | 6.81 | 0–3.3 |
| Oct 30, 9:00 PM PDT | 2.79 | 6.81 | 0–3.3 |
| Oct 30, 8:00 PM PDT | 2.68 | 6.8 | 0–3.3 |
| Oct 30, 7:00 PM PDT | 2.68 | 6.8 | 0–3.3 |
| Oct 30, 6:00 PM PDT | 2.57 | 6.79 | 0–3.3 |
| Oct 30, 5:00 PM PDT | 2.36 | 6.77 | 0–3.3 |
| Oct 30, 4:00 PM PDT | 2.06 | 6.74 | 0–3.3 |
| Oct 30, 3:00 PM PDT | 1.88 | 6.72 | 0–3.3 |
| Oct 30, 2:00 PM PDT | 1.7 | 6.7 | 0–3.3 |
| Oct 30, 1:00 PM PDT | 1.79 | 6.71 | 0–3.3 |
| Oct 30, 12:00 PM PDT | 1.88 | 6.72 | 0–3.3 |
| Oct 30, 11:00 AM PDT | 2.16 | 6.75 | 0–3.3 |
| Oct 30, 10:00 AM PDT | 2.46 | 6.78 | 0–3.3 |
| Oct 30, 9:00 AM PDT | 2.68 | 6.8 | 0–3.3 |
| Oct 30, 8:00 AM PDT | 3.02 | 6.83 | 0–3.3 |
| Oct 30, 7:00 AM PDT | 3.63 | 6.88 | 0–3.3 |
| Oct 30, 6:00 AM PDT | 4.02 | 6.91 | 0–3.3 |
| Oct 30, 5:00 AM PDT | 4.43 | 6.94 | 0–3.3 |
| Oct 30, 4:00 AM PDT | 4.72 | 6.96 | 0–3.3 |
| Oct 30, 3:00 AM PDT | 4.72 | 6.96 | 0–3.3 |
| Oct 30, 2:00 AM PDT | 4.43 | 6.94 | 0–3.3 |
| Oct 30, 1:00 AM PDT | 3.89 | 6.9 | 0–3.3 |
| Oct 30, 12:00 AM PDT | 3.38 | 6.86 | 0–3.3 |
| Oct 29, 11:00 PM PDT | 2.9 | 6.82 | 0–5 |
| Oct 29, 10:00 PM PDT | 2.68 | 6.8 | 0–5 |
| Oct 29, 9:00 PM PDT | 2.57 | 6.79 | 0–5 |
Map of USGS gauge 11180700 and the river around it
Where ALAMEDA C FLOOD CHANNEL A UNION CITY CA sits, with 6 other gauges on the same river.
No current water-temperature reading at this gauge, so no temperature guidance is given. Take a stream thermometer: the trout lines CDFW uses are 67°F.
Normal for Nov 5: 0–3.9 ft³/s (middle half of 67 years of record). Now: 3.25 ft³/s, normal.
Normal for this date. 3.25 ft³/s is between the 25th and 75th percentiles of daily mean flow for Nov 5 at this gauge over 67 years of record (1959–2025): 10th 0, 25th 0, median 0.32, 75th 3.9, 90th 15 ft³/s.
Daily means on record for Nov 5: lowest 0 ft³/s, highest 60.2 ft³/s.
Classes as USGS labels them (hyswap: flow categories (WDFN_stats schema) (U.S. Geological Survey) ); percentiles from the USGS daily statistics (U.S. Geological Survey) (approved daily means; the reading is provisional and instantaneous).
Falling over 24 hours: discharge down 13.6%, from 3.76 to 3.25 ft³/s. Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.
Species list not on file for this gauge. Check the California Department of Fish and Wildlife: California fish planting schedule · California fishing regulations.
Turn Around Don't Drown. “A mere 6 inches of fast-moving flood water can knock over an adult.” No flow number makes a crossing safe; if in doubt, stay out.
Turn Around Don't Drown (National Weather Service)Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.
NWS observed 6.85 ft stage, 3 ft³/s at Nov 5, 7:00 PM PST (NWS gauge PUKC1; its stage datum can differ from the USGS gauge height).
NWS has not set flood categories for this gauge.
Graphical forecasts are not available during times of high water, forecast crest information can be found in the local WFO web page.
Open the NWS gauge page · What the categories mean (National Weather Service)
Checked Nov 5, 8:32 PM PST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.