Lake Union siteid=328 · WA
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Water level & flow 2023-07-29 .. 2026-09-09 · SWOT depth track + USGS NWIS gauges · one linked timeline
current depth
20 ft
drawdown
-9.9 ft
below full pool
water level (depth)
100%
20 of
20 ft deep
water stored (volume)
100%
est. from bathymetry
measured
Sep 9
swot_lakesp
pipeline refresh
2026-09-17 22:09 UTC
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elevation trend: robust smoothing + outlier removal · raw value on hover
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Inflow / outflow USGS NWIS daily discharge · same timeline as above
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