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Upper Cowlitz HUC8 17080004

A 2,655 km² sub-basin of the Pacific Northwest region in WA. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.

Health score
53
Moderate
Drought index
100
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 3 reporting
Median flow
54%
p9 of record
Water assets
1,086
22 springs · 61 wells

USGS gauges (3)

Recent conditions

DateDSCID2+ %Gauges lowFlow pct
2026-10-2210003/3p9
2026-10-2110003/3p9
2026-10-2010003/3p9
2026-10-1910002/2p14
2026-10-1810002/2p14
2026-10-1710002/2p15
2026-10-1610002/3p10
2026-10-1510003/3p14
2026-10-1410003/3p16
2026-10-1310003/3p19
2026-10-1210003/3p14
2026-10-1110002/3p20
2026-10-1010001/3p30
2026-10-0910001/3p27

Top water assets