Source: U.S. Geological Survey, National Water Information System (waterservices.usgs.gov). Percentiles and daily medians are computed from approved daily mean discharge for the same day of the year across each gage's full period of record, following USGS Water Data for the Nation convention. Period of record differs by station. Note that NRCS and CBRFC products use a fixed 1991–2020 reference period, so percent-of-median values shown here will not match theirs exactly. Water-year volumes are accumulated from October 1 and compared to the median accumulation for the same date across the period of record. Water years with gaps in the daily record are excluded from the median rather than counted as low, since a partial year would otherwise bias the comparison. An asterisk marks stations where one or more years were excluded; hover any station for its record counts.