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Peak Streamflow for the Nation

USGS 11456000 NAPA R NR ST HELENA CA

Napa County, California
Hydrologic Unit Code 18050002
Latitude  38°30'41", Longitude 122°27'17" NAD27
Drainage area 78.8  square miles
Gage datum 191.37 feet above NAVD88
Output formats
Table
Graph
Tab-separated file
peakfq (watstore) format
Reselect output format
Water
Year		 Date Gage
Height
(feet)		 Stream-
flow
(cfs)
1930 1929-12-15 8.80 4,480
1931 1931-01-23 4.32 920
1932 1931-12-27 9.75 5,980
1940 1940-02-27 14.50 11,700
1941 1941-04-04 11.64 7,870
1942 1942-02-06 14.60 11,800
1943 1943-01-21 11.43 7,600
1944 1944-03-04 9.10 4,910
1945 1945-02-01 8.75 4,560
1946 1945-12-27 8.23 4,060
1947 1947-02-12 6.88 2,890
1948 1948-03-23 6.12 2,310
1949 1949-03-11 9.42 4,820
1950 1950-02-04 9.42 4,910
1951 1950-12-03 11.90 7,680
1952 1952-02-01 8.65 4,480
1953 1952-12-07 12.47 8,950
1954 1954-01-17 11.75 8,020
1955 1954-11-15 3.67 670
1956 1955-12-22 15.17 12,600
1957 1957-02-24 7.09 3,110
1958 1958-02-24 13.43 9,640
1959 1959-02-17 9.226 4,890
1960 1960-02-08 14.48 11,600
1961 1961-01-31 6.38 2,160
1962 1962-02-13 11.60 7,730
1963 1963-01-31 15.30 12,300
1964 1964-01-20 9.52 5,020
1965 1965-01-05 14.96 11,800
1966 1966-01-05 13.13 9,190
1967 1967-01-21 15.01 11,100
1968 1968-01-29 9.85 4,970
1969 1969-01-13 11.45 6,600
1970 1970-01-24 13.81 9,450
1971 1970-12-03 14.00 9,700
1972 1971-12-27 5.03 1,120
1973 1973-01-16 15.10 11,300
1974 1974-03-30 11.53 6,680
1975 1975-03-21 13.10 8,540
1976 1976-02-29 4.57 203
1977 1977-01-02 3.746 130
1978 1978-01-16 16.19 10,000
1979 1979-01-11 9.41 2,480
1980 1980-02-17 14.00 7,200
1981 1981-01-27 10.35 3,660
1982 1981-12-19 16.30 10,000
1983 1983-03-13 16.79 10,700
1984 1983-12-25 15.46 9,060
1985 1985-02-08 14.08 7,390
1986 1986-02-17 18.52 16,900
1987 1987-02-13 9.43 2,730
1988 1988-01-04 7.43 1,390
1989 1989-03-11 10.78 3,730
1990 1990-02-16 7.39 1,370
1991 1991-03-04 14.26 6,940
1992 1992-02-20 9.65 2,890
1993 1993-01-20 16.67 7,930
1994 1994-02-20 6.50 900
1995 1995-03-09 18.51 11,100
1996 1996-02-04 14.46 5,8002
2001 2001-03-04 10.19 3,2806
2002 2001-12-01 11.08 3,9706
2003 2002-12-16 16.47 10,2006
2004 2003-12-29 14.92 7,7606
2005 2005-03-22 10.80 3,8906
2006 2005-12-31 23.61 18,3006
2007 2006-12-26 6.87 1,3506
2008 2008-01-04 14.08 4,4606
2009 2009-02-22 11.06 2,8006
2010 2010-01-20 12.99 3,7406
2011 2011-03-20 14.99 7,3306
2012 2012-03-14 10.95 3,5006
2013 2012-12-23 16.87 9,6906
2014 2014-02-09 8.77 2,2006
2015 2014-12-11 15.63 5,5406
2016 2016-03-06 13.85 4,5206
2017 2017-02-07 19.20 9,3406
2018 2018-03-22 11.31 3,9706
2019 2019-02-27 19.50 9,5706
2020 2019-12-07 4.31 6966
2021 2021-01-27 2.26 1786
2022 2021-10-24 16.82 7,5606
2023 2023-01-09 16.71 7,1506
2024 2024-02-04 14.07 5,2906
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  Peak Gage-Height Qualification Codes.
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  Peak Streamflow Qualification Codes.