CNRFC Ensemble Plot for FOLC1

Short-Rng Pks	10D Prob	10 Accum
4x5D Prob	Mnth Prob	Seas Trnd
WY Trend	WY Accum	Multi-Yr Accum
Historical	Verification	Custom

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AMERICAN RIVER - FOLSOM LAKE (FOLC1)

Latitude:
38.71º N

Longitude:
121.16º W

Elevation:
350 Feet

Location: Sacramento County in CA

River Group: Lower Sacramento

Issuance Time:

May 11 2025 at 9:10 AM PDT

Please Note:

Flow data on this product are unregulated / full natural flow.

Historical Flows

Water Year Seasonal (Apr-Jul)

Special Notes:

Uses data from the American River at Fair Oaks gauge through 1955.

Year		Annual Flow	3-Year Mean
1949	-662688000000	1906.1
1950	-631152000000	2705.0
1951	-599616000000	4667.8	3093.0
1952	-568080000000	5030.5	4134.4
1953	-536457600000	2706.4	4134.9
1954	-504921600000	2067.8	3268.2
1955	-473385600000	1606.8	2127.0
1956	-441849600000	4676.5	2783.7
1957	-410227200000	2197.3	2826.8
1958	-378691200000	4157.8	3677.2
1959	-347155200000	1240.8	2532.0
1960	-315619200000	1680.8	2359.8
1961	-283996800000	1054.9	1325.5
1962	-252460800000	2078.9	1604.9
1963	-220924800000	3656.8	2263.5
1964	-189388800000	1689.2	2475.0
1965	-157766400000	4526.3	3290.8
1966	-126230400000	1402.2	2539.2
1967	-94694400000	4053.2	3327.2
1968	-63158400000	1665.7	2373.7
1969	-31536000000	4525.3	3414.7
1970	0000	3331.6	3174.2
1971	31536000000	3055.6	3637.5
1972	63072000000	1962.3	2783.2
1973	94694400000	3103.5	2707.1
1974	126230400000	4429.0	3164.9
1975	157766400000	2665.9	3399.4
1976	189302400000	787.2	2627.4
1977	220924800000	280.5	1244.5
1978	252460800000	3229.1	1432.3
1979	283996800000	2094.3	1868.0
1980	315532800000	3925.3	3082.9
1981	347155200000	1111.3	2377.0
1982	378691200000	6080.8	3705.8
1983	410227200000	6489.7	4560.6
1984	441763200000	3918.8	5496.4
1985	473385600000	1583.8	3997.4
1986	504921600000	4477.8	3326.8
1987	536457600000	814.9	2292.1
1988	567993600000	785.3	2026.0
1989	599616000000	2262.2	1287.5
1990	631152000000	1136.2	1394.6
1991	662688000000	1168.0	1522.1
1992	694224000000	899.2	1067.8
1993	725846400000	3366.9	1811.4
1994	757382400000	791.0	1685.7
1995	788918400000	5483.8	3213.9
1996	820454400000	3622.6	3299.2
1997	852076800000	4468.8	4525.1
1998	883612800000	4305.7	4132.4
1999	915148800000	3617.8	4130.8
2000	946684800000	2755.7	3559.8
2001	978307200000	1073.7	2482.4
2002	1009843200000	2020.0	1949.8
2003	1041379200000	2275.0	1789.5
2004	1072915200000	1626.0	1973.6
2005	1104537600000	3254.3	2385.1
2006	1136073600000	5258.7	3379.7
2007	1167609600000	1280.7	3264.6
2008	1199145600000	1165.9	2568.4
2009	1230768000000	1903.7	1450.1
2010	1262304000000	2110.6	1726.7
2011	1293840000000	4777.3	2930.5
2012	1325376000000	1706.1	2864.6
2013	1356998400000	1675.9	2719.8
2014	1388534400000	955.8	1445.9
2015	1420070400000	839.0	1156.9
2016	1451606400000	2598.2	1464.4
2017	1483228800000	7388.4	3608.6
2018	1514764800000	2350.7	4112.5
2019	1546300800000	4031.1	4590.1
2020	1577836800000	1435.9	2605.9
2021	1609459200000	704.2	2057.0
2022	1640995200000	1896.5	1345.5
2023	1672531200000	4655.2	2418.6
2024	1704067200000	2316.5	2956.1
2025	1735689600000	2342.2	3104.6

Special Notes:

Uses data from the American River at Fair Oaks gauge through 1955.

Year		Seasonal Flow	3-Year Mean
1949	-662688000000	1202.0
1950	-631152000000	1566.8
1951	-599616000000	1069.4	1279.4
1952	-568080000000	2835.9	1824.0
1953	-536457600000	1614.9	1840.1
1954	-504921600000	1035.9	1828.9
1955	-473385600000	932.1	1194.3
1956	-441849600000	1678.4	1215.5
1957	-410227200000	1176.3	1262.3
1958	-378691200000	2537.7	1797.5
1959	-347155200000	532.6	1415.5
1960	-315619200000	744.0	1271.4
1961	-283996800000	590.2	622.3
1962	-252460800000	1210.7	848.3
1963	-220924800000	1749.8	1183.6
1964	-189388800000	885.0	1281.8
1965	-157766400000	1548.6	1394.5
1966	-126230400000	701.8	1045.1
1967	-94694400000	2326.6	1525.7
1968	-63158400000	599.5	1209.3
1969	-31536000000	2191.8	1706.0
1970	0000	808.0	1199.8
1971	31536000000	1496.5	1498.8
1972	63072000000	882.5	1062.3
1973	94694400000	1271.1	1216.7
1974	126230400000	1731.7	1295.1
1975	157766400000	1660.8	1554.5
1976	189302400000	253.9	1215.4
1977	220924800000	182.1	698.9
1978	252460800000	1573.3	669.8
1979	283996800000	1198.9	984.8
1980	315532800000	1294.2	1355.5
1981	347155200000	515.2	1002.8
1982	378691200000	2451.4	1420.3
1983	410227200000	2931.1	1965.9
1984	441763200000	1058.8	2147.1
1985	473385600000	758.1	1582.7
1986	504921600000	1047.7	954.8
1987	536457600000	364.0	723.2
1988	567993600000	276.6	562.7
1989	599616000000	1026.0	555.5
1990	631152000000	532.1	611.6
1991	662688000000	784.5	780.9
1992	694224000000	330.0	548.9
1993	725846400000	1631.7	915.4
1994	757382400000	361.7	774.4
1995	788918400000	2690.2	1561.2
1996	820454400000	1635.9	1562.6
1997	852076800000	802.5	1709.6
1998	883612800000	2267.6	1568.7
1999	915148800000	1549.1	1539.7
2000	946684800000	1079.5	1632.1
2001	978307200000	553.8	1060.8
2002	1009843200000	966.0	866.4
2003	1041379200000	1348.3	956.0
2004	1072915200000	651.2	988.5
2005	1104537600000	1972.9	1324.1
2006	1136073600000	2595.9	1740.0
2007	1167609600000	522.9	1697.3
2008	1199145600000	641.9	1253.6
2009	1230768000000	1036.6	733.8
2010	1262304000000	1481.6	1053.4
2011	1293840000000	2487.3	1668.5
2012	1325376000000	984.5	1651.2
2013	1356998400000	495.0	1322.3
2014	1388534400000	415.4	631.7
2015	1420070400000	192.9	367.8
2016	1451606400000	917.1	508.5
2017	1483228800000	2302.4	1137.5
2018	1514764800000	1071.7	1430.4
2019	1546300800000	2097.3	1823.8
2020	1577836800000	886.1	1351.7
2021	1609459200000	362.5	1115.3
2022	1640995200000	757.1	668.6
2023	1672531200000	2143.8	1087.8
2024	1704067200000	1174.2	1358.4
2025	1735689600000	986.9	1435.0

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ017)

Tonight: Mostly clear. Lows 47 to 53. Southwest winds 10 to 15 mph with gusts to around 35 mph.

Monday: Mostly cloudy with a chance of rain showers in the morning, then partly cloudy with a slight chance of rain showers in the afternoon. Highs 62 to 70. South winds 10 to 15 mph with gusts to around 25 mph.

Monday Night: Mostly clear. Lows around 47. Southwest winds up to 15 mph. Gusts up to 25 mph in the evening.

Tuesday: Mostly sunny. Highs 69 to 76. Northwest winds up to 10 mph.

Tuesday Night: Clear. Lows 46 to 52. West winds up to 10 mph shifting to the southwest after midnight.

Wednesday: Sunny. Highs 76 to 82.

Wednesday Night: Clear. Lows 49 to 55.

Thursday: Sunny. Highs 81 to 89.

Thursday Night: Partly cloudy. Lows 53 to 59.

Friday: Mostly cloudy. Highs 81 to 89.

Friday Night through Saturday Night: Mostly clear. Lows 52 to 58. Highs 80 to 89.

Sunday: Sunny. Highs 83 to 90.