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SILVER CREEK - UNION VALLEY RESERVOIR (UNVC1)

Latitude: 38.86º N	Longitude: 120.44º W	Elevation: 4870 Feet
Location: El Dorado County in California		River Group: Lower Sacramento

Issuance Time:

Jul 14 2021 at 8:28 AM PDT

Historical Flows

Water Year Seasonal (Apr-Jul)

Year		Annual Flow	2-Year Mean
1925	-1420070400000	189.7
1926	-1388534400000	88.1	138.9
1927	-1356998400000	206.9	147.5
1928	-1325462400000	19.0	113.0
1929	-1293840000000	71.4	45.2
1930	-1262304000000	106.9	89.2
1931	-1230768000000	48.2	77.6
1932	-1199232000000	164.2	106.2
1933	-1167609600000	81.3	122.8
1934	-1136073600000	70.1	75.7
1935	-1104537600000	175.0	122.5
1936	-1073001600000	210.3	192.6
1937	-1041379200000	132.9	171.6
1938	-1009843200000	239.9	186.4
1939	-978307200000	71.1	155.5
1940	-946771200000	204.9	138.0
1941	-915148800000	162.0	183.4
1942	-883612800000	207.4	184.7
1943	-852076800000	212.1	209.7
1944	-820540800000	92.3	152.2
1945	-788918400000	159.2	125.7
1946	-757382400000	168.4	163.8
1947	-725846400000	94.1	131.2
1948	-694310400000	159.1	126.6
1949	-662688000000	117.5	138.3
1950	-631152000000	184.0	150.8
1951	-599616000000	267.7	225.9
1952	-568080000000	281.8	274.8
1953	-536457600000	171.2	226.5
1954	-504921600000	118.2	144.7
1955	-473385600000	101.9	110.0
1956	-441849600000	275.8	188.9
1957	-410227200000	148.9	212.4
1958	-378691200000	223.9	186.4
1959	-347155200000	77.9	150.9
1960	-315619200000	105.9	91.9
1961	-283996800000	71.5	88.7
1962	-252460800000	129.4	100.4
1963	-220924800000	186.8	158.1
1964	-189388800000	106.2	146.5
1965	-157766400000	267.2	186.7
1966	-126230400000	99.9	183.5
1967	-94694400000	259.2	179.6
1968	-63158400000	115.3	187.3
1969	-31536000000	290.1	202.7
1970	0000	224.2	257.1
1971	31536000000	199.4	211.8
1972	63072000000	157.5	178.4
1973	94694400000	190.7	174.1
1974	126230400000	295.9	243.3
1975	157766400000	155.8	225.8
1976	189302400000	65.6	110.7
1977	220924800000	34.0	49.8
1978	252460800000	184.3	109.2
1979	283996800000	131.4	157.9
1980	315532800000	241.3	186.4
1981	347155200000	68.6	155.0
1982	378691200000	359.6	214.1
1983	410227200000	328.1	343.8
1984	441763200000	194.9	261.5
1985	473385600000	126.3	160.6
1986	504921600000	278.4	202.4
1987	536457600000	94.7	186.6
1988	567993600000	175.0	134.8
1989	599616000000	184.1	179.5
1990	631152000000	107.2	145.6
1991	662688000000	125.7	116.4
1992	694224000000	89.0	107.3
1993	725846400000
1994	757382400000
1995	788918400000
1996	820454400000
1997	852076800000
1998	883612800000
1999	915148800000
2000	946684800000
2001	978307200000
2002	1009843200000
2003	1041379200000
2004	1072915200000
2005	1104537600000
2006	1136073600000
2007	1167609600000
2008	1199145600000
2009	1230768000000
2010	1262304000000
2011	1293840000000
2012	1325376000000	102.4
2013	1356998400000	267.0	184.7
2014	1388534400000	157.8	212.4
2015	1420070400000	133.7	145.8
2016	1451606400000	367.7	250.7
2017	1483228800000	806.6	587.2
2018	1514764800000	216.4	511.5
2019	1546300800000	339.7	278.1
2020	1577836800000	86.0	212.9
2021	1609459200000	49.8	67.9

Year		Seasonal Flow	2-Year Mean
1925	-1420070400000	119.1
1926	-1388534400000	52.0	85.6
1927	-1356998400000	136.5	94.2
1928	-1325462400000	0.0	68.2
1929	-1293840000000	58.4	29.2
1930	-1262304000000	68.3	63.3
1931	-1230768000000	31.7	50.0
1932	-1199232000000	131.2	81.4
1933	-1167609600000	75.2	103.2
1934	-1136073600000	27.0	51.1
1935	-1104537600000	151.7	89.4
1936	-1073001600000	150.5	151.1
1937	-1041379200000	115.0	132.8
1938	-1009843200000	176.2	145.6
1939	-978307200000	47.3	111.8
1940	-946771200000	104.0	75.6
1941	-915148800000	107.2	105.6
1942	-883612800000	141.2	124.2
1943	-852076800000	102.4	121.8
1944	-820540800000	77.0	89.7
1945	-788918400000	105.8	91.4
1946	-757382400000	108.4	107.1
1947	-725846400000	52.2	80.3
1948	-694310400000	127.8	90.0
1949	-662688000000	101.4	114.6
1950	-631152000000	135.7	118.5
1951	-599616000000	80.5	108.1
1952	-568080000000	228.1	154.3
1953	-536457600000	128.8	178.5
1954	-504921600000	76.8	102.8
1955	-473385600000	78.1	77.4
1956	-441849600000	138.2	108.1
1957	-410227200000	96.3	117.2
1958	-378691200000	175.6	135.9
1959	-347155200000	46.3	111.0
1960	-315619200000	62.8	54.6
1961	-283996800000	55.9	59.4
1962	-252460800000	113.2	84.5
1963	-220924800000	97.1	105.1
1964	-189388800000	70.3	83.7
1965	-157766400000	109.1	89.7
1966	-126230400000	69.8	89.4
1967	-94694400000	172.4	121.1
1968	-63158400000	55.0	113.7
1969	-31536000000	185.7	120.4
1970	0000	73.9	129.8
1971	31536000000	130.5	102.2
1972	63072000000	82.8	106.7
1973	94694400000	113.8	98.3
1974	126230400000	148.8	131.3
1975	157766400000	125.4	137.1
1976	189302400000	28.1	76.7
1977	220924800000	23.1	25.6
1978	252460800000	115.4	69.3
1979	283996800000	97.2	106.3
1980	315532800000	110.4	103.8
1981	347155200000	46.1	78.2
1982	378691200000	145.4	95.8
1983	410227200000	191.1	168.3
1984	441763200000	84.8	138.0
1985	473385600000	69.0	76.9
1986	504921600000	124.3	96.7
1987	536457600000	45.3	84.8
1988	567993600000	93.9	69.6
1989	599616000000	103.9	98.9
1990	631152000000	58.4	81.1
1991	662688000000	75.0	66.7
1992	694224000000	38.7	56.8
1993	725846400000
1994	757382400000
1995	788918400000
1996	820454400000
1997	852076800000
1998	883612800000
1999	915148800000
2000	946684800000
2001	978307200000
2002	1009843200000
2003	1041379200000
2004	1072915200000
2005	1104537600000
2006	1136073600000
2007	1167609600000
2008	1199145600000
2009	1230768000000
2010	1262304000000
2011	1293840000000	203.1	101.5
2012	1325376000000	65.5	134.3
2013	1356998400000	94.2	79.9
2014	1388534400000	70.4	82.3
2015	1420070400000	38.4	54.4
2016	1451606400000	184.1	111.2
2017	1483228800000	386.7	285.4
2018	1514764800000	110.7	248.7
2019	1546300800000	223.7	167.2
2020	1577836800000	56.4	140.1
2021	1609459200000	31.0	43.7

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ069)

Today: Sunny. Highs 69 to 84 higher elevations and 79 to 91 lower elevations. Prevailing southwest winds up to 15 mph.

Tonight: Clear. Lows 47 to 62 higher elevations and 56 to 70 lower elevations. Prevailing southwest winds 5 to 15 mph shifting to the southeast after midnight.

Friday: Sunny. Highs 69 to 84 higher elevations and 79 to 91 lower elevations. Prevailing southeast winds up to 10 mph shifting to the southwest in the afternoon.

Friday Night: Clear. Lows 46 to 61 higher elevations and 56 to 70 lower elevations. Prevailing southwest winds up to 10 mph with gusts to around 25 mph shifting to the east after midnight.

Saturday: Sunny. Highs 72 to 87 higher elevations and 82 to 94 lower elevations. Prevailing southeast winds up to 10 mph shifting to the southwest in the afternoon.

Saturday Night: Clear. Lows 53 to 68.

Sunday: Sunny. Highs 77 to 92.

Sunday Night: Mostly cloudy. Lows 56 to 71.

Monday: Partly cloudy. Highs 76 to 91.

Monday Night: Mostly clear. Lows 56 to 71.

Tuesday: Sunny. Highs 77 to 92.

Tuesday Night: Mostly clear. Lows 55 to 70.

Wednesday: Sunny. Highs 77 to 92.

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