WY 2015 – El Niño to the
Rescue?
Urban Water Institute
August 13, 2014
Talk Overview
• Current Drought Conditions
• El Niño and Northern California Outcomes
California Reservoir Storage, Percent of Normal, 1977 and 2010-14
140
2011
120
2010
2012
100
80
2013
2014
60
40
1977
1-Dec
1-Nov
1-Oct
1-Sep
1-Aug
1-Jul
1-Jun
1-May
1-Apr
1-Mar
1-Feb
1-Jan
20
Source: California Department of Water Resources
Annual Precipitation (inches)
NOAA Climate Division 2 Calendar Year Data
1895-2013
80
70
60
50
40
30
20
10
0
1976
50
51
52
53
54
2013
55
56
Annual Mean Temperature (degrees F)
57
8 Station Index Water Year Totals
100
3 Drought Busting
90
Precipitation in inches
80
10 Holding Steady/Some Improvement
70
60
50
9 Drought Continuing
40
30
20
10
0
1950
1960
Strong El Nino
El Nino Average
1970
1980
Water Year (Oct 1 – Sep 30)
Moderate El Nino
Period of Record Average
1990
2000
Weak El Nino
2010
San Joaquin 5 Station Index Precipitation
Water Year Totals for El Nino Years
90
5 Drought Busting
Precipitation in inches
80
70
60
50
4 Holding Steady/Some Improvement
40
13 Drought Continuing
30
20
10
0
1950
1960
Strong El Ninos
1970
1980
1990
Water Year (Oct 1 – Sep 30)
Moderate El Ninos
Weak El Ninos
El Nino Average
2000
2010
Period of Record Average
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WY 2015 * El Niño to the Rescue?