3/31/2014

1

Update on Drought ConditionsUpdate on Drought Conditions

Municipal Water District of Orange CountyMunicipal Water District of Orange County

April 2April 2 20142014April 2, April 2, 20142014

March 2014 PrecipitationMarch 2014 PrecipitationPercent of NormalPercent of Normal

Source: High Plains Regional Climate Center

3/31/2014

2

1427% of

Average

RainfallRainfall in MWD Service Areain MWD Service AreaWater YearWater Year aas of March s of March 3030, 2014, 2014

3.3 4.2

2.5

4.5 4

6

8

10

12IN

CH

ES

Historical Average

0

2

John Wayne Airport

Los Angeles International

RiversideAirport

San Diego Lindbergh Field

Source: National Weather Service, San Diego Forecast Office

40

50

Northern Sierra 8Northern Sierra 8‐‐Station IndexStation IndexAs of March 31, 2014As of March 31, 2014

Historical Average

Accumulated Precipitation

0

10

20

30

40

10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1

INC

HES

10 4 15

Monthly Precipitation

3.0 6.3

8.4 9.0

3.9 2.1 1.0 0.2 0.3 0.9 0.8 1.6 0.8 1.2

10.4 10.2

0

5

10

OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

INC

HES Historical Average

3/31/2014

3

Snow Water Equivalents Snow Water Equivalents As of March 31, 2014As of March 31, 2014

Northern Sierra

Central Sierra

Southern Sierra

Snow Water Equivalent

Statewide AverageNational Weather Service

•• February 27 Monthly Snow February 27 Monthly Snow Survey:Survey:

California State Water ProjectCalifornia State Water Project"Table A" Allocation"Table A" Allocation

yy

•• Continued record Continued record zero percent zero percent SWP “Table A” AllocationSWP “Table A” Allocation

•• Available water used for:Available water used for:

•• Carryover storage operationsCarryover storage operations

•• Essential health and safety Essential health and safety needs,needs,

•• Water quality and Water quality and environmental standardsenvironmental standards

•• Next snow survey scheduled Next snow survey scheduled for April 1for April 1

February 27, 2014 DWR Snow Survey

3/31/2014

4

•• Low Delta outflows & high salinity near pumpsLow Delta outflows & high salinity near pumps

•• Potential TDS at Banks Pumping Plant of >1,000 mg/l Potential TDS at Banks Pumping Plant of >1,000 mg/l 

Bay Delta SalinityBay Delta Salinity

(~400(~400‐‐600 with Delta actions)600 with Delta actions)

Northern Sierra Precipitation ProjectionsNorthern Sierra Precipitation ProjectionsAssuming Average ConditionsAssuming Average Conditions

8-Station Index Accumulated Precipitation

20

30

40

50

INC

HES

0

10

10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1

3/31/2014

5

Statewide ReservoirStatewide Reservoir ElevationsElevationsAs of March 31,As of March 31, 20142014

2,500

3,000

3,500

Historical Average

1,000

1,500

2,000

-

500

1,000

1,500

2,000

Oct-13 Feb-14 Jun-14

Historical Average

-

500

Oct-13 Feb-14 Jun-14

San Luis

Lake Oroville

Lake OrovilleLake Oroville

Source: MWDOC SWP Inspection Trip, March 8, 2014

3/31/2014

6

Upper Colorado River Upper Colorado River SnowpackSnowpackMarch March 3030, 2014, 2014

Snowpack Water Equivalent

10

15

20

25

Inch

es

Historical Average

0

5

10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1

Average

20

25

Colorado River Reservoir ConditionsColorado River Reservoir ConditionsAs of March 24,As of March 24, 20142014

0

5

10

15

Milli

on A

cre-

Feet

Lake Powell15

20

25

n Ac

re-F

eet

39%CAPACITY

Lake Powell

0

5

10

Milli

on

Lake Mead

43%CAPACITY

3/31/2014

7

1,160

Lake Mead ElevationLake Mead ElevationMarch 2014 March 2014 -- 24 Month Study24 Month Study

1 090

1,100

1,110

1,120

1,130

1,140

1,150

Feet

Surplus Trigger (1,145)

1,103. FeetHistorical

Projection

1,060

1,070

1,080

1,090

1/02 1/03 1/04 1/05 1/06 1/07 1/08 1/09 1/10 1/11 1/12 1/13 1/14 1/15 1/16

Shortage Trigger (1,075)

j

MWD 2014 MWD 2014 Available Available SuppliesSupplies

•• State Water Project (600 TAF)State Water Project (600 TAF)

–– “Table A” Allocation = 0“Table A” Allocation = 0

–– Storage & Program = 600 TAFStorage & Program = 600 TAF

•• Colorado River Aqueduct (1.2 MAF)Colorado River Aqueduct (1.2 MAF)

–– Priority 4 = 550 TAFPriority 4 = 550 TAF

–– Colorado System Storage & Programs Colorado System Storage & Programs = 650 TAF= 650 TAF

•• In Region Storage (200 TAF)In Region Storage (200 TAF)

•• Diamond Valley LakeDiamond Valley Lake

•• Conjunctive Use ProjectsConjunctive Use Projects

3/31/2014

8

Metropolitan Dry Year StorageMetropolitan Dry Year Storage

Potential S Storage Actions

2.2 1.7 1.7

2.4 2.7

2.4

1 0

1.5

2.0

2.5

3.0

ion

Acre

-Fee

t

* Does not include 636 TAF of Metropolitan Emergency Storage.

1.1 1.0

-

0.5

1.0

2006 2007 2008 2009 2010 2011 2012 2013 2014

Mill

End of Calendar Year

April 2014 Precipitation OutlookApril 2014 Precipitation Outlook

Source: NOAA/ National Weather Service, Climate Prediction Center

3/31/2014

9

Questions?Questions?