Hydrologic Conditions UpdateMay 2021

Kelly Peterson

Drought Task Force

May 18, 2021

2021 Water Year:

Oct. 1, 2020 – Sept. 30, 2021

2015 WY

• Sacramento River

• Feather River

• Yuba River

• American River

Water Year Indices for the Sacramento River Basin are based on runoff from 4 rivers over 2 years.

Current Year Oct. - Mar.

Previous Year WYI

Current April - July

30%

30%40%

2021 Water Year = Critical

Snowpack ConditionsNorthern Region

This Year April 1st

LastYear April 1st

66 % Normal for Date 57 % Normal for Date

18.4’’ Average Snow Water Equivalent

17.2’’ Average Snow Water Equivalent

Snowpack ConditionsNorthern Region

Reservoir Storage

Lake Oroville Water Levels (feet)

Bars = median WSE change, triangles show range“ * ” = areas primarily served by surface water

2012-2016 Drought

https://www.gov.ca.gov/wp-content/uploads/2021/05/5.10.2021-Drought-Proclamation.pdf

$5.1 billion package

Questions/Discussion