Sierra Nevada SWE reports

Maps of snow water equivalent for the Sierra Nevada expressed as inches and percentages of normal

This research product provides near-real-time estimates of snow-water equivalent (SWE) for areas of California at a spatial resolution of 500 m. 

We create reports for specific regions approximately every two weeks from mid-winter through the end of the melt season. The reports are released within a week of satellite image data acquisition and are distributed to water managers and forecasters.  For more information on reporting or to discuss reporting for your area please contact Leanne.Lestak@colorado.edu.

See also:
Western US SWE reports 2025- (Whole region)

Intermountain West SWE reports 2019-2023 (Colorado, Utah, Wyoming)

User quote

­  We are in the process of finalizing the B-120 update numbers, and are looking at your numbers. Thanks for your efforts to get your product out just in time!
- California Department of Water Resources

 

2026

Feb 01 (PDF | Table 1 | Table 2 | JPG maps zip)
Feb 08 (PDF | Table 1 | Table 2 | JPG maps zip)

2025

All Files for 2025 (2025 zip)
Includes: Report, Table 1, Table2, JPG maps
Feb 01 (PDF | Table 1 | Table 2 | JPG maps zip)
Feb 16 (PDF | Table 1 | Table 2 | JPG maps zip)
Mar 01 (PDF | Table 1 | Table 2 | JPG maps zip)
Mar 15 (PDF | Table 1 | Table 2 | JPG maps zip)
Mar 31 (PDF | Table 1 | Table 2 | JPG maps zip)
Apr 13 (PDF | Table 1 | Table 2 | JPG maps zip)
Apr 20 (PDF | Table 1 | Table 2 | JPG maps zip)
Apr 27 (PDF | Table 1 | Table 2 | JPG maps zip)
May 03 (PDF | Table 1 | Table 2 | JPG maps zip)
May 11 (PDF | Table 1 | Table 2 | JPG maps zip)
May 17 (PDF | Table 1 | Table 2 | JPG maps zip)

 

2024

All Files for 2024 (2024 zip)
Includes: Report, Table 1, Table 2, JPG maps
Feb 01, Feb 12, Feb 29, Mar 18, Apr 01, Apr 08, Apr 15, Apr 22, May 01, May 13, May 20, & May 28

2023

All Files for 2023 (2023 zip)
Includes: Report, Table 1, Table 2, JPG maps
Feb 01, Feb 14, Mar 01, Mar 15, Apr 01, Apr 15, May 01, May 15, May 23, May 30, & Jun 06

2022

All Files for 2022 (2022 zip)
Includes: Report, Table 1, Table 2, JPG maps
Jan 15, Feb 01, Feb 14, Mar 01, Mar 15, Apr 01, Apr 10, Apr 17, Apr 24, May 01, & May 06

2021

All Files for 2021 (2021 zip)
Includes: Report, Table 1, Table 2
Jan 26, Feb 01, Feb 15, Mar 01, Mar 13, Apr 01, Apr 12, Apr 19, Apr 26, May 01, & May 11

2020

All Files for 2020 (2020 zip)
Includes: Report, Table 1, Table 2
Jan 29, Feb 16, Mar 03, Mar 13, Apr 01, Apr 14, Apr 20, Apr 25, May 01, May 10, & May 18

2019

All Files for 2019 (2019 zip)
Includes: Report, Table 1, Table 2
Jan 31, Feb 19, Feb 28, Mar 12, Mar 31, Apr 13, May 02, May 14, & Jun 05