Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Threat to 75% of California’s Agricultural Water Supply from Decreased Snowpack


A new study funded in part by NOAA’s Climate Program Office finds that a 1 degree increase in winter average temperature increases the probability of a below-average winter snowpack by 20% while a 2 degree warming increases that probability to 40%. Given the heavy reliance on snowmelt and runoff during the low-precipitation Californian summer, this decrease in snowpack in a warmed climate will further stress California’s water resources, which support a very large population in Southern California as well as over $30 billion dollars in annual agricultural productivity.

Read the full paper HERE.

Article written by Dan Barrie, MAPP Program Manager

Photo credit: NASA Earth Obervatory 

About MAPP
The Modeling, Analysis, Predictions, and Projections (MAPP) Program is a competitive research program in NOAA Research’s Climate Program Office. MAPP’s mission is to enhance the Nation’s and NOAA’s capability to understand, predict, and project variability and long-term changes in Earth’s system and mitigate human and economic impacts. To achieve its mission, MAPP supports foundational research, transition of research to applications, and engagement across other parts of NOAA, among partner agencies, and with the external research community. MAPP plays a crucial role in enabling national preparedness for extreme events like drought and longer-term climate changes. For more information, please visit

View More MAPP News.



Scroll to Top