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The California-Nevada Drought Early Warning System Region.
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Drought Early Warning System

California-Nevada

Drought in California and Nevada is a common occurrence that can last for multiple years. The regional climate is characterized by a distinct dry season (approximately May to September) and wet season (October to April) defined by a few large precipitation events. Additional peaks in precipitation can occur, such as summer precipitation in southern Nevada due to the North American monsoon. Topography within the region creates a diverse set of climate conditions, from the snowy peaks of the Sierra Nevada Range to the Mojave Desert, to the mountains and valleys of the Basin and Range. Given the extreme variability, both spatially and temporally, efficiently using and effectively managing finite water resources is a high priority. Based on the many connections the two states share with respect to geography, climate, water, and drought, a joint CA-NV drought early warning system (DEWS) was developed to support enhanced drought early warning across the region and to build out NIDIS’s national drought early warning system. 

Primary contact: Amanda Sheffield, Regional Drought Information Coordinator

Featured California-Nevada DEWS Activities

Regional Activities

Regional Activities Summary

The following table highlights activities in California and Nevada that are ongoing efforts related to drought, involve multiple partners, serve as a unique way to address regional drought needs, and are related to at least one of the components of drought early warning. Please contact Amanda Sheffield (amanda.sheffield@noaa.gov) for more information about the table or to inquire about getting an activity added to the list.

Drought Early Warning System (DEWS) Components Legend

Observation & Monitoring
 
Planning & Preparedness
 
Prediction & Forecasting
 
Communication & Outreach
 
Research & Applications

Select filters to browse DEWS Activities below

Description

One of the challenges facing drought preparedness is how to refine linkages between drought indicators and drought impacts across multiple sectors and identify triggers and thresholds for drought…

Scope
State
Key Partners
Public Policy Institute of California
Project Timeline
Sep
2020
Aug
2022
DEWS Components
Description

While there is a strong connection between drought and wildfire in the western United States, how drought influences the post-wildfire environment is less well-understood, especially at shorter (1…

Scope
Region
Key Partners
Western Regional Climate Center, National Weather Service, U.S. Geological Survey, University of Arizona
Project Timeline
Nov
2019
Aug
2023
DEWS Components
Description

National Weather Service drought information statements provide up-to-date reports on the current drought situation for a Weather Forecast Office’s (WFO's) county warning and forecast area. These…

Scope
Region
Key Partners
National Weather Service
Project Timeline
Ongoing
DEWS Components
Description

The Native Waters on Arid Lands (NWAL) project identifies and addresses impacts of climate change on tribal farmers and ranchers in the Great Basin, Southwest, and Northern Rockies. When the COVID…

Scope
Region
Key Partners
Desert Research Institute, University of Nevada Reno, University of Arizona, Crow Canyon Archaeological Center, University of Montana, Salish Kootenai College, USDA
Project Timeline
Ongoing
DEWS Components
Description

The California-Nevada Drought Early Warning System (DEWS) uses networks of federal, tribal, state, local, and academic partners to make climate and…

Scope
Region
Key Partners
Project Timeline
Ongoing
DEWS Components

Observation + Monitoring

When monitoring drought, it is important to look at data across the spectrum—from the atmosphere, land surface, and water availability below the surface. The list of data and maps below has been customized for California and Nevada, and provides a snapshot of conditions across that spectrum, including streamflow, groundwater, snowpack, wildfire, and various derived indices for monitoring drought in the region.

Regional Data and Maps

The WestWide Drought Tracker (WWDT) provides fine-scale drought monitoring and climate products for the Western United States.

 

The California Data Exchange Center is a centralized database that stores, processes, and exchanges real-time hydrologic information on precipitation, river forecast, river stages/flow, snow, and r

This interactive tool shows California groundwater level data, including depth below ground surface, groundwater elevation, and groundwater change in elevation. 

Point maps and interactive maps of snow water equivalent, snow depth, and snow density from the Natural Resources Conservation Service (NRCS) Snow Telemetry (SNOTEL).

The National Interagency Fire Center (NIFC) curates an ArcGIS Online organization to provide a common location for online mapping during wildland fire incident support and response activities.

NOAA and its partners publish regional reports each quarter, summarizing weather, impacts and predictions.

Climate Engine allows users to analyze and interact with climate and earth observations for decision support related to drought, water use, agricultural, wildfire, and ecology.

The CNAP Sierra Nevada Water Storage Tracker provides daily reservoir storage and snowpack information. 

Planning + Preparedness

There is little that can be done to influence the weather patterns that cause drought, but preparatory actions and policies can help communities cope with drought impacts. Drought planning can ensure continuity of public services and quality of life. Drought planning can be done at the local and/or state level, or integrated into existing plans (e.g., hazard mitigation planning, land-use planning).

Regional Drought Planning Resources
Document Date
May 2019

Prediction + Forecasting

When will drought affect me? How long could it last? This section includes resources for drought prediction and forecasting on what could be ahead, including the short-term (e.g., 8–14 day forecast), seasonal to subseasonal (e.g., monthly), and future climate projections (e.g., mid-century). The appropriate time scale will depend upon how this information is being used (e.g., drought response, mitigation management action, long-term planning). Weather and climate prediction is an evolving science, as researchers continue to find ways to improve models and forecasting capabilities at various time scales. 

Regional Forecasts and Outlooks

The U.S. Monthly Drought Outlook predicts whether drought will emerge, stay the same or get better over the next 30 days or so.

The National Significant Wildland Fire Potential Outlook is intended as a decision support tool for wildland fire managers, pr

The National Weather Service (NWS) Climate Prediction Center (CPC) produces monthly and seasonal drought outlooks based on Soil Moisture (CAS).

The Climate Prediction Center (CPC) produces temperature and precipitation outlooks for the U.S., including 6-10 day, 8-14 day, monthly, and seasonal outlooks.

The National Weather Service's Fire Weather Outlooks are intended to delineate areas of the continental U.S.

UC San Diego Scripps Institute of Oceanography Center for Western Weather and Water Extremes (CW3E) provides observation and forecast datasets, including integrated water transport, integrated wate

Communication + Outreach

An important component for drought early warning is communicating this information to stakeholders across the Midwest region that need this information in order to make more informed decisions. There are various ways drought information is communicated across the California-Nevada DEWS, including a bi-monthly webinar series, regular drought status updates, quarterly climate report, and the California-Nevada DEWS email list.

Regional Communications Documents
Document Date
April 2018
Document Date
May 2020

Research + Applications

Research to better understand drought in California and Nevada—and its development, persistence, improvement, and interaction with other hazards—is critical to providing timely and reliable information, products, and services in support of drought early warning. This page highlights research projects that are studying drought in the California-Nevada region, with support from NIDIS.

Regional Interdisciplinary Research

California-Nevada Partners