WATER AND HYDROLOGY RESOURCES
ON THE INTERNET
Reservoir conditions, precipitation indexes, snow charts, drought maps and more …
Go here for an interactive map of the major reservoirs in the state. Click on a reservoir name to see storage graphs for individual reservoirs. (Click here for non-interactive version.)
This variation of the standard DWR reservoir webpage shows the amount of storage available for flood control.
For even more on reservoir conditions …
- Click here for the California Data Exchange Center (CDEC) webpage for reservoirs.
- For more information on Central Valley reservoirs and operations, click here.
Click on the image to view a graph of the Northern Sierra 8-station index.
Check out a graph of the San Joaquin 5-station index here.
Check out the newest index, the Tulare Basin Six Station index here.
You can see a rainfall map for the last hour, six hours, 24 hours, or more at this webpage. Look at it statewide or by region.
For even more on precipitation …
View a snow water content graph for the water year for each of the three zones in the Sierras.
Get a simple map of current snow water content levels of the three zones in the Sierras here.
You can find just about anything else you want to know about the snowpack – like temperature, snowmelt, sublimation and more – at the National Weather Service’s Snow Analysis page.
For even more on snow conditions:
Find real-time streamflow conditions, water quality data, and other current California conditions including surface-water, groundwater, spring sites, atmospheric sites and more at the USGS California Water Center.
River, snow, precipitation, temperature, freezing levels, water temperature and more is available at the National Weather Service’s California-Nevada River Forecast Center.
View maximum temperature, minimum temperature, dew point, wind speeds, precipitation and more.
Multiple satellite views for the West Coast.
For more on weather conditions …
- Click here for the California Data Exchange Center (CDEC) webpage for weather conditions.
- Click here for the National Weather Service, Sacramento web page.
CLIMATE AND DROUGHT
Get long term precipitation and temperature data and more at this climate montioring and data access website sponsored by the California Energy Commission, the Scripps Institute of Oceanography and the Western Regional Climate Center.
View precipitation data for Western states.
The U. S. Drought Monitor is published every Thursday. Click on the image to view the latest map.
The Quick Drought Response Index (QuickDRI) is a shorter-term indicator of dryness. QuickDRI is designed to provide a snapshot of anomalously dry or wet conditions over the past 4 weeks and serves as an indicator of emerging or rapidly changing drought conditions.
Groundwater and soil moisture drought indicators are generated weekly based on terrestrial water storage observations derived from GRACE-FO satellite data and integrated with other observations, using a sophisticated numerical model of land surface water and energy processes.
Produced every two weeks, the maps provide regional to sub-county scale information about drought’s effects on vegetation, integrating satellite-based observations of vegetation conditions, climate data, and other biophysical information such as land cover/land use type, soil characteristics, and ecological setting.
30-day forecast for temperature and precipitation.
Tool from the Natural Resources Conservation Service to forecast water supply by river basin.
See the wildfire outlook for the current month, the month following and a seasonal look at the two months beyond that.
This page updated 4/2/2020.