Google Earth is an application requiring a fast internet connection and
a modern computer. Be sure to check if your system matches the
requirements outlined by
2) Download and install the
Google Earth application. If you have
any problems, the
Google Earth Support webpage is full of useful information. Do note
that alternatives to Google Earth exist, such as NASA's
WorldWind and ESRI's
ArcExplorer, both of which are free.
3) Load the water supply forecast ".kmz" data file from the link
below. The application may automatically launch on opening the file.
Link to Latest Forecasts
4) Browse around or zoom into your basin of interest. Click
individual sites for more info, both on the map and in the "Places"
frame on the left. Use the "Places" frame to find a specific water
supply forecast, organized by hydrologic region.
5) Any day you use this application, come to this webpage and click
on the above links to the data files. Important! If you save the “.kmz”
file locally to your computer, it will only contain the data from the
day you acquired it and will not automatically refresh. To ensure you
have the latest data, always come back to this webpage. Text at the
bottom of the window that appears on clicking a station will indicate
both the nominal issue date of the forecast, the creation of the
forecast data file and the date the kml file, itself, was created.
A Note About Precision:
Most of the location information of the gages is obtained from the
US Geologic Survey whereas others comes from NRCS records. Often,
reservoir inflow forecasts are displayed at the outlet of the dam.
No guarantee is made on the accuracy of the location of the gages.
However, if you are aware that a station is displayed in the wrong
location, you are encouraged to contact the
content manager of this
A Note About the Data:
This data comes from an automated processing of the operational
forecast archive of the NRCS National Water and Climate Center
hydrologists. The values in the files are generally considered to be
identical to the official published forecasts, although there is no
guarantee associated with this data and the
Supply Outlook Reports remain the official source of the
forecasts. If a value appears in this file and not the Outlook
Reports, it is likely unintentional and the value in this file
should be disregarded. These values are subject to change,
especially the most recent file during the first month of its