The data is processed in javascript and visualized here using HTML, CSS and javascript and the open source Plotly javascript graphing library. Data is sorted alphabetically by station and then listed. These daily summaries provide a cumulative precipitation estimate from 1200GMT yesterday to 1200 GMT (daily) or 1200 GMT 7 days ago to 1200 GMT today (weekly). You can hover (or click) on the graph to audit the data a little more clearly.ĭata is downloaded from the California Data Exchange Center website of the California Department of Water Resources using a python script. Data from the precipitation database are currently available to the public in Microsoft Excel format. It also shows the present precipitation level and its percentile within the historical data for the day of the water year. You can see the current water year plotted on this to show how it compares to historical values. The second graph shows the percentiles of precipitation over the course of the historical water year, spreading out like a cone from the start of the water year (October 1). Click individual images for larger version click again or use arrow keys to step through the images. The top graph is a histogram of water year precipitation totals on the specified date (in blue) as well as the precipitation total for the current water year in red. These preliminary observed rainfall graphics are automatically updated every 6 hours to show the latest 6-, 12-, 18-, and 24-hour rainfall totals for standard periods. ![]() ![]() The visualization consists of two primary graphs both of which show the range of historical values for precipitation. The top graph is a histogram of water year precipitation totals on the specified date (in blue) as well as the precipitation total for the current water year in red.
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