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). 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. (National Weather Service) Below are the National. 27 shows 1-2 inches in green, 2-4 inches in yellow, 4-6 inches in orange, and above 6 in red and pink. The visualization consists of two primary graphs both of which show the range of historical values for precipitation. A map of 7-day rainfall totals as of Dec. Data from the CDEC website appears to be updated at around 8:30am PST each day. These stations are tracked because they provide important information about the state’s water supply (most of which originates from the Sierra Nevada Mountains). There are three sets of stations that are tracked in the data and these plots: Other California water-related visualizations include reservoir levels in the state as well. I used data for California rainfall totals from the California Department of Water Resources. This year has been a relatively dry year and wanted to visualize how this year compares with historical levels for this time of year. It’s winter in California and that means the rainy season (snowy in the mountains). How do current California rainfall and precipitation totals compare with Historical Averages?Ĭheck out the California reservoir dashboard. The atmospheric river that drenched the Bay Area over three days this week boosted the regions rain totals, but most areas still lag below normal for the Oct.

Rainfall totals bay area