The ongoing drought in California and other parts of Southwestern United States has been reported extensively by newspapers and government sites.
Although rainfall deficit is technically meteorological drought, and drought could be of several other types (such as hydrological, agricultural, etc.), the attempt here is to demonstrate the use of R in the analysis of high resolution rainfall data. Using 4-km rainfall data from the PRISM Climate Group for 1895-2013, the total for 2013 is compared with the long-term and near-term historical averages.
This effort is part of The Rain Project and the entire code is available on GitHub https://github.com/RationShop/rain_prism
Any comments or help appreciated.