Introduction

Precipitation in the San Joaquin Valley is highly variable, both seasonally, and from year to year.  Precipitation patterns had a significant influence on the restoration response of various trials and on native plant propagation activities that were conducted at a field nursery near Tranquillity. We have summarized precipitation data for the Tranquillity area from 1997 through 2008. This period includes the course of the Land Retirement Demonstration Project (1997-2005) and the duration of native plant propagation activities (2001-2008). Precipitation data were compiled from the Westlands weather station (CIMIS Station #105). Data for the 30-year mean were compiled from four, nearby NOAA stations.