As a result of high growth rates, physically and legally limited water supplies, drought, economic constraints, and relatively little comprehensive water resource planning and management, water supplies are stressed in some parts of Arizona. The Arizona Department of Water Resources has collected and synthesized currently available water-related information for the State of Arizona into a “water atlas,” organized by planning area.

The purpose of the Inventory is to determine whether storage facilities exist in this state to meet the water storage needs of the authority for the following ten years. The Authority approved the initial Inventory in 1997. Because additional storage facilities are continually being constructed, the Authority updates the Inventory at least once every five years. The Authority has been annually updating all new facilities that could be utilized by the Authority in its Annual Report. It is important to note that the primary purpose of the Inventory is to identify the capacity that is available for potential storage by the Authority to meet its objectives. The inclusion of a facility in the Inventory does not equate to a commitment by the Authority that the facility will be utilized for water banking purposes in the future. The Authority will continue to determine annually which facilities will be used through the development of an Annual Plan of Operation. Conversely, a facility that is not included in the Inventory may be utilized in a future Annual Plan of Operation.

Research into the sensitivity and vulnerability of urban water systems in Arizona reveals that managers are more concerned about factors such as population growth projections, economic trends, and revenue flows. Reliance on groundwater resources in many cases obscures recognition of any direct impact of precipitation on water supply. Given the low level of perceived climate risk among many providers interviewed for this study, it would seem unlikely that climate information would be needed. However, pockets of sensitivity and vulnerability to climatic impacts do exist in the four study areas covered in this study.

The study had three main goals: (1) to assess the vulnerability of groundwater-dependent agriculture to climate variability, (2) to identify historical and current processes of adaptation to the vagaries of climate in the region— these refer to both system wide adaptations and individual farmer’s adaptations, and, (3) to assess the use of and needs for seasonal climate forecast information in agricultural decision making. The report is targeted at institutional stakeholders (i.e., agricultural extension personnel), physical scientists (particularly climatologists), and policymakers (at the level of NOAA and other federal agencies). Specific recommendations are made to these groups in order to improve the delivery of seasonal forecasts, set research priorities, and inform public policy.

Conventional wisdom often views the urban water sector as being among the more sensitive sectors in the arid U.S. Southwest. To test this assumption, the Climate Assessment Project for the Southwest analyzed the water budgets of five Arizona cities to determine how severe the impacts would be from the deepest one-, five-, and ten-year droughts on record. Case study sites for the analysis included the Phoenix Active Management Area, Tucson Active Management Area, Santa Cruz Active Management Area, and the Benson and Sierra Vista subwatersheds of the San Pedro River.

The information presented here highlights the findings of a drought history study in support of the Governor's Drought Task Force activities, such as determining triggers for drought mitigation and response actions, based on observed hydroclimatic and other information. The material is intended to provide the relevant climatology background for non-specialists, and it is presented in a top ten or frequently asked question format. The questions and answers cover the major climate-related aspects of drought including long-term averages, seasonality, interannual and long-term spatial and temporal drought variations, extremes, and causes of climatic variability. The answers to each question include bulleted Quick Answers followed by a concise explanation of more detailed information. Example figures are presented within the text.

Weather conditions in Arizona can find you driving in sunny, moderate climates of the low desert to ice and snow of the mountain regions in a couple of hours. The Arizona Department of Transportation wants to make sure that your travel throughout the state is safe and enjoyable, no matter what the climate. We offer the enclosed winter driving information to ensure that you save the slipping and sliding for the slopes and not the roadways.