In summer 2011, the South was in the grip of one of the worst droughts on record. Many parts of New Mexico and western Texas have received a small fraction of their normal rainfall over the past 10 months.
All but a handful of weather stations across Alaska reported well below-normal precipitation in May 2011, placing that month in a statistical tie with May 1974 as the driest May since records began in 1918.
TreeFlow is a comprehensive web resource for tree-ring reconstructions of streamflow and climate, providing easy access to reconstruction data as well as information about how the data were developed, and can be used. Originally developed by researchers at the Climate Assessment for the Southwest, TreeFlow has a growing collection of tree ring constructions for river basins throughout the Western United States.
Arizona DroughtWatch is a tool designed by the Climate Assessment for the Southwest to collect, summarize, and display timely observations of drought impacts across Arizona. The tool was developed to support drought monitoring efforts spearheaded by county-level Local Drought Impact Groups organized in support of the Arizona State Drought Preparedness Plan.
The longest instrumental climate records date back only about 100 years in the Southwest, a timeframe that likely does not capture the full range of climate variability. Extending the record to earlier times provides additional information on the length and severity of past droughts. This tool created by the Climate Assessment for the Southwest allows users to visualize the climate variability during the past 1,000 years or so in each climate division in Arizona and New Mexico.