An expert on climate conditions and food security explains why some parts of East Africa are so vulnerable to climate shocks like the ongoing drought.

Few winter storms and El Niño conditions brought severe drought conditions to the Hawaiian Islands this past year.

El Niño is a global phenomenon. Guest blogger Dr. Andrew Watkins shines some light on El Niño's impact across the world in Australia.

According to NOAA’s Spring Outlook released today, rivers in western New York and eastern New England have the greatest risk of spring flooding in part because of heavy snowpack coupled with...


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

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.

Paleoclimate Reconstructions for the Southwest

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.