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Published April 27, 2011
Arizona Drought Status(through 4/19/11)
Data Source(s): U.S. Drought Monitor
A few storms passed through Arizona during the past 30 days, but they brought little precipitation to the southern region where precipitation deficits and drought classifications are the highest. According to the April 19, 2011, update of the National Drought Monitor, drought conditions increased and intensified over much of southern Arizona. Severe drought expanded north through Graham, Greenlee, and southern Apache counties, while extreme drought expanded westward through Santa Cruz and eastern Pima counties. Currently, about 50 percent of Arizona is classified with moderate, severe or extreme drought, including about 12 percent as extreme (Figures 5a–b), twice the area of a month ago. Severe drought expanded by about 10 percent statewide over the same period.
Drought impact reports submitted through AZ DroughtWatch (http://azdroughtwatch.org) indicate that short-term impacts such as stressed vegetation and ecosystems are emerging due to the lack of winter precipitation. Range conditions and livestock water resources are also reported as being impacted by extreme drought conditions in the southeast part of the state.Notes:
The Arizona section of the U.S. Drought Monitor is released weekly (every Thursday) and represents data collected through the previous Tuesday. The maps are based on expert assessment of variables including (but not limited to) the Palmer Drought Severity Index, soil moisture, streamflow, precipitation, and measures of vegetation stress, as well as reports of drought impacts. It is a joint effort of several agencies.
For the most current drought status map, visit:
For monthly short-term and quarterly long-term Arizona drought status maps, visit:
Southwest Climate Outlook Staff
- Michael Crimmins, UA Extension Specialist
- Stephanie Doster, Institute of the Environment Editor
- Dan Ferguson, CLIMAS Program Director
- Gregg Garfin, Founding Editor, Institute of the Environment
- Zack Guido, CLIMAS Associate Staff Scientist
- Gigi Owen, CLIMAS Assistant Staff Scientist
- Nancy J. Selover, Arizona State Climatologist
- Jessica Swetish, CLIMAS Publications Assistant
Please direct your Southwest Climate Outlook comments and suggestions to Zack Guido.
The CLIMAS Web site contains official and non-official forecasts, as well as other information. While we make every effort to verify this information, please understand that we do not warrant the accuracy of any of these materials.... Read full disclaimer