Western United States: Deficit impacts continue into Sept 2015

Composite water anomaly index map for the next six months (April - Sept 2015).

Composite water anomaly index map for the next six months (April - Sept 2015).

The prolonged drought in California has garnered significant political, public, and media attention. The map depicts the composite water anomaly index for the next six months (April-Sept 2015).  Substantial deficits will persist or intensify throughout much of the region, including Oregon, Washington, Nevada, Idaho, Utah, and Arizona.  The multi-year regional drought is already impacting agriculture, electricity generation, domestic supplies, and real-estate development.

This blog post presents results from our April “WSIM Global Water Monitor and Forecast” report. This report is based on observed temperature and precipitation through March 2015 and an ensemble of 28 temperature and precipitation forecasts issued by NOAA's CFSv2 the last week of March 2015.