From the Boulder Weekly (Tommy Wood):
Colorado River below average despite strong El Nino
Water levels and rainfall for the Colorado River basin were below-average in January and February, and will remain so until at least July 2016, according to data from the U.S. Bureau of Reclamation.
The basin is at only 61 percent of its seasonal average. Likewise, inflow into Lake Powell and Lake Mead is also below the seasonal average. These numbers come as a disappointment after many experts predicted that this year’s El Nino, which is one of the strongest on record, would increase precipitation in the American Southwest and help alleviate the crippling drought there. El Nino is part of a cyclical fluctuation of temperatures in the south Pacific Ocean. It’s generally accompanied by an increase in rain and snowfall in the southwestern United States. Meteorologists called this year’s El Nino the “Godzilla El Nino” because of its size and its potential to quench droughts in California, New Mexico, Arizona, Colorado and Nevada.
Instead, that precipitation has been largely missing, and the drought has only gotten worse in the Colorado River basin. The U.S. Department of the Interior reported that the water levels of Lake Mead, which is filled by the Colorado River and provides water to much of California, Arizona and Nevada, have dropped 121 feet since 2001.
Likewise, that same period has been the driest stretch for the Colorado River in at least the past 100 years.
March and April are traditionally snowy months in the region, so there’s a chance that this year’s El Nino could still offer some drought relief, but so far, the returns haven’t been promising.