The committee released a report last week showing statewide drought conditions worsened during March.
The continued dryness led to drought declarations on the Navajo Nation and in Yuma County.
Though a series of weak storms passed through Arizona, they left only insignificant snow, according to the report.
The southern half of the state remained dry and northern Arizona received only scattered light precipitation.
Water in the Colorado River is generated by snowmelt runoff from mountain ranges as far away as Wyoming and Colorado.
The Colorado River system, which provides Arizona with about 40 percent of its water supply, has experienced severe drought conditions since 2000.
Forecasters also predict runoff into Lake Powell, which supports the Upper Basin states north of Arizona’s Lee’s Ferry — Colorado New Mexico, Utah and Wyoming — will be only 43 percent of normal this year.
ADWR reported this year’s projection for in-flow into Lake Powell is 3.1 million acre-feet, less than half its average 7.1 million acre-feet.
An acre-foot of water is 325,851 gallons, enough to cover an acre of land with a foot of water.
BuRec’s Colorado River Simulation System model also increased the probability of shortage in 2020 by 7 percent, in 2021 by 13 percent and in 2022 by 11 percent.