Washington drought no longer ‘extreme’
The drought is losing its grip on Washington, with the “extreme” conditions that reigned over most of the state last summer now completely gone, the U.S. Drought Monitor reported Thursday.
A week earlier, one-third of Washington was in extreme drought, the second-worst drought classification. The area, all or parts of 20 counties east of the Cascades, was downgraded to “severe drought.”
For the first time since the last week of April, a majority of the state, 52 percent, is not suffering any level of drought.
Drought conditions are probably yielding faster than reflected in the weekly reports, Washington State Assistant Climatologist Karin Bumbaco said. “The (drought monitor) map’s a little worse than what’s on the ground,” she said.
The U.S. Climate Prediction Center reaffirmed Thursday that El Nino can be expected to eventually exert influence over the West, making the Northwest warm and California wet.
The prediction center estimated the Northwest has a 60 percent chance of a warmer than average January, February and March, which could reduce the amount of melting snow during the irrigation season.
So far, however, a wave of Pacific storms unrelated to El Nino has softened the West’s drought.
Drought conditions also have improved in Oregon and Idaho, and slightly in California, according to the drought monitor, a partnership between the U.S. Department of Agriculture, National Oceanic and Atmospheric Administration and the University of Nebraska-Lincoln.
Another wave of precipitation is expected before Christmas.
The Climate Prediction Center on Friday warned that Western Washington and Western Oregon, and portions of Northern and Central California will receive heavy rains at low elevations and heavy snow at higher elevations between Dec. 21 and 24.
Heavy snow is expected in the Idaho Panhandle during the same time period.
Paltry snowpacks triggered Washington’s 2015 drought, which deepened during a record-hot spring and summer.
At the peak in late August, extreme drought enveloped 85 percent of the state,
The drought has gradually weakened since October. The inflow into the five Yakima River Basin reservoirs has been 199 percent of average since the water year began, Oct. 1, according to the U.S. Bureau of Reclamation.
The reservoirs, which provide irrigation water for the state’s most-valuable farm region, were 50 percent full Friday, or 126 percent of normal levels.
Most of the state received 200 to 400 percent as much precipitation as usual during the first 17 days of December, Bumbaco said. “It’s hard for me to say that’s going to change before the end of the month.”
December temperatures statewide have been 3 to 6 degrees above normal so far. Still, early season snowpacks are encouraging. The Olympic Mountains, North Cascades, and Upper Columbia and Lower Yakima basins were all well above normal Friday, according to the Natural Resources Conservation Service.
The percentage of Oregon in extreme drought dropped to 46 percent from 59 percent. The percentage of the state in some level of drought declined to 88 percent from 90 percent.
Oregon snowpacks were above average Friday in most basins.
Extreme drought conditions are almost gone in Idaho, dropping to 1 percent from 8 percent the week before, according to the drought monitor. Extreme conditions in Idaho peaked at 29 percent of the state in August and September.
Idaho snowpacks are near or above normal. Snowpacks in Southern Idaho are off to a particularly strong start.
In California, conditions improved in the northwest corner of the state, as the percentage of California in severe drought dropped to 21 percent from 23 percent. Some 97 percent of the state remains in some level of drought, including 45 percent in “exceptional drought,” the worst classification.
California snowpacks are 75 to 80 percent of normal, according to the state Department of Water Resources.