and streamflow forecasts are below average across most of the Columbia Basin,
with those conditions being particularly pronounced in southern and
southeastern Oregon, according to a Thursday water supply briefing from the
Northwest River Forecast Center in Portland.
Ryan Lucas reported that water supply projections through September are 79 to
107 percent of average in Columbia River basins above Grand Coulee Dam; 61 to
95 percent in the Upper Snake, Westside Cascades and eastern Washington basins;
and a withering 36 to 66 percent of average in southeastern Oregon.
delivered above-average temperatures across most of the basin, but Lucas said,
“The first few days of February we’ve seen this trend toward cooler weather.”
a long-predicted El Nino weather pattern has yet to emerge from the Pacific
Ocean, NOAA’s Climate Prediction Center maintains there is a 65 percent chance
of a weak El Nino taking shape over the next couple months. For that reason,
the CPC’s three-month outlook calls for warmer and drier-than-average weather
in the Pacific Northwest. However, February is projected to be colder than
average in the region.
could boost snowpack numbers that are lagging as of this week: 82 percent of
average in the Pend Oreille basin; 75 percent in the Kootenai; 90 percent in
the Columbia River above Canada’s Arrow Dam; 83 percent above Grand Coulee Dam;
93 percent in the Snake River Basin above American Falls; 88 percent in the
Snake above Hell’s Canyon; 85 percent in the Snake above Ice Harbor, and 83
percent in the Columbia above The Dalles Dam, where current river flows are 81
percent of average.
in the Cascades is 88 percent of average in the Skagit River Basin; 70 percent
in the Cowlitz; 70 percent in the Willamette basin; and 75 percent in the Rogue