A series of storm systems tracking across the northern tier basins brought above normal precipitation to Southern British Columbia, Washington, Northern Idaho, and Western Montana. South of the main storm track, precipitation remained below normal across much of Oregon and Southern Idaho.
June precipitation was: 97 percent of normal (1971-2000) at Columbia above Coulee, 80 percent of normal at the Snake River above Ice Harbor, and 89 percent at Columbia above The Dalles.
Seasonal (october through june), precipitation was: 102 percent of normal (1971-2000) at Columbia above Coulee, 89 percent of normal at the Snake River above Ice Harbor, and 98 percent at Columbia above The Dalles.
Daily precipitation records established in June included 0.82 inches at Missoula on the 9th and 0.68 inches at Salem, 0.79 inches at Sea-Tac Airport, 0.91 inches at Portland, 1.01 inches at Olympia, and 1.48 inches at Astoria on the 28th.
The 31 station temperature index for the Pacific Northwest departed +1.3 degrees from normal relative to the 1971-2000 normals. Mean temperature departures ranged from -1.6 to 2.5 degrees.
New high temperature records established in June included 82 at Astoria, 86 at Olympia, 89 at Eugene, and 93 at Portland and Salem(tie) on the 12th, 94 at Olympia and Sea-Tac Airport and 97 at Portland on the 13th, 89 at Olympia on the 25th, and 99 at Yakima and Pocatello(tie) on the 26th.
New low temperatures records tied or broken in June included 35 at Yakima and Spokane(tie) and 36 at Pendleton Airport on the 7th, 42 at Sea-Tac Airport on the 8th, 30 at Klamath Falls(tie) on the 9th, 33 at Pocatello on the 10th, and 33 at Klamath Falls on the 19th.