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Precipitation Weekly Update Monthly Seasonal Summary Index Inputs Precipitation Temperature Snow Runoff Forecast Information Forecasts Peakflow Verification Descriptive Information Summary Schedule Fcst Locations Publications Return Main Menu |
Click on date to display a different weekly forecast: Columbia Basin Seasonal Precipitation Division Averages Northwest River Forecast Center (Weekly Summary: 12Z apr 1 - 27, 2009) DIVISION ..APR TO DAY 27.. ....OCT - APR.... OBSD DEP PCT AV OBSD DEP PCT AV COLUMBIA ABOVE COULEE 1.16 -0.33 78. 14.80 -0.94 94. SNAKE RV AB ICE HARBOR 1.25 -0.06 95. 12.07 0.46 104. COLUMBIA AB THE DALLES 1.35 -0.13 91. 15.49 -0.28 98. COLUMBIA AB CASTLEGAR 1.57 -0.23 87. 20.03 -2.15 90. KOOTENAI 1.29 -0.29 82. 14.40 -1.76 89. CLARK FORK 0.65 -0.46 58. 11.31 1.20 112. FLATHEAD 1.07 -0.35 75. 12.92 -0.68 95. PEND OREILLE/ SPOKANE 1.50 -0.53 74. 20.62 -1.61 93. NORTHEAST WASHINGTON 0.92 -0.45 67. 10.44 -1.75 86. OKANOGAN 0.66 -0.27 71. 8.50 -1.39 86. EAST SLOPES WASH CASC. 1.50 -0.41 79. 29.78 -3.74 89. CENTRAL WASHINGTON 0.33 -0.25 57. 5.60 -0.89 86. UPPER SNAKE 2.19 0.75 152. 15.08 2.30 118. SNAKE RIVER PLAIN 0.96 0.03 103. 6.65 -0.40 94. OWYHEE/ MALHEUR 0.76 -0.11 87. 7.12 -0.30 96. SALMON/ BOISE/ PAYETTE 0.95 -0.49 66. 12.46 -1.75 88. BURNT/ GRANDE RONDE 0.86 -0.36 70. 10.86 0.02 100. CLEARWATER 1.42 -0.97 59. 23.14 2.14 110. SOUTHEAST WASHINGTON 0.96 -0.54 64. 14.22 0.23 102. UPPER JOHN DAY 1.12 -0.01 99. 9.21 -0.60 94. UMATILLA/ LWR JOHN DAY 1.21 -0.14 89. 12.66 0.96 108. UPR DESCHUTES/ CROOKED 0.77 -0.11 88. 10.21 -0.62 94. HOOD/ LOWER DESCHUTES 1.94 0.01 100. 26.16 2.71 112. NW SLOPE WASH CASCADES 5.70 0.10 102. 62.79 -8.27 88. SW WA CASCADES/COWLITZ 3.90 -0.91 81. 50.82 -7.47 87. WILLAMETTE VALLEY 3.20 -1.15 74. 40.52 -9.10 82. ROGUE/ UMPQUA 1.13 -1.37 45. 25.11 -5.22 83. KLAMATH BASIN 0.73 -0.39 65. 12.37 -2.39 84. LAKE COUNTY-GOOSE LAKE 0.79 -0.26 75. 6.37 -2.33 73. HARNEY/ MALHEUR BASIN 0.70 -0.26 73. 6.25 -1.37 82. This precipitation summary for the Columbia River Basin is based on an analysis using a limited number of reporting stations. Final values depicted in this narrative are prorated by the number of elapsed days in the month. Precipitation normals are based on 1971-2000 historical data. Please contact NWRFC for further information: (503) 326-7291.
Click on date to display forecast: Columbia Basin Seasonal Precipitation Division Averages Northwest River Forecast Center (Monthly Summary - apr 2009) DIVISION ..APR TO DAY 30.. ....OCT - APR.... OBSD DEP PCT AV OBSD DEP PCT AV COLUMBIA ABOVE COULEE 1.00 -0.65 61. 14.65 -1.25 92. SNAKE RV AB ICE HARBOR 1.46 0.00 100. 12.28 0.53 104. COLUMBIA AB THE DALLES 1.41 -0.23 86. 15.55 -0.38 98. COLUMBIA AB CASTLEGAR 1.14 -0.86 57. 19.60 -2.78 88. KOOTENAI 0.99 -0.76 57. 14.11 -2.23 86. CLARK FORK 0.68 -0.56 55. 11.34 1.11 111. FLATHEAD 1.03 -0.55 65. 12.88 -0.88 94. PEND OREILLE/ SPOKANE 1.77 -0.49 78. 20.88 -1.57 93. NORTHEAST WASHINGTON 1.02 -0.50 67. 10.55 -1.79 85. OKANOGAN 0.67 -0.36 65. 8.52 -1.48 85. EAST SLOPES WASH CASC. 1.63 -0.49 77. 29.91 -3.82 89. CENTRAL WASHINGTON 0.45 -0.19 71. 5.73 -0.82 87. UPPER SNAKE 2.42 0.82 151. 15.30 2.36 118. SNAKE RIVER PLAIN 1.12 0.08 108. 6.81 -0.34 95. OWYHEE/ MALHEUR 0.90 -0.07 93. 7.26 -0.26 97. SALMON/ BOISE/ PAYETTE 1.06 -0.54 67. 12.58 -1.79 88. BURNT/ GRANDE RONDE 1.10 -0.26 81. 11.09 0.12 101. CLEARWATER 2.06 -0.60 77. 23.78 2.51 112. SOUTHEAST WASHINGTON 1.43 -0.24 85. 14.68 0.53 104. UPPER JOHN DAY 1.19 -0.06 96. 9.29 -0.65 93. UMATILLA/ LWR JOHN DAY 1.47 -0.03 98. 12.93 1.08 109. UPR DESCHUTES/ CROOKED 0.93 -0.05 95. 10.37 -0.56 95. HOOD/ LOWER DESCHUTES 2.82 0.67 131. 27.04 3.37 114. NW SLOPE WASH CASCADES 6.26 0.04 101. 63.35 -8.33 88. SW WA CASCADES/COWLITZ 5.01 -0.34 94. 51.93 -6.89 88. WILLAMETTE VALLEY 4.08 -0.76 84. 41.40 -8.71 83. ROGUE/ UMPQUA 1.55 -1.23 56. 25.53 -5.07 83. KLAMATH BASIN 0.88 -0.36 71. 12.52 -2.37 84. LAKE COUNTY-GOOSE LAKE 0.87 -0.30 74. 6.44 -2.37 73. HARNEY/ MALHEUR BASIN 0.85 -0.21 80. 6.41 -1.32 83. Columbia River Basin division values are computed by utilizing un-weighted precipitation amounts from key stations in each area. Precipitation normals are based on 1971-2000 historical data. Please contact NWRFC for further information: (503) 326-7291. NORTHWEST RIVER FORECAST CENTER PORTLAND OR
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