Columbia Basin Seasonal Precipitation Division Averages  
    Northwest River Forecast Center 


    (Weekly Summary: 12Z jan 1 - 30, 2012) 

     DIVISION               ..JAN TO DAY 30..   ....OCT - JAN.... 
                             OBSD  DEP  PCT AV    OBSD   DEP  PCT AV 

    COLUMBIA ABOVE COULEE   3.38   0.76 129.    10.37   0.00 100. 
    SNAKE RV AB ICE HARBOR  2.58   0.66 134.     6.78  -0.19  97. 
    COLUMBIA AB THE DALLES  3.42   0.72 127.     9.95  -0.22  98. 
    COLUMBIA AB CASTLEGAR   4.78   0.89 123.    14.37  -0.63  96. 
    KOOTENAI                3.03   0.35 113.     9.90  -0.88  92. 
    CLARK FORK              2.50   0.78 145.     7.22   0.79 112. 
    FLATHEAD                2.91   0.73 134.     8.52  -0.19  98. 
    PEND OREILLE/ SPOKANE   4.23   0.48 113.    12.81  -1.45  90. 
    NORTHEAST WASHINGTON    1.88   0.08 104.     6.65  -0.90  88. 
    OKANOGAN                1.80   0.12 107.     6.11  -0.33  95. 
    EAST SLOPES WASH CASC.  7.32   0.85 113.    19.77  -3.24  86. 
    CENTRAL WASHINGTON      0.95  -0.08  92.     2.33  -1.86  56. 
    UPPER SNAKE             2.66   0.49 122.     7.88   0.10 101. 
    SNAKE RIVER PLAIN       1.88   0.77 170.     4.64   0.57 114. 
    OWYHEE/ MALHEUR         1.97   0.76 163.     3.83  -0.55  88. 
    SALMON/ BOISE/ PAYETTE  3.39   0.98 141.     8.27  -0.42  95. 
    BURNT/ GRANDE RONDE     1.99   0.20 111.     5.70  -1.06  84. 
    CLEARWATER              4.40   0.90 126.    12.09  -0.73  94. 
    SOUTHEAST WASHINGTON    2.38   0.21 110.     6.37  -2.18  75. 
    UPPER JOHN DAY          2.36   0.80 151.     5.17  -0.86  86. 
    UMATILLA/ LWR JOHN DAY  2.84   0.98 153.     5.84  -1.25  82. 
    UPR DESCHUTES/ CROOKED  2.87   0.83 141.     6.07  -0.93  87. 
    HOOD/ LOWER DESCHUTES   6.44   2.26 154.    15.96   0.70 105. 
    NW SLOPE WASH CASCADES 13.80   1.55 113.    40.50  -6.12  87. 
    SW WA CASCADES/COWLITZ 10.99   1.01 110.    31.63  -6.02  84. 
    WILLAMETTE VALLEY      12.47   4.17 150.    28.22  -3.13  90. 
    ROGUE/ UMPQUA           7.87   2.92 159.    16.33  -2.68  86. 
    KLAMATH BASIN           2.89   0.16 106.     6.44  -2.94  69. 
    LAKE COUNTY-GOOSE LAKE  1.93   0.55 140.     3.88  -1.21  76. 
    HARNEY/ MALHEUR BASIN   1.64   0.49 143.     3.91  -0.53  88. 

    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.