Forecast Discussion for SEW NWS Office
000
NOUS46 KSEW 062003
PNSSEW

Washington Precipitation Summary
National Weather Service Seattle WA
1203 PM PST Wed Dec 6 2017

For November, all of Washington state saw above to much above normal
precipitation.  Combined with the precipitation received in October,
the water year remains near to above normal.  And with only one
month left in 2017, it seems that most have received near to above
normal precipitation for the year as well.

In western Washington, the monthly percentage of normal for
precipitation ranged from 114 percent on the western slopes of the
Cascade to 167 percent in the Olympics.  The greatest amount of
precipitation at the climate stations for the mountains, coast and
interior lowlands was 25.74 inches at Forks in the Olympics, 20.94
at Aberdeen, and 21.93 inches at Grays River in the Southwest
Interior.

For eastern Washington, the percentage of normal for precipitation
ranged from 112 percent in the Okanogan region to 144 percent in the
Central Basin.  The greatest amount of precipitation at climate
stations for the mountains and lowlands was 11.33 inches at Stehekin
in the eastern slopes of the Cascades, and 3.43 at Bickleton in the
Central Basin.

The outlook for December and beyond for Washington state, for the
next two weeks the outlook is for below normal precipitation.  The
monthly outlook for December also calls for below normal
precipitation.  The three month outlook for December through
February is calling for above normal precipitation for the state.

The table below gives precipitation figures as a percent of normal
for regions of Washington.  The current water year began 1 October
2017 and ends 30 September 2018.

                       November   Water year      Past 3       Past 12
                         2017       to date       months        months
Western Washington
  Coast                   140          123          120           114
  Olympics                167          140          132           106
  Northwest Interior      119          124          115           104
  Puget Sound Lowlands    143          136          128           120
  Southwest Interior      134          133          129           118
  West Foothills Casca    116          128          120           111
  Cascades West           114          126          118           113

Eastern Washington
  East Slopes Cascades    114          134          126           114
  Okanogan                112          109           98           108
  Central Basin           144          141          130           125
  Northeast               122          116          113           107
  Palouse and Blue Mtn    138          136          126           121



The table below expresses precipitation in inches and as a percent of
normal for a variety of locations around the state.  Occasionally
missing data at a site are estimated using observed data from
surrounding stations.

                   November           Water year       Past 12 months
                Inches    Pct       Inches    Pct       Inches    Pct

Quillayute       19.91    128        27.17    104       111.69    138
Hoquiam          16.47    147        23.77    134        79.04    141
Bellingham        7.04    121        12.38    131        39.74    138
Seattle           8.63    131        13.43    134        46.31    141
Olympia          12.28    142        18.86    143        60.92    140
Longview*        10.31    134        16.79    143        56.12    134

Concrete         14.48    120        24.33    128        76.13    127
Snoqualmie Fall  11.85    117        18.96    120        64.86    121
Randle*          11.92    116        20.05    128        63.62    128
Diablo Dam       15.20    103        25.57    111        76.29    115
Stampede Pass    16.67    114        29.15    130       102.02    137
Paradise         23.17    114        39.67    129       130.90    125

Winthrop          2.50    120         4.41    139        16.18    119
Stehekin         11.33    164        15.52    151        45.13    144
Leavenworth       3.98     88         6.21     95        25.39    111
Mount Adams      10.24    132        18.03    154        62.73    149
Wenatchee         1.40    101         2.21    116         9.70    111
Yakima            1.25    119         2.04    128        10.86    139

Coulee Dam        1.50    115         2.23    113        12.58    130
Lind              2.04    149         3.26    150        12.81    144
Republic          2.30    126         2.96    105        18.01    116
Spokane           2.88    125         4.28    123        20.95    136
Pullman           3.02    163         5.50    141        22.66    120
Dayton            3.14    116         4.55    108        21.77    122

* = Estimated

$$

Grub

NWS SEW Office Area Forecast Discussion