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NOUS46 KSEW 141938
PNSSEW

Washington Precipitation Summary
National Weather Service Seattle WA
1238 PM PDT Wed Sep 14 2022

August brought below normal precipitation for all the regions of
Washington state.  As we get into the last month of the current
Water Year, all of Washington remains near to above normal.

For Western Washington, the monthly percentage of normal for
precipitation ranged from 5 percent in the western foothills of the
Cascades to 19 percent in the Olympics.  The greatest amount of
precipitation at the climate stations for the mountains, coast and
interior lowlands was 0.53 inches at Forks in the Olympics, 0.50 at
Quillayute, and 0.34 inches at Clearbrook in the Northwest Interior.

For Eastern Washington, the percentage of normal for precipitation
ranged from 25 percent in the Central Basin to 58 percent on the
eastern slopes of the Cascades.  The greatest amount of
precipitation at the climate stations for the mountains and lowlands
was 0.97 inches at Winthrop on the eastern slopes of the Cascades,
and 0.85 at Republic in the Northeast region.

The outlook for September and beyond for Washington state, for the next
two weeks the outlook is for below normal precipitation.  The monthly
outlook for September calls for below normal precipitation for the
eastern half of the state, while equal chances of above, below and
near normal precipitation is forecast for the western half.  The
three month outlook for September through November calls for above
normal precipitation for much of Washington state, with equal
chances of above, below and near normal precipitation for the
southeastern corner.

The table below gives precipitation figures as a percent of normal
for regions of Washington.  The current water year began 1 October
2021 and ends 30 September 2022.

                         August   Water year      Past 3       Past 12
                          2022      to date       months        months
Western Washington
  Coast                    15          121          100           124
  Olympics                 19          115           74           118
  Northwest Interior       16          126           91           131
  Puget Sound Lowlands      6          115           98           118
  Southwest Interior        6          119          119           122
  West Foothills Casca      5          116           98           118
  Cascades West             6          121          106           123

Eastern Washington
  East Slopes Cascades     58          110          122           111
  Okanogan                 34          101          184           104
  Central Basin            25          103          160           106
  Northeast                51           97          125            98
  Palouse and Blue Mtn     51          124          200           125

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.

                     August           Water year       Past 12 months
                Inches    Pct       Inches    Pct       Inches    Pct

Quillayute        0.50     19       125.66    130       135.34    134
Hoquiam           0.11      8        77.49    117        83.17    121
Bellingham        0.17     15        47.02    138        52.96    147
Seattle           0.05      5        46.05    122        49.07    125
Olympia           0.05      5        58.46    120        61.77    122
Longview          0.00      0        50.78    111        53.80    112

Concrete          0.09      6        75.54    111        82.28    115
Snoqualmie Fall   0.05      4        69.49    115        73.49    116
Randle*           0.06      5        64.09    118        68.23    119
Diablo Dam        0.09      6        92.82    125        99.99    129
Stampede Pass     0.16     10        97.07    120       102.55    121
Paradise          0.02      1       138.67    124       147.30    127

Winthrop          0.97    216        16.09    109        16.67    110
Stehekin          0.15     31        49.77    139        51.61    140
Leavenworth       0.00      0        25.09    101        25.26     98
Mount Adams       0.00      0        50.33    112        53.14    116
Wenatchee         0.00      0         8.25    109         8.49    108
Yakima            0.00      0         6.72     86         7.15     89

Coulee Dam        0.00      0         9.40     88        10.30     93
Lind              0.06     25        10.64    109        11.28    111
Republic          0.85    133        17.62    102        18.45    102
Spokane           0.00      0        15.08     95        16.43    100
Pullman           0.10     20        22.57    134        23.41    134
Dayton*           0.23     51        24.23    134        25.03    133

* = Estimated

$$
Grub


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