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Issued by NWS Seattle/Tacoma, WA

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PNSSEW

Washington Precipitation Summary...amended
National Weather Service Seattle WA
716 PM PDT Sun Apr 22 2018

For March, a majority of the regions in Western Washington saw below
normal precipitation, with the Northwest Interior being the
exception.  It was the opposite in Eastern Washington where the
majority of regions were near to above normal for precipitation,
with the lone exception being the Central Basin. For the water year,
all of Washington remains near to above normal.

In western Washington, the monthly percentage of normal for
precipitation ranged from 56 percent in the Olympics to 98 percent
in the Northwest Interior.  The greatest amount of precipitation at
the climate stations for the mountains, coast and interior lowlands
was 9.61 inches at Paradise on the western slopes of the Cascades,
6.15 at Quillayute, and 5.93 inches at Mayfield in the Southwest
Interior.

For eastern Washington, the percentage of normal for precipitation
ranged from 76 percent in the Central Basin to 166 percent in the
Okanogan region.  The greatest amount of precipitation at climate
stations for the mountains and lowlands was 3.66 inches at Mount
Adams on the eastern slopes of the Cascades, and 2.68 at Omak in the
Okanogan region.

The outlook for April and beyond for Washington state, for the next
two weeks the outlook is for above normal precipitation.  The
monthly outlook for April also calls for above normal precipitation.
The three month outlook for April through June is calling for equal
chance of above, below and near 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.

                        March     Water year      Past 3       Past 12
                         2018       to date       months        months
Western Washington
  Coast                    57          103           97           105
  Olympics                 56          103           90           102
  Northwest Interior       98          133          140           115
  Puget Sound Lowlands     64          110          103           107
  Southwest Interior       67           98           89            98
  West Foothills Casca     70          114          110           104
  Cascades West            72          116          111           108

Eastern Washington
  East Slopes Cascades    106          107          109           104
  Okanogan                166          110          139           100
  Central Basin            76           99           91            98
  Northeast               105          115          131           100
  Palouse and Blue Mtn     95          120           96           107



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.

                     March            Water year       Past 12 months
                Inches    Pct       Inches    Pct       Inches    Pct

Quillayute        6.15     57        75.73    101       104.10    128
Hoquiam           3.80     54        54.25    104        71.02    129
Bellingham        3.56    114        32.10    133        41.76    134
Seattle           2.44     66        31.58    112        40.20    127
Olympia           2.59     49        41.85    107        53.18    129
Longview          3.30     71        35.64    103        48.01    118

Concrete          4.54     67        60.24    115        72.67    126
Snoqualmie Fall   4.12     66        48.62    109        64.03    121
Randle*           3.72     70        50.62    121        62.92    130
Diablo Dam        4.48     63        66.97    111        77.01    121
Stampede Pass     6.18     82        76.12    125        92.69    132
Paradise          9.61     77       102.10    112       124.90    126

Winthrop          3.04    295        12.97    130        17.31    129
Stehekin          3.50    122        39.30    129        43.77    142
Leavenworth       1.62     78        18.25     90        23.14    108
Mount Adams       3.66     67        38.66    101        48.28    127
Wenatchee         0.72    118         5.38     84         8.42    106
Yakima            0.38     61         5.14     91         7.55    103

Coulee Dam        1.40    154         7.13    112        11.08    119
Lind              1.15    112         8.55    132        11.32    138
Republic          2.09    166        11.29    128        17.99    119
Spokane           1.30     81        12.61    120        17.44    130
Pullman           1.44     91        14.71    110        20.39    126
Dayton            2.08     95        14.16    113        19.14    126

* = Estimated

$$

Grub



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