464  
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  
 

 
 
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