594
NOUS46 KSEW 062100
PNSSEW
WASHINGTON PRECIPITATION SUMMARY
NATIONAL WEATHER SERVICE SEATTLE WA
200 PM PDT TUE APR 6 2021
MARCH BROUGHT BELOW NORMAL PRECIPITATION FOR MUCH OF THE STATE,
EXCEPT FOR THE OLYMPIC MOUNTAINS, WHICH RECEIVED NEAR NORMAL
PRECIPITATION. FOR THE WATER YEAR, ALL OF WESTERN WASHINGTON AND
MOST OF EASTERN WASHINGTON ARE NEAR TO ABOVE NORMAL. ONLY THE
OKANOGAN REGION AND CENTRAL BASIN IN EASTERN WASHINGTON ARE BELOW
NORMAL.
FOR WESTERN WASHINGTON, THE MONTHLY PERCENTAGE OF NORMAL FOR
PRECIPITATION RANGED FROM 55 PERCENT IN THE SOUTHWEST INTERIOR TO 94
PERCENT IN THE OLYMPIC MOUNTAINS. THE GREATEST AMOUNT OF
PRECIPITATION AT THE CLIMATE STATIONS FOR THE MOUNTAINS, COAST AND
INTERIOR LOWLANDS WAS 12.79 INCHES AT FORKS IN THE OLYMPIC
MOUNTAINS, 9.36 AT QUILLAYUTE, AND 5.14 INCHES AT ELMA IN THE
SOUTHWEST INTERIOR.
FOR EASTERN WASHINGTON, THE PERCENTAGE OF NORMAL FOR PRECIPITATION
RANGED FROM 8 PERCENT IN THE OKANOGAN REGION TO 41 PERCENT IN THE
PALOUSE AND BLUE MOUNTAINS. THE GREATEST AMOUNT OF PRECIPITATION AT
THE CLIMATE STATIONS FOR THE MOUNTAINS AND LOWLANDS WAS 1.07 INCHES
AT CLE ELUM ON THE EASTERN SLOPES OF THE CASCADES, AND 0.57 AT
NORTHPORT IN THE NORTHEAST REGION.
THE OUTLOOK FOR APRIL AND BEYOND FOR WASHINGTON STATE, FOR THE NEXT
TWO WEEKS THE OUTLOOK IS FOR BELOW NORMAL PRECIPITATION. THE
MONTHLY OUTLOOK FOR APRIL CALLS FOR EQUAL CHANCES OF ABOVE, BELOW
AND NEAR NORMAL PRECIPITATION FOR THE STATE. THE THREE MONTH
OUTLOOK FOR APRIL THROUGH JUNE CALLS FOR EQUAL CHANCES OF ABOVE,
BELOW AND NEAR NORMAL PRECIPITATION FOR MUCH OF THE STATE, EXCEPT
FOR BELOW NORMAL PRECIPITATION IN THE EXTREME SOUTHEAST CORNER.
THE TABLE BELOW GIVES PRECIPITATION FIGURES AS A PERCENT OF NORMAL
FOR REGIONS OF WASHINGTON. THE CURRENT WATER YEAR BEGAN 1 OCTOBER
2020 AND ENDS 30 SEPTEMBER 2021.
MARCH WATER YEAR PAST 3 PAST 12
2021 TO DATE MONTHS MONTHS
WESTERN WASHINGTON
COAST 85 109 114 104
OLYMPICS 94 98 105 98
NORTHWEST INTERIOR 58 115 108 109
PUGET SOUND LOWLANDS 70 108 121 110
SOUTHWEST INTERIOR 55 95 102 96
WEST FOOTHILLS CASCA 63 107 110 104
CASCADES WEST 60 108 111 105
EASTERN WASHINGTON
EAST SLOPES CASCADES 30 110 116 102
OKANOGAN 8 87 77 86
CENTRAL BASIN 12 73 70 74
NORTHEAST 23 102 99 102
PALOUSE AND BLUE MTN 41 95 83 96
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 9.36 86 78.20 105 100.19 101
HOQUIAM 5.75 82 58.62 112 72.23 107
BELLINGHAM 1.75 56 28.18 117 40.06 114
SEATTLE 2.61 70 30.85 109 40.91 109
OLYMPIA 3.01 57 43.50 111 53.89 108
LONGVIEW 3.00 64 36.39 105 49.40 103
CONCRETE 3.12 46 58.21 111 76.97 109
SNOQUALMIE FALL 3.80 61 43.98 98 60.92 98
RANDLE* 3.33 63 44.93 108 60.00 105
DIABLO DAM 3.81 54 60.80 101 75.94 98
STAMPEDE PASS 5.68 75 81.59 134 101.10 124
PARADISE 7.88 63 98.49 108 122.19 103
WINTHROP 0.04 4 11.97 120 14.33 97
STEHEKIN 0.65 23 37.56 124 43.30 120
LEAVENWORTH* 0.63 30 25.23 124 29.05 116
MOUNT ADAMS* 1.65 30 38.10 99 41.64 91
WENATCHEE 0.10 16 5.62 88 6.97 77
YAKIMA 0.08 13 4.47 79 5.72 69
COULEE DAM 0.12 13 6.32 99 10.40 96
LIND 0.07 7 4.70 73 9.16 94
REPUBLIC 0.33 26 10.93 124 20.49 121
SPOKANE 0.26 16 9.60 91 14.41 87
PULLMAN 0.84 53 12.93 96 19.45 96
DAYTON 0.70 32 10.75 86 16.26 85
* = ESTIMATED
GRUB
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