Stream and Station

Most
Probable
Forecast
(1000 AF)

Most
Probable
Forecast
(% of Avg)

Reasonable
Maximum
(% of Avg)

Reasonable
Minimum
(% of Avg)

30 Year
(1971 - 2000)
Avg Runoff
(1000 AF)

McKENZIE RIVER
Vida nr, OR

APR-SEP

1250

104

126

82

1201

S. SANTIAM RIVER
Waterloo, OR

APR-SEP

660

112

145

80

587

N. SANTIAM RIVER
Mehama, OR

APR-SEP

950

114

142

85

834

WILLAMETTE RIVER
Salem, OR

APR-SEP

5200

108

140

76

4804

CLACKAMAS RIVER
Estacada, OR

APR-SEP

900

120

137

104

748

SKAGIT RIVER
Concrete nr, WA

APR-SEP

6720

106

125

86

6365

DUNGENESS RIVER
Sequim nr, WA

APR-SEP

161

106

118

94

152

COWLITZ RIVER
Mayfield Res Inflow, WA
Castle Rock, WA

APR-SEP
APR-JUL
APR-SEP

2060
1810
2670

107
107
101

152
159
147

62
56
56

1922
1689
2639

LEWIS RIVER
Ariel, WA

APR-SEP

1360

116

140

91

1176