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

1260

105

129

81

1201

S. SANTIAM RIVER
Waterloo, OR

APR-SEP

660

112

148

77

587

N. SANTIAM RIVER
Mehama, OR

APR-SEP

950

114

146

82

834

WILLAMETTE RIVER
Salem, OR

APR-SEP

5250

109

144

75

4804

CLACKAMAS RIVER
Estacada, OR

APR-SEP

850

114

135

93

748

SKAGIT RIVER
Concrete nr, WA

APR-SEP

6380

100

123

77

6365

DUNGENESS RIVER
Sequim nr, WA

APR-SEP

160

105

116

94

152

COWLITZ RIVER
Mayfield Res Inflow, WA
Castle Rock, WA

APR-SEP
APR-JUL
APR-SEP

2000
1760
2620

104
104
99

154
161
150

54
47
48

1922
1689
2639

LEWIS RIVER
Ariel, WA

APR-SEP

1300

111

154

66

1176