Stream and Station

Most
Probable
Forecast
(1000 AF)

Most
Probable
Forecast
(% of Avg)

Reasonable
Maximum
(% of Avg)

Reasonable
Minimum
(% of Avg)

30 Year
(1961-1990)
Avg Runoff
(1000 AF)

McKENZIE RIVER
Vida nr, OR

APR-SEP

2110

102

1184

S. SANTIAM RIVER
Waterloo, OR

APR-SEP

540

94

576

N. SANTIAM RIVER
Mehama, OR

APR-SEP

820

99

832

WILLAMETTE RIVER
Salem, OR

APR-SEP

4360

93

4670

CLACKAMAS RIVER
Estacada, OR

APR-SEP

790

106

742

SKAGIT RIVER
Concrete nr, WA

APR-SEP

6510

100

117

82

6525

DUNGENESS RIVER
Sequim nr, WA

APR-SEP

155

101

153

COWLITZ RIVER
Mayfield Res Inflow, WA
Castle Rock, WA

APR-SEP
APR-SEP

2020
1770
2640

102
102
99

143
148
140

62
57
58

1971
1731
2668

LEWIS RIVER
Ariel, WA

APR-SEP

1350

112

137

86

1204