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

870

73

95

52

1184

S. SANTIAM RIVER
Waterloo, OR

APR-SEP

430

75

100

41

576

N. SANTIAM RIVER
Mehama, OR

APR-SEP

625

75

104

47

832

WILLAMETTE RIVER
Salem, OR

APR-SEP

3460

74

100

49

4670

CLACKAMAS RIVER
Estacada, OR

APR-SEP

570

77

93

60

742

SKAGIT RIVER
Concrete nr, WA

APR-SEP

4320

66

85

47

6525

DUNGENESS RIVER
Sequim nr, WA

APR-SEP

101

66

78

54

153

COWLITZ RIVER
Mayfield Res Inflow, WA
Castle Rock, WA

APR-SEP
APR-JUL
APR-SEP

1150
1010
1680

58
58
63

102
109
108

14
08
18

1971
1731
2668

LEWIS RIVER
Ariel, WA

APR-SEP

780

65

98

32

1204