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

1330

111

132

85

1201

S. SANTIAM RIVER
Waterloo, OR

APR-SEP

700

119

154

83

587

N. SANTIAM RIVER
Mehama, OR

APR-SEP

980

118

151

83

834

WILLAMETTE RIVER
Salem, OR

APR-SEP

5420

113

148

78

4804

CLACKAMAS RIVER
Estacada, OR

APR-SEP

900

120

141

99

748

SKAGIT RIVER
Concrete nr, WA

APR-SEP

6350

100

125

74

6365

DUNGENESS RIVER
Sequim nr, WA

APR-SEP

166

109

120

98

152

COWLITZ RIVER
Mayfield Res Inflow, WA
Castle Rock, WA

APR-SEP
APR-JUL
APR-SEP

1900
1670
2530

99
99
96

156
164
154

42
34
37

1922
1689
2639

LEWIS RIVER
Ariel, WA

APR-SEP

1200

102

163

41

1176