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

1320

111

136

87

1184

S. SANTIAM RIVER
Waterloo, OR

APR-SEP

650

113

149

77

576

N. SANTIAM RIVER
Mehama, OR

APR-SEP

960

115

148

83

832

WILLAMETTE RIVER
Salem, OR

APR-SEP

4900

105

132

77

4670

CLACKAMAS RIVER
Estacada, OR

APR-SEP

820

111

130

89

742

SKAGIT RIVER
Concrete nr, WA

APR-SEP

6440

99

121

76

6525

DUNGENESS RIVER
Sequim nr, WA

APR-SEP

160

105

116

93

153

COWLITZ RIVER
Mayfield Res Inflow, WA
Castle Rock, WA

APR-SEP
APR-SEP

2190
1920
2940

111
111
110

160
166
161

62
56
60

1971
1731
2668

LEWIS RIVER
Ariel, WA

APR-SEP

1350

112

154

69

1204