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

1450

122

147

98

1184

S. SANTIAM RIVER
Waterloo, OR

APR-SEP

715

124

160

88

576

N. SANTIAM RIVER
Mehama, OR

APR-SEP

1030

124

156

92

832

WILLAMETTE RIVER
Salem, OR

APR-SEP

5890

126

142

110

4670

CLACKAMAS RIVER
Estacada, OR

APR-SEP

900

121

141

99

742

SKAGIT RIVER
Concrete nr, WA

APR-SEP

8550

131

153

109

6525

DUNGENESS RIVER
Sequim nr, WA

APR-SEP

200

131

142

120

153

COWLITZ RIVER
Mayfield Res Inflow, WA
Castle Rock, WA

APR-SEP
APR-SEP

2710
2380
3610

137
137
135

186
193
186

89
82
85

1971
1731
2668

LEWIS RIVER
Ariel, WA

APR-SEP

1680

140

182

96

1204