Overview Realtime Historical Map View

Cowlitz River At Castle Rock, Wa Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 13425.83
01-02 13250.91
01-03 14255.45
01-04 15392.5
01-05 14795.0
01-06 15569.17
01-07 20341.67
01-08 17442.5
01-09 15800.0
01-10 15900.0
01-11 16023.33
01-12 16740.0
01-13 18300.0
01-14 17208.33
01-15 15858.33
01-16 15700.0
01-17 15707.69
01-18 15700.0
01-19 15936.67
01-20 15800.83
01-21 16160.0
01-22 16426.15
01-23 16583.33
01-24 16623.08
01-25 16455.0
01-26 15080.83
01-27 14685.38
01-28 15880.0
01-29 15649.23
01-30 15215.0
01-31 15087.86
02-01 14566.15
02-02 14708.46
02-03 13667.86
02-04 13366.43
02-05 13623.57
02-06 14716.15
02-07 15558.46
02-08 15933.33
02-09 13917.14
02-10 13781.54
02-11 13520.0
02-12 13738.46
02-13 13766.92
02-14 13399.23
02-15 13049.29
02-16 13509.23
02-17 12125.38
02-18 13082.31
02-19 13950.71
02-20 12847.14
02-21 12150.0
02-22 12421.43
02-23 14350.71
02-24 14042.86
02-25 12687.5
02-26 13570.0
02-27 13180.71
02-28 12323.57
02-29 16625.0
03-01 15114.62
03-02 13547.14
03-03 12455.71
03-04 11749.29
03-05 11329.29
03-06 11967.14
03-07 12357.14
03-08 11050.0
03-09 11136.43
03-10 11654.29
03-11 11973.57
03-12 12807.86
03-13 13044.29
03-14 15183.57
03-15 14140.71
03-16 14612.14
03-17 13837.86
03-18 12683.57
03-19 12496.0
03-20 12330.71
03-21 12644.67
03-22 12503.57
03-23 11752.0
03-24 11674.67
03-25 11822.67
03-26 11626.67
03-27 11474.67
03-28 11740.0
03-29 11734.67
03-30 12784.0
03-31 12547.14
04-01 11814.0
04-02 11678.0
04-03 11269.33
04-04 10850.67
04-05 10986.67
04-06 10478.57
04-07 10845.33
04-08 11762.67
04-09 11958.46
04-10 11506.67
04-11 11838.0
04-12 12783.57
04-13 11771.43
04-14 11300.0
04-15 11377.69
04-16 10926.92
04-17 10645.83
04-18 10830.77
04-19 10630.0
04-20 10306.15
04-21 10487.14
04-22 10026.43
04-23 10786.43
04-24 10457.14
04-25 11241.54
04-26 10424.29
04-27 9935.0
04-28 9721.43
04-29 9457.86
04-30 8930.0
05-01 9978.67
05-02 9334.29
05-03 9432.14
05-04 9954.0
05-05 10336.0
05-06 10251.33
05-07 10620.0
05-08 9410.0
05-09 9860.0
05-10 9860.0
05-11 9778.67
05-12 9667.33
05-13 9740.67
05-14 9407.69
05-15 9507.69
05-16 10637.14
05-17 9698.57
05-18 8949.33
05-19 8826.67
05-20 8752.86
05-21 8877.86
05-22 9060.0
05-23 9387.33
05-24 8721.33
05-25 8318.67
05-26 8077.33
05-27 8090.67
05-28 8412.0
05-29 8425.33
05-30 8507.33
05-31 8310.0
06-01 7888.0
06-02 8283.33
06-03 7828.67
06-04 8078.67
06-05 7891.43
06-06 7895.71
06-07 8390.0
06-08 8160.0
06-09 7784.67
06-10 8125.33
06-11 7964.0
06-12 7790.0
06-13 7176.43
06-14 7630.0
06-15 7444.67
06-16 7882.67
06-17 7738.0
06-18 7341.33
06-19 7387.14
06-20 7222.86
06-21 7794.29
06-22 7702.14
06-23 7545.71
06-24 7392.14
06-25 7332.14
06-26 7304.29
06-27 7200.0
06-28 7116.43
06-29 7170.71
06-30 7120.71
07-01 6741.43
07-02 6202.14
07-03 5221.43
07-04 4870.77
07-05 4638.67
07-06 4821.33
07-07 4975.0
07-08 4704.29
07-09 4723.57
07-10 4658.0
07-11 4604.29
07-12 4727.14
07-13 4710.0
07-14 4500.0
07-15 4467.14
07-16 4356.15
07-17 4364.29
07-18 4426.92
07-19 4096.43
07-20 3899.29
07-21 3995.71
07-22 4045.38
07-23 3921.43
07-24 4133.57
07-25 4200.71
07-26 4155.71
07-27 4096.43
07-28 4010.71
07-29 4252.14
07-30 4444.62
07-31 4428.57
08-01 4495.0
08-02 4232.31
08-03 4182.14
08-04 4138.57
08-05 3980.0
08-06 4002.86
08-07 3939.29
08-08 4033.08
08-09 4136.15
08-10 4199.23
08-11 4110.0
08-12 4101.54
08-13 3944.17
08-14 3895.71
08-15 3966.43
08-16 4032.31
08-17 4512.5
08-18 4557.5
08-19 4263.08
08-20 4017.69
08-21 3770.0
08-22 3650.0
08-23 3752.14
08-24 3766.67
08-25 3716.92
08-26 3812.14
08-27 3817.86
08-28 3689.29
08-29 3695.71
08-30 3822.14
08-31 3674.62
09-01 3552.86
09-02 3571.43
09-03 3692.14
09-04 3828.57
09-05 4052.14
09-06 3996.43
09-07 3921.43
09-08 3664.29
09-09 3772.14
09-10 3811.43
09-11 3738.57
09-12 3623.57
09-13 3421.54
09-14 3429.29
09-15 3435.0
09-16 3599.23
09-17 3549.29
09-18 3565.71
09-19 3659.29
09-20 3547.86
09-21 3563.85
09-22 3576.43
09-23 3430.0
09-24 3630.71
09-25 3720.71
09-26 3721.43
09-27 3993.57
09-28 4055.71
09-29 4713.57
09-30 5026.92
10-01 5775.0
10-02 5357.69
10-03 5314.17
10-04 4990.0
10-05 4582.86
10-06 4551.43
10-07 4553.57
10-08 4530.71
10-09 4664.29
10-10 4730.71
10-11 4838.57
10-12 5017.14
10-13 4927.14
10-14 5121.43
10-15 5483.08
10-16 5655.38
10-17 5440.71
10-18 5402.86
10-19 5506.15
10-20 6050.77
10-21 5789.23
10-22 6309.23
10-23 6572.31
10-24 6013.85
10-25 5844.62
10-26 5862.5
10-27 6199.29
10-28 6081.54
10-29 6277.14
10-30 6918.57
10-31 7221.54
11-01 7132.31
11-02 7190.0
11-03 7069.23
11-04 7018.57
11-05 8494.29
11-06 8787.69
11-07 9233.85
11-08 9124.62
11-09 8204.62
11-10 7786.92
11-11 7829.23
11-12 9236.15
11-13 11319.17
11-14 11110.71
11-15 10814.29
11-16 11072.86
11-17 9760.0
11-18 10541.54
11-19 11070.0
11-20 13756.43
11-21 12127.14
11-22 12434.62
11-23 11863.85
11-24 12533.85
11-25 12270.0
11-26 13096.67
11-27 11860.77
11-28 11722.14
11-29 12568.57
11-30 12110.71
12-01 11872.14
12-02 12523.57
12-03 13005.38
12-04 12668.57
12-05 13442.14
12-06 13655.83
12-07 13567.5
12-08 15536.43
12-09 17765.0
12-10 17401.43
12-11 16952.86
12-12 17047.86
12-13 15228.46
12-14 14377.5
12-15 13840.0
12-16 14530.77
12-17 14902.5
12-18 14900.0
12-19 18211.54
12-20 18070.0
12-21 19570.0
12-22 18557.69
12-23 16980.77
12-24 16456.67
12-25 14840.83
12-26 12866.0
12-27 14581.82
12-28 14586.36
12-29 14590.0
12-30 14114.55
12-31 14140.83

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index