Overview Realtime Historical Map View
Heat Advisory
2026-09-02T19:00:00-05:00

* WHAT...Heat index values up to 100-103 degrees. * WHERE...Portions of central and south central Iowa, including the Des Moines metro. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Des Moines River At Ottumwa, Ia 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 8481.89
01-02 8237.89
01-03 7997.56
01-04 7710.89
01-05 7830.89
01-06 7236.78
01-07 7942.5
01-08 8217.25
01-09 7576.78
01-10 7057.33
01-11 6737.56
01-12 6170.9
01-13 5567.7
01-14 5481.56
01-15 5771.38
01-16 5159.0
01-17 5762.75
01-18 5140.0
01-19 5668.11
01-20 5961.0
01-21 5949.71
01-22 4601.5
01-23 4156.43
01-24 3618.63
01-25 4143.75
01-26 2115.29
01-27 2323.5
01-28 3990.57
01-29 3986.0
01-30 3626.5
01-31 3322.38
02-01 3732.25
02-02 3859.13
02-03 3900.67
02-04 5893.78
02-05 6456.63
02-06 6196.29
02-07 5320.75
02-08 5356.0
02-09 4769.63
02-10 4497.29
02-11 4388.83
02-12 3499.13
02-13 4008.38
02-14 3063.56
02-15 3183.56
02-16 3702.11
02-17 2838.38
02-18 4053.5
02-19 2915.25
02-20 6006.22
02-21 7537.67
02-22 8023.67
02-23 8206.89
02-24 8578.22
02-25 9438.75
02-26 7456.33
02-27 6805.44
02-28 7362.0
02-29 11575.5
03-01 8357.13
03-02 8469.56
03-03 9470.25
03-04 7312.6
03-05 6529.45
03-06 6965.25
03-07 6790.92
03-08 7072.0
03-09 7593.33
03-10 9020.38
03-11 10484.08
03-12 10025.36
03-13 10615.93
03-14 10318.0
03-15 9179.21
03-16 9245.71
03-17 9747.57
03-18 9371.14
03-19 9399.87
03-20 8955.0
03-21 10117.86
03-22 8084.0
03-23 9368.67
03-24 9304.0
03-25 9892.0
03-26 10073.33
03-27 10350.67
03-28 11636.43
03-29 11098.0
03-30 11222.67
03-31 10602.86
04-01 10972.67
04-02 11300.0
04-03 12079.33
04-04 12068.0
04-05 11980.0
04-06 12865.33
04-07 12613.33
04-08 12360.53
04-09 10569.29
04-10 11590.67
04-11 11822.67
04-12 11887.86
04-13 11141.5
04-14 10657.14
04-15 11166.92
04-16 12336.15
04-17 13785.83
04-18 15616.67
04-19 15292.5
04-20 13613.33
04-21 11464.62
04-22 11642.31
04-23 11706.92
04-24 11966.43
04-25 12766.92
04-26 14280.71
04-27 14536.43
04-28 14607.86
04-29 14580.0
04-30 15844.29
05-01 14762.67
05-02 11759.29
05-03 10960.71
05-04 11477.07
05-05 12572.67
05-06 12077.27
05-07 12663.33
05-08 12970.71
05-09 13623.33
05-10 13260.71
05-11 13495.33
05-12 13364.67
05-13 13775.33
05-14 13798.29
05-15 15259.29
05-16 14869.29
05-17 15245.0
05-18 15298.67
05-19 16319.33
05-20 16260.71
05-21 15250.0
05-22 16060.67
05-23 15595.33
05-24 15780.0
05-25 15484.0
05-26 16867.33
05-27 15682.0
05-28 15668.0
05-29 18253.33
05-30 17822.0
05-31 16118.0
06-01 14976.67
06-02 16043.33
06-03 16760.67
06-04 16738.0
06-05 17421.43
06-06 17262.14
06-07 18445.0
06-08 17765.33
06-09 17945.33
06-10 18349.33
06-11 18569.33
06-12 17107.14
06-13 16715.0
06-14 16493.85
06-15 16429.29
06-16 17142.0
06-17 15503.33
06-18 15818.73
06-19 15492.86
06-20 15305.79
06-21 16327.14
06-22 15234.29
06-23 16395.71
06-24 16665.71
06-25 16996.43
06-26 17846.43
06-27 17206.43
06-28 16839.29
06-29 16898.57
06-30 15683.57
07-01 15404.29
07-02 14967.86
07-03 14452.86
07-04 14461.43
07-05 13777.33
07-06 15862.14
07-07 16820.0
07-08 16341.54
07-09 16185.54
07-10 15110.71
07-11 15007.86
07-12 16130.0
07-13 15233.85
07-14 14702.13
07-15 14742.87
07-16 14756.86
07-17 14278.93
07-18 12962.6
07-19 12069.27
07-20 12631.36
07-21 12567.87
07-22 12659.67
07-23 12864.13
07-24 12397.33
07-25 12215.2
07-26 11933.53
07-27 11377.2
07-28 11472.0
07-29 11263.6
07-30 10651.2
07-31 9738.6
08-01 10626.15
08-02 9847.47
08-03 9825.73
08-04 9547.2
08-05 9200.73
08-06 8872.13
08-07 8586.8
08-08 7771.5
08-09 7366.57
08-10 7133.86
08-11 7861.0
08-12 8069.87
08-13 7830.93
08-14 8109.93
08-15 8073.6
08-16 9216.07
08-17 8681.93
08-18 7057.23
08-19 6271.36
08-20 5678.86
08-21 5807.36
08-22 7055.69
08-23 7260.33
08-24 7974.29
08-25 7356.57
08-26 6969.13
08-27 6381.53
08-28 6274.73
08-29 6054.13
08-30 5522.07
08-31 6075.14
09-01 5539.93
09-02 5822.43
09-03 5213.57
09-04 5689.29
09-05 5570.57
09-06 4638.92
09-07 5427.21
09-08 4247.77
09-09 4646.36
09-10 4835.21
09-11 5249.29
09-12 4676.71
09-13 4171.21
09-14 6441.38
09-15 6473.86
09-16 6331.21
09-17 6419.36
09-18 6703.21
09-19 7148.79
09-20 6950.57
09-21 7102.64
09-22 6110.15
09-23 7198.29
09-24 7076.36
09-25 6615.57
09-26 6588.0
09-27 6625.64
09-28 6663.21
09-29 6912.21
09-30 7128.54
10-01 4582.67
10-02 4182.31
10-03 5186.38
10-04 5544.23
10-05 7231.0
10-06 8549.31
10-07 8235.23
10-08 8296.46
10-09 7993.64
10-10 7817.14
10-11 7612.36
10-12 7114.21
10-13 7471.36
10-14 8303.36
10-15 9518.69
10-16 6607.69
10-17 7129.29
10-18 7177.5
10-19 7209.79
10-20 7038.71
10-21 5917.25
10-22 6672.36
10-23 6669.64
10-24 6499.36
10-25 6657.86
10-26 7041.14
10-27 6718.07
10-28 6338.14
10-29 6238.79
10-30 6324.64
10-31 6168.21
11-01 5756.14
11-02 5565.38
11-03 5320.5
11-04 5219.07
11-05 5275.0
11-06 4828.15
11-07 4762.85
11-08 4577.46
11-09 4409.46
11-10 4250.31
11-11 3900.92
11-12 4330.92
11-13 4145.38
11-14 4213.79
11-15 4367.64
11-16 4575.64
11-17 4546.43
11-18 3855.23
11-19 3592.0
11-20 3319.85
11-21 4209.36
11-22 5094.54
11-23 4761.5
11-24 5328.69
11-25 5899.69
11-26 5724.93
11-27 5828.5
11-28 4045.15
11-29 5324.36
11-30 5282.43
12-01 5660.86
12-02 6172.21
12-03 6193.36
12-04 5743.57
12-05 6227.23
12-06 6353.08
12-07 6540.46
12-08 6093.85
12-09 5649.85
12-10 5949.38
12-11 6013.69
12-12 5567.0
12-13 5489.77
12-14 4448.82
12-15 4467.91
12-16 4332.9
12-17 4808.0
12-18 5573.64
12-19 6378.3
12-20 3278.3
12-21 2916.1
12-22 5538.55
12-23 6076.0
12-24 6073.7
12-25 6027.36
12-26 5420.09
12-27 5592.55
12-28 2973.8
12-29 4217.75
12-30 8086.89
12-31 8608.56

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index