Overview Realtime Historical Map View
Flood Watch
2026-08-15T10:00:00-05:00

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bureau, Carroll, Henry IL, Putnam, Rock Island and Whiteside and east central Iowa, including the following areas, Benton, Cedar, Clinton, Iowa, Jackson, Johnson, Jones, Linn, Muscatine and Scott. * WHEN...Through Saturday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Some of the flooding may be significant. * ADDITIONAL DETAILS... - Rounds of rain with embedded thunderstorms will occur across the area through Saturday morning with peak hourly rates between 1 to 2 inches from the strongest storms. Rainfall totals will vary considerably across the watch area. The hardest hit areas along and north of Highway 34 could receive 5 to 8 inches of rainfall with isolated higher amounts possible. Flash flooding is a risk with an increased chance of river and creek flooding.

Cedar River Near Conesville, 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 7041.43
01-02 8251.67
01-03 7478.57
01-04 7088.57
01-05 7333.33
01-06 6686.67
01-07 6306.67
01-08 6852.0
01-09 7066.0
01-10 6896.0
01-11 6617.5
01-12 6070.0
01-13 4043.33
01-14 3652.5
01-15 3930.0
01-16 3717.5
01-17 3677.5
01-18 3124.8
01-19 3244.0
01-20 7142.25
01-21 6460.25
01-22 8755.0
01-23 16000.0
01-24 16600.0
01-25 17600.0
01-28 17200.0
01-29 16700.0
01-30 16100.0
01-31 8920.0
02-01 8935.0
02-02 6045.0
02-03 5165.0
02-04 5625.0
02-05 4790.0
02-06 4505.0
02-07 4155.0
02-08 4085.0
02-09 4350.0
02-10 4155.0
02-11 3670.0
02-12 3330.0
02-13 3055.0
02-14 3015.0
02-15 3150.0
02-16 3160.0
02-17 3215.0
02-18 3345.0
02-19 2680.0
02-20 4100.0
02-21 6010.0
02-22 6840.0
02-23 6780.0
02-24 9115.0
02-25 9325.0
02-26 8010.0
02-27 7850.0
02-28 5970.0
02-29 5746.67
03-01 5610.0
03-02 5566.67
03-03 8127.5
03-04 8807.5
03-05 8628.0
03-06 9165.0
03-07 8780.0
03-08 8050.0
03-09 6282.86
03-10 6943.0
03-11 9040.0
03-12 9908.18
03-13 9550.83
03-14 9249.23
03-15 9153.08
03-16 9240.0
03-17 8890.0
03-18 8549.23
03-19 8669.29
03-20 11047.14
03-21 11737.33
03-22 10886.43
03-23 10614.67
03-24 10040.0
03-25 10015.33
03-26 10067.33
03-27 10092.67
03-28 9847.33
03-29 9548.0
03-30 9074.0
03-31 8725.71
04-01 8920.67
04-02 8833.33
04-03 9144.67
04-04 9596.67
04-05 9705.33
04-06 10005.33
04-07 9914.67
04-08 9645.33
04-09 9262.86
04-10 9548.0
04-11 9760.67
04-12 10720.71
04-13 9660.0
04-14 9103.57
04-15 9502.31
04-16 9909.23
04-17 10652.31
04-18 11772.31
04-19 12821.54
04-20 12602.31
04-21 11800.71
04-22 11180.71
04-23 10538.57
04-24 10608.57
04-25 10589.23
04-26 11109.29
04-27 10876.43
04-28 10718.57
04-29 10895.0
04-30 11490.0
05-01 11748.0
05-02 11134.29
05-03 10947.86
05-04 10955.71
05-05 11774.67
05-06 12045.33
05-07 11944.67
05-08 11479.29
05-09 11398.67
05-10 11518.67
05-11 11716.0
05-12 11559.33
05-13 10997.33
05-14 10460.71
05-15 9863.08
05-16 9972.14
05-17 9837.86
05-18 9560.0
05-19 9706.67
05-20 10315.71
05-21 9872.67
05-22 10306.67
05-23 10535.33
05-24 10624.0
05-25 10738.67
05-26 11255.33
05-27 12104.0
05-28 12602.67
05-29 12680.67
05-30 13481.33
05-31 13840.0
06-01 13628.0
06-02 13868.0
06-03 13986.67
06-04 13800.0
06-05 13488.57
06-06 12259.29
06-07 11285.71
06-08 10485.33
06-09 10412.0
06-10 10490.0
06-11 11018.0
06-12 11208.57
06-13 11809.29
06-14 11637.14
06-15 11988.67
06-16 12586.67
06-17 12741.43
06-18 12930.71
06-19 11965.71
06-20 11425.71
06-21 11737.14
06-22 12227.14
06-23 12682.14
06-24 13245.71
06-25 14274.29
06-26 17435.71
06-27 18525.0
06-28 18857.14
06-29 17827.14
06-30 17506.43
07-01 17123.57
07-02 18335.71
07-03 16920.0
07-04 14967.86
07-05 13940.67
07-06 13348.0
07-07 13353.57
07-08 12009.29
07-09 11262.86
07-10 10147.33
07-11 9704.0
07-12 9327.33
07-13 9150.0
07-14 9171.33
07-15 8926.67
07-16 7554.29
07-17 8313.33
07-18 7584.67
07-19 6916.0
07-20 6577.33
07-21 6706.67
07-22 7207.33
07-23 7780.67
07-24 7496.67
07-25 7046.67
07-26 6866.0
07-27 6619.13
07-28 6280.0
07-29 6443.57
07-30 6583.57
07-31 6620.0
08-01 6809.85
08-02 6506.6
08-03 6542.73
08-04 6599.36
08-05 6139.33
08-06 6018.67
08-07 5898.0
08-08 5405.71
08-09 5179.29
08-10 5079.29
08-11 5090.67
08-12 5238.0
08-13 5954.0
08-14 5624.0
08-15 4807.14
08-16 4519.23
08-17 4396.92
08-18 4318.33
08-19 3952.31
08-20 3844.62
08-21 3746.15
08-22 3959.83
08-23 3953.5
08-24 3936.15
08-25 4206.77
08-26 4789.29
08-27 4534.14
08-28 4209.86
08-29 4332.71
08-30 4432.71
08-31 4837.46
09-01 4966.14
09-02 5631.0
09-03 5721.5
09-04 6081.07
09-05 6289.86
09-06 6017.62
09-07 6634.14
09-08 7003.08
09-09 7014.36
09-10 7086.43
09-11 7816.07
09-12 7384.07
09-13 6929.21
09-14 6549.29
09-15 5978.5
09-16 5476.93
09-17 5009.64
09-18 5138.79
09-19 5107.43
09-20 4902.36
09-21 5024.21
09-22 5404.38
09-23 5504.36
09-24 5922.5
09-25 6348.21
09-26 6886.86
09-27 7781.71
09-28 9941.23
09-29 11442.71
09-30 11458.0
10-01 8184.67
10-02 6448.85
10-03 5674.46
10-04 5747.69
10-05 7272.14
10-06 7294.43
10-07 7788.71
10-08 7734.57
10-09 7619.71
10-10 7310.14
10-11 7470.29
10-12 7762.71
10-13 7782.93
10-14 7390.07
10-15 7977.15
10-16 4977.69
10-17 7213.57
10-18 6790.0
10-19 6206.43
10-20 5722.86
10-21 3955.0
10-22 3585.92
10-23 3525.92
10-24 3500.77
10-25 3770.77
10-26 4942.14
10-27 4959.21
10-28 5032.71
10-29 5009.79
10-30 4987.14
10-31 4933.64
11-01 5067.0
11-02 5017.0
11-03 4981.43
11-04 4776.21
11-05 4752.86
11-06 4344.08
11-07 4322.46
11-08 4299.33
11-09 4218.77
11-10 4191.92
11-11 4216.62
11-12 4186.15
11-13 4157.69
11-14 4167.86
11-15 3692.31
11-16 3967.86
11-17 4013.15
11-18 3950.0
11-19 3918.5
11-20 3680.0
11-21 3728.08
11-22 3601.25
11-23 3571.5
11-24 3707.77
11-25 3843.62
11-26 3900.0
11-27 4124.43
11-28 3767.08
11-29 4481.14
11-30 4311.14
12-01 4369.15
12-02 4588.31
12-03 4866.38
12-04 4624.46
12-05 4431.64
12-06 4192.31
12-07 4575.85
12-08 4603.08
12-09 4391.42
12-10 4169.33
12-11 4102.67
12-12 3961.92
12-13 3735.55
12-14 3108.8
12-15 2986.9
12-16 3321.78
12-17 5354.91
12-18 5597.3
12-19 6064.89
12-20 4261.13
12-21 4500.0
12-22 7997.5
12-23 7708.75
12-24 6847.5
12-25 6346.25
12-26 5721.25
12-27 5627.5
12-28 5798.75
12-29 4272.86
12-30 6363.75
12-31 7005.71

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index