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Severe Thunderstorm Watch
2026-08-13T11:00:00-05:00

SEVERE THUNDERSTORM WATCH 581 REMAINS VALID UNTIL 11 AM CDT THIS MORNING FOR THE FOLLOWING AREAS IN IOWA THIS WATCH INCLUDES 14 COUNTIES IN CENTRAL IOWA GRUNDY JASPER MARSHALL POLK POWESHIEK STORY TAMA IN SOUTH CENTRAL IOWA CLARKE LUCAS MAHASKA MARION MONROE WARREN IN SOUTHEAST IOWA WAPELLO THIS INCLUDES THE CITIES OF ALBIA, AMES, CARLISLE, CHARITON, CONRAD, DES MOINES, DIKE, DYSART, GLADBROOK, GRINNELL, GRUNDY CENTER, INDIANOLA, KNOXVILLE, MARSHALLTOWN, NEWTON, NORWALK, OSCEOLA, OSKALOOSA, OTTUMWA, PELLA, REINBECK, TAMA, TOLEDO, TRAER, AND WELLSBURG. * PRIMARY THREATS INCLUDE... SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS TO 75 MPH POSSIBLE. ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE. A TORNADO OR TWO POSSIBLE.

Des Moines River Near Saylorville, 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 2911.75
01-02 2695.92
01-03 2833.08
01-04 2423.58
01-05 2327.92
01-06 2564.09
01-07 2517.18
01-08 2246.67
01-09 2259.67
01-10 2396.36
01-11 2377.55
01-12 2012.9
01-13 1906.8
01-14 1718.9
01-15 1750.8
01-16 1666.36
01-17 1648.09
01-18 1473.45
01-19 1189.38
01-20 1152.92
01-21 1021.55
01-22 1079.36
01-23 928.2
01-24 949.18
01-25 973.25
01-26 871.6
01-27 807.4
01-28 995.45
01-29 1001.55
01-30 962.33
01-31 980.92
02-01 982.08
02-02 970.17
02-03 967.25
02-04 1055.58
02-05 1010.42
02-06 1023.09
02-07 963.64
02-08 984.0
02-09 957.75
02-10 963.17
02-11 929.55
02-12 853.17
02-13 879.85
02-14 841.85
02-15 872.23
02-16 758.36
02-17 799.62
02-18 830.15
02-19 1038.33
02-20 1291.77
02-21 1552.31
02-22 1703.77
02-23 1803.77
02-24 1812.0
02-25 1949.23
02-26 2205.17
02-27 2271.23
02-28 2371.64
02-29 5499.5
03-01 2566.93
03-02 2646.92
03-03 2687.77
03-04 2911.62
03-05 2751.93
03-06 2826.29
03-07 2948.71
03-08 3151.79
03-09 3190.79
03-10 3212.36
03-11 3190.07
03-12 3315.07
03-13 3131.79
03-14 3302.21
03-15 3793.36
03-16 3902.29
03-17 3896.0
03-18 4017.57
03-19 4036.0
03-20 4144.79
03-21 5026.07
03-22 3942.07
03-23 4766.13
03-24 4929.0
03-25 4919.6
03-26 4930.27
03-27 5386.13
03-28 5493.2
03-29 5455.73
03-30 5729.27
03-31 5714.21
04-01 6424.33
04-02 6374.4
04-03 6220.93
04-04 6468.2
04-05 6671.27
04-06 6603.6
04-07 6419.93
04-08 5881.0
04-09 4483.57
04-10 5504.0
04-11 5358.13
04-12 5237.29
04-13 5248.57
04-14 5413.93
04-15 5395.0
04-16 5553.0
04-17 5863.46
04-18 5689.31
04-19 5853.08
04-20 5884.62
04-21 5789.57
04-22 6149.93
04-23 6233.71
04-24 6200.71
04-25 5613.08
04-26 6314.64
04-27 6120.07
04-28 5993.57
04-29 5944.29
04-30 5911.71
05-01 6067.33
05-02 6101.86
05-03 6599.0
05-04 6865.43
05-05 7234.2
05-06 7335.93
05-07 7377.47
05-08 7080.14
05-09 7091.67
05-10 7092.0
05-11 6759.33
05-12 6398.6
05-13 5966.0
05-14 5704.5
05-15 6309.71
05-16 6852.29
05-17 7148.71
05-18 6701.47
05-19 7116.8
05-20 7734.93
05-21 7611.27
05-22 7597.27
05-23 7796.67
05-24 7624.0
05-25 7424.0
05-26 7640.0
05-27 7866.67
05-28 8433.33
05-29 8584.67
05-30 8159.33
05-31 8029.33
06-01 8070.0
06-02 8174.0
06-03 8007.33
06-04 7794.0
06-05 7978.57
06-06 8142.14
06-07 8605.0
06-08 8022.0
06-09 7640.67
06-10 6981.33
06-11 6725.33
06-12 6641.43
06-13 6471.43
06-14 5886.43
06-15 6155.33
06-16 6471.73
06-17 6932.13
06-18 7208.4
06-19 7760.0
06-20 8170.0
06-21 8077.14
06-22 8071.86
06-23 8234.64
06-24 7907.07
06-25 8474.86
06-26 8181.57
06-27 7775.93
06-28 7817.29
06-29 7853.0
06-30 7963.43
07-01 8333.57
07-02 8373.57
07-03 8137.69
07-04 8180.0
07-05 7990.43
07-06 7982.86
07-07 8660.46
07-08 8528.92
07-09 8053.92
07-10 6672.2
07-11 6275.93
07-12 6165.33
07-13 6154.5
07-14 6189.47
07-15 5956.27
07-16 5636.93
07-17 5247.13
07-18 5005.33
07-19 4960.33
07-20 4777.67
07-21 5347.53
07-22 5700.87
07-23 5473.73
07-24 5096.93
07-25 4656.93
07-26 4610.93
07-27 4475.4
07-28 4245.6
07-29 4093.73
07-30 4085.0
07-31 4048.27
08-01 4062.08
08-02 3514.27
08-03 3359.6
08-04 3258.33
08-05 3094.6
08-06 2922.33
08-07 3047.13
08-08 3165.71
08-09 3081.21
08-10 2797.93
08-11 2558.64
08-12 2766.27
08-13 2799.2
08-14 2708.79
08-15 2462.93
08-16 2317.92
08-17 2178.69
08-18 1910.17
08-19 1701.15
08-20 1745.54
08-21 1885.92
08-22 2520.5
08-23 3421.64
08-24 2945.54
08-25 2706.77
08-26 2711.36
08-27 2381.43
08-28 2159.5
08-29 2132.71
08-30 2714.57
08-31 3191.46
09-01 2959.57
09-02 3230.64
09-03 3134.36
09-04 2639.21
09-05 2583.5
09-06 2086.08
09-07 2289.21
09-08 2005.15
09-09 2342.71
09-10 2377.14
09-11 2558.64
09-12 2875.29
09-13 2895.71
09-14 2760.36
09-15 2457.43
09-16 2267.64
09-17 2276.29
09-18 2574.14
09-19 2755.0
09-20 2803.0
09-21 2907.29
09-22 3046.38
09-23 2824.29
09-24 2943.5
09-25 3134.57
09-26 3358.86
09-27 3194.07
09-28 3231.79
09-29 3219.79
09-30 3453.77
10-01 2480.25
10-02 2447.23
10-03 2455.62
10-04 2560.08
10-05 3631.21
10-06 3442.5
10-07 3696.71
10-08 3968.64
10-09 4034.93
10-10 4164.0
10-11 4209.29
10-12 4254.43
10-13 4270.0
10-14 3859.14
10-15 4314.08
10-16 2854.69
10-17 3745.0
10-18 3585.79
10-19 3284.64
10-20 3148.07
10-21 2028.62
10-22 2848.64
10-23 2903.36
10-24 2764.93
10-25 3019.36
10-26 2694.07
10-27 2778.07
10-28 2535.21
10-29 2730.93
10-30 2700.21
10-31 2771.29
11-01 2739.64
11-02 2797.08
11-03 2684.36
11-04 2555.43
11-05 2481.5
11-06 2198.54
11-07 2213.0
11-08 2165.54
11-09 1635.0
11-10 1942.69
11-11 2093.0
11-12 2007.08
11-13 1999.31
11-14 2202.77
11-15 2102.43
11-16 2081.21
11-17 2125.21
11-18 1961.85
11-19 1823.77
11-20 1633.17
11-21 1928.31
11-22 2212.92
11-23 2117.29
11-24 2104.23
11-25 2083.08
11-26 2001.93
11-27 2038.29
11-28 1703.92
11-29 2306.86
11-30 2185.57
12-01 2249.86
12-02 2156.43
12-03 2107.14
12-04 2320.0
12-05 2406.38
12-06 2135.0
12-07 2202.92
12-08 1941.0
12-09 2189.77
12-10 2064.15
12-11 1909.15
12-12 1963.85
12-13 1893.21
12-14 1190.15
12-15 1108.0
12-16 1146.54
12-17 1938.54
12-18 1820.33
12-19 2016.55
12-20 1440.22
12-21 1585.2
12-22 2581.0
12-23 2645.91
12-24 2791.09
12-25 2769.27
12-26 2754.82
12-27 3048.4
12-28 2981.0
12-29 1898.7
12-30 3303.45
12-31 3212.08

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index