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Hydrograph River at a Glance Download Inundation
Mapping
Winnebago River (Northern IA) at Mason City Stage (ft)Flow (cfs)Observed: 5.83 ft at 8:00PM May 18, 2022Observed: 5.88 ft at 8:15PM May 18, 2022Observed: 5.9 ft at 8:30PM May 18, 2022Observed: 5.88 ft at 8:45PM May 18, 2022Observed: 5.9 ft at 9:00PM May 18, 2022Observed: 5.87 ft at 9:15PM May 18, 2022Observed: 5.89 ft at 9:30PM May 18, 2022Observed: 5.82 ft at 9:45PM May 18, 2022Observed: 5.88 ft at 10:00PM May 18, 2022Observed: 5.89 ft at 10:15PM May 18, 2022Highest Observation: 5.91 ft at 10:30PM May 18, 2022Observed: 5.88 ft at 10:45PM May 18, 2022Observed: 5.85 ft at 11:00PM May 18, 2022Observed: 5.89 ft at 11:15PM May 18, 2022Observed: 5.85 ft at 11:30PM May 18, 2022Observed: 5.86 ft at 11:45PM May 18, 2022Observed: 5.84 ft at 12:00AM May 19, 2022Observed: 5.83 ft at 12:15AM May 19, 2022Observed: 5.88 ft at 12:30AM May 19, 2022Observed: 5.89 ft at 12:45AM May 19, 2022Observed: 5.89 ft at 1:00AM May 19, 2022Observed: 5.88 ft at 1:15AM May 19, 2022Observed: 5.86 ft at 1:30AM May 19, 2022Observed: 5.84 ft at 1:45AM May 19, 2022Observed: 5.85 ft at 2:00AM May 19, 2022Observed: 5.87 ft at 2:15AM May 19, 2022Observed: 5.86 ft at 2:30AM May 19, 2022Observed: 5.85 ft at 2:45AM May 19, 2022Observed: 5.9 ft at 3:00AM May 19, 2022Observed: 5.89 ft at 3:15AM May 19, 2022Observed: 5.84 ft at 3:30AM May 19, 2022Observed: 5.88 ft at 3:45AM May 19, 2022Observed: 5.84 ft at 4:00AM May 19, 2022Observed: 5.83 ft at 4:15AM May 19, 2022Observed: 5.88 ft at 4:30AM May 19, 2022Observed: 5.82 ft at 4:45AM May 19, 2022Observed: 5.86 ft at 5:00AM May 19, 2022Observed: 5.85 ft at 5:15AM May 19, 2022Observed: 5.86 ft at 5:30AM May 19, 2022Observed: 5.81 ft at 5:45AM May 19, 2022Observed: 5.86 ft at 6:00AM May 19, 2022Observed: 5.8 ft at 6:15AM May 19, 2022Observed: 5.86 ft at 6:30AM May 19, 2022Observed: 5.86 ft at 6:45AM May 19, 2022Observed: 5.86 ft at 7:00AM May 19, 2022Observed: 5.83 ft at 7:15AM May 19, 2022Observed: 5.88 ft at 7:30AM May 19, 2022Observed: 5.82 ft at 7:45AM May 19, 2022Observed: 5.83 ft at 8:00AM May 19, 2022Observed: 5.82 ft at 8:15AM May 19, 2022Observed: 5.8 ft at 8:30AM May 19, 2022Observed: 5.85 ft at 8:45AM May 19, 2022Observed: 5.87 ft at 9:00AM May 19, 2022Observed: 5.9 ft at 9:15AM May 19, 2022Observed: 5.88 ft at 9:30AM May 19, 2022Observed: 5.82 ft at 9:45AM May 19, 2022Observed: 5.88 ft at 10:00AM May 19, 2022Observed: 5.81 ft at 10:15AM May 19, 2022Observed: 5.82 ft at 10:30AM May 19, 2022Observed: 5.82 ft at 10:45AM May 19, 2022Observed: 5.86 ft at 11:00AM May 19, 2022Observed: 5.84 ft at 11:15AM May 19, 2022Observed: 5.88 ft at 11:30AM May 19, 2022Observed: 5.84 ft at 11:45AM May 19, 2022Observed: 5.85 ft at 12:00PM May 19, 2022Observed: 5.87 ft at 12:15PM May 19, 2022Observed: 5.81 ft at 12:30PM May 19, 2022Observed: 5.83 ft at 12:45PM May 19, 2022Observed: 5.83 ft at 1:00PM May 19, 2022Observed: 5.83 ft at 1:15PM May 19, 2022Observed: 5.82 ft at 1:30PM May 19, 2022Observed: 5.81 ft at 1:45PM May 19, 2022Observed: 5.82 ft at 2:00PM May 19, 2022Observed: 5.81 ft at 2:15PM May 19, 2022Observed: 5.82 ft at 2:30PM May 19, 2022Observed: 5.8 ft at 2:45PM May 19, 2022Observed: 5.78 ft at 3:00PM May 19, 2022Observed: 5.8 ft at 3:15PM May 19, 2022Observed: 5.81 ft at 3:30PM May 19, 2022Observed: 5.79 ft at 3:45PM May 19, 2022Observed: 5.81 ft at 4:00PM May 19, 2022Observed: 5.8 ft at 4:15PM May 19, 2022Observed: 5.79 ft at 4:30PM May 19, 2022Observed: 5.81 ft at 4:45PM May 19, 2022Observed: 5.79 ft at 5:00PM May 19, 2022Observed: 5.8 ft at 5:15PM May 19, 2022Observed: 5.77 ft at 5:30PM May 19, 2022Observed: 5.81 ft at 5:45PM May 19, 2022Observed: 5.82 ft at 6:00PM May 19, 2022Observed: 5.79 ft at 6:15PM May 19, 2022Observed: 5.83 ft at 6:30PM May 19, 2022Observed: 5.79 ft at 6:45PM May 19, 2022Observed: 5.81 ft at 7:00PM May 19, 2022Observed: 5.82 ft at 7:15PM May 19, 2022Observed: 5.8 ft at 7:30PM May 19, 2022Observed: 5.82 ft at 7:45PM May 19, 2022Observed: 5.81 ft at 8:00PM May 19, 2022Observed: 5.81 ft at 8:15PM May 19, 2022Observed: 5.84 ft at 8:30PM May 19, 2022Observed: 5.79 ft at 8:45PM May 19, 2022Observed: 5.81 ft at 9:00PM May 19, 2022Observed: 5.81 ft at 9:15PM May 19, 2022Observed: 5.82 ft at 9:30PM May 19, 2022Observed: 5.79 ft at 9:45PM May 19, 2022Observed: 5.81 ft at 10:00PM May 19, 2022Observed: 5.82 ft at 10:15PM May 19, 2022Observed: 5.81 ft at 10:30PM May 19, 2022Observed: 5.8 ft at 10:45PM May 19, 2022Observed: 5.81 ft at 11:00PM May 19, 2022Observed: 5.83 ft at 11:15PM May 19, 2022Observed: 5.82 ft at 11:30PM May 19, 2022Observed: 5.81 ft at 11:45PM May 19, 2022Observed: 5.81 ft at 12:00AM May 20, 2022Observed: 5.81 ft at 12:15AM May 20, 2022Observed: 5.81 ft at 12:30AM May 20, 2022Observed: 5.84 ft at 12:45AM May 20, 2022Observed: 5.84 ft at 1:00AM May 20, 2022Observed: 5.86 ft at 1:15AM May 20, 2022Observed: 5.82 ft at 1:30AM May 20, 2022Observed: 5.81 ft at 1:45AM May 20, 2022Observed: 5.81 ft at 2:00AM May 20, 2022Observed: 5.84 ft at 2:15AM May 20, 2022Observed: 5.81 ft at 2:30AM May 20, 2022Observed: 5.83 ft at 2:45AM May 20, 2022Observed: 5.85 ft at 3:00AM May 20, 2022Observed: 5.83 ft at 3:15AM May 20, 2022Observed: 5.83 ft at 3:30AM May 20, 2022Observed: 5.84 ft at 3:45AM May 20, 2022Observed: 5.82 ft at 4:00AM May 20, 2022Observed: 5.81 ft at 4:15AM May 20, 2022Observed: 5.81 ft at 4:30AM May 20, 2022Observed: 5.82 ft at 4:45AM May 20, 2022Observed: 5.81 ft at 5:00AM May 20, 2022Observed: 5.82 ft at 5:15AM May 20, 2022Observed: 5.81 ft at 5:30AM May 20, 2022Observed: 5.83 ft at 5:45AM May 20, 2022Observed: 5.83 ft at 6:00AM May 20, 2022Observed: 5.82 ft at 6:15AM May 20, 2022Observed: 5.84 ft at 6:30AM May 20, 2022Observed: 5.84 ft at 6:45AM May 20, 2022Observed: 5.81 ft at 7:00AM May 20, 2022Observed: 5.84 ft at 7:15AM May 20, 2022Observed: 5.81 ft at 7:30AM May 20, 2022Observed: 5.83 ft at 7:45AM May 20, 2022Observed: 5.83 ft at 8:00AM May 20, 2022Observed: 5.83 ft at 8:15AM May 20, 2022Observed: 5.8 ft at 8:30AM May 20, 2022Observed: 5.81 ft at 8:45AM May 20, 2022Observed: 5.8 ft at 9:00AM May 20, 2022Observed: 5.82 ft at 9:15AM May 20, 2022Observed: 5.79 ft at 9:30AM May 20, 2022Observed: 5.79 ft at 9:45AM May 20, 2022Observed: 5.8 ft at 10:00AM May 20, 2022Observed: 5.79 ft at 10:15AM May 20, 2022Observed: 5.8 ft at 10:30AM May 20, 2022Observed: 5.8 ft at 10:45AM May 20, 2022Observed: 5.81 ft at 11:00AM May 20, 2022Observed: 5.8 ft at 11:15AM May 20, 2022Observed: 5.79 ft at 11:30AM May 20, 2022Observed: 5.81 ft at 11:45AM May 20, 2022Observed: 5.8 ft at 12:00PM May 20, 2022Observed: 5.78 ft at 12:15PM May 20, 2022Observed: 5.77 ft at 12:30PM May 20, 2022Observed: 5.78 ft at 12:45PM May 20, 2022Observed: 5.79 ft at 1:00PM May 20, 2022Observed: 5.81 ft at 1:15PM May 20, 2022Observed: 5.79 ft at 1:30PM May 20, 2022Observed: 5.8 ft at 1:45PM May 20, 2022Observed: 5.78 ft at 2:00PM May 20, 2022Observed: 5.79 ft at 2:15PM May 20, 2022Observed: 5.81 ft at 2:30PM May 20, 2022Observed: 5.77 ft at 2:45PM May 20, 2022Observed: 5.78 ft at 3:00PM May 20, 2022Observed: 5.79 ft at 3:15PM May 20, 2022Observed: 5.8 ft at 3:30PM May 20, 2022Observed: 5.8 ft at 3:45PM May 20, 2022Observed: 5.8 ft at 4:00PM May 20, 2022Observed: 5.81 ft at 4:15PM May 20, 2022Observed: 5.82 ft at 4:30PM May 20, 2022Observed: 5.78 ft at 4:45PM May 20, 2022Observed: 5.8 ft at 5:00PM May 20, 2022Observed: 5.82 ft at 5:15PM May 20, 2022Observed: 5.79 ft at 5:30PM May 20, 2022Observed: 5.79 ft at 5:45PM May 20, 2022Observed: 5.79 ft at 6:00PM May 20, 2022Observed: 5.81 ft at 6:15PM May 20, 2022Observed: 5.81 ft at 6:30PM May 20, 2022Observed: 5.78 ft at 6:45PM May 20, 2022Observed: 5.81 ft at 7:00PM May 20, 2022Observed: 5.81 ft at 7:15PM May 20, 2022Observed: 5.79 ft at 7:30PM May 20, 2022Observed: 5.79 ft at 7:45PM May 20, 2022Observed: 5.78 ft at 8:00PM May 20, 2022Observed: 5.8 ft at 8:15PM May 20, 2022Observed: 5.79 ft at 8:30PM May 20, 2022Observed: 5.78 ft at 8:45PM May 20, 2022Observed: 5.81 ft at 9:00PM May 20, 2022Observed: 5.81 ft at 9:15PM May 20, 2022Observed: 5.78 ft at 9:30PM May 20, 2022Observed: 5.81 ft at 11:45PM May 20, 2022Observed: 5.81 ft at 12:00AM May 21, 2022Observed: 5.82 ft at 12:15AM May 21, 2022Observed: 5.78 ft at 12:30AM May 21, 2022Observed: 5.79 ft at 12:45AM May 21, 2022Observed: 5.79 ft at 1:00AM May 21, 2022Observed: 5.79 ft at 1:15AM May 21, 2022Observed: 5.77 ft at 1:30AM May 21, 2022Observed: 5.76 ft at 1:45AM May 21, 2022Observed: 5.77 ft at 2:00AM May 21, 2022Observed: 5.77 ft at 2:15AM May 21, 2022Observed: 5.75 ft at 2:30AM May 21, 2022Observed: 5.78 ft at 2:45AM May 21, 2022Observed: 5.76 ft at 3:00AM May 21, 2022Observed: 5.76 ft at 3:15AM May 21, 2022Observed: 5.76 ft at 3:30AM May 21, 2022Observed: 5.75 ft at 3:45AM May 21, 2022Observed: 5.76 ft at 4:00AM May 21, 2022Observed: 5.76 ft at 4:15AM May 21, 2022Observed: 5.77 ft at 4:30AM May 21, 2022Observed: 5.76 ft at 4:45AM May 21, 2022Observed: 5.77 ft at 5:00AM May 21, 2022Observed: 5.8 ft at 5:15AM May 21, 2022Observed: 5.76 ft at 5:30AM May 21, 2022Observed: 5.74 ft at 5:45AM May 21, 2022Observed: 5.79 ft at 6:00AM May 21, 2022Observed: 5.78 ft at 6:15AM May 21, 2022Observed: 5.77 ft at 6:30AM May 21, 2022Observed: 5.75 ft at 6:45AM May 21, 2022Observed: 5.74 ft at 7:00AM May 21, 2022Observed: 5.79 ft at 7:15AM May 21, 2022Observed: 5.76 ft at 7:30AM May 21, 2022Observed: 5.75 ft at 7:45AM May 21, 2022Observed: 5.79 ft at 8:00AM May 21, 2022Observed: 5.78 ft at 8:15AM May 21, 2022Observed: 5.75 ft at 8:30AM May 21, 2022Observed: 5.79 ft at 8:45AM May 21, 2022Observed: 5.77 ft at 9:00AM May 21, 2022Observed: 5.79 ft at 9:15AM May 21, 2022Observed: 5.76 ft at 9:30AM May 21, 2022Observed: 5.76 ft at 9:45AM May 21, 2022Observed: 5.8 ft at 10:00AM May 21, 2022Observed: 5.78 ft at 10:15AM May 21, 2022Observed: 5.76 ft at 10:30AM May 21, 2022Observed: 5.8 ft at 10:45AM May 21, 2022Observed: 5.78 ft at 11:00AM May 21, 2022Observed: 5.77 ft at 11:15AM May 21, 2022Observed: 5.79 ft at 11:30AM May 21, 2022Observed: 5.76 ft at 11:45AM May 21, 2022Observed: 5.78 ft at 12:00PM May 21, 2022Observed: 5.78 ft at 12:15PM May 21, 2022Observed: 5.8 ft at 12:30PM May 21, 2022Observed: 5.79 ft at 12:45PM May 21, 2022Observed: 5.77 ft at 1:00PM May 21, 2022Observed: 5.78 ft at 1:15PM May 21, 2022Observed: 5.81 ft at 1:30PM May 21, 2022Observed: 5.78 ft at 1:45PM May 21, 2022Observed: 5.79 ft at 2:00PM May 21, 2022Observed: 5.75 ft at 2:15PM May 21, 2022Observed: 5.81 ft at 2:30PM May 21, 2022Observed: 5.8 ft at 2:45PM May 21, 2022Observed: 5.8 ft at 3:00PM May 21, 2022Observed: 5.81 ft at 3:15PM May 21, 2022Observed: 5.79 ft at 3:30PM May 21, 2022Observed: 5.8 ft at 3:45PM May 21, 2022Observed: 5.81 ft at 4:00PM May 21, 2022Observed: 5.77 ft at 4:15PM May 21, 2022Observed: 5.79 ft at 4:30PM May 21, 2022Observed: 5.75 ft at 4:45PM May 21, 2022Observed: 5.79 ft at 5:00PM May 21, 2022Observed: 5.78 ft at 5:15PM May 21, 2022Observed: 5.77 ft at 5:30PM May 21, 2022Observed: 5.8 ft at 5:45PM May 21, 2022Observed: 5.76 ft at 6:00PM May 21, 2022Observed: 5.77 ft at 6:15PM May 21, 2022Observed: 5.77 ft at 6:30PM May 21, 2022Observed: 5.75 ft at 6:45PM May 21, 2022Observed: 5.75 ft at 7:00PM May 21, 2022Observed: 5.76 ft at 7:15PM May 21, 2022Observed: 5.77 ft at 7:30PM May 21, 2022Observed: 5.76 ft at 7:45PM May 21, 2022Observed: 5.77 ft at 8:00PM May 21, 2022Observed: 5.76 ft at 8:15PM May 21, 2022Observed: 5.78 ft at 8:30PM May 21, 2022Observed: 5.77 ft at 8:45PM May 21, 2022Observed: 5.77 ft at 9:00PM May 21, 2022Observed: 5.77 ft at 9:15PM May 21, 2022Observed: 5.79 ft at 9:30PM May 21, 2022Observed: 5.76 ft at 9:45PM May 21, 2022Observed: 5.77 ft at 10:00PM May 21, 2022Observed: 5.76 ft at 10:15PM May 21, 2022Observed: 5.77 ft at 10:30PM May 21, 2022Observed: 5.75 ft at 10:45PM May 21, 2022Observed: 5.76 ft at 11:00PM May 21, 2022Observed: 5.77 ft at 11:15PM May 21, 2022Observed: 5.75 ft at 11:30PM May 21, 2022Observed: 5.75 ft at 11:45PM May 21, 2022Observed: 5.78 ft at 12:00AM May 22, 2022Observed: 5.78 ft at 12:15AM May 22, 2022Observed: 5.78 ft at 12:30AM May 22, 2022Observed: 5.77 ft at 12:45AM May 22, 2022Observed: 5.78 ft at 1:00AM May 22, 2022Observed: 5.78 ft at 1:15AM May 22, 2022Observed: 5.76 ft at 1:30AM May 22, 2022Observed: 5.75 ft at 1:45AM May 22, 2022Observed: 5.76 ft at 2:00AM May 22, 2022Observed: 5.78 ft at 2:15AM May 22, 2022Observed: 5.75 ft at 2:30AM May 22, 2022Observed: 5.76 ft at 2:45AM May 22, 2022Observed: 5.75 ft at 3:00AM May 22, 2022Observed: 5.77 ft at 3:15AM May 22, 2022Observed: 5.74 ft at 3:30AM May 22, 2022Observed: 5.75 ft at 3:45AM May 22, 2022Observed: 5.74 ft at 4:00AM May 22, 2022Observed: 5.75 ft at 4:15AM May 22, 2022Observed: 5.78 ft at 4:30AM May 22, 2022Observed: 5.76 ft at 4:45AM May 22, 2022Observed: 5.78 ft at 5:00AM May 22, 2022Observed: 5.76 ft at 5:15AM May 22, 2022Observed: 5.73 ft at 5:30AM May 22, 2022Observed: 5.77 ft at 5:45AM May 22, 2022Observed: 5.74 ft at 6:00AM May 22, 2022Observed: 5.74 ft at 6:15AM May 22, 2022Observed: 5.77 ft at 6:30AM May 22, 2022Observed: 5.78 ft at 6:45AM May 22, 2022Observed: 5.77 ft at 7:00AM May 22, 2022Observed: 5.78 ft at 7:15AM May 22, 2022Observed: 5.76 ft at 7:30AM May 22, 2022Observed: 5.75 ft at 7:45AM May 22, 2022Observed: 5.75 ft at 8:00AM May 22, 2022Observed: 5.77 ft at 8:15AM May 22, 2022Observed: 5.75 ft at 8:30AM May 22, 2022Observed: 5.74 ft at 8:45AM May 22, 2022Observed: 5.77 ft at 9:00AM May 22, 2022Observed: 5.76 ft at 9:15AM May 22, 2022Observed: 5.78 ft at 9:30AM May 22, 2022Observed: 5.76 ft at 9:45AM May 22, 2022Observed: 5.77 ft at 10:00AM May 22, 2022Observed: 5.79 ft at 10:15AM May 22, 2022Observed: 5.76 ft at 10:30AM May 22, 2022Observed: 5.76 ft at 10:45AM May 22, 2022Observed: 5.74 ft at 11:00AM May 22, 2022Observed: 5.75 ft at 11:15AM May 22, 2022Observed: 5.77 ft at 11:30AM May 22, 2022Observed: 5.79 ft at 11:45AM May 22, 2022Observed: 5.75 ft at 12:00PM May 22, 2022Observed: 5.77 ft at 12:15PM May 22, 2022Observed: 5.78 ft at 12:30PM May 22, 2022Observed: 5.74 ft at 12:45PM May 22, 2022Observed: 5.77 ft at 1:00PM May 22, 2022Observed: 5.75 ft at 1:15PM May 22, 2022Observed: 5.76 ft at 1:30PM May 22, 2022Observed: 5.73 ft at 1:45PM May 22, 2022Observed: 5.77 ft at 2:00PM May 22, 2022Observed: 5.74 ft at 2:15PM May 22, 2022Observed: 5.77 ft at 2:30PM May 22, 2022Observed: 5.74 ft at 2:45PM May 22, 2022Observed: 5.77 ft at 3:00PM May 22, 2022Observed: 5.78 ft at 3:15PM May 22, 2022Observed: 5.77 ft at 3:30PM May 22, 2022Observed: 5.73 ft at 3:45PM May 22, 2022Observed: 5.79 ft at 4:00PM May 22, 2022Observed: 5.74 ft at 4:15PM May 22, 2022Observed: 5.76 ft at 4:30PM May 22, 2022Observed: 5.75 ft at 4:45PM May 22, 2022Observed: 5.74 ft at 5:00PM May 22, 2022Observed: 5.76 ft at 5:15PM May 22, 2022Observed: 5.74 ft at 5:30PM May 22, 2022Observed: 5.74 ft at 5:45PM May 22, 2022Observed: 5.74 ft at 6:00PM May 22, 2022Observed: 5.75 ft at 6:15PM May 22, 2022Observed: 5.75 ft at 6:30PM May 22, 2022Observed: 5.75 ft at 6:45PM May 22, 2022Observed: 5.74 ft at 7:00PM May 22, 2022Observed: 5.75 ft at 7:15PM May 22, 2022Observed: 5.74 ft at 7:30PM May 22, 2022Observed: 5.76 ft at 7:45PM May 22, 2022Observed: 5.75 ft at 8:00PM May 22, 2022Observed: 5.76 ft at 8:15PM May 22, 2022Observed: 5.74 ft at 8:30PM May 22, 2022Observed: 5.74 ft at 8:45PM May 22, 2022Observed: 5.74 ft at 9:00PM May 22, 2022Observed: 5.74 ft at 9:15PM May 22, 2022Observed: 5.77 ft at 9:30PM May 22, 2022Observed: 5.76 ft at 9:45PM May 22, 2022Observed: 5.75 ft at 10:00PM May 22, 2022Observed: 5.74 ft at 10:15PM May 22, 2022Observed: 5.73 ft at 10:30PM May 22, 2022Observed: 5.75 ft at 10:45PM May 22, 2022Observed: 5.75 ft at 11:00PM May 22, 2022Observed: 5.74 ft at 11:15PM May 22, 2022Observed: 5.74 ft at 11:30PM May 22, 2022Observed: 5.73 ft at 11:45PM May 22, 2022Observed: 5.75 ft at 12:00AM May 23, 2022Observed: 5.74 ft at 12:15AM May 23, 2022Observed: 5.76 ft at 12:30AM May 23, 2022Observed: 5.75 ft at 12:45AM May 23, 2022Observed: 5.73 ft at 1:00AM May 23, 2022Observed: 5.73 ft at 1:15AM May 23, 2022Observed: 5.75 ft at 1:30AM May 23, 2022Observed: 5.75 ft at 1:45AM May 23, 2022Observed: 5.73 ft at 2:00AM May 23, 2022Observed: 5.76 ft at 2:15AM May 23, 2022Observed: 5.74 ft at 2:30AM May 23, 2022Observed: 5.76 ft at 2:45AM May 23, 2022Observed: 5.75 ft at 3:00AM May 23, 2022Observed: 5.75 ft at 3:15AM May 23, 2022Observed: 5.74 ft at 3:30AM May 23, 2022Observed: 5.76 ft at 3:45AM May 23, 2022Observed: 5.74 ft at 4:00AM May 23, 2022Observed: 5.75 ft at 4:15AM May 23, 2022Observed: 5.72 ft at 4:30AM May 23, 2022Observed: 5.74 ft at 4:45AM May 23, 2022Observed: 5.74 ft at 5:00AM May 23, 2022Observed: 5.75 ft at 5:15AM May 23, 2022Observed: 5.74 ft at 5:30AM May 23, 2022Observed: 5.73 ft at 5:45AM May 23, 2022Observed: 5.74 ft at 6:00AM May 23, 2022Observed: 5.72 ft at 6:15AM May 23, 2022Observed: 5.74 ft at 6:30AM May 23, 2022Observed: 5.74 ft at 6:45AM May 23, 2022Observed: 5.75 ft at 7:00AM May 23, 2022Observed: 5.73 ft at 7:15AM May 23, 2022Observed: 5.72 ft at 7:30AM May 23, 2022Observed: 5.72 ft at 7:45AM May 23, 2022Observed: 5.74 ft at 8:00AM May 23, 2022Observed: 5.73 ft at 8:15AM May 23, 2022Observed: 5.76 ft at 8:30AM May 23, 2022Observed: 5.72 ft at 8:45AM May 23, 2022Observed: 5.73 ft at 9:00AM May 23, 2022Observed: 5.74 ft at 9:15AM May 23, 2022Observed: 5.75 ft at 9:30AM May 23, 2022Observed: 5.72 ft at 9:45AM May 23, 2022Observed: 5.75 ft at 10:00AM May 23, 2022Observed: 5.74 ft at 10:15AM May 23, 2022Observed: 5.74 ft at 10:30AM May 23, 2022Observed: 5.72 ft at 10:45AM May 23, 2022Observed: 5.76 ft at 11:00AM May 23, 2022Observed: 5.77 ft at 11:15AM May 23, 2022Observed: 5.74 ft at 11:30AM May 23, 2022Observed: 5.75 ft at 11:45AM May 23, 2022Observed: 5.75 ft at 12:00PM May 23, 2022Observed: 5.74 ft at 12:15PM May 23, 2022Observed: 5.76 ft at 12:30PM May 23, 2022Observed: 5.72 ft at 12:45PM May 23, 2022Observed: 5.75 ft at 1:00PM May 23, 2022Observed: 5.74 ft at 1:15PM May 23, 2022Observed: 5.74 ft at 1:30PM May 23, 2022Observed: 5.75 ft at 1:45PM May 23, 2022Observed: 5.74 ft at 2:00PM May 23, 2022Observed: 5.72 ft at 2:15PM May 23, 2022Observed: 5.74 ft at 2:30PM May 23, 2022Observed: 5.73 ft at 2:45PM May 23, 2022Observed: 5.73 ft at 3:00PM May 23, 2022Observed: 5.73 ft at 3:15PM May 23, 2022Observed: 5.75 ft at 3:30PM May 23, 2022Observed: 5.74 ft at 3:45PM May 23, 2022Observed: 5.75 ft at 4:00PM May 23, 2022Observed: 5.75 ft at 4:15PM May 23, 2022Observed: 5.73 ft at 4:30PM May 23, 2022Observed: 5.75 ft at 4:45PM May 23, 2022Observed: 5.73 ft at 5:00PM May 23, 2022Observed: 5.76 ft at 5:15PM May 23, 2022Observed: 5.73 ft at 5:30PM May 23, 2022Observed: 5.74 ft at 5:45PM May 23, 2022Observed: 5.74 ft at 6:00PM May 23, 2022Observed: 5.72 ft at 6:15PM May 23, 2022Observed: 5.74 ft at 6:30PM May 23, 2022Observed: 5.71 ft at 6:45PM May 23, 2022Observed: 5.72 ft at 7:00PM May 23, 2022Observed: 5.73 ft at 7:15PM May 23, 2022Observed: 5.72 ft at 7:30PM May 23, 2022USGS--Water Resources of the United StatesMCWI4(plotting HGIRG) Graph Created (7:48PM May 23, 2022)ObservedLatest observed value: 5.72 ft at 7:30 PM CDT 23-May-2022. Flood Stage is 10 ft
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Tabular Data (UTC)
Tabular Data (CDT)
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Metadata
NOTE: Forecasts for the Winnebago River (Northern IA) at Mason City are issued as needed during times of high water, but are not routinely available.
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Upstream Gauge - near Mason City US 65 Upstream Gauge Downstream Gauge Downstream Gauge - near Rockford
Flood Categories (in feet)
Major Flood Stage: 15.5
Moderate Flood Stage: 14.5
Flood Stage: 10
Action Stage: 6
Low Stage (in feet): -9999

Historic Crests
(1) 18.74 ft on 06/08/2008
(2) 14.80 ft on 03/27/1961
(3) 14.67 ft on 05/22/2004
(4) 14.27 ft on 04/11/1965
(5) 14.07 ft on 09/22/2016
(6) 13.70 ft on 04/06/1965
(7) 13.06 ft on 08/31/1962
(8) 12.59 ft on 04/01/1993
(9) 12.44 ft on 04/07/1951
(10) 12.30 ft on 05/23/2004
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 10.42 ft on 03/20/2019
(2) 10.54 ft on 03/17/2019
(3) 12.17 ft on 09/21/2018
(4) 7.14 ft on 02/21/2017
(5) 14.07 ft on 09/22/2016
(6) 8.82 ft on 09/16/2016
(7) 7.82 ft on 09/10/2016
(8) 9.65 ft on 09/07/2016
(9) 9.29 ft on 08/24/2016
(10) 8.64 ft on 07/17/2016
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2.68 ft on 10/01/1988

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:14
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Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
20.5 Water overtops the floodwall at the water treatment plant...located at 13th St NE.
17.4 Water reaches bottom of railroad bridge east of Kentucky Avenue bridge.
15 This is the approximate top of levee protection. Levees run from the 12th Street Northeast bridge to 9th Street along the east bank and also from 8th Street to 6th and Hampshire Streets.
14 Water may flow over the city dikes.
12 Widespread flooding occurs along the river. Some backwater effects are possible along Willow Creek between downtown Mason City and the confluence with the Winnebago river.
11 Sandbagging occurs on the dike from 12th Street Northeast to Carolina Street.
10 There is widespread flooding of city parks and water reaches the underside of the 12th Street Northeast bridge at the piers.
8 East and west city parks are affected in the 12th Street Northeast area.
7 Low lying areas along the river are affected.
About This Location Collapse

Latitude: 43.164962° N, Longitude: 93.192703° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 10 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 1069.59 ft Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
Additional Information Collapse
  • USGS 7-Day Streamflow Duration Hydrograph for this location:
    Duration Hydrograph

    Duration Hydrograph Legend


  • USGS Cumulative Streamflow Hydrograph for this location:
    Duration Hydrograph of Cumulative Streamflow
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Hydrologic Resources Additional Resources
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Des Moines Weather Forecast Office
9607 NW Beaver Dr.
Des Moines, IA 50131
(515) 270-2614
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