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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.



Hydrograph River at a Glance Download
Big Sioux River at Sioux City Stage (ft)Flow (cfs)Observed: 10.76 ft at 8:30AM May 27, 2023Highest Observation: 10.8 ft at 8:45AM May 27, 2023Highest Observation: 10.8 ft at 9:00AM May 27, 2023Highest Observation: 10.8 ft at 9:15AM May 27, 2023Observed: 10.78 ft at 9:30AM May 27, 2023Observed: 10.78 ft at 9:45AM May 27, 2023Observed: 10.76 ft at 10:00AM May 27, 2023Observed: 10.78 ft at 10:15AM May 27, 2023Highest Observation: 10.8 ft at 10:30AM May 27, 2023Observed: 10.79 ft at 10:45AM May 27, 2023Observed: 10.78 ft at 11:00AM May 27, 2023Observed: 10.78 ft at 11:02AM May 27, 2023Highest Observation: 10.8 ft at 11:15AM May 27, 2023Highest Observation: 10.8 ft at 11:17AM May 27, 2023Observed: 10.79 ft at 11:30AM May 27, 2023Observed: 10.79 ft at 11:32AM May 27, 2023Observed: 10.79 ft at 11:45AM May 27, 2023Observed: 10.77 ft at 12:00PM May 27, 2023Observed: 10.79 ft at 12:15PM May 27, 2023Observed: 10.78 ft at 12:30PM May 27, 2023Observed: 10.78 ft at 12:45PM May 27, 2023Observed: 10.78 ft at 1:00PM May 27, 2023Observed: 10.78 ft at 1:15PM May 27, 2023Observed: 10.75 ft at 1:30PM May 27, 2023Observed: 10.79 ft at 1:45PM May 27, 2023Observed: 10.76 ft at 2:00PM May 27, 2023Observed: 10.77 ft at 2:15PM May 27, 2023Observed: 10.77 ft at 2:30PM May 27, 2023Observed: 10.76 ft at 2:45PM May 27, 2023Observed: 10.77 ft at 3:00PM May 27, 2023Observed: 10.78 ft at 3:15PM May 27, 2023Observed: 10.79 ft at 3:30PM May 27, 2023Observed: 10.79 ft at 3:45PM May 27, 2023Observed: 10.78 ft at 4:00PM May 27, 2023Observed: 10.79 ft at 4:15PM May 27, 2023Observed: 10.78 ft at 4:30PM May 27, 2023Highest Observation: 10.8 ft at 4:45PM May 27, 2023Observed: 10.77 ft at 5:00PM May 27, 2023Observed: 10.76 ft at 5:15PM May 27, 2023Observed: 10.77 ft at 5:30PM May 27, 2023Observed: 10.77 ft at 5:45PM May 27, 2023Observed: 10.74 ft at 6:00PM May 27, 2023Observed: 10.77 ft at 6:15PM May 27, 2023Observed: 10.76 ft at 6:30PM May 27, 2023Observed: 10.77 ft at 6:45PM May 27, 2023Observed: 10.79 ft at 7:00PM May 27, 2023Observed: 10.79 ft at 7:01PM May 27, 2023Observed: 10.76 ft at 7:15PM May 27, 2023Observed: 10.76 ft at 7:16PM May 27, 2023Observed: 10.76 ft at 7:30PM May 27, 2023Observed: 10.76 ft at 7:31PM May 27, 2023Observed: 10.76 ft at 7:45PM May 27, 2023Observed: 10.76 ft at 8:00PM May 27, 2023Observed: 10.75 ft at 8:15PM May 27, 2023Observed: 10.73 ft at 8:30PM May 27, 2023Observed: 10.75 ft at 8:45PM May 27, 2023Observed: 10.75 ft at 9:00PM May 27, 2023Observed: 10.73 ft at 9:15PM May 27, 2023Observed: 10.77 ft at 9:30PM May 27, 2023Observed: 10.76 ft at 9:45PM May 27, 2023Observed: 10.75 ft at 10:00PM May 27, 2023Observed: 10.74 ft at 10:15PM May 27, 2023Observed: 10.75 ft at 10:30PM May 27, 2023Observed: 10.74 ft at 10:45PM May 27, 2023Observed: 10.75 ft at 11:00PM May 27, 2023Observed: 10.73 ft at 11:15PM May 27, 2023Observed: 10.74 ft at 11:30PM May 27, 2023Observed: 10.74 ft at 11:45PM May 27, 2023Observed: 10.74 ft at 12:00AM May 28, 2023Observed: 10.74 ft at 12:15AM May 28, 2023Observed: 10.73 ft at 12:30AM May 28, 2023Observed: 10.71 ft at 12:45AM May 28, 2023Observed: 10.73 ft at 1:00AM May 28, 2023Observed: 10.74 ft at 1:15AM May 28, 2023Observed: 10.69 ft at 1:30AM May 28, 2023Observed: 10.72 ft at 1:45AM May 28, 2023Observed: 10.72 ft at 2:00AM May 28, 2023Observed: 10.74 ft at 2:15AM May 28, 2023Observed: 10.74 ft at 2:30AM May 28, 2023Observed: 10.74 ft at 2:45AM May 28, 2023Observed: 10.71 ft at 3:00AM May 28, 2023Observed: 10.72 ft at 3:15AM May 28, 2023Observed: 10.72 ft at 3:30AM May 28, 2023Observed: 10.71 ft at 3:45AM May 28, 2023Observed: 10.73 ft at 4:00AM May 28, 2023Observed: 10.72 ft at 4:15AM May 28, 2023Observed: 10.7 ft at 4:30AM May 28, 2023Observed: 10.73 ft at 4:45AM May 28, 2023Observed: 10.72 ft at 5:00AM May 28, 2023Observed: 10.69 ft at 5:15AM May 28, 2023Observed: 10.73 ft at 5:30AM May 28, 2023Observed: 10.72 ft at 5:45AM May 28, 2023Observed: 10.7 ft at 6:00AM May 28, 2023Observed: 10.71 ft at 6:15AM May 28, 2023Observed: 10.69 ft at 6:30AM May 28, 2023Observed: 10.69 ft at 6:45AM May 28, 2023Observed: 10.7 ft at 7:00AM May 28, 2023Observed: 10.71 ft at 7:15AM May 28, 2023Observed: 10.7 ft at 7:30AM May 28, 2023Observed: 10.7 ft at 7:45AM May 28, 2023Observed: 10.7 ft at 8:00AM May 28, 2023Observed: 10.69 ft at 8:15AM May 28, 2023Observed: 10.68 ft at 8:30AM May 28, 2023Observed: 10.7 ft at 8:45AM May 28, 2023Observed: 10.69 ft at 9:00AM May 28, 2023Observed: 10.68 ft at 9:15AM May 28, 2023Observed: 10.72 ft at 9:30AM May 28, 2023Observed: 10.69 ft at 9:45AM May 28, 2023Observed: 10.69 ft at 10:00AM May 28, 2023Observed: 10.69 ft at 10:15AM May 28, 2023Observed: 10.71 ft at 10:30AM May 28, 2023Observed: 10.69 ft at 10:45AM May 28, 2023Observed: 10.69 ft at 11:00AM May 28, 2023Observed: 10.7 ft at 11:15AM May 28, 2023Observed: 10.7 ft at 11:30AM May 28, 2023Observed: 10.72 ft at 11:45AM May 28, 2023Observed: 10.71 ft at 12:00PM May 28, 2023Observed: 10.72 ft at 12:15PM May 28, 2023Observed: 10.7 ft at 12:30PM May 28, 2023Observed: 10.7 ft at 12:45PM May 28, 2023Observed: 10.72 ft at 1:00PM May 28, 2023Observed: 10.69 ft at 1:15PM May 28, 2023Observed: 10.7 ft at 1:30PM May 28, 2023Observed: 10.71 ft at 1:45PM May 28, 2023Observed: 10.68 ft at 2:00PM May 28, 2023Observed: 10.71 ft at 2:15PM May 28, 2023Observed: 10.69 ft at 2:30PM May 28, 2023Observed: 10.71 ft at 2:45PM May 28, 2023Observed: 10.71 ft at 3:00PM May 28, 2023Observed: 10.69 ft at 3:15PM May 28, 2023Observed: 10.7 ft at 3:30PM May 28, 2023Observed: 10.68 ft at 3:45PM May 28, 2023Observed: 10.69 ft at 4:00PM May 28, 2023Observed: 10.7 ft at 4:15PM May 28, 2023Observed: 10.68 ft at 4:30PM May 28, 2023Observed: 10.68 ft at 4:45PM May 28, 2023Observed: 10.69 ft at 5:00PM May 28, 2023Observed: 10.68 ft at 5:15PM May 28, 2023Observed: 10.68 ft at 5:30PM May 28, 2023Observed: 10.65 ft at 5:45PM May 28, 2023Observed: 10.67 ft at 6:00PM May 28, 2023Observed: 10.68 ft at 6:15PM May 28, 2023Observed: 10.65 ft at 6:30PM May 28, 2023Observed: 10.67 ft at 6:45PM May 28, 2023Observed: 10.67 ft at 7:00PM May 28, 2023Observed: 10.66 ft at 7:15PM May 28, 2023Observed: 10.66 ft at 7:17PM May 28, 2023Observed: 10.65 ft at 7:30PM May 28, 2023Observed: 10.65 ft at 7:32PM May 28, 2023Observed: 10.67 ft at 7:45PM May 28, 2023Observed: 10.67 ft at 7:47PM May 28, 2023Observed: 10.65 ft at 8:00PM May 28, 2023Observed: 10.64 ft at 8:15PM May 28, 2023Observed: 10.63 ft at 8:30PM May 28, 2023Observed: 10.64 ft at 8:45PM May 28, 2023Observed: 10.64 ft at 9:00PM May 28, 2023Observed: 10.64 ft at 9:15PM May 28, 2023Observed: 10.61 ft at 9:30PM May 28, 2023Observed: 10.63 ft at 9:45PM May 28, 2023Observed: 10.61 ft at 10:00PM May 28, 2023Observed: 10.62 ft at 10:15PM May 28, 2023Observed: 10.61 ft at 10:30PM May 28, 2023Observed: 10.64 ft at 10:45PM May 28, 2023Observed: 10.62 ft at 11:00PM May 28, 2023Observed: 10.62 ft at 11:15PM May 28, 2023Observed: 10.6 ft at 11:30PM May 28, 2023Observed: 10.61 ft at 11:45PM May 28, 2023Observed: 10.61 ft at 12:00AM May 29, 2023Observed: 10.61 ft at 12:15AM May 29, 2023Observed: 10.59 ft at 12:30AM May 29, 2023Observed: 10.6 ft at 12:45AM May 29, 2023Observed: 10.59 ft at 1:00AM May 29, 2023Observed: 10.59 ft at 1:15AM May 29, 2023Observed: 10.62 ft at 1:30AM May 29, 2023Observed: 10.6 ft at 1:45AM May 29, 2023Observed: 10.6 ft at 2:00AM May 29, 2023Observed: 10.58 ft at 2:15AM May 29, 2023Observed: 10.58 ft at 2:30AM May 29, 2023Observed: 10.59 ft at 2:45AM May 29, 2023Observed: 10.6 ft at 3:00AM May 29, 2023Observed: 10.59 ft at 3:15AM May 29, 2023Observed: 10.59 ft at 3:17AM May 29, 2023Observed: 10.6 ft at 3:30AM May 29, 2023Observed: 10.6 ft at 3:32AM May 29, 2023Observed: 10.58 ft at 3:45AM May 29, 2023Observed: 10.58 ft at 3:47AM May 29, 2023Observed: 10.59 ft at 4:00AM May 29, 2023Observed: 10.6 ft at 4:15AM May 29, 2023Observed: 10.58 ft at 4:30AM May 29, 2023Observed: 10.58 ft at 4:45AM May 29, 2023Observed: 10.58 ft at 5:00AM May 29, 2023Observed: 10.6 ft at 5:15AM May 29, 2023Observed: 10.6 ft at 5:30AM May 29, 2023Observed: 10.56 ft at 5:45AM May 29, 2023Observed: 10.59 ft at 6:00AM May 29, 2023Observed: 10.59 ft at 6:15AM May 29, 2023Observed: 10.6 ft at 6:30AM May 29, 2023Observed: 10.59 ft at 6:45AM May 29, 2023Observed: 10.58 ft at 7:00AM May 29, 2023Observed: 10.58 ft at 7:15AM May 29, 2023Observed: 10.58 ft at 7:30AM May 29, 2023Observed: 10.58 ft at 7:45AM May 29, 2023Observed: 10.59 ft at 8:00AM May 29, 2023Observed: 10.57 ft at 8:15AM May 29, 2023Observed: 10.59 ft at 8:30AM May 29, 2023Observed: 10.58 ft at 8:45AM May 29, 2023Observed: 10.58 ft at 9:00AM May 29, 2023Observed: 10.59 ft at 9:15AM May 29, 2023Observed: 10.58 ft at 9:30AM May 29, 2023Observed: 10.58 ft at 9:45AM May 29, 2023Observed: 10.59 ft at 10:00AM May 29, 2023Observed: 10.58 ft at 10:15AM May 29, 2023Observed: 10.58 ft at 10:30AM May 29, 2023Observed: 10.58 ft at 10:45AM May 29, 2023Observed: 10.58 ft at 11:00AM May 29, 2023Observed: 10.57 ft at 11:15AM May 29, 2023Observed: 10.57 ft at 11:17AM May 29, 2023Observed: 10.58 ft at 11:30AM May 29, 2023Observed: 10.58 ft at 11:32AM May 29, 2023Observed: 10.56 ft at 11:45AM May 29, 2023Observed: 10.56 ft at 11:47AM May 29, 2023Observed: 10.59 ft at 12:00PM May 29, 2023Observed: 10.58 ft at 12:15PM May 29, 2023Observed: 10.59 ft at 12:30PM May 29, 2023Observed: 10.58 ft at 12:45PM May 29, 2023Observed: 10.58 ft at 1:00PM May 29, 2023Observed: 10.58 ft at 1:15PM May 29, 2023Observed: 10.59 ft at 1:30PM May 29, 2023Observed: 10.6 ft at 1:45PM May 29, 2023Observed: 10.57 ft at 2:00PM May 29, 2023Observed: 10.57 ft at 2:15PM May 29, 2023Observed: 10.59 ft at 2:30PM May 29, 2023Observed: 10.59 ft at 2:45PM May 29, 2023Observed: 10.59 ft at 3:00PM May 29, 2023Observed: 10.58 ft at 3:15PM May 29, 2023Observed: 10.57 ft at 3:30PM May 29, 2023Observed: 10.59 ft at 3:45PM May 29, 2023Observed: 10.59 ft at 4:00PM May 29, 2023Observed: 10.57 ft at 4:15PM May 29, 2023Observed: 10.57 ft at 4:30PM May 29, 2023Observed: 10.59 ft at 4:45PM May 29, 2023Observed: 10.6 ft at 5:00PM May 29, 2023Observed: 10.59 ft at 5:15PM May 29, 2023Observed: 10.57 ft at 5:30PM May 29, 2023Observed: 10.57 ft at 5:45PM May 29, 2023Observed: 10.57 ft at 6:00PM May 29, 2023Observed: 10.58 ft at 6:15PM May 29, 2023Observed: 10.57 ft at 6:30PM May 29, 2023Observed: 10.57 ft at 6:45PM May 29, 2023Observed: 10.56 ft at 7:00PM May 29, 2023Observed: 10.57 ft at 7:15PM May 29, 2023Observed: 10.57 ft at 7:16PM May 29, 2023Observed: 10.57 ft at 7:30PM May 29, 2023Observed: 10.57 ft at 7:31PM May 29, 2023Observed: 10.56 ft at 7:45PM May 29, 2023Observed: 10.56 ft at 7:46PM May 29, 2023Observed: 10.56 ft at 8:00PM May 29, 2023Observed: 10.57 ft at 8:15PM May 29, 2023Observed: 10.56 ft at 8:30PM May 29, 2023Observed: 10.56 ft at 8:45PM May 29, 2023Observed: 10.54 ft at 9:00PM May 29, 2023Observed: 10.53 ft at 9:15PM May 29, 2023Observed: 10.55 ft at 9:30PM May 29, 2023Observed: 10.54 ft at 9:45PM May 29, 2023Observed: 10.52 ft at 10:00PM May 29, 2023Observed: 10.54 ft at 10:15PM May 29, 2023Observed: 10.53 ft at 10:30PM May 29, 2023Observed: 10.55 ft at 10:45PM May 29, 2023Observed: 10.54 ft at 11:00PM May 29, 2023Observed: 10.53 ft at 11:15PM May 29, 2023Observed: 10.54 ft at 11:30PM May 29, 2023Observed: 10.52 ft at 11:45PM May 29, 2023Observed: 10.51 ft at 12:00AM May 30, 2023Observed: 10.53 ft at 12:15AM May 30, 2023Observed: 10.53 ft at 12:30AM May 30, 2023Observed: 10.52 ft at 12:45AM May 30, 2023Observed: 10.51 ft at 1:00AM May 30, 2023Observed: 10.51 ft at 1:15AM May 30, 2023Observed: 10.49 ft at 1:30AM May 30, 2023Observed: 10.51 ft at 1:45AM May 30, 2023Observed: 10.49 ft at 2:00AM May 30, 2023Observed: 10.5 ft at 2:15AM May 30, 2023Observed: 10.5 ft at 2:30AM May 30, 2023Observed: 10.5 ft at 2:45AM May 30, 2023Observed: 10.49 ft at 3:00AM May 30, 2023Observed: 10.48 ft at 3:15AM May 30, 2023Observed: 10.48 ft at 3:16AM May 30, 2023Observed: 10.49 ft at 3:30AM May 30, 2023Observed: 10.49 ft at 3:31AM May 30, 2023Observed: 10.48 ft at 3:45AM May 30, 2023Observed: 10.48 ft at 3:46AM May 30, 2023Observed: 10.48 ft at 4:00AM May 30, 2023Observed: 10.48 ft at 4:15AM May 30, 2023Observed: 10.48 ft at 4:30AM May 30, 2023Observed: 10.49 ft at 4:45AM May 30, 2023Observed: 10.47 ft at 5:00AM May 30, 2023Observed: 10.47 ft at 5:15AM May 30, 2023Observed: 10.48 ft at 5:30AM May 30, 2023Observed: 10.47 ft at 5:45AM May 30, 2023Observed: 10.47 ft at 6:00AM May 30, 2023Observed: 10.46 ft at 6:15AM May 30, 2023Observed: 10.49 ft at 6:30AM May 30, 2023Observed: 10.46 ft at 6:45AM May 30, 2023Observed: 10.46 ft at 7:00AM May 30, 2023Observed: 10.47 ft at 7:15AM May 30, 2023Observed: 10.47 ft at 7:30AM May 30, 2023Observed: 10.47 ft at 7:45AM May 30, 2023Observed: 10.47 ft at 8:00AM May 30, 2023Observed: 10.48 ft at 8:15AM May 30, 2023Observed: 10.47 ft at 8:30AM May 30, 2023Observed: 10.47 ft at 8:45AM May 30, 2023Observed: 10.46 ft at 9:00AM May 30, 2023Observed: 10.47 ft at 9:15AM May 30, 2023Observed: 10.45 ft at 9:30AM May 30, 2023Observed: 10.46 ft at 9:45AM May 30, 2023Observed: 10.48 ft at 10:00AM May 30, 2023Observed: 10.47 ft at 10:15AM May 30, 2023Observed: 10.48 ft at 10:30AM May 30, 2023Observed: 10.48 ft at 10:45AM May 30, 2023Observed: 10.49 ft at 11:00AM May 30, 2023Observed: 10.48 ft at 11:15AM May 30, 2023Observed: 10.48 ft at 11:16AM May 30, 2023Observed: 10.49 ft at 11:30AM May 30, 2023Observed: 10.49 ft at 11:31AM May 30, 2023Observed: 10.47 ft at 11:45AM May 30, 2023Observed: 10.47 ft at 11:46AM May 30, 2023Observed: 10.48 ft at 12:00PM May 30, 2023Observed: 10.48 ft at 12:15PM May 30, 2023Observed: 10.49 ft at 12:30PM May 30, 2023Observed: 10.47 ft at 12:45PM May 30, 2023Observed: 10.48 ft at 1:00PM May 30, 2023Observed: 10.48 ft at 1:15PM May 30, 2023Observed: 10.48 ft at 1:30PM May 30, 2023Observed: 10.49 ft at 1:45PM May 30, 2023Observed: 10.49 ft at 2:00PM May 30, 2023Observed: 10.49 ft at 2:15PM May 30, 2023Observed: 10.48 ft at 2:30PM May 30, 2023Observed: 10.51 ft at 2:45PM May 30, 2023Observed: 10.48 ft at 3:00PM May 30, 2023Observed: 10.49 ft at 3:15PM May 30, 2023Observed: 10.49 ft at 3:30PM May 30, 2023Observed: 10.49 ft at 3:45PM May 30, 2023Observed: 10.49 ft at 4:00PM May 30, 2023Observed: 10.48 ft at 4:15PM May 30, 2023Observed: 10.48 ft at 4:30PM May 30, 2023Observed: 10.48 ft at 4:45PM May 30, 2023Observed: 10.47 ft at 5:00PM May 30, 2023Observed: 10.47 ft at 5:15PM May 30, 2023Observed: 10.47 ft at 5:30PM May 30, 2023Observed: 10.48 ft at 5:45PM May 30, 2023Observed: 10.48 ft at 6:00PM May 30, 2023Observed: 10.45 ft at 6:15PM May 30, 2023Observed: 10.47 ft at 6:30PM May 30, 2023Observed: 10.45 ft at 6:45PM May 30, 2023Observed: 10.47 ft at 7:00PM May 30, 2023Observed: 10.47 ft at 7:15PM May 30, 2023Observed: 10.47 ft at 7:16PM May 30, 2023Observed: 10.49 ft at 7:30PM May 30, 2023Observed: 10.49 ft at 7:31PM May 30, 2023Observed: 10.46 ft at 7:45PM May 30, 2023Observed: 10.46 ft at 7:46PM May 30, 2023Observed: 10.45 ft at 8:00PM May 30, 2023Observed: 10.44 ft at 8:15PM May 30, 2023Observed: 10.44 ft at 8:30PM May 30, 2023Observed: 10.46 ft at 8:45PM May 30, 2023Observed: 10.47 ft at 9:00PM May 30, 2023Observed: 10.43 ft at 9:15PM May 30, 2023Observed: 10.46 ft at 9:30PM May 30, 2023Observed: 10.44 ft at 9:45PM May 30, 2023Observed: 10.47 ft at 10:00PM May 30, 2023Observed: 10.44 ft at 10:15PM May 30, 2023Observed: 10.43 ft at 10:30PM May 30, 2023Observed: 10.43 ft at 10:45PM May 30, 2023Observed: 10.44 ft at 11:00PM May 30, 2023Observed: 10.42 ft at 11:15PM May 30, 2023Observed: 10.41 ft at 11:30PM May 30, 2023Observed: 10.42 ft at 11:45PM May 30, 2023Observed: 10.42 ft at 12:00AM May 31, 2023Observed: 10.43 ft at 12:15AM May 31, 2023Observed: 10.4 ft at 12:30AM May 31, 2023Observed: 10.42 ft at 12:45AM May 31, 2023Observed: 10.41 ft at 1:00AM May 31, 2023Observed: 10.4 ft at 1:15AM May 31, 2023Observed: 10.39 ft at 1:30AM May 31, 2023Observed: 10.41 ft at 1:45AM May 31, 2023Observed: 10.4 ft at 2:00AM May 31, 2023Observed: 10.38 ft at 2:15AM May 31, 2023Observed: 10.39 ft at 2:30AM May 31, 2023Observed: 10.4 ft at 2:45AM May 31, 2023Observed: 10.38 ft at 3:00AM May 31, 2023Observed: 10.39 ft at 3:15AM May 31, 2023Observed: 10.39 ft at 3:16AM May 31, 2023Observed: 10.38 ft at 3:30AM May 31, 2023Observed: 10.38 ft at 3:31AM May 31, 2023Observed: 10.41 ft at 3:45AM May 31, 2023Observed: 10.41 ft at 3:46AM May 31, 2023Observed: 10.4 ft at 4:00AM May 31, 2023Observed: 10.38 ft at 4:15AM May 31, 2023Observed: 10.35 ft at 4:30AM May 31, 2023Observed: 10.38 ft at 4:45AM May 31, 2023Observed: 10.38 ft at 5:00AM May 31, 2023Observed: 10.38 ft at 5:15AM May 31, 2023Observed: 10.37 ft at 5:30AM May 31, 2023Observed: 10.37 ft at 5:45AM May 31, 2023Observed: 10.38 ft at 6:00AM May 31, 2023Observed: 10.38 ft at 6:15AM May 31, 2023Observed: 10.38 ft at 6:30AM May 31, 2023Observed: 10.36 ft at 6:45AM May 31, 2023Observed: 10.36 ft at 7:00AM May 31, 2023Observed: 10.36 ft at 7:15AM May 31, 2023Observed: 10.34 ft at 7:30AM May 31, 2023Observed: 10.38 ft at 7:45AM May 31, 2023Observed: 10.34 ft at 8:00AM May 31, 2023Observed: 10.36 ft at 8:15AM May 31, 2023Observed: 10.37 ft at 8:30AM May 31, 2023Observed: 10.36 ft at 8:45AM May 31, 2023Observed: 10.34 ft at 9:00AM May 31, 2023Observed: 10.38 ft at 9:15AM May 31, 2023Observed: 10.37 ft at 9:30AM May 31, 2023Observed: 10.38 ft at 9:45AM May 31, 2023Observed: 10.36 ft at 10:00AM May 31, 2023Observed: 10.37 ft at 10:15AM May 31, 2023Observed: 10.38 ft at 10:30AM May 31, 2023Observed: 10.36 ft at 10:45AM May 31, 2023Observed: 10.37 ft at 11:00AM May 31, 2023Observed: 10.37 ft at 11:15AM May 31, 2023Observed: 10.37 ft at 11:17AM May 31, 2023Observed: 10.38 ft at 11:30AM May 31, 2023Observed: 10.38 ft at 11:32AM May 31, 2023Observed: 10.38 ft at 11:45AM May 31, 2023Observed: 10.38 ft at 11:47AM May 31, 2023Observed: 10.38 ft at 12:00PM May 31, 2023Observed: 10.37 ft at 12:15PM May 31, 2023Observed: 10.38 ft at 12:30PM May 31, 2023Observed: 10.37 ft at 12:45PM May 31, 2023Observed: 10.38 ft at 1:00PM May 31, 2023Observed: 10.37 ft at 1:15PM May 31, 2023Observed: 10.36 ft at 1:30PM May 31, 2023Observed: 10.37 ft at 1:45PM May 31, 2023Observed: 10.4 ft at 2:00PM May 31, 2023Observed: 10.37 ft at 2:15PM May 31, 2023Observed: 10.4 ft at 2:30PM May 31, 2023Observed: 10.41 ft at 2:45PM May 31, 2023Observed: 10.45 ft at 3:00PM May 31, 2023Observed: 10.4 ft at 3:15PM May 31, 2023Observed: 10.43 ft at 3:30PM May 31, 2023Observed: 10.46 ft at 3:45PM May 31, 2023Observed: 10.48 ft at 4:00PM May 31, 2023Observed: 10.5 ft at 4:15PM May 31, 2023Observed: 10.49 ft at 4:30PM May 31, 2023Observed: 10.49 ft at 4:45PM May 31, 2023Observed: 10.5 ft at 5:00PM May 31, 2023Observed: 10.51 ft at 5:15PM May 31, 2023Observed: 10.53 ft at 5:30PM May 31, 2023Observed: 10.52 ft at 5:45PM May 31, 2023Observed: 10.54 ft at 6:00PM May 31, 2023Observed: 10.53 ft at 6:15PM May 31, 2023Observed: 10.55 ft at 6:30PM May 31, 2023Observed: 10.54 ft at 6:45PM May 31, 2023Observed: 10.54 ft at 7:00PM May 31, 2023Observed: 10.57 ft at 7:15PM May 31, 2023Observed: 10.55 ft at 7:30PM May 31, 2023Observed: 10.55 ft at 7:31PM May 31, 2023Observed: 10.55 ft at 7:45PM May 31, 2023Observed: 10.55 ft at 7:46PM May 31, 2023Observed: 10.54 ft at 8:00PM May 31, 2023Observed: 10.54 ft at 8:01PM May 31, 2023Observed: 10.54 ft at 8:15PM May 31, 2023Observed: 10.5 ft at 8:30PM May 31, 2023Observed: 10.51 ft at 8:45PM May 31, 2023Observed: 10.5 ft at 9:00PM May 31, 2023Observed: 10.49 ft at 9:15PM May 31, 2023Observed: 10.48 ft at 9:30PM May 31, 2023Observed: 10.47 ft at 9:45PM May 31, 2023Observed: 10.46 ft at 10:00PM May 31, 2023Observed: 10.45 ft at 10:15PM May 31, 2023Observed: 10.42 ft at 10:30PM May 31, 2023Observed: 10.42 ft at 10:45PM May 31, 2023Observed: 10.42 ft at 11:00PM May 31, 2023Observed: 10.4 ft at 11:15PM May 31, 2023Observed: 10.38 ft at 11:30PM May 31, 2023Observed: 10.38 ft at 11:45PM May 31, 2023Observed: 10.38 ft at 12:00AM Jun 01, 2023Observed: 10.36 ft at 12:15AM Jun 01, 2023Observed: 10.36 ft at 12:30AM Jun 01, 2023Observed: 10.34 ft at 12:45AM Jun 01, 2023Observed: 10.34 ft at 1:00AM Jun 01, 2023Observed: 10.32 ft at 1:15AM Jun 01, 2023Observed: 10.31 ft at 1:30AM Jun 01, 2023Observed: 10.33 ft at 1:45AM Jun 01, 2023Observed: 10.3 ft at 2:00AM Jun 01, 2023Observed: 10.3 ft at 2:15AM Jun 01, 2023Observed: 10.28 ft at 2:30AM Jun 01, 2023Observed: 10.3 ft at 2:45AM Jun 01, 2023Observed: 10.29 ft at 3:00AM Jun 01, 2023Observed: 10.27 ft at 3:15AM Jun 01, 2023Observed: 10.27 ft at 3:30AM Jun 01, 2023Observed: 10.27 ft at 3:32AM Jun 01, 2023Observed: 10.29 ft at 3:45AM Jun 01, 2023Observed: 10.29 ft at 3:47AM Jun 01, 2023Observed: 10.27 ft at 4:00AM Jun 01, 2023Observed: 10.27 ft at 4:02AM Jun 01, 2023Observed: 10.27 ft at 4:15AM Jun 01, 2023Observed: 10.26 ft at 4:30AM Jun 01, 2023Observed: 10.26 ft at 4:45AM Jun 01, 2023Observed: 10.25 ft at 5:00AM Jun 01, 2023Observed: 10.26 ft at 5:15AM Jun 01, 2023Observed: 10.25 ft at 5:30AM Jun 01, 2023Observed: 10.24 ft at 5:45AM Jun 01, 2023Observed: 10.23 ft at 6:00AM Jun 01, 2023Observed: 10.23 ft at 6:15AM Jun 01, 2023Observed: 10.23 ft at 6:30AM Jun 01, 2023Observed: 10.22 ft at 6:45AM Jun 01, 2023Observed: 10.23 ft at 7:00AM Jun 01, 2023Observed: 10.23 ft at 7:15AM Jun 01, 2023Observed: 10.25 ft at 7:30AM Jun 01, 2023Observed: 10.21 ft at 7:45AM Jun 01, 2023Observed: 10.23 ft at 8:00AM Jun 01, 2023Observed: 10.23 ft at 8:15AM Jun 01, 2023Observed: 10.22 ft at 8:30AM Jun 01, 2023Observed: 10.23 ft at 8:45AM Jun 01, 2023Observed: 10.21 ft at 9:00AM Jun 01, 2023Observed: 10.22 ft at 9:15AM Jun 01, 2023Observed: 10.22 ft at 9:30AM Jun 01, 2023Observed: 10.22 ft at 9:45AM Jun 01, 2023Observed: 10.23 ft at 10:00AM Jun 01, 2023Observed: 10.21 ft at 10:15AM Jun 01, 2023Observed: 10.22 ft at 10:30AM Jun 01, 2023Observed: 10.21 ft at 10:45AM Jun 01, 2023Observed: 10.24 ft at 11:00AM Jun 01, 2023Observed: 10.22 ft at 11:15AM Jun 01, 2023Observed: 10.21 ft at 11:30AM Jun 01, 2023Observed: 10.21 ft at 11:31AM Jun 01, 2023Observed: 10.23 ft at 11:45AM Jun 01, 2023Observed: 10.23 ft at 11:46AM Jun 01, 2023Observed: 10.26 ft at 12:00PM Jun 01, 2023Observed: 10.26 ft at 12:01PM Jun 01, 2023Observed: 10.24 ft at 12:15PM Jun 01, 2023Observed: 10.23 ft at 12:30PM Jun 01, 2023Observed: 10.25 ft at 12:45PM Jun 01, 2023Observed: 10.24 ft at 1:00PM Jun 01, 2023Observed: 10.24 ft at 1:15PM Jun 01, 2023Observed: 10.26 ft at 1:30PM Jun 01, 2023Observed: 10.22 ft at 1:45PM Jun 01, 2023Observed: 10.24 ft at 2:00PM Jun 01, 2023Observed: 10.25 ft at 2:15PM Jun 01, 2023Observed: 10.24 ft at 2:30PM Jun 01, 2023Observed: 10.22 ft at 2:45PM Jun 01, 2023Observed: 10.23 ft at 3:00PM Jun 01, 2023Observed: 10.24 ft at 3:15PM Jun 01, 2023Observed: 10.25 ft at 3:30PM Jun 01, 2023Observed: 10.25 ft at 3:45PM Jun 01, 2023Observed: 10.26 ft at 4:00PM Jun 01, 2023Observed: 10.24 ft at 4:15PM Jun 01, 2023Observed: 10.24 ft at 4:30PM Jun 01, 2023Observed: 10.24 ft at 4:45PM Jun 01, 2023Observed: 10.24 ft at 5:00PM Jun 01, 2023Observed: 10.25 ft at 5:15PM Jun 01, 2023Observed: 10.23 ft at 5:30PM Jun 01, 2023Observed: 10.28 ft at 5:45PM Jun 01, 2023Observed: 10.24 ft at 6:00PM Jun 01, 2023Observed: 10.24 ft at 6:15PM Jun 01, 2023Observed: 10.25 ft at 6:30PM Jun 01, 2023Observed: 10.26 ft at 6:45PM Jun 01, 2023Observed: 10.25 ft at 7:00PM Jun 01, 2023Observed: 10.2 ft at 7:15PM Jun 01, 2023Observed: 10.21 ft at 7:30PM Jun 01, 2023Observed: 10.21 ft at 7:31PM Jun 01, 2023Observed: 10.24 ft at 7:45PM Jun 01, 2023Observed: 10.24 ft at 7:46PM Jun 01, 2023Observed: 10.22 ft at 8:00PM Jun 01, 2023Observed: 10.22 ft at 8:01PM Jun 01, 2023Observed: 10.23 ft at 8:15PM Jun 01, 2023Observed: 10.23 ft at 8:30PM Jun 01, 2023Observed: 10.23 ft at 8:45PM Jun 01, 2023Observed: 10.2 ft at 9:00PM Jun 01, 2023Observed: 10.22 ft at 9:15PM Jun 01, 2023Observed: 10.22 ft at 9:30PM Jun 01, 2023Observed: 10.21 ft at 9:45PM Jun 01, 2023Observed: 10.23 ft at 10:00PM Jun 01, 2023Observed: 10.22 ft at 10:15PM Jun 01, 2023Observed: 10.21 ft at 10:30PM Jun 01, 2023Observed: 10.2 ft at 10:45PM Jun 01, 2023Observed: 10.2 ft at 11:00PM Jun 01, 2023Observed: 10.19 ft at 11:15PM Jun 01, 2023Observed: 10.16 ft at 11:30PM Jun 01, 2023Observed: 10.19 ft at 11:45PM Jun 01, 2023Observed: 10.19 ft at 12:00AM Jun 02, 2023Observed: 10.19 ft at 12:15AM Jun 02, 2023Observed: 10.19 ft at 12:30AM Jun 02, 2023Observed: 10.2 ft at 12:45AM Jun 02, 2023Observed: 10.2 ft at 1:00AM Jun 02, 2023Observed: 10.19 ft at 1:15AM Jun 02, 2023Observed: 10.19 ft at 1:30AM Jun 02, 2023Observed: 10.18 ft at 1:45AM Jun 02, 2023Observed: 10.19 ft at 2:00AM Jun 02, 2023Observed: 10.2 ft at 2:15AM Jun 02, 2023Observed: 10.18 ft at 2:30AM Jun 02, 2023Observed: 10.17 ft at 2:45AM Jun 02, 2023Observed: 10.16 ft at 3:00AM Jun 02, 2023Observed: 10.18 ft at 3:15AM Jun 02, 2023Observed: 10.18 ft at 3:30AM Jun 02, 2023Observed: 10.15 ft at 3:45AM Jun 02, 2023Observed: 10.17 ft at 4:00AM Jun 02, 2023Observed: 10.18 ft at 4:15AM Jun 02, 2023Observed: 10.18 ft at 4:30AM Jun 02, 2023Observed: 10.16 ft at 4:45AM Jun 02, 2023Observed: 10.16 ft at 5:00AM Jun 02, 2023Observed: 10.15 ft at 5:15AM Jun 02, 2023Observed: 10.16 ft at 5:30AM Jun 02, 2023Observed: 10.13 ft at 5:45AM Jun 02, 2023Observed: 10.17 ft at 6:00AM Jun 02, 2023Observed: 10.15 ft at 6:15AM Jun 02, 2023Observed: 10.16 ft at 6:30AM Jun 02, 2023Observed: 10.15 ft at 6:45AM Jun 02, 2023Observed: 10.13 ft at 7:00AM Jun 02, 2023Observed: 10.14 ft at 7:15AM Jun 02, 2023Observed: 10.14 ft at 7:30AM Jun 02, 2023Observed: 10.15 ft at 7:45AM Jun 02, 2023Observed: 10.17 ft at 8:00AM Jun 02, 2023Observed: 10.15 ft at 8:15AM Jun 02, 2023Observed: 10.15 ft at 8:30AM Jun 02, 2023Observed: 10.14 ft at 8:45AM Jun 02, 2023Observed: 10.13 ft at 9:00AM Jun 02, 2023Observed: 10.15 ft at 9:15AM Jun 02, 2023Observed: 10.15 ft at 9:30AM Jun 02, 2023Observed: 10.16 ft at 9:45AM Jun 02, 2023Observed: 10.17 ft at 10:00AM Jun 02, 2023Observed: 10.16 ft at 10:15AM Jun 02, 2023Observed: 10.16 ft at 10:30AM Jun 02, 2023Observed: 10.14 ft at 10:45AM Jun 02, 2023Observed: 10.15 ft at 11:00AM Jun 02, 2023Observed: 10.18 ft at 11:15AM Jun 02, 2023Observed: 10.17 ft at 11:30AM Jun 02, 2023Observed: 10.17 ft at 11:31AM Jun 02, 2023Observed: 10.18 ft at 11:45AM Jun 02, 2023Observed: 10.18 ft at 11:46AM Jun 02, 2023Observed: 10.15 ft at 12:00PM Jun 02, 2023Observed: 10.15 ft at 12:01PM Jun 02, 2023Observed: 10.16 ft at 12:15PM Jun 02, 2023Observed: 10.17 ft at 12:30PM Jun 02, 2023Observed: 10.16 ft at 12:45PM Jun 02, 2023Observed: 10.16 ft at 1:00PM Jun 02, 2023Observed: 10.14 ft at 1:15PM Jun 02, 2023Observed: 10.17 ft at 1:30PM Jun 02, 2023Observed: 10.16 ft at 1:45PM Jun 02, 2023Observed: 10.19 ft at 2:00PM Jun 02, 2023Observed: 10.16 ft at 2:15PM Jun 02, 2023Observed: 10.16 ft at 2:30PM Jun 02, 2023Observed: 10.16 ft at 2:45PM Jun 02, 2023Observed: 10.16 ft at 3:00PM Jun 02, 2023Observed: 10.18 ft at 3:15PM Jun 02, 2023Observed: 10.17 ft at 3:30PM Jun 02, 2023Observed: 10.18 ft at 3:45PM Jun 02, 2023Observed: 10.16 ft at 4:00PM Jun 02, 2023Observed: 10.17 ft at 4:15PM Jun 02, 2023Observed: 10.17 ft at 4:30PM Jun 02, 2023Observed: 10.17 ft at 4:45PM Jun 02, 2023Observed: 10.14 ft at 5:00PM Jun 02, 2023Observed: 10.16 ft at 5:15PM Jun 02, 2023Observed: 10.16 ft at 5:30PM Jun 02, 2023Observed: 10.16 ft at 5:45PM Jun 02, 2023Observed: 10.17 ft at 6:00PM Jun 02, 2023Observed: 10.15 ft at 6:15PM Jun 02, 2023Observed: 10.17 ft at 6:30PM Jun 02, 2023Observed: 10.16 ft at 6:45PM Jun 02, 2023Observed: 10.16 ft at 7:00PM Jun 02, 2023Observed: 10.17 ft at 7:15PM Jun 02, 2023Observed: 10.17 ft at 7:30PM Jun 02, 2023Observed: 10.17 ft at 7:31PM Jun 02, 2023Observed: 10.19 ft at 7:45PM Jun 02, 2023Observed: 10.19 ft at 7:46PM Jun 02, 2023Observed: 10.16 ft at 8:00PM Jun 02, 2023Observed: 10.16 ft at 8:01PM Jun 02, 2023Observed: 10.17 ft at 8:15PM Jun 02, 2023Observed: 10.17 ft at 8:30PM Jun 02, 2023Observed: 10.16 ft at 8:45PM Jun 02, 2023Observed: 10.17 ft at 9:00PM Jun 02, 2023Observed: 10.15 ft at 9:15PM Jun 02, 2023Observed: 10.17 ft at 9:30PM Jun 02, 2023Observed: 10.18 ft at 9:45PM Jun 02, 2023Observed: 10.18 ft at 10:00PM Jun 02, 2023Observed: 10.19 ft at 10:15PM Jun 02, 2023Observed: 10.17 ft at 10:30PM Jun 02, 2023Observed: 10.19 ft at 10:45PM Jun 02, 2023Observed: 10.17 ft at 11:00PM Jun 02, 2023Observed: 10.17 ft at 11:15PM Jun 02, 2023Observed: 10.17 ft at 11:30PM Jun 02, 2023Observed: 10.16 ft at 11:45PM Jun 02, 2023Observed: 10.19 ft at 12:00AM Jun 03, 2023Observed: 10.18 ft at 12:15AM Jun 03, 2023Observed: 10.18 ft at 12:30AM Jun 03, 2023Observed: 10.18 ft at 12:45AM Jun 03, 2023Observed: 10.17 ft at 1:00AM Jun 03, 2023Observed: 10.18 ft at 1:15AM Jun 03, 2023Observed: 10.16 ft at 1:30AM Jun 03, 2023Observed: 10.2 ft at 1:45AM Jun 03, 2023Observed: 10.16 ft at 2:00AM Jun 03, 2023Observed: 10.17 ft at 2:15AM Jun 03, 2023Observed: 10.2 ft at 2:30AM Jun 03, 2023Observed: 10.2 ft at 2:45AM Jun 03, 2023Observed: 10.19 ft at 3:00AM Jun 03, 2023Observed: 10.19 ft at 3:15AM Jun 03, 2023Observed: 10.19 ft at 3:30AM Jun 03, 2023Observed: 10.19 ft at 3:31AM Jun 03, 2023Observed: 10.21 ft at 3:45AM Jun 03, 2023Observed: 10.21 ft at 3:46AM Jun 03, 2023Observed: 10.2 ft at 4:00AM Jun 03, 2023Observed: 10.2 ft at 4:01AM Jun 03, 2023Observed: 10.18 ft at 4:15AM Jun 03, 2023Observed: 10.21 ft at 4:30AM Jun 03, 2023Observed: 10.19 ft at 4:45AM Jun 03, 2023Observed: 10.19 ft at 5:00AM Jun 03, 2023Observed: 10.2 ft at 5:15AM Jun 03, 2023Observed: 10.21 ft at 5:30AM Jun 03, 2023Observed: 10.2 ft at 5:45AM Jun 03, 2023Observed: 10.19 ft at 6:00AM Jun 03, 2023Observed: 10.22 ft at 6:15AM Jun 03, 2023Observed: 10.21 ft at 6:30AM Jun 03, 2023Observed: 10.21 ft at 6:45AM Jun 03, 2023Observed: 10.2 ft at 7:00AM Jun 03, 2023Observed: 10.18 ft at 7:15AM Jun 03, 2023Observed: 10.22 ft at 7:30AM Jun 03, 2023USGS--Water Resources of the United StatesSXCI4(plotting HGIRG) Graph Created (8:19AM Jun 3, 2023)ObservedLatest observed value: 10.22 ft at 7:30 AM CDT 3-Jun-2023. Flood Stage is 32 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Big Sioux River at Sioux City are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - near Jefferson Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 41
Moderate Flood Stage: 38
Flood Stage: 32
Action Stage: 29
Low Stage (in feet): -9999

Historic Crests
(1) 37.70 ft on 06/20/2014
(2) 37.46 ft on 03/17/2019
(3) 31.57 ft on 06/25/2018
(4) 21.89 ft on 04/02/2020
(5) 19.04 ft on 05/04/2016
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.94 ft on 06/02/2022
(2) 12.37 ft on 09/01/2021
(3) 21.89 ft on 04/02/2020
(4) 37.46 ft on 03/17/2019
(5) 31.57 ft on 06/25/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:14
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Gauge LocationGauge Map Marker
 Disclaimer
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
43.5 the lower levees in the Iowa Riverside community are in danger of being overtopped if not sandbagged.
41 sandbagging is needed to protect Interstate 29 from flooding.
38 most of the storm drains are submerged.
32 agricultural land north of the leveed area begins to flood.
Photos
(1) Upstream View
(2) Downstream View
About This Location Collapse

Latitude: 42.524444° N, Longitude: 96.480000° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 32 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 1060.00 1092.00 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available 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
Flood stage and impact levels have recently changed due to a change in the zero datum for this gauge. How low could the river get?
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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
Sioux Falls Weather Forecast Office
26 Weather Lane
Sioux Falls, SD 57104-0198
(605) 330-4247
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