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The graphics below will provide up-to-date river levels and forecasts for the main stem of the Mississippi River. For a large scale view of the hydrology situation over the Upper Mississippi River Valley region, check out the Hydrology Monitor.
A color-coded map indicates current river levels or flood stages for more than 6,500 streamgages in U.S. states and territories. Zoom to a region of interest and hover over any dot to generate a hydrograph of recently observed water levels at that site.
- Precipitation Forecasting
- Precipitation Analysis
- River Flow Modeling
- Soil Water Modeling
- Mainstem River Forecasting
Forecasting rivers begins with the rainfall and snowfall forecast. RFC hydrometeorologists and hydrologists prepare precipitation forecasts for multiple days at a time to monitor developing weather systems.
Multiple organizations and offices maintain gage stations – sites on a river, stream, canal, or other body of water where observations of water level (stage) and flow are measured. RFC staff hydrometeorologists and hydrologists look at Doppler radar plus rainfall and snowfall measured from the local, state, and federal gage networks to estimate act...
To be able to forecast the amount of water flowing through a certain point along a river, the forecaster breaks the flow down into three components: 1. Baseflow: the amount of water coming from groundwater. 2. Runoff: the amount of water flowing over the surface of the land. 3. Routed Flow: the amount of water coming from an upstream point in the r...
Several River Forecast Centers use the Sacramento Soil Moisture Accounting (SAC-SMA) rainfall-runoff model. The SAC-SMA is a model that calculates total amount of runoff based on the different types of soils in the area, called soil zones, which absorb water differently. Many different pieces of information are used to show the movement of water in...
Modeling river flow involves many pieces that must work together to create an accurate forecast. One factor, soil moisture, is modeled to estimate how much of the rainfall will actually become runoff rather than remain in the soil. A second factor is lag, the time it takes for the runoff to reach gage A, the first gage in a network. A third factor ...
Click on a state to learn more about the types of flooding experienced there and how residents can protect their lives and property. You will also find information on the top 5 floods for each state, learn which National Weather Service offices forecast for the area and more!
Flood Safety Tips and Resources. Flooding is a coast-to-coast threat to some part of the United States and its territories nearly every day of the year. This site is designed to teach you how to stay safe in a flood event.
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View sea level rise and potential coastal flooding impact areas and relative depth. Compare inundation levels to local relative sea level rise scenarios. View the level of confidence in the base data used for mapping inundation levels.
