The Minnesota Runoff Risk Advisory Forecast (RRAF) system is a tool developed by the Minnesota Department of Agriculture and the National Weather Service. It is designed to help farmers and commercial applicators determine the best time to apply manure to reduce the probability of off target movement of valuable nutrients and protect water resources.
The RRAF takes into account estimated soil moisture content, forecast precipitation and temperatures, snow accumulation and melt to predict the likelihood of current day, next day, and 72 hour runoff events. Farmers and commercial applicators use an interactive map to locate their field and find the forecasted risk. Users can also sign up for email or text messages for their county that alert them to a severe runoff risk for that day. The home page for the project is at www.mda.state.mn.us/rraf