The 2021 National Hydrologic Assessment offers an analysis of flood risk, water supply, and ice break-up and jam flooding for spring 2021 based on late summer, fall, and winter precipitation, frost depth, soil saturation levels, snowpack, current streamflow, and projected spring weather.  NOAA's network of 122 Weather Forecast Offices, 13 River Forecast Centers, National Water Center, and other national centers nationwide assess this risk, summarized here at the national scale. Overall, a reduced risk of spring flooding exists this year primarily due to dry fall and winter, along with limited snow still remaining on the ground.  Major flooding is not expected this spring season.  Minor to moderate flooding is ongoing across portions of the Lower Missouri River Basin with the flood risk predicted to continue through spring.  The exception to the reduced risk is over the Coastal Plain of the Carolinas and Lower Ohio River Basin where flooding is predicted this spring, driven by above normal precipitation over the winter months, which has led to ongoing elevated streamflows and flooding and highly saturated soil conditions.  This wet pattern is expected to continue across the Coastal Plain of the Carolinas and Lower Ohio River Basin through spring.  It is important to note that heavy rainfall at any time can lead to flooding, even in areas where overall risk is considered low.  This assessment addresses only spring flood potential on the timescale of weeks to months, not days or hours.  Debris flow and flash flooding often associated with burn scars and urban areas can form quickly and occur any time with heavy rainfall events.  Nearly every day, flooding happens somewhere in the United States or its territories.  Flooding can cause more damage than any other weather-related event...with an annual average direct damage impact of 8 billion dollars a year over the past 40 years, with these impact costs adjusted for inflation. Flooding is one of America's most underrated killers, causing nearly 100 fatalities per year… roughly half of which occur in vehicles. Flowing water can be particularly powerful and dangerous… with just six inches of water able to sweep a person off their feet… and two feet of rushing water able to carry a mid-size car downstream.  No vehicle should ever attempt to cross a flooded roadway, and drivers are reminded to “Turn Around, Don’t Drown.” To be prepared, every American should know their flood risk and what to do before, during, and after a flood event.  This information is available at www.ready.gov/floods.  To remain apprised of your current flood risk, visit weather.gov for the latest official watches and warnings.  For detailed hydrologic conditions and forecasts, go to water.weather.gov.