The National Water Model (NWM) forecasts streamflow for the contiguous United States. The system models processes such as snowmelt and infiltration to determine how much precipitation forecast by NWS will become runoff, and then simulates discharge levels.
Check the probability that cumulative rainfall will exceed user-defined thresholds within the next three days over 6- to 24-hour intervals. This forecast can serve as an early alert for potential flooding related to heavy precipitation.
Monday through Friday, NOAA's Weather Prediction Center produces maps of hazards forecast for the next 3-7 days.
View monthly maps showing the probability for precipitation ranking in the top, middle, or bottom third of historical observations. Outlooks that favor drier or wetter periods can raise awareness of the potential for changing conditions.
The National Hurricane Center monitors marine weather and indicates the chance that disturbances will develop into tropical storms. For storms that do develop, the site shows predicted paths and storm status. Monitor this site to be aware of the potential for tropical storms and/or hurricanes.
This interactive map shows regions where the risk of having a seasonal extreme in temperature or precipitation is elevated during El Niño or La Niña conditions. Decision makers can identify areas that have an increased or decreased risk of extreme warm/cold (or dry/wet) seasons, and plan accordingly.
Explore graphs and maps of historical and projected temperature and precipitation variables for any county in the contiguous United States. Additionally, view graphs from individual weather stations and coastal tidal gauges.
Visualize community-level impacts from coastal flooding or sea level rise, including simulations of how future flooding might impact local landmarks. Access data related to water depth, flood frequency, and mapping confidence.