Väderinformation

Väderinformation refers to information about atmospheric conditions and forecasts for a given location or region. It is produced by meteorological organizations by integrating observations from weather stations, radar, satellites and ships with numerical weather prediction models to generate current data, short-term forecasts and warnings.

Key components include current conditions such as temperature, precipitation, wind, humidity, air pressure and visibility, as well as forecast products. Short-term forecasts cover the next 6–48 hours, while medium-range forecasts extend to several days and long-range forecasts look further ahead. Nowcasting focuses on very short-term changes, often using radar data to track precipitation movement. Warnings and advisories alert the public and specific sectors to potential severe weather, such as storms, heavy rainfall, extreme heat or cold, and strong winds.

Väderinformation is disseminated through multiple channels, including national meteorological services, weather websites, mobile apps, television and radio broadcasts, and API feeds used by developers and businesses. In Sweden, for example, the national meteorological service provides public weather data and warnings that are widely accessed by residents and organizations. The data is used by individuals for daily planning, and by sectors such as aviation, shipping, agriculture, construction and emergency management to reduce risk and improve safety.

Forecasts are inherently probabilistic, and accuracy declines with time and regional complexity. Users should consider uncertainties and consult multiple sources or warnings when making important decisions.