National weather services are government agencies responsible for monitoring and forecasting weather conditions. They collect data from various sources, including satellites, radar, and weather stations, to provide accurate and timely information about current and upcoming weather events. This information helps communities prepare for severe weather, such as storms, floods, and heatwaves. These agencies also issue warnings and advisories to keep the public informed and safe. In many countries, national weather services collaborate with international organizations to share data and improve global weather forecasting. Examples include the National Oceanic and Atmospheric Administration (NOAA) in the United States and the Met Office in the United Kingdom.