Precipitation data from SMHI weather station close to the Westlink construction site. # About SMHI SMHI, the Swedish Meteorological and Hydrological Institute, is an expert agency under the Ministry of the Environment. Through unique expertise in meteorology, hydrology, oceanography and climatology, SMHI contributes towards greater public welfare, increased safety and a sustainable society. SMHI's observation stations collect large quantities of data, including temperature, precipitation, wind, air pressure, lightning, solar radiation and ozone. Satellites and radar installations are also important sources. Data is presented continuously on [smhi.se](https://www.smhi.se/) and used in SMHI's various weather services.