RIGA, Dec 3 Latvian Center for Environment, Geology and Meteorology (LCOSM) for the first time in history has declared a red level of weather danger in Riga due to snowfall, Sputnik Latvia reports on Friday. for the capital — for the first time in history, a red warning about extreme snowfall has been announced, «the agency said. The thickness of the snow cover in the center of Riga and at the Daugavgriva observation station was 21 centimeters.