German forecasters on Saturday said the country should brace itself for snowstorms and plummeting temperatures. DWD, the German Weather Service, issued an extreme weather warning, saying emergency crews had been put on standby. The DWD also warned against unnecessary trips by car. The meteorologists warned of heavy snowfall and snowdrifts in different parts of the country. They expected between 15 and 40 centimeters of snow, with drifts rising to a meter on Sunday evening. Some rail services in central and northern Germany have been axed. …