The 2018 Winter Olympics will start on February 9 in PyeongChang, South Korea. PyeongChang is in the mountainous northeastern part of the country and has a similar latitude as Richmond, Virginia. It's not unusual for the Siberian High pressure to bring several days of persistently cold and dry weather, with high temperatures below freezing. Other patterns to look for include warm and moist flow coming from the Yellow Sea, leading to a chance for snow and rain. Easterly wind flow from the Sea of Japan is typically cooler and thus more likely to generate snow chances.