A winter storm warning is issued by meteorological agencies when severe winter weather is expected. This can include heavy snowfall, ice accumulation, or a combination of both, which can create hazardous conditions. The warning alerts the public to prepare for potential disruptions, such as difficult travel and power outages. When a winter storm warning is in effect, it is important to stay informed through reliable sources like the National Weather Service. People are advised to take precautions, such as stocking up on supplies and avoiding unnecessary travel, to ensure their safety during the storm.