Blizzards, floods, severe winds, ice storms, avalanches, and frost damage to crops are just some of the harsh weather conditions that the jet stream can bring in during the winter. On a smaller scale, but just as important, are personal injury accidents because of ice that might be on the sidewalk. Not so obvious is lack of snow caused by a big ridge of high pressure that forms in the Western US and brings dry and mild conditions. Since many cities get their summer water from the snowmelt in the mountains there can be drought conditions.
Lawsuits and big insurance claims can quickly follow winter weather conditions. Weather data analysis of the jet stream’s location, and reviewing weather data that is archived with major governments on a worldwide basis is critical.