National Weather Service United States Department of Commerce

Heavy Snow and Strong Winds Across the North-Central U.S.; Heavy Rain and Flash Flooding in American Samoa and Puerto Rico

Areas of moderate to heavy snow and gusty to high winds are expected across the Northern Plains, Upper Midwest and Great Lakes into Friday. Several inches of snow accumulation is expected. Heavy rain will bring an isolated flash flood threat to Puerto Rico and flash flooding along with mudslides to American Samoa today. Read More >

Use the new Winter Storm Severity Index (WSSI) to find potential winter impacts for your community. Expected winter storms are given an 'impact ranking' in 6 categories, ranging from 'No Impacts' to 'Extreme Impacts'. This product combines forecasts such as snow amount, snow load, and blowing snow to come up with an all-encompassing forecast.