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 >

Overview

A unique and rare weather pattern characterized by persistent low pressure over the Desert Southwest lead to multiple days of widespread heavy rain for the combined Texas and Oklahoma Panhandles. The heavy rain was mainly due to the fact that the atmosphere was relatively warm and very moist, with total atmospheric moisture above the 90th percentile to near daily max values with subtropical moisture being pumped into the area. There was also some severe weather, but hail sizes rarely were above the size of quarters and damaging wind reports were not common. The flooding reports were numerous, however. Many of the area rivers and creeks were approaching record levels, and many locations were impacts by flash flooding as well.

 

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