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Heavy Rainfall and Flash Flooding Over the Southeast; Lingering Fire Weather Concerns in the West

Heavy rainfall, flooding, gusty winds, and the risk of a few tornadoes will continue over portions of the Southeast U.S. as Sally gradually weakens. Elsewhere, critical fire weather conditions linger over parts of Oregon, northern California, and the Great Basin, along with poor air quality for much of the West. Cool weather prevails from the Upper Midwest into New England. Read More >

Overview

A strong winter storm created numerous impacts across eastern South Dakota and west central Minnesota on December 28-29, 2019.  The heaviest precipitation came in two waves, with the first arriving on during the late evening of December 27th and continuing into December 28th.  Behind the first wave of precipitation, there was a period of light snow, drizzle, and freezing drizzle on Saturday for areas of east central South Dakota and west central Minnesota.  The second wave of precipitation arrived on the evening of December 28th and continued into December 29th.  This second wave of precipitation fell as snow, and when combined with the first wave of snowfall, led to many locations experiencing over 10 inches of snow.

In addition to the snow, strong winds developed on December 29th as an intensifying area of low pressure moved into the southern half of Minnesota. This led to wind gusts up to 62 mph in central South Dakota and blizzard conditions between the Missouri River and the western edge of the Prairie Coteau. The combination of the snow and blowing snow severely impacted road conditions and travel across the region, with "No Travel Advised" designated for many state and county roads and even the closure of I-90 and I-29 in parts of South Dakota. 

Storm Total Snowfall Amounts from late on December 27th through the morning of December 31st, 2019. Amounts based off observations and local storm reports through 10 AM 12/31/2019. 
Storm total snowfall amounts from late on December 27th through the morning of December 31st, 2019. Amounts based off observations and local storm reports through 10 AM 12/31/2019. 
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