National Weather Service United States Department of Commerce

Heavy Snow And Hazardous Travel Conditions Expected Over The Rockies, Locally Heavy Rainfall Over The South

Heavy snow and hazardous travel conditions will persist over portions of the central and southern Rockies into Friday before diminishing. A cold front will track eastward bringing the potential for locally heavy rainfall from the south central U.S. to the Appalachians into Saturday. Localized flooding will be possible. Read More >

Overview

On Wednesday, October 9th, 2019, a large upper level low began intensifying across Montana, Wyoming, and Colorado as a strong surface cold front moved across the Dakotas. Precipitation started as rain for most areas and as cold air rushed in behind the front, it did not take long for the rain to change over to all snow. By Thursday morning, a very large Colorado Low developed downwind of the Rockies and began moving into the Northern Plains. The low stalled over far northwest Minnesota Thursday night in response to a downstream ridge over the northeast United States. This ridge blocked the upper level flow and prevented the low from moving out of the region. This kept the low stalled over the same area through Saturday night, which resulted in a very long duration of high winds and accumulating snow across central and eastern North Dakota. Blizzard conditions developed across portions of central and most of eastern North Dakota Friday and Saturday as winds increased, gusting as high as 64 mph.

This record-breaking October blizzard certainly left its mark by the time the storm finally began moving out of the area on Sunday. Total snow accumulations as high as 30 inches were observed near Harvey with drifts over 10 feet tall. Widespread snow amounts between one and two feet were observed across nearly all of central and eastern North Dakota. Travel became impossible across much of the area as the interstate and other local highways shut down. Some tree damage was observed across portions of eastern North Dakota, because trees had yet to drop all of their leaves and could not bear the weight of the heavy wet snow. The timing of this blizzard could not have been worse for the agricultural community, which needed a prolonged period of warm and dry weather for a harvest that was already delayed due to a record wet September.

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