National Weather Service United States Department of Commerce

Moderating Temperatures for the East; Developing Storm for the Plains

Temperatures will continue to moderate across the east half of the nation through at least the first half of this week. A developing storm across the Southern Plains may bring some heavy rain from the Plains to the lower Great Lakes region, a wintry mixture and accumulating snow across the Midwest and Upper Mississippi Valley into mid-week. The west remains unsettled with occasional rain and snow. Read More >


A powerful low pressure system affected much of the southwestern United States from February 20th through the 23rd. This storm was characterized by cold temperatures and very high snowfall totals across the Four Corners region. Over three feet of snow fell in the San Juan Mountains, with well over a foot along portions of the US 160 corridor. 

This storm was the largest in a series of heavy snow events across the central and southern Rockies throughout the month of February. Mountain snowpack values averaged well above seasonal averages, and were close to 150% of normal by the time the storm ended.

Many highways in southeast Utah and southwest Colorado were closed for a period of time on February 22nd when snow rates were at their highest. Mountain passes in the San Juans were closed due to avalanche concerns. Avalanche warnings were issued in the La Sal, Abajo and San Juan mountains. 

A large area of low pressure dives southward through the western United States on February 22nd. This system was accompanied by very cold air stretching all the way south of the USA/Mexico Border and into the eastern Pacific Ocean. 
Image Image Image
Snowfall at Purgatory Ski Resort on 2/22.
Photo credit: Purgatory Ski Resort
Snowfall at Powderhorn Ski Resort.
Photo credit: Powderhorn Ski Resort
Snowfall in the San Juan Mountains.
Photo credit: Purgatory Ski Resort


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