Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >

Overview

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.


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

Photos & Video
Radar

Photos & Video


Snow in Pagosa Springs on February 22nd. Photo courtesy of Michele Ó Raifeartaigh	Snow in Pagosa Springs on February 22nd. Photo courtesy of Jay Godson	Snow in the Durango West Subdivision. Photo from Jerry McBride/Durango Herald	Snow on top of the Kennebec Cafe in Hesperus. Photo from Jerry McBride/Durango Herald

Radar and Satellite Imagery


KGJX radar data throughout the heaviest portion of snowfall on February 22nd. Data visualization courtesy of College of DuPage.	GOES West Infrared data showing the evolution of the low pressure and moisture stream over the southwest USA. Data visualization courtesy of CIRA.	GOES West Water Vapor imagery showing the deep low pressure system moving across the southwest. Data visualization courtesy of CIRA.	Satellite derived snowfall data before and after the event. Data visualization courtesy of NOHRSC.

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Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

February 20-23 Winter Storm