Summary: A significant winter storm will bring heavy snow and strong winds to the Cascades through Monday, then the northern Intermountain West through northern Plains Monday night into Thursday. Severe weather will impact areas of the southern Plains and the lower to middle Mississippi Valley through midweek. Impacted: I-25, I-29, I-70, I-90, I-94
Major lanes of concern
- Interstate 25 from Buffalo to Casper, Wyoming
- Interstate 29 in North Dakota from the Canada border to Fargo
- Interstate 70 in Colorado west of Denver
- Interstate 90 from Gillette, Wyoming, to Missoula, Montana
- Interstate 94 from Billings to Fargo
Washington
Winter Weather Advisory / Winter Storm Warning
- Winter Weather Advisory remains in effect until 5 PM PDT this afternoon
- Wet snow expected. Snow accumulations of 1 to 3 inches possible
- 7 to 14 inches expected above 2500 feet
- Heavy snow with rates 1-2" per hour will be possible
- Winds gusting as high as 40 mph
- Impacts: Plan on slippery roads conditions across US 2. Winter travel conditions will be possible across US 97 Blewett Pass
- Wet snow expected. Snow accumulations of 1 to 3 inches possible
- Winter Storm Warning remains in effect until 5 PM PDT this afternoon
- Heavy snow expected. Total snow accumulations of 4 to 14 inches
- Winds gusting as high as 45 mph
- Impacts: Travel could be very difficult to impossible
Oregon
High Wind Warning / Winter Storm Warning
- High Wind Warning in effect until 11 PM PDT this evening
- Southwest to west winds 35 to 45 mph with gusts up to 65 mph expected
- Higher gusts to 75 mph are possible at area headlands and capes
- Impacts: Damaging winds could blow down trees and power lines. Periods of snow and blowing snow could significantly lower visibilities. Travel will be difficult, especially for high profile vehicles
- Southwest to west winds 35 to 45 mph with gusts up to 65 mph expected
- Winter Storm Warning remains in effect until 11 PM PDT this evening
- Heavy, wet snow snow accumulations of 13 to 24 inches
- Winds gusting as high as 65 mph over exposed terrain
- Impacts: Travel could be very difficult to impossible. Snowfall rates may approach an inch an hour at times, and reduced visibilities are expected in exposed areas with the gusty winds
California
Winter Storm Warning / High Wind Warning
- Winter Storm Warning remains in effect until 11 PM PDT this evening above 2500 feet
- Heavy, wet snow accumulations expected above 2500 feet of 5 to 12 inches
- Higher elevations could observe up to 20 inches of snow accumulation
- Winds gusting as high as 45 mph over exposed terrain
- Impacts: Travel could be very difficult to impossible. Blowing snow could significantly reduce visibility. This includes portions of Highway 96
- Heavy, wet snow accumulations expected above 2500 feet of 5 to 12 inches
- High Wind Warning remains in effect from 11 AM this morning to 10 AM PDT Tuesday
- West winds 35 to 45 mph with gusts 60 to 80 mph expected
- Impacts: High winds can topple trees and down power lines. Travel will be difficult and dangerous along sections of Highway 395 in the Owens Valley, especially for high profile vehicles
Nevada
High Wind Warning / Winter Weather Advisory
- High Wind Warning remains in effect from 11 AM this morning to 3 AM PDT Tuesday
- West winds 30 to 45 mph with gusts up to 70 mph expected
- Impacts: Gusty winds will blow around unsecured objects. Winds this strong can make driving difficult, especially for high profile vehicles. Periods of blowing snow and or blowing dust are likely during this event, which may result in reduced
visibilities at times
- Winter Weather Advisory remains in effect from 8 AM to 8 PM PDT this evening
- Snow expected. Total snow accumulations of 2 to 8 inches
- 8 to 14 inches above 7000 feet
- Gusts to 50 mph in the lower elevations
- Sierra ridge winds gusting near 100 mph
- Impacts: Winds this strong can make driving difficult, especially for high profile vehicles. Areas of blowing snow could significantly reduce visibility
- Snow expected. Total snow accumulations of 2 to 8 inches
Idaho
Winter Storm Warning
- Winter Storm Warning remains in effect from 9 AM to 11 AM PDT Tuesday
- Heavy snow at times expected. Total snow accumulations between 5 and 12 inches
- Wind gusts in excess of 30 mph during frontal passage in afternoon
- Impacts: Travel could be very difficult. Patchy blowing snow could significantly reduce visibility, with near whiteout conditions with frontal passage
Montana
Winter Storm Warning / High Wind Warning
- Winter Storm Warning remains in effect from 4 PM MDT this afternoon into Wednesday
- Heavy snow expected. Total snow accumulations between 5 and 15 inches across most lower elevations
- 10 to 20 inches in the mountains
- Northeast 30 to 40 mph with gusts to 60 mph
- Impacts: Travel could be very difficult. Widespread blowing snow could significantly reduce visibility
- Heavy snow expected. Total snow accumulations between 5 and 15 inches across most lower elevations
- High Wind Warning remains in effect from 4 PM this afternoon to 9 AM MDT Tuesday
- Northeast winds 35 to 45 mph with gusts up to 70 mph expected
- Impacts: High winds can topple trees and down power lines.Travel will be difficult, especially for high profile vehicles
Wyoming
Winter Storm Warning
- Winter Storm Warning remains in effect from 6 PM this evening to 6 PM MDT Tuesday
- Periods of snow, heavy at times. Total snow accumulations of 8 to 16 inches
- Winds gusting as high as 50 mph
- Impacts: Travel could be very difficult including along Interstates 25 and 90. Road closures are possible. Near whiteout conditions in heavy snow combined with blowing snow
Utah
Winter Storm Warning / High Wind Warning
- Winter Storm Warning remains in effect from noon MDT today into Wednesday
- Heavy snow expected. Total snow accumulations of 1 to 2 feet
- Locally higher amounts especially in the upper Cottonwoods
- Winds gusting as high as 45 mph over exposed terrain
- Impacts: Winter driving conditions are expected on all area routes. Traction restrictions may be enacted. This includes portions of I-80
- Heavy snow expected. Total snow accumulations of 1 to 2 feet
- High Wind Warning remains in effect from 3 PM this afternoon to 6 AM MDT Tuesday
- Southwest winds 30 to 40 mph with gusts up to 65 mph expected
- Impacts: High winds may move loose debris. Travel will be difficult due to strong crosswinds, especially for high profile vehicles and vehicles with trailers. Areas of blowing dust may cause reduced visibility
Colorado
Winter Storm Warning / High Wind Warning
- Winter Storm Warning in effect from 6 PM MDT this evening into Wednesday
- Heavy snow expected. Total snow accumulations of 8 to 16 inches
- Winds gusting as high as 70 mph
- Impacts: Travel could be very difficult due to near blizzard conditions in blowing and drifting snow, especially on ridge tops and mountain passes. Icy and snow-packed roads are likely
- High Wind Warning in effect from 9 PM this evening to 8 PM MDT Tuesday
- Southwest winds 45 to 65 mph with gusts up to 90 mph expected
- Impacts: Damaging winds will blow down trees and power lines. Widespread power outages are possible. Travel will be difficult, especially for high profile vehicles
Arizona
Winter Storm Warning / High Wind Warning / Blowing Dust Advisory
- Winter Storm Warning remains in effect until 11 PM PDT this evening above 2500 feet
- Heavy, wet snow accumulations expected above 2500 feet of 5 to 12 inches
- Higher elevations could observe up to 20 inches of snow accumulation
- Winds gusting as high as 45 mph over exposed terrain
- Impacts: Travel could be very difficult to impossible. Blowing snow could significantly reduce visibility. This includes portions of Highway 96
- Heavy, wet snow accumulations expected above 2500 feet of 5 to 12 inches
- High Wind Warning remains in effect from 11 AM PDT this morning into Tuesday
- Southwest winds 35 to 45 mph with gusts 50 to 75 mph expected
- Impacts: High winds can topple trees and down power lines. Travel will be difficult, especially for high profile vehicles
- Blowing Dust Advisory remains in effect from 11 AM this morning to 7 PM MDT this evening
- Visibility between one quarter mile and one mile in blowing dust expected
- Impacts: Blowing dust will produce low visibilities especially along Interstate 10
New Mexico
High Wind Warning
- High Wind Warning in effect from 2 PM this afternoon to 3 PM MST Tuesday
- Southwest winds 35 to 45 mph with gusts up to 65 mph expected
- Impacts: Damaging winds will blow down trees and power lines. Travel will be difficult, especially for high profile vehicles
Louisiana