Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Sunday & Monday
Moisture continues to stream into the region in NW flow aloft, riding up and over a stationary upper level ridge parked offshore. Moderate to heavy precipitation (mostly rain) will continue along the west slopes of the Cascades today, with far less precipitation for Mt. Hood. Downsloping east of the Cascades crest will quickly taper precipitation totals for the east slopes of the Cascades. The north Cascades on both sides of the crest are again the relatively local cool spot with snow levels not forecast to rise much higher than 6000 feet today.
Moderate to strong westerly winds will be seen in most locations and elevations in this pattern. A weak frontal boundary will pass through later this afternoon, changing steady precipitation to showers with intensities lowering and ushering in somewhat cooler air. Snow levels will gradually fall overnight and settle between 3500-4500 feet on Monday. Showers should continue in W-NW flow, again mainly for the west slopes of the Cascades, with new snowfall accumulations expected above 4000 feet for Snoqualmie Pass to Mt. Baker.
NW flow will keep plenty of moisture and clouds banked up along the west slopes of the Cascades Monday and Monday night. The ridge will amplify offshore on Monday and begin to slide back towards the PNW Monday night, helping to bring shower activity to an end.
Weather Forecast
Olympics
| Sunday | Light to occasionally moderate rain becoming light showers in the afternoon. Mild. |
| Sunday Night | Mostly cloudy with scattered light rain and snow showers. Cooling trend. |
| Monday | Cloudy with light rain and snow showers. Cooler. |
| Monday Night | Mostly cloudy with scattered light rain and snow showers ending overnight. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Sunday | Rain, heavy at times becoming slightly lighter in the afternoon. Less precipitation for the Crystal area. Mild. Slightly cooler with moderate to heavy rain and snow Mt. Baker area. Moderate to strong winds. |
| Sunday Night | Light to moderate rain and snow showers. Cooling trend. Windy. |
| Monday | Light to occasionally moderate rain and snow showers central and north Cascades. Cloudy with scattered light rain and snow showers south Cascades. Cooler. |
| Monday Night | Mostly cloudy with scattered light rain and snow showers ending overnight. |
East Slopes of the Washington Cascades
| Sunday | Light to moderate rain and snow, heaviest near the Cascade crest, becoming slightly lighter late in the afternoon. Partial clearing further east. Mild. Moderate to strong winds. |
| Sunday Night | Mostly cloudy with light rain and snow showers mainly near the Cascade crest. Cooling trend. Windy. |
| Monday | Mostly cloudy with light rain and snow showers mainly near the Cascade crest. Cooler. |
| Monday Night | Partly to mostly cloudy with scattered light rain and snow showers ending overnight. |
Mt. Hood
| Sunday | Cloudy with periods of light rain and snow increasing in the afternoon. Mild. Windy. |
| Sunday Night | Mostly cloudy with light rain and snow showers. Cooling trend. Windy. |
| Monday | Mostly cloudy with scattered light rain and snow showers. Cooler. |
| Monday Night | Partly to mostly cloudy with isolated light rain and snow showers ending overnight. |
Issued: 7:22 AM PST Sunday, February 4, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Morning | Snow Level | 8000' | 5000' | 5500' | ' | ' | 7000' | ' | 8000' |
| Sunday Afternoon | Snow Level | 7000' | 6000' | 6000' | ' | ' | 6500' | ' | 7500' |
| Sunday Night | Snow Level | 4500' | 4000' | 4500' | ' | ' | 4500' | ' | 5500' |
| Monday | Snow Level | 4000' | 4000' | 4000' | ' | ' | 3500' | ' | 4500' |
| Monday Night | Snow Level | 3500' | 3000' | 3000' | ' | ' | 3000' | ' | 4000' |
| Sunday Evening | Snow Level | 6000' | 5000' | 5500' | ' | ' | 5500' | ' | 7000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning |
Snow Level 8000' |
| Sunday Afternoon |
Snow Level 7000' |
| Sunday Night |
Snow Level 4500' |
| Monday |
Snow Level 4000' |
| Monday Night |
Snow Level 3500' |
| Sunday Evening |
Snow Level 6000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning |
Snow Level 5000' |
| Sunday Afternoon |
Snow Level 6000' |
| Sunday Night |
Snow Level 4000' |
| Monday |
Snow Level 4000' |
| Monday Night |
Snow Level 3000' |
| Sunday Evening |
Snow Level 5000' |
| Washington Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 5500' |
| Sunday Afternoon |
Snow Level 6000' |
| Sunday Night |
Snow Level 4500' |
| Monday |
Snow Level 4000' |
| Monday Night |
Snow Level 3000' |
| Sunday Evening |
Snow Level 5500' |
| Leavenworth | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Sunday Evening |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Sunday Evening |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 7000' |
| Sunday Afternoon |
Snow Level 6500' |
| Sunday Night |
Snow Level 4500' |
| Monday |
Snow Level 3500' |
| Monday Night |
Snow Level 3000' |
| Sunday Evening |
Snow Level 5500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Sunday Evening |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning |
Snow Level 8000' |
| Sunday Afternoon |
Snow Level 7500' |
| Sunday Night |
Snow Level 5500' |
| Monday |
Snow Level 4500' |
| Monday Night |
Snow Level 4000' |
| Sunday Evening |
Snow Level 7000' |
* Easterly flow in the Cascade Passes can cause locally lower Snow or Freezing levels than areas further west.
Freezing Level is when no precipitation is forecast.
Precipitation Forecast
| Monday | Monday | |
|---|---|---|
| Hurricane Ridge | 0.25 - 0.50 | LT 0.10 |
| Mt Baker Ski Area | 0 - 2.00 | 0 - 0.50 |
| Washington Pass | 0 - 0.75 | LT 0.25 |
| Stevens Pass | 0 - 2.00 | 0.50 - 0.75 |
| Snoqualmie Pass | 2.00 - 2.50 | 0.50 - 0.75 |
| Mission Ridge | LT 0.25 | LT 0.10 |
| Crystal Mt | 0 - 0.50 | LT 0.10 |
| Paradise | 2.00 - 3.00 | LT 0.25 |
| White Pass | 0.75 - 1.00 | LT 0.10 |
| Mt Hood Meadows | 0.50 - 0.75 | LT 0.10 |
| Timberline | 0.50 - 0.75 | LT 0.10 |
LT = less than; WE or Water equivalent is the liquid water equivalent of melted snow in hundredths of inches. As a rough approximation 1 inch of snow = about .10 inches WE, or 10 inches of snow = about 1 inch WE.
Issued: 7:22 AM PST Sunday, February 4, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Morning | WSW 10 - 20 | SW 10 - 20 | WSW 20 - 35 | --- - | W 20 - 30 |
| Sunday Afternoon | WSW 20 - 30 | SW 20 - 30 | SW 25 - 45 | --- - | WSW 25 - 35 |
| Sunday Night | W 15 - 25 | WSW 15 - 25 | WSW 20 - 30 | --- - | W 30 - 40 |
| Monday Morning | W 10 - 20 | SW 10 - 20 | WSW 15 - 25 | --- - | W 20 - 30 |
| Monday Afternoon | W 15 - 25 | SW 10 - 20 | WSW 10 - 20 | --- - | W 20 - 30 |
| Monday Night | W 10 - 20 | SW 5 - 15 | W 10 - 20 | --- - | W 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning | WSW 10 - 20 |
| Sunday Afternoon | WSW 20 - 30 |
| Sunday Night | W 15 - 25 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 15 - 25 |
| Monday Night | W 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning | WSW 20 - 35 |
| Sunday Afternoon | SW 25 - 45 |
| Sunday Night | WSW 20 - 30 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | W 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning | W 20 - 30 |
| Sunday Afternoon | WSW 25 - 35 |
| Sunday Night | W 30 - 40 |
| Monday Morning | W 20 - 30 |
| Monday Afternoon | W 20 - 30 |
| Monday Night | W 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Morning | WSW 10 - 20 |
| Sunday Afternoon | WSW 20 - 30 |
| Sunday Night | W 15 - 25 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 15 - 25 |
| Monday Night | W 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | WSW 20 - 35 |
| Sunday Afternoon | SW 25 - 45 |
| Sunday Night | WSW 20 - 30 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | W 20 - 30 |
| Sunday Afternoon | WSW 25 - 35 |
| Sunday Night | W 30 - 40 |
| Monday Morning | W 20 - 30 |
| Monday Afternoon | W 20 - 30 |
| Monday Night | W 15 - 25 |
Directions above indicate the direction the wind blows from on the 16-point cardinal scale. These winds indicate "free" winds, or those winds in the atmosphere not influenced by terrain. Topographical effects may produce greater or lower wind speeds in certain locations as well as significant variations in direction.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Morning | W 40 - 50 | W 50 - 60 | W 45 - 55 | --- - | W 35 - 45 |
| Sunday Afternoon | W 40 - 50 | W 55 - 65 | W 50 - 60 | --- - | W 50 - 60 |
| Sunday Night | W 30 - 40 | W 40 - 50 | WNW 40 - 50 | --- - | WNW 45 - 55 |
| Monday Morning | W 20 - 30 | W 25 - 35 | NW 35 - 45 | --- - | NW 45 - 55 |
| Monday Afternoon | W 15 - 25 | W 25 - 35 | NW 35 - 45 | --- - | NW 50 - 60 |
| Monday Night | WNW 10 - 20 | WNW 15 - 25 | NW 30 - 40 | --- - | NW 50 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | W 40 - 50 |
| Sunday Afternoon | W 40 - 50 |
| Sunday Night | W 30 - 40 |
| Monday Morning | W 20 - 30 |
| Monday Afternoon | W 15 - 25 |
| Monday Night | WNW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Morning | W 50 - 60 |
| Sunday Afternoon | W 55 - 65 |
| Sunday Night | W 40 - 50 |
| Monday Morning | W 25 - 35 |
| Monday Afternoon | W 25 - 35 |
| Monday Night | WNW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | W 45 - 55 |
| Sunday Afternoon | W 50 - 60 |
| Sunday Night | WNW 40 - 50 |
| Monday Morning | NW 35 - 45 |
| Monday Afternoon | NW 35 - 45 |
| Monday Night | NW 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | W 35 - 45 |
| Sunday Afternoon | W 50 - 60 |
| Sunday Night | WNW 45 - 55 |
| Monday Morning | NW 45 - 55 |
| Monday Afternoon | NW 50 - 60 |
| Monday Night | NW 50 - 60 |
Directions above indicate the direction the wind blows from on the 16-point cardinal scale. These winds indicate "free" winds, or those winds in the atmosphere not influenced by terrain. Topographical effects may produce greater or lower wind speeds in certain locations as well as significant variations in direction.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Feb 3, 2018
The NWAC program is administered by the USDA-Forest Service and operates from the National Weather Service Forecast Office in Seattle. NWAC services are made possible by important collaboration and support from a wide variety of federal, state and private cooperators.