Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Sunday & Sunday
A low pressure system sliding down along the Washington Coast today will rotate showers through mainly the Mt. Hood, south and central Washington Cascades today. As the low slides south, a partial drying and clearing trend will ensue for the northwest Cascades with a mix of sun and clouds likely by the afternoon. While 5-9 inches of low density snow accumulating at Stevens and Snoqualmie Passes respectively overnight, the highest accumulations of new snow forecast during the daylight hours should fall in the southwest Cascades affecting White Pass, Crystal, and Paradise. A light upslope component along the east slopes will allow light snow showers to increase for the southeast and central-east Cascades in the afternoon while the northeast Cascades also partially dry out. There should be a slight rise in snow levels today but overall the air mass will be seasonally cool. As the flow turns light E-NE this afternoon for areas north of the low pressure system, light upslope snow showers should develop and produce a few inches of new snow along the north slopes of the Olympics.
Showers should taper off overnight as the low fills and the longwave trough axis shifts to the inland NW by early Monday morning. A weaker weather disturbance sliding down in similar fashion along the Washington Coast on Monday in NW flow aloft should increase shower activity for the southwest/central-west Cascades including Mt. Hood in the afternoon. A weak convergence zone oriented may also form in the Snoqualmie Pass area Monday afternoon and evening. With the low snow levels continuing, the lower density snowfall should continue to make the most of out of rather light water amounts. Showers should once again taper off Monday night.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Sunday Morning |
Cloudy with light snow showers north Cascades. Light to occasionally moderate snow showers south and central Cascades. |
| Sunday Afternoon - Sunday Evening |
Partly sunny north Cascades. Partly to mostly cloudy central Cascades with scattered light snow showers. Cloudy with light to occasionally moderate snow showers south Cascades. |
| Sunday Night - Monday Morning |
Partly cloudy north Cascades. Mostly cloudy with isolated snow showers south and central Cascades. |
| Monday Afternoon - Monday Evening |
Mostly cloudy with scattered light snow showers north Cascades. Cloudy with light snow showers central and south Cascades. |
| Monday Night |
Partly to mostly cloudy with isolated light snow showers. |
East slopes of the Washington Cascades
| Sunday Morning |
Cloudy with scattered light snow showers. |
| Sunday Afternoon - Sunday Evening |
Partly sunny northeast Cascades. Cloudy central-east and southeast Cascades with light snow showers. |
| Sunday Night - Monday Morning |
Partly cloudy northeast Cascades. Mostly cloudy with isolated snow showers southeast and central-east Cascades. |
| Monday Afternoon - Monday Evening |
Mostly cloudy with scattered light snow showers northeast Cascades. Cloudy with light snow showers central-east and southeast Cascades. |
| Monday Night |
Becoming partly cloudy with isolated light snow showers tapering off. |
Olympics
| Sunday |
Cloudy with light to occasionally moderate snow showers especially north slopes of the Olympics. |
| Sunday Night - Monday Morning |
Mostly cloudy with isolated snow showers. |
| Monday Afternoon - Monday Evening |
Mostly cloudy with scattered light snow showers. |
| Monday Night |
Partly to mostly cloudy with isolated light snow showers tapering off. |
Mt. Hood Area
| Sunday - Sunday Evening |
Light to occasionally moderate snow showers. |
| Sunday Night - Monday Morning |
Mostly cloudy with scattered snow showers. |
| Monday Afternoon - Monday Evening |
Cloudy with light to occasionally moderate snow showers. |
| Monday Night |
Mostly cloudy with scattered light snow showers. |
Issued: 7:24 AM PST Sunday, February 26, 2017
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 * | 1000' | 0' | 0' | ' | ' | 500' | ' | 1000' |
| Sunday Afternoon | Snow Level * | 1000' | 1000' | 1000' | ' | ' | 1500' | ' | 2000' |
| Sunday Night - Monday Morning | Snow Level | 0' | 0' | 0' | ' | ' | 0' | ' | 0' |
| Monday Afternoon | Snow Level | 500' | 0' | 500' | ' | ' | 1000' | ' | 2000' |
| Monday Night | Snow Level | 0' | 0' | 0' | ' | ' | 0' | ' | 1500' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 0' |
| Monday Afternoon |
Snow Level 500' |
| Monday Night |
Snow Level 0' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning |
Snow Level 0' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 0' |
| Monday Afternoon |
Snow Level 0' |
| Monday Night |
Snow Level 0' |
| Washington Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 0' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 0' |
| Monday Afternoon |
Snow Level 500' |
| Monday Night |
Snow Level 0' |
| Leavenworth | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 0' |
| Monday Afternoon |
Snow Level 1000' |
| Monday Night |
Snow Level 0' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2000' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level 0' |
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 1500' |
* 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
| Sunday | Sunday | |
|---|---|---|
| Hurricane Ridge | 0.25 - 0.50 | LT 0.10 |
| Mt Baker Ski Area | LT 0.25 | LT 0.10 |
| Washington Pass | LT 0.25 | LT 0.10 |
| Stevens Pass | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | 0.25 - 0.50 | LT 0.25 |
| Mission Ridge | LT 0.25 | LT 0.10 |
| Crystal Mt | 0 - 0.50 | LT 0.25 |
| Paradise | 0 - 0.75 | LT 0.25 |
| White Pass | 0 - 0.50 | LT 0.25 |
| Mt Hood Meadows | 0.50 - 0.75 | 0.50 - 0.75 |
| Timberline | 0 - 0.75 | 0.50 - 0.75 |
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: 7:24 AM PST Sunday, February 26, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Morning | SE 0 - 10 | SE 0 - 10 | SW 10 - 20 | --- - | SW 10 - 20 |
| Sunday Afternoon | ENE 10 - 20 | NE 5 - 15 | E 5 - 15 | --- - | SW 5 - 15 |
| Sunday Night - Monday Morning | W 0 - 10 | E 0 - 10 | W 0 - 10 | --- - | WSW 0 - 10 |
| Monday Afternoon | VAR 0 - 10 | W 0 - 10 | WSW 5 - 15 | --- - | W 10 - 20 |
| Monday Night | W 5 - 15 | W 0 - 10 | WSW 5 - 15 | --- - | W 15 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | ENE 10 - 20 |
| Sunday Night - Monday Morning | W 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | W 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | NE 5 - 15 |
| Sunday Night - Monday Morning | E 0 - 10 |
| Monday Afternoon | W 0 - 10 |
| Monday Night | W 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | E 5 - 15 |
| Sunday Night - Monday Morning | W 0 - 10 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | WSW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | SW 5 - 15 |
| Sunday Night - Monday Morning | WSW 0 - 10 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 15 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | ENE 10 - 20 |
| Sunday Night - Monday Morning | W 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | W 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | NE 5 - 15 |
| Sunday Night - Monday Morning | E 0 - 10 |
| Monday Afternoon | W 0 - 10 |
| Monday Night | W 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | E 5 - 15 |
| Sunday Night - Monday Morning | W 0 - 10 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | WSW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | SW 5 - 15 |
| Sunday Night - Monday Morning | WSW 0 - 10 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 15 - 30 |
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 | SW 5 - 15 | WSW 0 - 10 | WSW 15 - 25 | --- - | W 25 - 40 |
| Sunday Afternoon | E 5 - 15 | NE 5 - 15 | SE 5 - 15 | --- - | W 15 - 25 |
| Sunday Night - Monday Morning | W 10 - 20 | W 10 - 20 | WNW 10 - 20 | --- - | W 10 - 20 |
| Monday Afternoon - Monday Night | W 10 - 20 | W 5 - 15 | W 15 - 25 | --- - | W 20 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SW 5 - 15 |
| Sunday Afternoon | E 5 - 15 |
| Sunday Night - Monday Morning | W 10 - 20 |
| Monday Afternoon - Monday Night | W 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Morning | WSW 0 - 10 |
| Sunday Afternoon | NE 5 - 15 |
| Sunday Night - Monday Morning | W 10 - 20 |
| Monday Afternoon - Monday Night | W 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | WSW 15 - 25 |
| Sunday Afternoon | SE 5 - 15 |
| Sunday Night - Monday Morning | WNW 10 - 20 |
| Monday Afternoon - Monday Night | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | W 25 - 40 |
| Sunday Afternoon | W 15 - 25 |
| Sunday Night - Monday Morning | W 10 - 20 |
| Monday Afternoon - Monday Night | W 20 - 35 |
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 25, 2017
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.