Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Sunday & Sunday
A low pressure system sliding down along the Washington Coast today will rotate showers mainly through the Mt. Hood area and the 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. A light upslope component along the east slopes of the Cascades will cause 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 Puget Sound convergence zone may also form 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
Olympics
| Sunday |
Mostly 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. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| 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 to mostly 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 Afternoon - Sunday Evening |
Mostly cloudy 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. |
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: 2:49 PM 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 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 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 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 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 Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| 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 Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night - Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| 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 0.10 | LT 0.10 |
| Washington Pass | LT 0.25 | LT 0.10 |
| Stevens Pass | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | LT 0.25 | LT 0.25 |
| Mission Ridge | LT 0.25 | LT 0.10 |
| Crystal Mt | 0.25 - 0.50 | LT 0.25 |
| Paradise | 0 - 0.75 | 0.25 - 0.50 |
| White Pass | 0.25 - 0.50 | LT 0.25 |
| Mt Hood Meadows | 0 - 0.50 | 0.50 - 0.75 |
| Timberline | 0.50 - 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: 2:49 PM PST Sunday, February 26, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Afternoon | ENE 5 - 15 | 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 Afternoon | ENE 5 - 15 |
| Sunday Night - Monday Morning | W 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | W 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| 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 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 Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| 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 Afternoon | ENE 5 - 15 |
| Sunday Night - Monday Morning | W 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | W 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| 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 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 Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| 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 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 Afternoon | E 5 - 15 |
| Sunday Night - Monday Morning | W 10 - 20 |
| Monday Afternoon - Monday Night | W 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| 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 Afternoon | SE 5 - 15 |
| Sunday Night - Monday Morning | WNW 10 - 20 |
| Monday Afternoon - Monday Night | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| 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.
Issued: 2:49 PM PST Sunday, February 26, 2017
Extended Weather Synopsis for Sunday night through Sunday
With the jet stream becoming aimed at the British Columbia/Washington border by the middle of the week, a broad area of low pressure in the NE Pacific will begin to direct a series of frontal system into the Pacific Northwest in WNW flow aloft. The details are murky, but the pattern is progressive and the systems look stronger/wetter/warmer toward the end of the work week.
Extended Weather
Olympics, Washington Cascades and Mt. Hood area
Mostly cloudy in the morning with increasing and lowering clouds in the afternoon. Light rain and snow developing in the afternoon Olympics and Washington Cascades. Light to occasionally moderate rain and snow Mt. Hood.
Light to moderate rain and snow. Windy.
Cloudy with light showers, occasionally moderate west slopes of the Cascades and Mt. Hood.
Light rain and snow Olympics and north Cascades spreading south overnight.
Becoming stormy with moderate rain and snow, except occasionally heavy west slopes of the Cascades, Olympics and Mt. Hood.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday | Snow Level | 1000' - 2000' | 2000' - 3000' | 2500' - 3500' | |
| Tuesday Night | Snow Level | 1500' - 2500' | 2500' - 3500' | 3000' - 4000' | |
| Wednesday | Snow Level | 1500' - 2500' | 2000' - 3000' | 2000' - 3000' | |
| Wednesday Night - Thursday | Snow Level | 2500' - 3500' | 2500' - 3500' | 3000' - 4000' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday |
Snow Level 1000' - 2000' |
| Tuesday Night |
Snow Level 1500' - 2500' |
| Wednesday |
Snow Level 1500' - 2500' |
| Wednesday Night - Thursday |
Snow Level 2500' - 3500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday |
Snow Level 2000' - 3000' |
| Tuesday Night |
Snow Level 2500' - 3500' |
| Wednesday |
Snow Level 2000' - 3000' |
| Wednesday Night - Thursday |
Snow Level 2500' - 3500' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday |
Snow Level 2500' - 3500' |
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 2000' - 3000' |
| Wednesday Night - Thursday |
Snow Level 3000' - 4000' |
* 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Previous forecast from Feb 26, 2017
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