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 & Monday
A rather quiet weather day continues for for the PNW today. An upper level ridge offshore should slowly shift closer today while a deep upper low remains well offshore. Mostly cloudy skies along the west slopes have given way to mostly sunny skies as seen elsewhere across the region. Winds will be light with a slight rise in freezing levels and temperatures versus Saturday. High clouds should increase in the afternoon and tonight.
Warm frontal precipitation may glance the Olympics and north Cascades late Sunday night or Monday. As the front lifts further north Monday afternoon, with a return to mostly sunny skies with perhaps filtered sunshine at much warmer freezing levels. Easterly winds at pass and crest levels will counteract this warming to some degree...but since it's late March the cooling effects of easterly flow will be somewhat muted. Cooler freezing levels are expected over the northeast Cascades Monday.
The north-south oriented front extending from the upper low should push along the Washington coast and Olympics Monday night, possibly spreading light rain and snow inland by late Monday night.
Weather Forecast
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Sunday |
Mostly sunny with some high clouds in the afternoon. |
| Sunday Night - Monday Morning |
Increasing mid and high clouds overnight, periods of light rain or snow possible Olympics and north Cascades late tonight and Monday morning. |
| Monday Afternoon |
Becoming partly to mostly sunny. Warmer, especially away from the Cascade Passes where easterly flow will initially keep temperatures cooler. |
| Monday Night |
Light rain and snow developing over the Olympics and spreading inland late Monday night. |
East slopes of the Washington Cascades
| Sunday |
Mostly sunny with some high clouds in the afternoon. |
| Sunday Night - Monday Morning |
Increasing mid and high clouds overnight, periods of light rain or snow possible northeast Cascades late tonight and Monday morning. |
| Monday Afternoon |
Becoming partly to mostly sunny. Gradual warming. |
| Monday Night |
Increasing clouds overnight. |
Mt. Hood Area
| Sunday |
Mostly sunny. |
| Sunday Night - Monday Morning |
Becoming partly cloudy with increasing mid and high clouds overnight. |
| Monday Afternoon |
Becoming partly to mostly sunny. Warmer. |
| Monday Night |
Light rain and snow developing over the coast and spreading inland late Monday night. |
Issued: 1:32 PM PDT Sunday, March 23, 2014
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Afternoon | Freezing Level | 5000' | ' | ' | ' | ' | 5000' | ' | 7000' |
| Sunday Night - Monday Morning | Freezing Level * | 6000' | ' | ' | ' | ' | 5000' | ' | 8000' |
| Monday Afternoon | Freezing Level * | 8000' | ' | ' | ' | ' | 8000' | ' | 9000' |
| Monday Night | Snow Level * | 5000' | ' | ' | ' | ' | 4000' | ' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Afternoon |
Freezing Level 5000' |
| Sunday Night - Monday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Monday Night |
Snow Level 5000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Sunday Afternoon |
Freezing Level ' |
| Sunday Night - Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Sunday Afternoon |
Freezing Level ' |
| Sunday Night - Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Sunday Afternoon |
Freezing Level ' |
| Sunday Night - Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Sunday Afternoon |
Freezing Level ' |
| Sunday Night - Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Afternoon |
Freezing Level 5000' |
| Sunday Night - Monday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Monday Night |
Snow Level 4000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Afternoon |
Freezing Level ' |
| Sunday Night - Monday Morning |
Freezing Level ' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Afternoon |
Freezing Level 7000' |
| Sunday Night - Monday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 9000' (Easterly Flow *) |
| Monday Night |
Snow Level 5000' (Easterly Flow *) |
* 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 | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | LT 0.10 |
| Snoqualmie Pass | LT 0.10 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | 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: 1:32 PM PDT Sunday, March 23, 2014
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Afternoon - Sunday Evening | WNW 0 - 10 | --- - | WNW 0 - 10 | --- - | WNW 0 - 10 |
| Sunday Night - Monday Morning | SE 0 - 10 | --- - | SE 5 - 15 | --- - | SE 5 - 15 |
| Monday Afternoon - Monday Night | S 15 - 25 | --- - | SE 15 - 25 | --- - | S 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Afternoon - Sunday Evening | WNW 0 - 10 |
| Sunday Night - Monday Morning | SE 0 - 10 |
| Monday Afternoon - Monday Night | S 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Afternoon - Sunday Evening | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Afternoon - Sunday Evening | WNW 0 - 10 |
| Sunday Night - Monday Morning | SE 5 - 15 |
| Monday Afternoon - Monday Night | SE 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Afternoon - Sunday Evening | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Afternoon - Sunday Evening | WNW 0 - 10 |
| Sunday Night - Monday Morning | SE 5 - 15 |
| Monday Afternoon - Monday Night | S 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Afternoon - Sunday Evening | WNW 0 - 10 |
| Sunday Night - Monday Morning | SE 0 - 10 |
| Monday Afternoon - Monday Night | S 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Afternoon - Sunday Evening | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Afternoon - Sunday Evening | WNW 0 - 10 |
| Sunday Night - Monday Morning | SE 5 - 15 |
| Monday Afternoon - Monday Night | SE 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon - Sunday Evening | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Afternoon - Sunday Evening | WNW 0 - 10 |
| Sunday Night - Monday Morning | SE 5 - 15 |
| Monday Afternoon - Monday Night | S 5 - 15 |
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 - Monday Morning | --- - | --- - | NW 15 - 25 | --- - | NW 15 - 25 |
| Monday Afternoon - Monday Night | --- - | --- - | SW 20 - 30 | --- - | SW 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Afternoon - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Afternoon - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Afternoon - Monday Morning | NW 15 - 25 |
| Monday Afternoon - Monday Night | SW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon - Monday Morning | --- - |
| Monday Afternoon - Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Afternoon - Monday Morning | NW 15 - 25 |
| Monday Afternoon - Monday Night | SW 20 - 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.
Issued: 1:32 PM PDT Sunday, March 23, 2014
Extended Weather Synopsis for Monday night through Monday
The initial frontal wave on Tuesday should be weak and with southerly flow initially favoring the volcanoes and south slopes. A secondary impulse associated with the upper level low still offshore should rotate through the area Tuesday afternoon or evening, producing a period of moderate rain and snow before transitioning to showers Tuesday night. A gradual cooling trend should begin Tuesday night as cooler air associated with the upper low moves overhead and stays over the region through the extended forecast period.
The main trough axis may pass through Wednesday afternoon or night bringing a round of more moderate showers. Thursday's forecast is uncertain...we may see a decrease in shower activity or a new frontal wave developing and spreading over the area during the day.
Extended Weather
Olympics, Washington Cascades and Mt. Hood area
Light rain and snow, occasionally moderate at volcanoes and south slopes.
Light to moderate rain and snow.
Mostly cloudy with light to occasionally moderate rain and snow showers along the west slopes. Cooling trend beginning Tuesday night.
Light, except occasionally moderate rain and snow showers along the west slopes. Cooler.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday | Snow Level | ' - ' | 4000' - 5000' | 4500' - 5500' | |
| Tuesday Night - Thursday | Snow Level | ' - ' | 3000' - 4000' | 3500' - 4500' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday |
Snow Level ' - ' |
| Tuesday Night - Thursday |
Snow Level ' - ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday |
Snow Level 4000' - 5000' |
| Tuesday Night - Thursday |
Snow Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday |
Snow Level 4500' - 5500' |
| Tuesday Night - Thursday |
Snow Level 3500' - 4500' |
* 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 Mar 23, 2014
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