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Weather Synopsis for Wednesday & Wednesday
A north-south frontal boundary will hang up over western Washington today. The axis of heavier precipitation will be focused on the northwest Cascades and Olympics with lighter amounts of precipitation expected further south and east. Easterly flow this morning is causing locally lower snow levels at Stevens Pass where light wet snow is mixing down to Pass level.
An upper level trough will finally shift the frontal boundary inland Thursday morning, spreading moderate rain and snow further inland and affecting the east slopes of the Cascades. Post-frontal showers should be on the lighter side Thursday afternoon, except for locally moderate showers in the Mt. Baker area.
After a lull in the precipitation Thursday evening, a deepening low pressure system well off the Oregon Coast will spread increasing rain and snow over the region early Friday morning. Alpine winds will remain moderate over the short term. Snow levels will generally oscillate between 4500-5500 feet over the short term with slightly higher snow levels down at Mt. Hood.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Wednesday Morning |
Light to occasionally moderate rain and snow, except locally heavy northwest Cascades. |
| Wednesday Afternoon - Wednesday Night |
Periods of light rain and snow, except occasionally moderate northwest Cascades. |
| Thursday Afternoon |
Partly to mostly cloudy with isolated light rain and snow showers, except mostly cloudy with light to moderate rain and snow showers northwest Cascades. |
| Thursday Night |
Mostly cloudy in the evening, becoming cloudy overnight. Light rain and snow developing after midnight. |
| Thursday Morning |
Light to occasionally moderate rain and snow. |
Olympics
| Wednesday - Thursday Morning |
Light to occasionally moderate rain and snow. |
| Thursday Afternoon |
Partly to mostly cloudy with isolated light rain and snow showers. |
| Thursday Night |
Mostly cloudy in the evening, becoming cloudy overnight. Light rain and snow developing after midnight. |
East slopes of the Washington Cascades
| Wednesday - Wednesday Night |
Periods of light rain and snow,. |
| Thursday Afternoon |
Partly cloudy. |
| Thursday Night |
Mostly cloudy in the evening, becoming cloudy overnight. Light rain and snow developing after midnight. |
| Thursday Morning |
Light to occasionally moderate rain and snow. |
Mt. Hood Area
| Wednesday - Wednesday Night |
Cloudy. Periods of very light rain or snow. |
| Thursday Afternoon |
Partly to mostly cloudy with isolated light rain and snow showers. |
| Thursday Night |
Cloudy with light rain and snow developing after midnight. |
| Thursday Morning |
Light to occasionally moderate rain and snow. |
Issued: 7:26 AM PDT Wednesday, April 5, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Wednesday Morning | Snow Level * | 5500' | 4500' | 4500' | ' | ' | 5000' | ' | 6500' |
| Wednesday Afternoon | Snow Level | 5000' | 5000' | 5500' | ' | ' | 5500' | ' | 7000' |
| Wednesday Night - Thursday Morning | Snow Level | 4500' | 4500' | 4500' | ' | ' | 5000' | ' | 6000' |
| Thursday Afternoon - Thursday Night | Snow Level | 5000' | 4500' | 5000' | ' | ' | 5000' | ' | 6500' |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 5500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 5000' |
| Wednesday Night - Thursday Morning |
Snow Level 4500' |
| Thursday Afternoon - Thursday Night |
Snow Level 5000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 4500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 5000' |
| Wednesday Night - Thursday Morning |
Snow Level 4500' |
| Thursday Afternoon - Thursday Night |
Snow Level 4500' |
| Washington Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 4500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 5500' |
| Wednesday Night - Thursday Morning |
Snow Level 4500' |
| Thursday Afternoon - Thursday Night |
Snow Level 5000' |
| Leavenworth | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night - Thursday Morning |
Snow Level ' |
| Thursday Afternoon - Thursday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night - Thursday Morning |
Snow Level ' |
| Thursday Afternoon - Thursday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 5000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 5500' |
| Wednesday Night - Thursday Morning |
Snow Level 5000' |
| Thursday Afternoon - Thursday Night |
Snow Level 5000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night - Thursday Morning |
Snow Level ' |
| Thursday Afternoon - Thursday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 6500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 7000' |
| Wednesday Night - Thursday Morning |
Snow Level 6000' |
| Thursday Afternoon - Thursday Night |
Snow Level 6500' |
* 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
| Wednesday | Wednesday | |
|---|---|---|
| Hurricane Ridge | 0 - 0.50 | 0.25 - 0.50 |
| Mt Baker Ski Area | 1.50 - 2.00 | 0.50 - 0.75 |
| Washington Pass | 0 - 0.50 | LT 0.25 |
| Stevens Pass | 0.25 - 0.50 | LT 0.25 |
| Snoqualmie Pass | 0 - 0.50 | LT 0.25 |
| Mission Ridge | LT 0.25 | 0.25 - 0.50 |
| Crystal Mt | 0.50 - 0.75 | 0 - 0.50 |
| Paradise | 0 - 0.75 | 0 - 0.75 |
| White Pass | LT 0.25 | 0.25 - 0.50 |
| Mt Hood Meadows | LT 0.10 | 0.25 - 0.50 |
| Timberline | LT 0.10 | 0 - 0.50 |
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: 7:26 AM PDT Wednesday, April 5, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Wednesday Morning | S 10 - 20 | S 20 - 30 | SE 15 - 25 | --- - | SW 10 - 20 |
| Wednesday Afternoon | S 0 - 10 | S 15 - 30 | SE 5 - 15 | --- - | W 0 - 10 |
| Wednesday Night - Thursday Morning | SSE 0 - 10 | SE 15 - 25 | SE 10 - 20 | --- - | SW 10 - 20 |
| Thursday Afternoon | S 5 - 15 | S 5 - 15 | ESE 0 - 10 | --- - | S 0 - 10 |
| Thursday Night | E 10 - 20 | E 10 - 20 | ESE 15 - 30 | --- - | ESE 15 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Morning | S 10 - 20 |
| Wednesday Afternoon | S 0 - 10 |
| Wednesday Night - Thursday Morning | SSE 0 - 10 |
| Thursday Afternoon | S 5 - 15 |
| Thursday Night | E 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning | S 20 - 30 |
| Wednesday Afternoon | S 15 - 30 |
| Wednesday Night - Thursday Morning | SE 15 - 25 |
| Thursday Afternoon | S 5 - 15 |
| Thursday Night | E 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning | SE 15 - 25 |
| Wednesday Afternoon | SE 5 - 15 |
| Wednesday Night - Thursday Morning | SE 10 - 20 |
| Thursday Afternoon | ESE 0 - 10 |
| Thursday Night | ESE 15 - 30 |
| Mt. Rainier | Elevation |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night - Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon | W 0 - 10 |
| Wednesday Night - Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | S 0 - 10 |
| Thursday Night | ESE 15 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Wednesday Morning | S 10 - 20 |
| Wednesday Afternoon | S 0 - 10 |
| Wednesday Night - Thursday Morning | SSE 0 - 10 |
| Thursday Afternoon | S 5 - 15 |
| Thursday Night | E 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Morning | S 20 - 30 |
| Wednesday Afternoon | S 15 - 30 |
| Wednesday Night - Thursday Morning | SE 15 - 25 |
| Thursday Afternoon | S 5 - 15 |
| Thursday Night | E 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Morning | SE 15 - 25 |
| Wednesday Afternoon | SE 5 - 15 |
| Wednesday Night - Thursday Morning | SE 10 - 20 |
| Thursday Afternoon | ESE 0 - 10 |
| Thursday Night | ESE 15 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night - Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon | W 0 - 10 |
| Wednesday Night - Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | S 0 - 10 |
| Thursday Night | ESE 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 | |
|---|---|---|---|---|---|
| Wednesday Morning | SW 30 - 40 | SW 30 - 40 | SW 45 - 55 | --- - | SW 35 - 45 |
| Wednesday Afternoon - Wednesday Evening | SW 30 - 40 | SW 20 - 30 | SW 45 - 55 | --- - | SSW 25 - 35 |
| Wednesday Night - Thursday Morning | SSW 30 - 40 | SSW 15 - 25 | SW 35 - 45 | --- - | S 20 - 30 |
| Thursday Afternoon | SW 15 - 25 | SW 20 - 30 | SW 25 - 35 | --- - | SW 30 - 40 |
| Thursday Night | S 25 - 35 | SSE 25 - 35 | SSE 35 - 45 | --- - | SSW 45 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Morning | SW 30 - 40 |
| Wednesday Afternoon - Wednesday Evening | SW 30 - 40 |
| Wednesday Night - Thursday Morning | SSW 30 - 40 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | S 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Wednesday Morning | SW 30 - 40 |
| Wednesday Afternoon - Wednesday Evening | SW 20 - 30 |
| Wednesday Night - Thursday Morning | SSW 15 - 25 |
| Thursday Afternoon | SW 20 - 30 |
| Thursday Night | SSE 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Morning | SW 45 - 55 |
| Wednesday Afternoon - Wednesday Evening | SW 45 - 55 |
| Wednesday Night - Thursday Morning | SW 35 - 45 |
| Thursday Afternoon | SW 25 - 35 |
| Thursday Night | SSE 35 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Afternoon - Wednesday Evening | --- - |
| Wednesday Night - Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Morning | SW 35 - 45 |
| Wednesday Afternoon - Wednesday Evening | SSW 25 - 35 |
| Wednesday Night - Thursday Morning | S 20 - 30 |
| Thursday Afternoon | SW 30 - 40 |
| Thursday Night | SSW 45 - 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 Apr 4, 2017
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