Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Tuesday & Wednesday
We have one more day of high freezing levels in store for us with a high amplitude upper level ridge offshore. Cool easterly flow will ease near the Cascade Passes this afternoon and temperatures should warm nicely at all elevations under mostly sunny skies.
A weak frontal system will push into central British Columbia Wednesday, and bring an increase in clouds, mainly for the Olympics and north and central Cascades. The associated upper level trough will dig over B.C. and WA state late Wednesday night, with a further increase in cloudiness and light showers expected beginning Wednesday night.
Weather Forecast
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Tuesday |
Mostly sunny. Mild. |
| Tuesday Night - Wednesday Morning |
Mostly clear, then becoming mostly cloudy with increasing high clouds overnight. |
| Wednesday Afternoon |
Partly cloudy south Cascades, mostly cloudy central and north Cascades and Olympics with a chance of very light rain and snow showers. |
| Wednesday Night |
Mostly cloudy with light rain and snow showers. |
East slopes of the Washington Cascades
| Tuesday |
Mostly sunny. Mild. |
| Tuesday Night - Wednesday Morning |
Mostly clear, then becoming partly to mostly cloudy with increasing high clouds overnight. |
| Wednesday Afternoon |
Partly to mostly cloudy with a chance of very light rain and snow showers near the Cascade crest. |
| Wednesday Night |
Mostly cloudy with light rain and snow showers near the Cascade crest. |
Mt. Hood Area
| Tuesday |
Mostly sunny. Mild. |
| Tuesday Night |
Mostly clear. |
| Wednesday |
Mostly clear in the morning becoming partly cloudy in the afternoon. |
| Wednesday Night |
Becoming mostly cloudy with a chance of light rain and snow showers. |
Issued: 1:48 PM PST Tuesday, February 17, 2015
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Tuesday Afternoon | Freezing Level * | 12500' | 11500' | 10000' | ' | ' | 12000' | ' | 13000' |
| Tuesday Night - Wednesday Morning | Freezing Level | 10500' | 9000' | 8000' | ' | ' | 9000' | ' | 11500' |
| Wednesday Afternoon | Snow Level | 6000' | 5500' | 5500' | ' | ' | 6000' | ' | 8500' |
| Wednesday Night | Snow Level | 4500' | 4500' | 4500' | ' | ' | 4500' | ' | 6500' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Afternoon |
Freezing Level 12500' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Freezing Level 10500' |
| Wednesday Afternoon |
Snow Level 6000' |
| Wednesday Night |
Snow Level 4500' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Afternoon |
Freezing Level 11500' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Freezing Level 9000' |
| Wednesday Afternoon |
Snow Level 5500' |
| Wednesday Night |
Snow Level 4500' |
| Washington Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Freezing Level 8000' |
| Wednesday Afternoon |
Snow Level 5500' |
| Wednesday Night |
Snow Level 4500' |
| Leavenworth | Elevation |
|---|---|
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Freezing Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Freezing Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Freezing Level 12000' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Freezing Level 9000' |
| Wednesday Afternoon |
Snow Level 6000' |
| Wednesday Night |
Snow Level 4500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Freezing Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Afternoon |
Freezing Level 13000' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Freezing Level 11500' |
| Wednesday Afternoon |
Snow Level 8500' |
| Wednesday 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 | 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: 1:48 PM PST Tuesday, February 17, 2015
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Afternoon | SE 0 - 10 | SE 0 - 10 | SE 5 - 15 | --- - | S 0 - 10 |
| Tuesday Night - Wednesday Morning | SW 5 - 15 | S 10 - 20 | SW 10 - 20 | --- - | SW 10 - 20 |
| Wednesday Afternoon | W 10 - 20 | WSW 10 - 20 | W 10 - 20 | --- - | W 10 - 20 |
| Wednesday Night | W 5 - 15 | W 5 - 15 | W 5 - 15 | --- - | W 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Afternoon | SE 0 - 10 |
| Tuesday Night - Wednesday Morning | SW 5 - 15 |
| Wednesday Afternoon | W 10 - 20 |
| Wednesday Night | W 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Afternoon | SE 0 - 10 |
| Tuesday Night - Wednesday Morning | S 10 - 20 |
| Wednesday Afternoon | WSW 10 - 20 |
| Wednesday Night | W 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Afternoon | SE 5 - 15 |
| Tuesday Night - Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon | W 10 - 20 |
| Wednesday Night | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night - Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Afternoon | S 0 - 10 |
| Tuesday Night - Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon | W 10 - 20 |
| Wednesday Night | W 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Afternoon | SE 0 - 10 |
| Tuesday Night - Wednesday Morning | SW 5 - 15 |
| Wednesday Afternoon | W 10 - 20 |
| Wednesday Night | W 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Afternoon | SE 0 - 10 |
| Tuesday Night - Wednesday Morning | S 10 - 20 |
| Wednesday Afternoon | WSW 10 - 20 |
| Wednesday Night | W 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | SE 5 - 15 |
| Tuesday Night - Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon | W 10 - 20 |
| Wednesday Night | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night - Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Afternoon | S 0 - 10 |
| Tuesday Night - Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon | W 10 - 20 |
| Wednesday Night | W 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 | |
|---|---|---|---|---|---|
| Tuesday Afternoon | NW 5 - 15 | NNW 10 - 20 | NNW 5 - 15 | --- - | NW 5 - 15 |
| Tuesday Night - Wednesday Morning | SW 10 - 20 | WSW 10 - 20 | WSW 15 - 25 | --- - | W 15 - 25 |
| Wednesday Afternoon - Wednesday Night | W 20 - 30 | W 25 - 35 | W 30 - 40 | --- - | W 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Afternoon | NW 5 - 15 |
| Tuesday Night - Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon - Wednesday Night | W 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | NNW 10 - 20 |
| Tuesday Night - Wednesday Morning | WSW 10 - 20 |
| Wednesday Afternoon - Wednesday Night | W 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | NNW 5 - 15 |
| Tuesday Night - Wednesday Morning | WSW 15 - 25 |
| Wednesday Afternoon - Wednesday Night | W 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night - Wednesday Morning | --- - |
| Wednesday Afternoon - Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Afternoon | NW 5 - 15 |
| Tuesday Night - Wednesday Morning | W 15 - 25 |
| Wednesday Afternoon - Wednesday Night | W 25 - 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: 1:48 PM PST Tuesday, February 17, 2015
Extended Weather Synopsis for Wednesday night through Wednesday
The trough should produce light showers mainly for the west slopes of the Cascades and Olympics Thursday. Snow levels will lower to moderate levels... especially for this winter... but precipitation amounts are still forecast to be light. Light showers should linger through Thursday night and Friday morning. Mt. Hood will likely be drier and less cloudy than areas further north through the entire forecast period.
The upper level ridge will begin building offshore around 135 W Friday, but wrap around clouds on the back side of the trough and onshore flow at the surface should help keep clouds in the forecast and slow the clearing trend. Northerly flow aloft and an amplifying upper level ridge offshore should begin the drying and slow warming trend on Saturday.
Extended Weather
Olympics, Washington Cascades
Cloudy with light rain and snow showers. Cooler.
Mostly cloudy with isolated rain and snow showers.
Partly to mostly cloudy.
Mostly clear with slight warming trend Saturday.
Mt. Hood Area
Mostly cloudy with a chance of light rain and snow showers. Cooler.
Partly to mostly cloudy with isolated rain and snow showers.
Partly sunny.
Mostly clear with slight warming trend Saturday.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Thursday | Snow Level | 4000' - 5000' | 4000' - 5000' | 4500' - 5500' | |
| Thursday Night - Friday Morning | Snow Level | 3000' - 4000' | 3500' - 4500' | 4000' - 5000' | |
| Friday Afternoon - Friday Night | Freezing Level | 3000' - 4000' | 3500' - 4500' | 3500' - 4500' | |
| Saturday | Freezing Level | 4500' - 5500' | 4500' - 5500' | 4500' - 5500' |
| Mt. Baker | Elevation |
|---|---|
| Thursday |
Snow Level 4000' - 5000' |
| Thursday Night - Friday Morning |
Snow Level 3000' - 4000' |
| Friday Afternoon - Friday Night |
Freezing Level 3000' - 4000' |
| Saturday |
Freezing Level 4500' - 5500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday |
Snow Level 4000' - 5000' |
| Thursday Night - Friday Morning |
Snow Level 3500' - 4500' |
| Friday Afternoon - Friday Night |
Freezing Level 3500' - 4500' |
| Saturday |
Freezing Level 4500' - 5500' |
| Mt. Hood | Elevation |
|---|---|
| Thursday |
Snow Level 4500' - 5500' |
| Thursday Night - Friday Morning |
Snow Level 4000' - 5000' |
| Friday Afternoon - Friday Night |
Freezing Level 3500' - 4500' |
| Saturday |
Freezing Level 4500' - 5500' |
* 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 17, 2015
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