Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Saturday & Saturday
Snow levels slowly decreased on Saturday with light showers continuing along the west slopes of the Cascades and Passes. Skies are clearer down near Mt. Hood and east of the Cascade crest.
The next low pressure system will track toward the central British Columbia coast tonight, spreading light rain and snow over the Olympics and north Cascades in the early morning hours of Sunday with westerly flow aloft. Light precipitation will spread south over the Washington Cascades during the day on Sunday but largely miss Mt. Hood. As a secondary shortwave digs southward from the parent NE Pacific upper level trough later Sunday, this should orient the frontal system more SW-NE Sunday afternoon and night and lead to a gradual warming trend over the region.
Locally moderate precipitation on the volcanoes should stay mainly as snow during the daylight hours Sunday. Light easterly flow will likely not be enough to help Snoqualmie Pass from warming above freezing Sunday afternoon with light snow transitioning to rain, but Stevens Pass will likely stay as snow for most or even all of the event. Crystal mountain and areas along the east slopes of the Cascades will not get much precipitation from this storm.
Weather Forecast
Olympics
| Saturday | Cloudy with scattered light rain and snow showers this morning decreasing in the afternoon. |
| Saturday Night | Cloudy with isolated light rain and snow showers in the evening then light rain and snow developing late tonight. |
| Sunday | Light rain and snow becoming light to occasionally moderate rain and snow mid-day. Warming trend. |
| Sunday Night | Light to occasionally moderate rain and snow. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Saturday | Cloudy with scattered light rain and snow showers this morning decreasing in the afternoon. |
| Saturday Night | Cloudy with isolated light rain and snow showers. |
| Sunday | Light rain and snow north Cascades spreading to the central and south Cascades in the morning. Becoming light to moderate rain and snow north of Stevens Pass mid-day through the afternoon. Slow warming trend. |
| Sunday Night | Light rain and snow, occasionally moderate volcanoes. Light freezing rain possibly mixing in near Stevens Pass. Slow warming trend. |
East Slopes of the Washington Cascades
| Saturday | Cloudy with isolated light rain and snow showers near the crest this morning ending mid-day. |
| Saturday Night | Cloudy. |
| Sunday | Light rain and snow northeast Cascades spreading to the central-east and southeast Cascades in the morning. Slow warming trend. |
| Sunday Night | Light rain and snow. |
Mt. Hood
| Saturday | Partly cloudy. |
| Saturday Night | Increasing clouds overnight. |
| Sunday | Cloudy with periods of very light rain or snow. |
| Sunday Night | Light rain and snow. |
Issued: 3:34 PM PST Saturday, January 6, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Afternoon | Snow Level | 3000' | 3000' | 3500' | ' | ' | 3000' | ' | 3000' |
| Saturday Night | Snow Level | 2500' | 2500' | 2000' | ' | ' | 2500' | ' | 3000' |
| Sunday Morning | Snow Level | 4000' | 2000' | 2000' | ' | ' | 3000' | ' | 4500' |
| Sunday Afternoon | Snow Level * | 6000' | 3500' | 3500' | ' | ' | 4500' | ' | 6000' |
| Sunday Night | Snow Level * | 6000' | 5500' | 4000' | ' | ' | 5500' | ' | 6500' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Snow Level 6000' (Easterly Flow *) |
| Sunday Night |
Snow Level 6000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Sunday Night |
Snow Level 5500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 3500' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Sunday Night |
Snow Level 4000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 3000' |
| Sunday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Sunday Night |
Snow Level 5500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' (Easterly Flow *) |
| Sunday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Snow Level 6000' (Easterly Flow *) |
| Sunday Night |
Snow Level 6500' (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
| Saturday | Saturday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | 0 - 0.50 |
| Mt Baker Ski Area | LT 0.25 | 1.00 - 1.50 |
| Washington Pass | LT 0.10 | 0.25 - 0.50 |
| Stevens Pass | LT 0.25 | 0 - 0.75 |
| Snoqualmie Pass | LT 0.25 | 0 - 0.75 |
| Mission Ridge | LT 0.10 | LT 0.25 |
| Crystal Mt | LT 0.10 | LT 0.25 |
| Paradise | LT 0.10 | 0 - 1.00 |
| White Pass | LT 0.10 | LT 0.25 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | LT 0.25 |
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: 3:34 PM PST Saturday, January 6, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Afternoon | SW 5 - 15 | SW 5 - 15 | WSW 5 - 15 | --- - | W 10 - 20 |
| Saturday Night | S 5 - 15 | S 0 - 10 | WSW 0 - 10 | --- - | W 5 - 15 |
| Sunday Morning | S 15 - 25 | SE 5 - 15 | S 5 - 15 | --- - | SW 5 - 15 |
| Sunday Afternoon | SSW 20 - 30 | SE 10 - 20 | S 5 - 15 | --- - | SW 5 - 15 |
| Sunday Night | SSW 5 - 15 | SE 10 - 20 | S 5 - 15 | --- - | S 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Afternoon | SW 5 - 15 |
| Saturday Night | S 5 - 15 |
| Sunday Morning | S 15 - 25 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | SSW 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Afternoon | SW 5 - 15 |
| Saturday Night | S 0 - 10 |
| Sunday Morning | SE 5 - 15 |
| Sunday Afternoon | SE 10 - 20 |
| Sunday Night | SE 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 0 - 10 |
| Sunday Morning | S 5 - 15 |
| Sunday Afternoon | S 5 - 15 |
| Sunday Night | S 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Saturday Afternoon | W 10 - 20 |
| Saturday Night | W 5 - 15 |
| Sunday Morning | SW 5 - 15 |
| Sunday Afternoon | SW 5 - 15 |
| Sunday Night | S 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Afternoon | SW 5 - 15 |
| Saturday Night | S 5 - 15 |
| Sunday Morning | S 15 - 25 |
| Sunday Afternoon | SSW 20 - 30 |
| Sunday Night | SSW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Afternoon | SW 5 - 15 |
| Saturday Night | S 0 - 10 |
| Sunday Morning | SE 5 - 15 |
| Sunday Afternoon | SE 10 - 20 |
| Sunday Night | SE 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 0 - 10 |
| Sunday Morning | S 5 - 15 |
| Sunday Afternoon | S 5 - 15 |
| Sunday Night | S 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Afternoon | W 10 - 20 |
| Saturday Night | W 5 - 15 |
| Sunday Morning | SW 5 - 15 |
| Sunday Afternoon | SW 5 - 15 |
| Sunday Night | S 0 - 10 |
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 | |
|---|---|---|---|---|---|
| Saturday Afternoon | W 15 - 25 | WSW 10 - 20 | W 15 - 25 | --- - | WNW 10 - 20 |
| Saturday Night | SW 15 - 25 | W 10 - 20 | W 20 - 30 | --- - | W 15 - 25 |
| Sunday Morning | SW 15 - 25 | SW 15 - 25 | WSW 20 - 30 | --- - | SW 25 - 35 |
| Sunday Afternoon | SW 25 - 35 | SW 25 - 35 | SW 30 - 40 | --- - | WSW 20 - 30 |
| Sunday Night | S 15 - 25 | SSW 15 - 25 | SSW 15 - 25 | --- - | SW 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Afternoon | W 15 - 25 |
| Saturday Night | SW 15 - 25 |
| Sunday Morning | SW 15 - 25 |
| Sunday Afternoon | SW 25 - 35 |
| Sunday Night | S 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | WSW 10 - 20 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | SW 15 - 25 |
| Sunday Afternoon | SW 25 - 35 |
| Sunday Night | SSW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | W 15 - 25 |
| Saturday Night | W 20 - 30 |
| Sunday Morning | WSW 20 - 30 |
| Sunday Afternoon | SW 30 - 40 |
| Sunday Night | SSW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Afternoon | WNW 10 - 20 |
| Saturday Night | W 15 - 25 |
| Sunday Morning | SW 25 - 35 |
| Sunday Afternoon | WSW 20 - 30 |
| Sunday 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: 3:34 PM PST Saturday, January 6, 2018
Extended Weather Synopsis for Saturday night through Saturday
With the frontal boundary splitting, the PNW will be in no-man's land on Monday with some partial clearing expected and temperatures remaining on the mild side. The associated longwave trough with the northern stream will push across the area Tuesday with increasing showers beginning Monday night. A fast moving system in W-NW flow will take aim at the area on Wednesday with slightly lower snow levels but forecast models are in poor agreement on the axis of more moderate precipitation.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday | Freezing Level | 4500' - 5500' | 5000' - 6000' | 6000' - 7000' | |
| Monday Night | Snow Level | 3500' - 4500' | 4000' - 5000' | 6000' - 7000' | |
| Tuesday | Snow Level | 3500' - 4500' | 3500' - 4500' | 3500' - 4500' | |
| Tuesday Night | Snow Level | 2000' - 3000' | 2000' - 3000' | 2500' - 3500' | |
| Wednesday | Snow Level | 2000' - 3000' | 2500' - 3500' | 3000' - 4000' |
| Mt. Baker | Elevation |
|---|---|
| Monday |
Freezing Level 4500' - 5500' |
| Monday Night |
Snow Level 3500' - 4500' |
| Tuesday |
Snow Level 3500' - 4500' |
| Tuesday Night |
Snow Level 2000' - 3000' |
| Wednesday |
Snow Level 2000' - 3000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday |
Freezing Level 5000' - 6000' |
| Monday Night |
Snow Level 4000' - 5000' |
| Tuesday |
Snow Level 3500' - 4500' |
| Tuesday Night |
Snow Level 2000' - 3000' |
| Wednesday |
Snow Level 2500' - 3500' |
| Mt. Hood | Elevation |
|---|---|
| Monday |
Freezing Level 6000' - 7000' |
| Monday Night |
Snow Level 6000' - 7000' |
| Tuesday |
Snow Level 3500' - 4500' |
| Tuesday Night |
Snow Level 2500' - 3500' |
| Wednesday |
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 Jan 6, 2018
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