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
A pair of weak disturbances will move through the upper level ridge centered over the inland NW over the next 24 hours, temporarily flattening the ridge. The first one passing through today will only bring mid and high level clouds, the second one tonight will bring a chance for some very light showers. Snow/freezing levels will stay mild through the short term and offshore easterly flow will stay in the light to moderate range throughout the short term. Low clouds and cooler temperatures will be seen in the Cascade Passes, lower elevations along the east slopes of the Cascades and Mt. Hood.
The ridge will briefly rebuild over the area Wednesday and general cloudiness should decrease during the day. An open trough rotating up from a previously cut-off low pressure system off the California coast will eject northward Wednesday night, bringing a chance of light showers late Wednesday night to the Mt. Hood area.
Weather Forecast
Olympics
| Tuesday | Mostly cloudy with mid and high clouds. Mild. |
| Tuesday Night | Cloudy with periods of very light rain or snow. Mild. |
| Wednesday | Mostly cloudy in the morning becoming partly to mostly sunny in the afternoon. Mild. |
| Wednesday Night | Becoming cloudy overnight. Mild. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Tuesday | Mostly cloudy with mid and high clouds. Low clouds, breezy east winds and cooler temperatures Cascade Passes. |
| Tuesday Night | Cloudy with periods of very light rain or snow. Low clouds, breezy east winds and cooler temperatures Cascade Passes. |
| Wednesday | Mostly cloudy in the morning becoming partly to mostly sunny in the afternoon. Low clouds, breezy east winds and cooler temperatures Cascade Passes. |
| Wednesday Night | Becoming cloudy overnight. Low clouds, breezy east winds and cooler temperatures Cascade Passes. |
East Slopes of the Washington Cascades
| Tuesday | Mostly cloudy with mid and high clouds. Low clouds and cooler temperatures lower slopes. |
| Tuesday Night | Cloudy with periods of very light rain or snow. Low clouds and cooler temperatures lower slopes. |
| Wednesday | Mostly cloudy in the morning becoming partly to mostly sunny in the afternoon. Low clouds and cooler temperatures lower slopes. |
| Wednesday Night | Becoming cloudy overnight. Low clouds and cooler temperatures lower slopes. |
Mt. Hood
| Tuesday | Partly to mostly cloudy with mid and high clouds. Low clouds and cooler temperatures lower slopes. |
| Tuesday Night | Cloudy with periods of very light rain or snow. Low clouds and cooler temperatures lower slopes. |
| Wednesday | Mostly cloudy in the morning becoming partly sunny in the afternoon. Low clouds and cooler temperatures lower slopes. |
| Wednesday Night | Becoming cloudy overnight with a chance of light rain or snow showers after midnight. |
Issued: 2:24 PM PST Tuesday, January 2, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Tuesday | Freezing Level * | 9500' | 9000' | 8500' | ' | ' | 9500' | ' | 10500' |
| Tuesday Night | Snow Level * | 6000' | 6000' | 5000' | ' | ' | 6500' | ' | 7000' |
| Wednesday | Freezing Level * | 9000' | 8500' | 8000' | ' | ' | 9000' | ' | 10500' |
| Wednesday Night | Freezing Level * | 8500' | 8500' | 8000' | ' | ' | 9000' | ' | 10500' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 6000' (Easterly Flow *) |
| Wednesday |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 8500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Tuesday |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 6000' (Easterly Flow *) |
| Wednesday |
Freezing Level 8500' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 8500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Tuesday |
Freezing Level 8500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 5000' (Easterly Flow *) |
| Wednesday |
Freezing Level 8000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 8000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Tuesday |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Wednesday |
Freezing Level ' (Easterly Flow *) |
| Wednesday Night |
Freezing Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Tuesday |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Wednesday |
Freezing Level ' (Easterly Flow *) |
| Wednesday Night |
Freezing Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 6500' (Easterly Flow *) |
| Wednesday |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 9000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Wednesday |
Freezing Level ' (Easterly Flow *) |
| Wednesday Night |
Freezing Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Tuesday |
Freezing Level 10500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 7000' (Easterly Flow *) |
| Wednesday |
Freezing Level 10500' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 10500' (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
| 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: 2:24 PM PST Tuesday, January 2, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Afternoon | S 0 - 10 | ESE 0 - 10 | ESE 15 - 25 | --- - | ESE 5 - 15 |
| Tuesday Night | SE 0 - 10 | VAR 0 - 10 | ESE 5 - 15 | --- - | SE 0 - 10 |
| Wednesday | SE 0 - 10 | E 0 - 10 | ESE 10 - 20 | --- - | E 5 - 15 |
| Wednesday Night | S 0 - 10 | E 0 - 10 | ESE 10 - 20 | --- - | ESE 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Afternoon | S 0 - 10 |
| Tuesday Night | SE 0 - 10 |
| Wednesday | SE 0 - 10 |
| Wednesday Night | S 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Afternoon | ESE 0 - 10 |
| Tuesday Night | VAR 0 - 10 |
| Wednesday | E 0 - 10 |
| Wednesday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Afternoon | ESE 15 - 25 |
| Tuesday Night | ESE 5 - 15 |
| Wednesday | ESE 10 - 20 |
| Wednesday Night | ESE 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Afternoon | ESE 5 - 15 |
| Tuesday Night | SE 0 - 10 |
| Wednesday | E 5 - 15 |
| Wednesday Night | ESE 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Afternoon | S 0 - 10 |
| Tuesday Night | SE 0 - 10 |
| Wednesday | SE 0 - 10 |
| Wednesday Night | S 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Afternoon | ESE 0 - 10 |
| Tuesday Night | VAR 0 - 10 |
| Wednesday | E 0 - 10 |
| Wednesday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | ESE 15 - 25 |
| Tuesday Night | ESE 5 - 15 |
| Wednesday | ESE 10 - 20 |
| Wednesday Night | ESE 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Afternoon | ESE 5 - 15 |
| Tuesday Night | SE 0 - 10 |
| Wednesday | E 5 - 15 |
| Wednesday Night | ESE 10 - 20 |
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 | SW 10 - 20 | SW 5 - 15 | SSW 5 - 15 | --- - | SW 10 - 20 |
| Tuesday Night | W 0 - 10 | W 0 - 10 | SW 15 - 25 | --- - | SW 10 - 20 |
| Wednesday | SW 0 - 10 | SW 0 - 10 | SW 10 - 20 | --- - | SW 5 - 15 |
| Wednesday Night | SSW 10 - 20 | SW 5 - 15 | S 5 - 15 | --- - | SSE 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Afternoon | SW 10 - 20 |
| Tuesday Night | W 0 - 10 |
| Wednesday | SW 0 - 10 |
| Wednesday Night | SSW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | SW 5 - 15 |
| Tuesday Night | W 0 - 10 |
| Wednesday | SW 0 - 10 |
| Wednesday Night | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | SSW 5 - 15 |
| Tuesday Night | SW 15 - 25 |
| Wednesday | SW 10 - 20 |
| Wednesday Night | S 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Afternoon | SW 10 - 20 |
| Tuesday Night | SW 10 - 20 |
| Wednesday | SW 5 - 15 |
| Wednesday Night | SSE 15 - 25 |
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: 2:24 PM PST Tuesday, January 2, 2018
Extended Weather Synopsis for Wednesday night through Wednesday
The aforementioned trough should rotate up from the south on Thursday, bringing light showers to the mountains with an increase in clouds. A more defined but still weak frontal system will swing through on Friday from an upper low off meandering toward the PNW coast, bringing a bit heavier rain and snow. Snow levels will cool somewhat into Friday, but are still mild by January standards. The upper low will move inland on Saturday and showers should decrease during the day.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Thursday | Snow Level | 5500' - 6500' | 6000' - 7000' | 7000' - 8000' | * |
| Thursday Night | Snow Level | 6500' - 7500' | 6500' - 7500' | 6500' - 7500' | * |
| Friday | Snow Level | 5000' - 6000' | 5000' - 6000' | 5000' - 6000' | * |
| Friday Night | Snow Level | 3500' - 4500' | 3500' - 4500' | 3500' - 4500' | |
| Saturday | Snow Level | 3000' - 4000' | 3000' - 4000' | 3000' - 4000' |
| Mt. Baker | Elevation |
|---|---|
| Thursday |
Snow Level 5500' - 6500' (Easterly Flow *) |
| Thursday Night |
Snow Level 6500' - 7500' (Easterly Flow *) |
| Friday |
Snow Level 5000' - 6000' (Easterly Flow *) |
| Friday Night |
Snow Level 3500' - 4500' |
| Saturday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday |
Snow Level 6000' - 7000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6500' - 7500' (Easterly Flow *) |
| Friday |
Snow Level 5000' - 6000' (Easterly Flow *) |
| Friday Night |
Snow Level 3500' - 4500' |
| Saturday |
Snow Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Thursday |
Snow Level 7000' - 8000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6500' - 7500' (Easterly Flow *) |
| Friday |
Snow Level 5000' - 6000' (Easterly Flow *) |
| Friday Night |
Snow Level 3500' - 4500' |
| Saturday |
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 2, 2018
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