Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Thursday & Sunday
A cold upper level low positioned along the west coast of British Columbia will rotate two troughs through the region over the next 24 hours. The first one will lift through this afternoon, somewhat invigorating showers in the afternoon. The second one will pass through tonight with light additional snowfall continuing, especially along the west slopes of the Cascades and Mt. Hood. Some of the coldest air seen in some time will keep snow levels low throughout the short term.
The flow aloft will become zonal (westerly) on Friday as orographic showers take over and continue to favor the west slopes of the Cascades. Crest-level westerlies will stay moderate from this afternoon through Friday night. A fast moving low pressure system will approach the Pacific Northwest Friday night, with showers seamlessly transitioning to steady snow and becoming moderate for Mt. Hood and the south and central Cascades after midnight.
Weather Forecast
Olympics
| Thursday | Cloudy with light snow showers becoming scattered in the afternoon. |
| Thursday Night | Light snow showers. |
| Friday | Light snow showers. |
| Friday Night | Light snow showers becoming light to moderate snow after midnight. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Thursday | Increasing clouds during the day. Isolated snow showers in the morning becoming widespread light snow showers in the afternoon. |
| Thursday Night | Light to occasionally moderate snow showers. Moderate crest level winds. |
| Friday | Light to occasionally moderate snow showers. Moderate crest level winds. |
| Friday Night | Light snow showers becoming light snow after midnight, except moderate Snoqualmie Pass and south. Moderate crest level winds. |
East Slopes of the Washington Cascades
| Thursday | Partly cloudy in the morning becoming mostly cloudy in the afternoon. Isolated snow showers in the morning becoming scattered light snow showers in the afternoon. |
| Thursday Night | Light snow showers with decreasing clouds and shower activity further east of the crest. Moderate crest level winds. |
| Friday | Light snow showers with decreasing clouds and shower activity further east of the crest. Moderate crest level winds. |
| Friday Night | Light snow showers becoming light snow after midnight central-east and southeast Cascades. Moderate crest level winds. |
Mt. Hood
| Thursday | Cloudy with scattered light snow showers in the morning increasing in the afternoon. |
| Thursday Night | Light to occasionally moderate snow showers. Moderate alpine winds. |
| Friday | Light to occasionally moderate snow showers. Moderate alpine winds. |
| Friday Night | Light to moderate snow showers becoming moderate snow after midnight. Moderate alpine winds increasing after midnight. |
Issued: 7:14 AM PST Thursday, January 25, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Thursday Morning | Snow Level | 1000' | 500' | 500' | ' | ' | 1000' | ' | 1000' |
| Thursday Afternoon | Snow Level | 1500' | 1000' | 1000' | ' | ' | 1500' | ' | 2000' |
| Thursday Night | Snow Level | 500' | 500' | 0' | ' | ' | 500' | ' | 1500' |
| Friday Morning | Snow Level | 500' | 500' | 0' | ' | ' | 500' | ' | 1500' |
| Friday Afternoon | Snow Level | 1500' | 1000' | 1000' | ' | ' | 1500' | ' | 2500' |
| Friday Night | Snow Level * | 3000' | 1500' | 1000' | ' | ' | 1500' | ' | 2500' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 1500' |
| Thursday Night |
Snow Level 500' |
| Friday Morning |
Snow Level 500' |
| Friday Afternoon |
Snow Level 1500' |
| Friday Night |
Snow Level 3000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Thursday Morning |
Snow Level 500' |
| Thursday Afternoon |
Snow Level 1000' |
| Thursday Night |
Snow Level 500' |
| Friday Morning |
Snow Level 500' |
| Friday Afternoon |
Snow Level 1000' |
| Friday Night |
Snow Level 1500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Thursday Morning |
Snow Level 500' |
| Thursday Afternoon |
Snow Level 1000' |
| Thursday Night |
Snow Level 0' |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 1000' |
| Friday Night |
Snow Level 1000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Thursday Morning |
Snow Level ' |
| Thursday Afternoon |
Snow Level ' |
| Thursday Night |
Snow Level ' |
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Thursday Morning |
Snow Level ' |
| Thursday Afternoon |
Snow Level ' |
| Thursday Night |
Snow Level ' |
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 1500' |
| Thursday Night |
Snow Level 500' |
| Friday Morning |
Snow Level 500' |
| Friday Afternoon |
Snow Level 1500' |
| Friday Night |
Snow Level 1500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Morning |
Snow Level ' |
| Thursday Afternoon |
Snow Level ' |
| Thursday Night |
Snow Level ' |
| Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 2000' |
| Thursday Night |
Snow Level 1500' |
| Friday Morning |
Snow Level 1500' |
| Friday Afternoon |
Snow Level 2500' |
| Friday Night |
Snow Level 2500' (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
| Sunday | Sunday | |
|---|---|---|
| Hurricane Ridge | 0.25 - 0.50 | 0 - 0.50 |
| Mt Baker Ski Area | 0.75 - 1.00 | 0 - 0.50 |
| Washington Pass | LT 0.25 | LT 0.25 |
| Stevens Pass | LT 0.25 | 0 - 0.50 |
| Snoqualmie Pass | 0 - 0.50 | 0.75 - 1.00 |
| Mission Ridge | LT 0.10 | LT 0.25 |
| Crystal Mt | LT 0.25 | 0.75 - 1.00 |
| Paradise | 0.50 - 0.75 | 0 - 1.50 |
| White Pass | 0.25 - 0.50 | 0.75 - 1.00 |
| Mt Hood Meadows | 0 - 0.75 | 1.00 - 1.50 |
| Timberline | 0.75 - 1.00 | 0 - 1.50 |
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: 7:14 AM PST Thursday, January 25, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Morning | S 5 - 15 | SE 0 - 10 | SE 10 - 20 | --- - | SSW 10 - 20 |
| Thursday Afternoon | SW 10 - 20 | S 5 - 15 | SW 15 - 25 | --- - | SW 15 - 25 |
| Thursday Night | SW 10 - 20 | S 5 - 15 | SW 15 - 25 | --- - | SW 15 - 25 |
| Friday Morning | SW 15 - 25 | SW 10 - 20 | SW 15 - 30 | --- - | SW 20 - 30 |
| Friday Afternoon | SW 10 - 20 | SW 5 - 15 | SW 15 - 25 | --- - | SW 15 - 25 |
| Friday Night | SE 15 - 25 | SE 5 - 15 | SE 10 - 20 | --- - | SSW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Morning | S 5 - 15 |
| Thursday Afternoon | SW 10 - 20 |
| Thursday Night | SW 10 - 20 |
| Friday Morning | SW 15 - 25 |
| Friday Afternoon | SW 10 - 20 |
| Friday Night | SE 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Thursday Morning | SE 0 - 10 |
| Thursday Afternoon | S 5 - 15 |
| Thursday Night | S 5 - 15 |
| Friday Morning | SW 10 - 20 |
| Friday Afternoon | SW 5 - 15 |
| Friday Night | SE 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday Morning | SE 10 - 20 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | SW 15 - 25 |
| Friday Morning | SW 15 - 30 |
| Friday Afternoon | SW 15 - 25 |
| Friday Night | SE 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Thursday Morning | SSW 10 - 20 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | SW 15 - 25 |
| Friday Morning | SW 20 - 30 |
| Friday Afternoon | SW 15 - 25 |
| Friday Night | SSW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday Morning | S 5 - 15 |
| Thursday Afternoon | SW 10 - 20 |
| Thursday Night | SW 10 - 20 |
| Friday Morning | SW 15 - 25 |
| Friday Afternoon | SW 10 - 20 |
| Friday Night | SE 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Morning | SE 0 - 10 |
| Thursday Afternoon | S 5 - 15 |
| Thursday Night | S 5 - 15 |
| Friday Morning | SW 10 - 20 |
| Friday Afternoon | SW 5 - 15 |
| Friday Night | SE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Morning | SE 10 - 20 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | SW 15 - 25 |
| Friday Morning | SW 15 - 30 |
| Friday Afternoon | SW 15 - 25 |
| Friday Night | SE 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Morning | SSW 10 - 20 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | SW 15 - 25 |
| Friday Morning | SW 20 - 30 |
| Friday Afternoon | SW 15 - 25 |
| Friday Night | SSW 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 | |
|---|---|---|---|---|---|
| Thursday Morning | SW 10 - 20 | SW 20 - 30 | SW 20 - 30 | --- - | SW 30 - 40 |
| Thursday Afternoon | SW 15 - 25 | SW 10 - 20 | WSW 30 - 40 | --- - | SW 30 - 40 |
| Thursday Night | SW 15 - 25 | WSW 15 - 25 | WSW 30 - 40 | --- - | WSW 35 - 45 |
| Friday Morning | SW 20 - 30 | SW 25 - 35 | WSW 30 - 40 | --- - | WSW 35 - 45 |
| Friday Afternoon | SW 20 - 30 | WSW 25 - 35 | WSW 30 - 40 | --- - | SW 30 - 40 |
| Friday Night | SW 20 - 30 | SW 15 - 25 | SW 30 - 40 | --- - | SW 35 - 50 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | SW 15 - 25 |
| Friday Morning | SW 20 - 30 |
| Friday Afternoon | SW 20 - 30 |
| Friday Night | SW 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday Morning | SW 20 - 30 |
| Thursday Afternoon | SW 10 - 20 |
| Thursday Night | WSW 15 - 25 |
| Friday Morning | SW 25 - 35 |
| Friday Afternoon | WSW 25 - 35 |
| Friday Night | SW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Morning | SW 20 - 30 |
| Thursday Afternoon | WSW 30 - 40 |
| Thursday Night | WSW 30 - 40 |
| Friday Morning | WSW 30 - 40 |
| Friday Afternoon | WSW 30 - 40 |
| Friday Night | SW 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Morning | SW 30 - 40 |
| Thursday Afternoon | SW 30 - 40 |
| Thursday Night | WSW 35 - 45 |
| Friday Morning | WSW 35 - 45 |
| Friday Afternoon | SW 30 - 40 |
| Friday Night | SW 35 - 50 |
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 Jan 23, 2018
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