Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Wednesday & Thursday
Weak warm frontal moisture will slip under the ridge located offshore at 130W, bringing some light rain and snow to the area today with moderate NW flow aloft. The PNW is centered between a warmer air mass to our south and a much colder air mass to the north and as a result, there is a tight N-S gradient for snow levels across the area with much warmer air over Mt. Hood and snow levels near sea level for much of the Washington Cascades
A developing low offshore will renew warm frontal precipitation over the Olympics and north Cascades Thursday morning with precipitation spreading south during the daylight hours. An occluded front will pass through Thursday evening with a transition to showers overnight. Snow levels will gradually rise during the day on Thursday and also Thursday night. Easterly flow through the Passes should keep the precipitation type as snow during the day with a likely switch to rain for Snoqualmie in the evening and for Stevens after midnight. Mt. Hood looks mild with potentially heavy rain below 7000 feet Thursday night.
Weather Forecast
Olympics
| Wednesday | Cloudy with periods of light snow. |
| Wednesday Night | Cloudy with periods of light rain and snow. Warming trend. |
| Thursday | Light to occasionally moderate rain and snow. Slow warming trend. |
| Thursday Night | Light to occasionally moderate rain and snow becoming lighter showers overnight. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Wednesday | Cloudy with periods of light snow. |
| Wednesday Night | Cloudy with periods of light snow. Slight warming trend. |
| Thursday | Light to occasionally moderate rain and snow, heaviest Mt. Rainier area. Slow warming trend. |
| Thursday Night | Light to moderate rain and snow becoming lighter showers overnight. Warming trend. |
East Slopes of the Washington Cascades
| Wednesday | Cloudy with periods of light snow. |
| Wednesday Night | Cloudy with periods of light snow. |
| Thursday | Light rain and snow. Slow warming trend. |
| Thursday Night | Light to occasionally moderate rain and snow becoming lighter showers overnight. Warming trend. |
Mt. Hood
| Wednesday | Cloudy with periods of light rain and snow increasing in the afternoon. |
| Wednesday Night | Light rain and snow decreasing after midnight. |
| Thursday | Cloudy with periods of light rain and snow increasing in the afternoon. Warming trend. Increasing winds. |
| Thursday Night | Moderate to heavy rain and snow. Windy. Warmer. |
Issued: 7:43 AM PST Wednesday, December 27, 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 * | 1500' | 0' | 0' | ' | ' | 500' | ' | 5500' |
| Wednesday Afternoon | Snow Level * | 3000' | 1500' | 1500' | ' | ' | 2000' | ' | 5000' |
| Wednesday Night | Snow Level * | 4500' | 2500' | 1500' | ' | ' | 3000' | ' | 5000' |
| Thursday Morning | Snow Level * | 4500' | 3000' | 2500' | ' | ' | 3000' | ' | 5500' |
| Thursday Afternoon | Snow Level * | 5000' | 3500' | 3000' | ' | ' | 3500' | ' | 7000' |
| Thursday Night | Snow Level | 6000' | 4500' | 4000' | ' | ' | 5000' | ' | 7500' |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 4500' (Easterly Flow *) |
| Thursday Morning |
Snow Level 4500' (Easterly Flow *) |
| Thursday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 0' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Night |
Snow Level 2500' (Easterly Flow *) |
| Thursday Morning |
Snow Level 3000' (Easterly Flow *) |
| Thursday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Thursday Night |
Snow Level 4500' |
| Washington Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 0' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Night |
Snow Level 1500' (Easterly Flow *) |
| Thursday Morning |
Snow Level 2500' (Easterly Flow *) |
| Thursday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Thursday Night |
Snow Level 4000' |
| Leavenworth | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Thursday Morning |
Snow Level ' (Easterly Flow *) |
| Thursday Afternoon |
Snow Level ' (Easterly Flow *) |
| Thursday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Thursday Morning |
Snow Level ' (Easterly Flow *) |
| Thursday Afternoon |
Snow Level ' (Easterly Flow *) |
| Thursday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 2000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 3000' (Easterly Flow *) |
| Thursday Morning |
Snow Level 3000' (Easterly Flow *) |
| Thursday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Thursday Night |
Snow Level 5000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Thursday Morning |
Snow Level ' (Easterly Flow *) |
| Thursday Afternoon |
Snow Level ' (Easterly Flow *) |
| Thursday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 5500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 5000' (Easterly Flow *) |
| Thursday Morning |
Snow Level 5500' (Easterly Flow *) |
| Thursday Afternoon |
Snow Level 7000' (Easterly Flow *) |
| Thursday Night |
Snow Level 7500' |
* 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
| Thursday | Thursday | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | 0.25 - 0.50 |
| Mt Baker Ski Area | 0.25 - 0.50 | 0.75 - 1.00 |
| Washington Pass | LT 0.25 | 0 - 0.50 |
| Stevens Pass | LT 0.25 | 0 - 1.00 |
| Snoqualmie Pass | 0.25 - 0.50 | 1.00 - 1.50 |
| Mission Ridge | LT 0.10 | LT 0.25 |
| Crystal Mt | LT 0.10 | 0 - 0.50 |
| Paradise | LT 0.25 | 1.50 - 2.00 |
| White Pass | LT 0.10 | 1.00 - 1.50 |
| Mt Hood Meadows | 0 - 0.50 | 2.00 - 3.00 |
| Timberline | 0.50 - 0.75 | 2.50 - 3.50 |
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: 7:43 AM PST Wednesday, December 27, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Wednesday Morning | WSW 0 - 10 | SW 0 - 10 | WSW 5 - 15 | --- - | WSW 20 - 30 |
| Wednesday Afternoon | WSW 5 - 15 | WSW 0 - 10 | WSW 10 - 20 | --- - | WSW 20 - 30 |
| Wednesday Night | SW 5 - 15 | WSW 0 - 10 | SW 5 - 15 | --- - | WSW 10 - 20 |
| Thursday Morning | SW 10 - 20 | S 5 - 15 | SW 10 - 20 | --- - | SW 5 - 15 |
| Thursday Afternoon | S 15 - 30 | S 10 - 20 | S 10 - 20 | --- - | SW 15 - 25 |
| Thursday Night | SW 15 - 25 | S 10 - 20 | SW 25 - 35 | --- - | WSW 30 - 40 |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Morning | WSW 0 - 10 |
| Wednesday Afternoon | WSW 5 - 15 |
| Wednesday Night | SW 5 - 15 |
| Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | S 15 - 30 |
| Thursday Night | SW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning | SW 0 - 10 |
| Wednesday Afternoon | WSW 0 - 10 |
| Wednesday Night | WSW 0 - 10 |
| Thursday Morning | S 5 - 15 |
| Thursday Afternoon | S 10 - 20 |
| Thursday Night | S 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning | WSW 5 - 15 |
| Wednesday Afternoon | WSW 10 - 20 |
| Wednesday Night | SW 5 - 15 |
| Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | S 10 - 20 |
| Thursday Night | SW 25 - 35 |
| Mt. Rainier | Elevation |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning | WSW 20 - 30 |
| Wednesday Afternoon | WSW 20 - 30 |
| Wednesday Night | WSW 10 - 20 |
| Thursday Morning | SW 5 - 15 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | WSW 30 - 40 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Wednesday Morning | WSW 0 - 10 |
| Wednesday Afternoon | WSW 5 - 15 |
| Wednesday Night | SW 5 - 15 |
| Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | S 15 - 30 |
| Thursday Night | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Morning | SW 0 - 10 |
| Wednesday Afternoon | WSW 0 - 10 |
| Wednesday Night | WSW 0 - 10 |
| Thursday Morning | S 5 - 15 |
| Thursday Afternoon | S 10 - 20 |
| Thursday Night | S 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Morning | WSW 5 - 15 |
| Wednesday Afternoon | WSW 10 - 20 |
| Wednesday Night | SW 5 - 15 |
| Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | S 10 - 20 |
| Thursday Night | SW 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Morning | WSW 20 - 30 |
| Wednesday Afternoon | WSW 20 - 30 |
| Wednesday Night | WSW 10 - 20 |
| Thursday Morning | SW 5 - 15 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | WSW 30 - 40 |
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 | W 20 - 30 | W 20 - 30 | W 30 - 40 | --- - | WSW 35 - 45 |
| Wednesday Afternoon | W 30 - 40 | W 30 - 40 | W 30 - 40 | --- - | W 30 - 40 |
| Wednesday Night | W 20 - 30 | W 20 - 30 | WSW 25 - 35 | --- - | WSW 30 - 40 |
| Thursday Morning | SW 15 - 25 | SW 20 - 30 | SW 30 - 40 | --- - | SW 40 - 50 |
| Thursday Afternoon | SW 15 - 25 | SW 15 - 25 | SW 35 - 45 | --- - | WSW 50 - 60 |
| Thursday Night | SW 30 - 40 | SW 30 - 40 | WSW 40 - 50 | --- - | WSW 50 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | W 30 - 40 |
| Wednesday Night | W 20 - 30 |
| Thursday Morning | SW 15 - 25 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | SW 30 - 40 |
| Washington Pass | Direction - Speed |
|---|---|
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | W 30 - 40 |
| Wednesday Night | W 20 - 30 |
| Thursday Morning | SW 20 - 30 |
| Thursday Afternoon | SW 15 - 25 |
| Thursday Night | SW 30 - 40 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Morning | W 30 - 40 |
| Wednesday Afternoon | W 30 - 40 |
| Wednesday Night | WSW 25 - 35 |
| Thursday Morning | SW 30 - 40 |
| Thursday Afternoon | SW 35 - 45 |
| Thursday Night | WSW 40 - 50 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Morning | WSW 35 - 45 |
| Wednesday Afternoon | W 30 - 40 |
| Wednesday Night | WSW 30 - 40 |
| Thursday Morning | SW 40 - 50 |
| Thursday Afternoon | WSW 50 - 60 |
| Thursday Night | WSW 50 - 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 Dec 26, 2017
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