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 & Friday
A weak and splitting frontal system should dive into northern California today while the PNW remains in NW flow aloft. The air mass over us will be weakly unstable and should allow for some isolated shower activity in the afternoon. The sunniest skies should be seen down over the south Washington Cascades and extend to Mt. Hood.
A frontal system well offshore should reach the area on Wednesday, with light rain and snow developing over the Olympics in the morning and spreading inland during the afternoon. This system will once again have a N-S orientation and begin to split (weaken) as it passes inland. The heaviest precipitation looks to be in the late afternoon and evening and associated with the frontal passage. A trailing longwave trough will pass through the Cascades late Wednesday night to prolong the shower activity. Precipitation amounts look modest with this system. Snow levels should not dramatically change over the short term although the Passes may see subtle warming late Wednesday night with a switch to west winds.
Weather Forecast
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Tuesday |
Mostly sunny south Washington Cascades. Partly cloudy central and north Cascades with a slight chance of light rain and snow showers this afternoon. |
| Tuesday Night |
Mostly cloudy with periods of light rain and snow. |
| Wednesday |
Light rain and snow developing in the morning, becoming light to moderate by late afternoon. |
| Wednesday Night |
Moderate rain and snow showers, becoming light to moderate snow showers late Wednesday night. |
East slopes of the Washington Cascades
| Tuesday |
Mostly sunny southeast Cascades and partly to mostly cloudy central and northeast Cascades. Slight chance of light rain and snow showers near the Cascade crest this afternoon. |
| Tuesday Night |
Partly cloudy. |
| Wednesday |
Light rain and snow developing late morning. |
| Wednesday Night |
Light to moderate rain and snow showers. |
Mt. Hood Area
| Tuesday |
Mostly sunny. |
| Tuesday Night |
Becoming mostly cloudy with periods of light rain and snow. |
| Wednesday |
Light rain and snow in the morning, becoming light to moderate in the afternoon. |
| Wednesday Night |
Windy. Moderate rain and snow showers. |
Issued: 1:40 PM PST Tuesday, February 2, 2016
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Tuesday Afternoon | Snow Level * | 3500' | 3500' | 2500' | ' | ' | 3000' | ' | 4500' |
| Tuesday Night - Wednesday Morning | Snow Level * | 2500' | 2500' | 0' | ' | ' | 1500' | ' | 2500' |
| Wednesday Afternoon - Wednesday Night | Snow Level * | 3500' | 3500' | 2000' | ' | ' | 2500' | ' | 3500' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Snow Level 2500' (Easterly Flow *) |
| Wednesday Afternoon - Wednesday Night |
Snow Level 3500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Snow Level 2500' (Easterly Flow *) |
| Wednesday Afternoon - Wednesday Night |
Snow Level 3500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Snow Level 0' (Easterly Flow *) |
| Wednesday Afternoon - Wednesday Night |
Snow Level 2000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon - Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon - Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Afternoon - Wednesday Night |
Snow Level 2500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon - Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Tuesday Night - Wednesday Morning |
Snow Level 2500' (Easterly Flow *) |
| Wednesday Afternoon - Wednesday Night |
Snow Level 3500' (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
| Friday | Friday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | 0 - 0.50 |
| Mt Baker Ski Area | LT 0.10 | 0.75 - 1.00 |
| Washington Pass | LT 0.10 | 0.25 - 0.50 |
| Stevens Pass | LT 0.10 | 0 - 0.75 |
| Snoqualmie Pass | LT 0.10 | 0.75 - 1.00 |
| Mission Ridge | LT 0.10 | 0.25 - 0.50 |
| Crystal Mt | LT 0.10 | 0 - 0.75 |
| Paradise | LT 0.10 | 1.00 - 1.50 |
| White Pass | LT 0.10 | 0.50 - 0.75 |
| Mt Hood Meadows | LT 0.25 | 1.00 - 1.50 |
| Timberline | LT 0.25 | 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: 1:40 PM PST Tuesday, February 2, 2016
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Afternoon - Tuesday Night | S 0 - 10 | S 0 - 10 | SSE 0 - 10 | --- - | SW 5 - 15 |
| Wednesday Morning | S 10 - 20 | SE 5 - 15 | SSE 5 - 15 | --- - | S 5 - 15 |
| Wednesday Afternoon | SW 20 - 30 | SE 10 - 20 | SSE 15 - 30 | --- - | SW 15 - 25 |
| Wednesday Night | SW 15 - 25 | SW 15 - 25 | SW 15 - 30 | --- - | WSW 30 - 40 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Afternoon - Tuesday Night | S 0 - 10 |
| Wednesday Morning | S 10 - 20 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Afternoon - Tuesday Night | S 0 - 10 |
| Wednesday Morning | SE 5 - 15 |
| Wednesday Afternoon | SE 10 - 20 |
| Wednesday Night | SW 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Afternoon - Tuesday Night | SSE 0 - 10 |
| Wednesday Morning | SSE 5 - 15 |
| Wednesday Afternoon | SSE 15 - 30 |
| Wednesday Night | SW 15 - 30 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Afternoon - Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Afternoon - Tuesday Night | SW 5 - 15 |
| Wednesday Morning | S 5 - 15 |
| Wednesday Afternoon | SW 15 - 25 |
| Wednesday Night | WSW 30 - 40 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | S 0 - 10 |
| Wednesday Morning | S 10 - 20 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | S 0 - 10 |
| Wednesday Morning | SE 5 - 15 |
| Wednesday Afternoon | SE 10 - 20 |
| Wednesday Night | SW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | SSE 0 - 10 |
| Wednesday Morning | SSE 5 - 15 |
| Wednesday Afternoon | SSE 15 - 30 |
| Wednesday Night | SW 15 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | SW 5 - 15 |
| Wednesday Morning | S 5 - 15 |
| Wednesday Afternoon | SW 15 - 25 |
| Wednesday 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 | |
|---|---|---|---|---|---|
| Tuesday Afternoon - Tuesday Night | SW 0 - 10 | W 0 - 10 | WSW 10 - 20 | --- - | W 10 - 20 |
| Wednesday Morning | SW 10 - 20 | SW 10 - 20 | SW 10 - 20 | --- - | SW 10 - 20 |
| Wednesday Afternoon - Wednesday Night | SW 30 - 40 | SW 20 - 30 | SW 35 - 45 | --- - | WSW 40 - 50 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | SW 0 - 10 |
| Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon - Wednesday Night | SW 30 - 40 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | W 0 - 10 |
| Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon - Wednesday Night | SW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | WSW 10 - 20 |
| Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon - Wednesday Night | SW 35 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon - Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Afternoon - Tuesday Night | W 10 - 20 |
| Wednesday Morning | SW 10 - 20 |
| Wednesday Afternoon - Wednesday Night | WSW 40 - 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.
Issued: 1:40 PM PST Tuesday, February 2, 2016
Extended Weather Synopsis for Friday night through Friday
Leftover showers should diminish on Thursday, but skies should remain mostly cloudy as incoming high clouds from a warm front lifting well north brushes the area with light rain and snow. Periods of light rain and snow will continue Thursday night as the main moisture associated with the warm front lifts into British Columbia. There should be a gradual warming trend Thursday night and Friday.
Forecast models have been inconsistent with the timing of a stronger frontal system currently forecast to impact the area Friday afternoon and evening and then quickly turn to showers Friday night. Saturday looks to be a breezy day, but one with post-frontal showers quickly decreasing and a partial clearing trend possible by Saturday afternoon.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Mostly cloudy with light to occasionally moderate rain and snow showers.
Mostly cloudy with periods of very light rain and snow. Slight warming trend.
Becoming stormy with moderate to occasionally heavy rain and snow. Warming trend.
Breezy. Light to moderate rain and snow showers decreasing Saturday afternoon with a partial clearing trend. Cooler.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Thursday | Snow Level | 2500' - 3500' | 2500' - 3500' | 3500' - 4500' | |
| Thursday Night - Friday Morning | Snow Level | 2500' - 3500' | 3500' - 4500' | 4000' - 5000' | * |
| Friday Afternoon - Friday Evening | Snow Level | 4000' - 5000' | 4500' - 6000' | 6000' - 7000' | * |
| Friday Night - Saturday Morning | Snow Level | 2000' - 3000' | 2000' - 3000' | 3500' - 4500' | |
| Saturday Afternoon | Snow Level | 3000' - 4000' | 3000' - 4000' | 4500' - 5500' |
| Mt. Baker | Elevation |
|---|---|
| Thursday |
Snow Level 2500' - 3500' |
| Thursday Night - Friday Morning |
Snow Level 2500' - 3500' (Easterly Flow *) |
| Friday Afternoon - Friday Evening |
Snow Level 4000' - 5000' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Snow Level 2000' - 3000' |
| Saturday Afternoon |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday |
Snow Level 2500' - 3500' |
| Thursday Night - Friday Morning |
Snow Level 3500' - 4500' (Easterly Flow *) |
| Friday Afternoon - Friday Evening |
Snow Level 4500' - 6000' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Snow Level 2000' - 3000' |
| Saturday Afternoon |
Snow Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Thursday |
Snow Level 3500' - 4500' |
| Thursday Night - Friday Morning |
Snow Level 4000' - 5000' (Easterly Flow *) |
| Friday Afternoon - Friday Evening |
Snow Level 6000' - 7000' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Snow Level 3500' - 4500' |
| Saturday Afternoon |
Snow 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 2, 2016
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