Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Sunday & Friday
A Pacific frontal system should bring a light to moderate amount of precipitation to the PNW mountains today. This front will be the first of a series of weather disturbances spinning from the parent upper level low well offshore out at 155W/45N over the next several days.
After the front passes through the Cascades in late afternoon... a switch to westerly winds should temporarily bump up snow levels for Snoqualmie Pass. Showers should diminish overnight.
Another developing system approaching the area on Monday, with most of it's energy and moisture directed into Oregon. This system should also bring a shot of warmer air that affects mainly the central Cascades Passes and south in the late afternoon after the frontal passage. This system should move through quickly with showers again tapering down Monday night.
Weather Forecast
North Washington Cascades near and west of the crest including Stevens Pass
| Sunday Afternoon |
Light to moderate rain and snow. Slight warming trend in the afternoon. |
| Sunday Night - Monday Morning |
Light rain and snow showers ending overnight and becoming mostly cloudy. |
| Monday Afternoon - Monday Evening |
Light rain and snow developing mid-day, occasionally moderate Stevens Pass. Slight warming trend Monday afternoon. |
| Monday Night |
Mostly cloudy with scattered snow showers. |
South and Central Washington Cascades near and west of the crest including Snoqualmie, and White Passes and Olypmics
| Sunday Afternoon |
Light to moderate rain and snow. Warming trend in the afternoon. |
| Sunday Night - Monday Morning |
Light rain and snow showers ending overnight and becoming mostly cloudy. |
| Monday Afternoon - Monday Evening |
Light rain and snow developing mid-day and becoming moderate south Washington Cascades. Warming trend Monday afternoon. Snow potentially mixing with freezing rain Snoqualmie Pass Monday afternoon before changing to rain in the late afternoon. |
| Monday Night |
Mostly cloudy with scattered rain and snow showers. |
East slopes of the Washington Cascades
| Sunday Afternoon |
Light rain and snow. Slight warming trend in the afternoon. |
| Sunday Night - Monday Morning |
Scattered rain and snow showers ending overnight and becoming mostly cloudy. |
| Monday Afternoon - Monday Evening |
Light rain and snow developing mid-day, occasionally moderate near the crest central and southeast Cascades. Slight warming trend Monday afternoon. |
| Monday Night |
Mostly cloudy with scattered snow showers. |
Mt. Hood Area
| Sunday Afternoon |
Light to moderate rain and snow. Warming trend in the afternoon. |
| Sunday Night |
Light rain and snow showers tapering down overnight and becoming mostly cloudy. |
| Monday |
Light rain and snow developing in the morning and becoming moderate to occasionally heavy mid-day. Warming trend mid-day Monday. |
| Monday Night |
Mostly cloudy with scattered rain and snow showers. |
Issued: 1:23 PM PST Sunday, February 1, 2015
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Mid-day | Snow Level * | 5500' | 4000' | 3000' | ' | ' | 4000' | ' | 5500' |
| Sunday Afternoon | Snow Level | 5000' | 4000' | 4000' | ' | ' | 5000' | ' | 6500' |
| Sunday Night - Morning | Snow Level | 4000' | 3500' | 3000' | ' | ' | 4000' | ' | 5000' |
| Monday Mid-day | Snow Level * | 4500' | 3000' | 3000' | ' | ' | 3500' | ' | 7000' |
| Monday Afternoon | Snow Level * | 5000' | 4000' | 3500' | ' | ' | 5500' | ' | 6000' |
| Monday Night | Snow Level | 4000' | 3500' | 3500' | ' | ' | 4000' | ' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Mid-day |
Snow Level 5500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Night - Morning |
Snow Level 4000' |
| Monday Mid-day |
Snow Level 4500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Monday Night |
Snow Level 4000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Mid-day |
Snow Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 4000' |
| Sunday Night - Morning |
Snow Level 3500' |
| Monday Mid-day |
Snow Level 3000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Monday Night |
Snow Level 3500' |
| Washington Pass | Elevation |
|---|---|
| Sunday Mid-day |
Snow Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 4000' |
| Sunday Night - Morning |
Snow Level 3000' |
| Monday Mid-day |
Snow Level 3000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Monday Night |
Snow Level 3500' |
| Leavenworth | Elevation |
|---|---|
| Sunday Mid-day |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night - Morning |
Snow Level ' |
| Monday Mid-day |
Snow Level ' (Easterly Flow *) |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Mid-day |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night - Morning |
Snow Level ' |
| Monday Mid-day |
Snow Level ' (Easterly Flow *) |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Mid-day |
Snow Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Night - Morning |
Snow Level 4000' |
| Monday Mid-day |
Snow Level 3500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Monday Night |
Snow Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Mid-day |
Snow Level ' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night - Morning |
Snow Level ' |
| Monday Mid-day |
Snow Level ' (Easterly Flow *) |
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Mid-day |
Snow Level 5500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 6500' |
| Sunday Night - Morning |
Snow Level 5000' |
| Monday Mid-day |
Snow Level 7000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 6000' (Easterly Flow *) |
| Monday Night |
Snow Level 4500' |
* 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 | LT 0.10 |
| Mt Baker Ski Area | 0.50 - 0.75 | LT 0.25 |
| Washington Pass | LT 0.25 | LT 0.25 |
| Stevens Pass | 0 - 0.50 | 0.25 - 0.50 |
| Snoqualmie Pass | 0 - 0.50 | 0.25 - 0.50 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.25 | LT 0.25 |
| Paradise | 0.50 - 0.75 | 0.50 - 0.75 |
| White Pass | 0.25 - 0.50 | 0.25 - 0.50 |
| Mt Hood Meadows | 0.75 - 1.00 | 0 - 1.00 |
| Timberline | 0 - 1.00 | 1.00 - 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: 1:23 PM PST Sunday, February 1, 2015
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Afternoon | WSW 15 - 25 | SW 20 - 30 | SW 15 - 30 | --- - | WSW 20 - 30 |
| Sunday Night - Monday Morning | SW 5 - 15 | S 5 - 15 | SW 5 - 15 | --- - | SW 10 - 20 |
| Monday Afternoon | SW 5 - 15 | SW 5 - 15 | SW 20 - 30 | --- - | WSW 25 - 35 |
| Monday Night | W 5 - 15 | SW 10 - 20 | W 10 - 20 | --- - | W 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night - Monday Morning | SW 5 - 15 |
| Monday Afternoon | SW 5 - 15 |
| Monday Night | W 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night - Monday Morning | S 5 - 15 |
| Monday Afternoon | SW 5 - 15 |
| Monday Night | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Afternoon | SW 15 - 30 |
| Sunday Night - Monday Morning | SW 5 - 15 |
| Monday Afternoon | SW 20 - 30 |
| Monday Night | W 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Afternoon | WSW 20 - 30 |
| Sunday Night - Monday Morning | SW 10 - 20 |
| Monday Afternoon | WSW 25 - 35 |
| Monday Night | W 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night - Monday Morning | SW 5 - 15 |
| Monday Afternoon | SW 5 - 15 |
| Monday Night | W 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night - Monday Morning | S 5 - 15 |
| Monday Afternoon | SW 5 - 15 |
| Monday Night | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 15 - 30 |
| Sunday Night - Monday Morning | SW 5 - 15 |
| Monday Afternoon | SW 20 - 30 |
| Monday Night | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 20 - 30 |
| Sunday Night - Monday Morning | SW 10 - 20 |
| Monday Afternoon | WSW 25 - 35 |
| Monday Night | W 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Afternoon | WSW 30 - 40 | W 35 - 45 | WSW 35 - 45 | --- - | W 35 - 45 |
| Sunday Night - Monday Morning | W 20 - 30 | WNW 20 - 30 | W 25 - 35 | --- - | W 30 - 40 |
| Monday Afternoon | W 30 - 40 | W 30 - 40 | WSW 40 - 50 | --- - | W 50 - 60 |
| Monday Night | W 15 - 25 | WNW 30 - 40 | NW 25 - 35 | --- - | W 30 - 40 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 30 - 40 |
| Sunday Night - Monday Morning | W 20 - 30 |
| Monday Afternoon | W 30 - 40 |
| Monday Night | W 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | W 35 - 45 |
| Sunday Night - Monday Morning | WNW 20 - 30 |
| Monday Afternoon | W 30 - 40 |
| Monday Night | WNW 30 - 40 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 35 - 45 |
| Sunday Night - Monday Morning | W 25 - 35 |
| Monday Afternoon | WSW 40 - 50 |
| Monday Night | NW 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night - Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Afternoon | W 35 - 45 |
| Sunday Night - Monday Morning | W 30 - 40 |
| Monday Afternoon | W 50 - 60 |
| Monday Night | W 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.
Issued: 1:23 PM PST Sunday, February 1, 2015
Extended Weather Synopsis for Friday night through Friday
Yet another developing frontal wave extending from the upper low well offshore should approach the area on Tuesday. This system looks rather weak and should mainly affect the Mt. Hood area with some light to occasionally moderate precipitation and light showers elsewhere.
Upper level ridging should build along the west coast on Wednesday for at least some partial clearing. A stronger system will develop in SW flow aloft for Thursday and spread over the area. This pattern will likely stick around through the weekend bringing bouts of mild and wet weather.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Periods of light rain and snow, heaviest south Washington Cascades and Mt. Hood area.
Mostly cloudy with isolated rain and snow showers.
Partly sunny Wednesday with increasing high clouds in the afternoon. Becoming cloudy overnight.
Periods of light to occasionally moderate rain and snow. Warming trend.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday - Tuesday Night | Snow Level | 3000' - 4000' | 3500' - 4500' | 4000' - 5000' | |
| Wednesday - Wednesday Night | Freezing Level | 4000' - 5000' | 5000' - 6000' | 6500' - 7500' | |
| Thursday | Snow Level | 4500' - 6000' | 5500' - 7000' | 7000' - 8000' | * |
| Mt. Baker | Elevation |
|---|---|
| Tuesday - Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday - Wednesday Night |
Freezing Level 4000' - 5000' |
| Thursday |
Snow Level 4500' - 6000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday - Tuesday Night |
Snow Level 3500' - 4500' |
| Wednesday - Wednesday Night |
Freezing Level 5000' - 6000' |
| Thursday |
Snow Level 5500' - 7000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Tuesday - Tuesday Night |
Snow Level 4000' - 5000' |
| Wednesday - Wednesday Night |
Freezing Level 6500' - 7500' |
| Thursday |
Snow Level 7000' - 8000' (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.
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 1, 2015
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