Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Monday & Saturday
Moderate shower activity in NW flow aloft will continue through this afternoon as a weak upper level disturbance sliding down the backside of the upper trough. A convergence zone downwind of Vancouver Island and aimed between Stevens and Snoquamlie should slide further south this evening before showers throughout the west slopes taper off overnight. In this pattern cloud cover quickly decreases east of the Cascade crest.
Tuesday should be a quiet day between systems with high clouds from the next frontal system moving overhead in the afternoon. The front should pass through Tuesday night with a quick transition to showers and a light shot of precipitation.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday Afternoon - Monday Night |
Cloudy with light rain and snow showers, except occasionally moderate in the convergence zone. The convergence zone should slide south from between Stevens and Snoqualmie Passes down toward Mt. Rainier this evening before weakening with showers tapering down throughout the west slopes overnight. |
| Tuesday |
Partly to mostly cloudy in the morning. Increasing high level clouds in the afternoon. Slight chance of rain or snow Mt. Baker area Tuesday afternoon. |
| Tuesday Night |
Light rain and snow developing overnight and turning to showers after midnight. |
Olympics
| Monday Afternoon - Monday Night |
Mostly cloudy with light rain and snow showers. Showers tapering down overnight. |
| Tuesday |
Partly to mostly cloudy in the morning. Increasing high level clouds with a slight chance of rain or snow Tuesday afternoon. |
| Tuesday Night |
Light rain and snow turning to showers after midnight. |
East slopes of the Washington Cascades
| Monday Afternoon - Monday Night |
Mostly cloudy with light rain and snow showers near the crest. Partly sunny further east. |
| Tuesday |
Partly cloudy in the morning with patchy valley fog. Increasing high level clouds in the afternoon. |
| Tuesday Night |
Light rain and snow developing overnight and turning to showers after midnight. |
Mt. Hood Area
| Monday Afternoon - Monday Night |
Cloudy with light to moderate rain and snow showers. Showers tapering down overnight. |
| Tuesday |
Partly to mostly cloudy in the morning. Increasing high level clouds in the afternoon. |
| Tuesday Night |
Light rain and snow developing overnight and turning to showers after midnight. |
Issued: 1:55 PM PST Monday, November 28, 2016
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Afternoon - Monday Evening | Snow Level | 4000' | 3000' | 3000' | ' | ' | 3500' | ' | 4000' |
| Monday Night - Tuesday Morning | Freezing Level | 3500' | 1500' | 1000' | ' | ' | 2000' | ' | 3500' |
| Tuesday Afternoon | Freezing Level | 5000' | 3500' | 3000' | ' | ' | 3500' | ' | 5000' |
| Tuesday Night | Snow Level * | 3500' | 3000' | 2500' | ' | ' | 3000' | ' | 4000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon - Monday Evening |
Snow Level 4000' |
| Monday Night - Tuesday Morning |
Freezing Level 3500' |
| Tuesday Afternoon |
Freezing Level 5000' |
| Tuesday Night |
Snow Level 3500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon - Monday Evening |
Snow Level 3000' |
| Monday Night - Tuesday Morning |
Freezing Level 1500' |
| Tuesday Afternoon |
Freezing Level 3500' |
| Tuesday Night |
Snow Level 3000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Afternoon - Monday Evening |
Snow Level 3000' |
| Monday Night - Tuesday Morning |
Freezing Level 1000' |
| Tuesday Afternoon |
Freezing Level 3000' |
| Tuesday Night |
Snow Level 2500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Afternoon - Monday Evening |
Snow Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Afternoon - Monday Evening |
Snow Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon - Monday Evening |
Snow Level 3500' |
| Monday Night - Tuesday Morning |
Freezing Level 2000' |
| Tuesday Afternoon |
Freezing Level 3500' |
| Tuesday Night |
Snow Level 3000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Afternoon - Monday Evening |
Snow Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon - Monday Evening |
Snow Level 4000' |
| Monday Night - Tuesday Morning |
Freezing Level 3500' |
| Tuesday Afternoon |
Freezing Level 5000' |
| Tuesday Night |
Snow Level 4000' (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
| Saturday | Saturday | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | 0.25 - 0.50 |
| Mt Baker Ski Area | LT 0.25 | 0 - 0.50 |
| Washington Pass | LT 0.10 | LT 0.25 |
| Stevens Pass | 0 - 0.50 | LT 0.25 |
| 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 - 0.75 | 0 - 0.50 |
| White Pass | LT 0.25 | LT 0.25 |
| Mt Hood Meadows | 0 - 1.00 | 0.25 - 0.50 |
| Timberline | 0 - 1.00 | 0 - 0.50 |
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: 1:55 PM PST Monday, November 28, 2016
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Afternoon | NW 10 - 20 | WNW 5 - 15 | NW 15 - 30 | --- - | WNW 15 - 30 |
| Monday Night - Tuesday Morning | W 5 - 15 | SW 0 - 10 | W 0 - 10 | --- - | WNW 10 - 20 |
| Tuesday Afternoon | SSW 10 - 20 | S 5 - 15 | S 0 - 10 | --- - | SW 0 - 10 |
| Tuesday Night | S 15 - 25 | S 15 - 25 | SE 10 - 20 | --- - | SW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon | NW 10 - 20 |
| Monday Night - Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | SSW 10 - 20 |
| Tuesday Night | S 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon | WNW 5 - 15 |
| Monday Night - Tuesday Morning | SW 0 - 10 |
| Tuesday Afternoon | S 5 - 15 |
| Tuesday Night | S 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon | NW 15 - 30 |
| Monday Night - Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | S 0 - 10 |
| Tuesday Night | SE 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon | WNW 15 - 30 |
| Monday Night - Tuesday Morning | WNW 10 - 20 |
| Tuesday Afternoon | SW 0 - 10 |
| Tuesday Night | SW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Afternoon | NW 10 - 20 |
| Monday Night - Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | SSW 10 - 20 |
| Tuesday Night | S 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon | WNW 5 - 15 |
| Monday Night - Tuesday Morning | SW 0 - 10 |
| Tuesday Afternoon | S 5 - 15 |
| Tuesday Night | S 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon | NW 15 - 30 |
| Monday Night - Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | S 0 - 10 |
| Tuesday Night | SE 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon | WNW 15 - 30 |
| Monday Night - Tuesday Morning | WNW 10 - 20 |
| Tuesday Afternoon | SW 0 - 10 |
| Tuesday Night | SW 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 | |
|---|---|---|---|---|---|
| Monday Afternoon | NW 10 - 20 | NW 15 - 25 | NW 30 - 40 | --- - | NW 30 - 40 |
| Monday Night | NW 10 - 20 | NW 5 - 15 | NNW 20 - 30 | --- - | NNW 20 - 30 |
| Tuesday | SW 10 - 20 | WSW 5 - 15 | WSW 15 - 25 | --- - | W 15 - 25 |
| Tuesday Night | SW 25 - 35 | SW 20 - 30 | SW 25 - 35 | --- - | WSW 35 - 45 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon | NW 10 - 20 |
| Monday Night | NW 10 - 20 |
| Tuesday | SW 10 - 20 |
| Tuesday Night | SW 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Afternoon | NW 15 - 25 |
| Monday Night | NW 5 - 15 |
| Tuesday | WSW 5 - 15 |
| Tuesday Night | SW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon | NW 30 - 40 |
| Monday Night | NNW 20 - 30 |
| Tuesday | WSW 15 - 25 |
| Tuesday Night | SW 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon | NW 30 - 40 |
| Monday Night | NNW 20 - 30 |
| Tuesday | W 15 - 25 |
| Tuesday Night | WSW 35 - 45 |
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: 1:55 PM PST Monday, November 28, 2016
Extended Weather Synopsis for Saturday night through Saturday
Showers will stick around for much of Wednesday with NW flow aloft returning and another chance for a convergence zone to locally enhance accumulations along the west slopes.
Ridging centered well offshore will begin to flatten and flop over the PNW as the next system approaches. For now Thursday looks like a mostly dry day but a few stray showers are possible.
Warm frontal precipitation will spread over the area from the NW as the ridge becomes flattened. A decent rise in snow levels may accompany the precipitation on Friday.
Extended Weather
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
Mostly cloudy along the west slopes of the Cascades and Olympics with light to moderate rain and snow showers. Shower activity and cloud cover decreasing east of the Cascade crest.
Mostly cloudy with isolated showers decreasing overnight.
Partly to mostly cloudy.
Rain and snow developing early Friday and spreading south. Warming trend during the day.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Afternoon - Thursday Evening | Snow Level | 2000' - 3000' | 2000' - 3000' | 2500' - 3500' | |
| Wednesday Morning | Snow Level | 2500' - 3500' | 2500' - 3500' | 3500' - 4500' | |
| Thursday Night - Friday | Snow Level | 3500' - 4500' | 3500' - 4500' | 4000' - 5000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Afternoon - Thursday Evening |
Snow Level 2000' - 3000' |
| Wednesday Morning |
Snow Level 2500' - 3500' |
| Thursday Night - Friday |
Snow Level 3500' - 4500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Afternoon - Thursday Evening |
Snow Level 2000' - 3000' |
| Wednesday Morning |
Snow Level 2500' - 3500' |
| Thursday Night - Friday |
Snow Level 3500' - 4500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Afternoon - Thursday Evening |
Snow Level 2500' - 3500' |
| Wednesday Morning |
Snow Level 3500' - 4500' |
| Thursday Night - Friday |
Snow Level 4000' - 5000' |
* 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 Nov 25, 2016
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