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 & Tuesday
PM Update: Increased some Day 1 and Day 2 precipitation forecasts as well as other minor changes.
High clouds are increasing this afternoon as a warm front approaches from the west. Clouds will lower overnight and warm frontal moisture will spread inland from the southeast. A slow warming trend will begin Monday night and continue on Tuesday. Cool easterly flow through the Passes will keep snow levels locally lower during the daylight hours. Freezing rain may mix in locally mainly at Snoqualmie Pass Tuesday afternoon. Precipitation should be ease off for the south and central Cascades mid-day as warm frontal moisture lifts northward, but quickly fill-in again as the cold front approaches Tuesday afternoon. Precipitation rates will locally stay heavy in the Mt. Baker area. The east slopes won't be shadowed until Tuesday night and should also see decent precipitation amounts with slowly rising snow levels.
The cold front associated with the system will pass through early evening with a switch to westerly winds in the Passes by later Tuesday evening. A modest warm-up with the switch to westerly may push rain above pass level at Stevens early Wednesday evening. A slow cooling trend will ensue Tuesday night. A sharp trough moving through area Tuesday night along with strong surface pressure rises should make for blustery post-frontal showers.
Weather Forecast
Olympics
| Monday Afternoon - Monday Evening |
Cloudy, bases lowering. |
| Monday Night - Tuesday |
Light to moderate rain and snow. Slow warming trend. Winds increasing Tuesday morning. |
| Tuesday Night |
Light to moderate rain and snow showers. Slow cooling trend. Gusty winds. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday Afternoon - Monday Evening |
Cloudy with a slight chance of afternoon showers. |
| Monday Night |
Light to moderate rain and snow developing over the southern Cascades and lifting north. |
| Tuesday Afternoon |
Cloudy with periods of light rain and snow south and central Cascades mid-day increasing to moderate in the afternoon. Possible freezing rain at mainly Snoqualmie Pass Tuesday afternoon. Moderate to heavy rain and snow Mt. Baker area. Warming trend. Strong alpine winds. |
| Tuesday Night |
Light to moderate rain and snow showers. Slow cooling trend. Gusty winds. |
| Tuesday Morning |
Moderate rain and snow, heaviest volcanoes. Warming trend away from the Cascade Passes. |
East slopes of the Washington Cascades
| Monday Afternoon - Monday Evening |
Increasing high clouds. |
| Monday Night - Tuesday Morning |
Light to occasionally moderate rain and snow developing overnight. |
| Tuesday Afternoon |
Cloudy with periods of light rain and snow southeast and central-east Cascades mid-day, become light to moderate in the afternoon. Briefly mixing with freezing rain possible valleys and near the Passes. Light to moderate snow northeast Cascades. Slow warming trend. |
| Tuesday Night |
Light to occasionally moderate rain and snow showers, heaviest near the Cascade crest. Slow cooling trend overnight. Gusty winds. |
Mt. Hood Area
| Monday |
Partly to mostly cloudy with increasing high clouds in the afternoon. |
| Monday Night |
Moderate rain and snow developing overnight. Warming trend. |
| Tuesday |
Cloudy with periods of light rain and snow increasing to light to moderate rain and snow in the afternoon. Warmer. Strong alpine winds. |
| Tuesday Night |
Light to moderate rain and snow showers. Slow cooling trend. Gusty winds. |
Issued: 1:38 PM PST Monday, February 29, 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 | Snow Level * | 4000' | 3500' | 3500' | ' | ' | 4000' | ' | 5500' |
| Monday Night | Snow Level * | 4500' | 3000' | 3000' | ' | ' | 3000' | ' | 6000' |
| Tuesday Morning | Snow Level * | 6500' | 3500' | 3000' | ' | ' | 4500' | ' | 7000' |
| Tuesday Afternoon | Snow Level * | 6500' | 5500' | 5000' | ' | ' | 6000' | ' | 6500' |
| Tuesday Night | Snow Level | 4000' | 3500' | 3500' | ' | ' | 3500' | ' | 4000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Monday Night |
Snow Level 4500' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 6500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 6500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 4000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Monday Night |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 3500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3500' |
| Washington Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Monday Night |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3500' |
| Leavenworth | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Monday Night |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 4500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 6000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' (Easterly Flow *) |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Monday Night |
Snow Level 6000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 7000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 6500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 4000' |
* 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
| Tuesday | Tuesday | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | 1.00 - 1.50 |
| Mt Baker Ski Area | LT 0.25 | 3.00 - 4.00 |
| Washington Pass | LT 0.10 | 1.00 - 1.50 |
| Stevens Pass | LT 0.25 | 0 - 1.00 |
| Snoqualmie Pass | 0.25 - 0.50 | 1.50 - 2.00 |
| Mission Ridge | LT 0.10 | 0 - 0.75 |
| Crystal Mt | 0 - 0.50 | 1.50 - 2.00 |
| Paradise | 0.75 - 1.00 | 2.00 - 3.00 |
| White Pass | 0.25 - 0.50 | 0.75 - 1.00 |
| Mt Hood Meadows | 0.75 - 1.00 | 0 - 1.00 |
| Timberline | 0 - 1.00 | 0 - 1.00 |
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: 1:38 PM PST Monday, February 29, 2016
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Afternoon - Monday Evening | SE 5 - 15 | S 5 - 15 | SE 5 - 15 | --- - | S 5 - 15 |
| Monday Night - Tuesday Morning | S 20 - 30 | SE 10 - 20 | SE 15 - 25 | --- - | SW 15 - 25 |
| Tuesday Mid-day - Tuesday Afternoon | SW 25 - 40 | SSE 25 - 40 | SSE 20 - 35 | --- - | SSW 20 - 35 |
| Tuesday Night | SW 25 - 35 | SSW 20 - 30 | SW 30 - 50 | --- - | SW 30 - 50 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon - Monday Evening | SE 5 - 15 |
| Monday Night - Tuesday Morning | S 20 - 30 |
| Tuesday Mid-day - Tuesday Afternoon | SW 25 - 40 |
| Tuesday Night | SW 25 - 35 |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon - Monday Evening | S 5 - 15 |
| Monday Night - Tuesday Morning | SE 10 - 20 |
| Tuesday Mid-day - Tuesday Afternoon | SSE 25 - 40 |
| Tuesday Night | SSW 20 - 30 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon - Monday Evening | SE 5 - 15 |
| Monday Night - Tuesday Morning | SE 15 - 25 |
| Tuesday Mid-day - Tuesday Afternoon | SSE 20 - 35 |
| Tuesday Night | SW 30 - 50 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Afternoon - Monday Evening | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Mid-day - Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon - Monday Evening | S 5 - 15 |
| Monday Night - Tuesday Morning | SW 15 - 25 |
| Tuesday Mid-day - Tuesday Afternoon | SSW 20 - 35 |
| Tuesday Night | SW 30 - 50 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Evening | SE 5 - 15 |
| Monday Night - Tuesday Morning | S 20 - 30 |
| Tuesday Mid-day - Tuesday Afternoon | SW 25 - 40 |
| Tuesday Night | SW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Evening | S 5 - 15 |
| Monday Night - Tuesday Morning | SE 10 - 20 |
| Tuesday Mid-day - Tuesday Afternoon | SSE 25 - 40 |
| Tuesday Night | SSW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Evening | SE 5 - 15 |
| Monday Night - Tuesday Morning | SE 15 - 25 |
| Tuesday Mid-day - Tuesday Afternoon | SSE 20 - 35 |
| Tuesday Night | SW 30 - 50 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Evening | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Mid-day - Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Evening | S 5 - 15 |
| Monday Night - Tuesday Morning | SW 15 - 25 |
| Tuesday Mid-day - Tuesday Afternoon | SSW 20 - 35 |
| Tuesday Night | SW 30 - 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Afternoon | SW 5 - 15 | SW 0 - 10 | WSW 10 - 20 | --- - | SW 10 - 20 |
| Monday Night | S 20 - 30 | SSW 15 - 25 | SW 25 - 40 | --- - | SW 30 - 40 |
| Tuesday Morning | SW 50 - 60 | SW 40 - 50 | SW 50 - 60 | --- - | SW 50 - 60 |
| Tuesday Afternoon | SW 50 - 60 | SW 35 - 45 | SW 60 - 80 | --- - | SW 60 - 80 |
| Tuesday Night | WSW 25 - 35 | WSW 35 - 45 | W 35 - 50 | --- - | W 50 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon | SW 5 - 15 |
| Monday Night | S 20 - 30 |
| Tuesday Morning | SW 50 - 60 |
| Tuesday Afternoon | SW 50 - 60 |
| Tuesday Night | WSW 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Afternoon | SW 0 - 10 |
| Monday Night | SSW 15 - 25 |
| Tuesday Morning | SW 40 - 50 |
| Tuesday Afternoon | SW 35 - 45 |
| Tuesday Night | WSW 35 - 45 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | SW 25 - 40 |
| Tuesday Morning | SW 50 - 60 |
| Tuesday Afternoon | SW 60 - 80 |
| Tuesday Night | W 35 - 50 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SW 30 - 40 |
| Tuesday Morning | SW 50 - 60 |
| Tuesday Afternoon | SW 60 - 80 |
| Tuesday Night | W 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.
Issued: 1:38 PM PST Monday, February 29, 2016
Extended Weather Synopsis for Tuesday night through Tuesday
The active weather pattern will continue for the rest of the work week and extend through next weekend with a weather system arriving every 12-24 hours.
Shortwave ridging over the area on Wednesday will quickly shift east with high clouds from the next frontal system overspreading the area. A north-south oriented front should pass through Wednseday night with showers lingering on Thursday. This system does not look particularly wet or strong. Another front will arrive during the day Friday. Middling snow levels should continue through the extended without any drastic warm-ups or cool downs.
Extended Weather
Olympics, Washington Cascades and Mt. Hood area
Light to occasionally moderate rain and snow showers ending.
Cloudy. Warming trend.
Cloudy with light rain and snow developing.
Mostly cloudy with light rain and snow showers tapering down Thursday night.
Increasing clouds with light rain and snow developing Olympics and west slopes of the Cascades.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Morning | Snow Level | 3000' - 4000' | 3000' - 4000' | 3500' - 4500' | |
| Wednesday Afternoon | Snow Level | 5000' - 6000' | 6000' - 7000' | 7000' - 8000' | |
| Wednesday Night | Snow Level | 3500' - 4500' | 3500' - 4500' | 3500' - 4500' | |
| Thursday - Friday | Snow Level | 4000' - 5000' | 4000' - 5000' | 5000' - 6000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3000' - 4000' |
| Wednesday Afternoon |
Snow Level 5000' - 6000' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday - Friday |
Snow Level 4000' - 5000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3000' - 4000' |
| Wednesday Afternoon |
Snow Level 6000' - 7000' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday - Friday |
Snow Level 4000' - 5000' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3500' - 4500' |
| Wednesday Afternoon |
Snow Level 7000' - 8000' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday - Friday |
Snow Level 5000' - 6000' |
* 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 29, 2016
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