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 & Saturday
A broad trough slides east across the intermountain west on Sunday. An upper low within the broad trough has an associated shortwave feature which crosses the Pacific Northwest late Sunday afternoon and evening from the northwest. The trough feature will bring increasing snow showers today through the evening hours with decreasing snow shower activity after midnight tonight through Monday evening. So far, Snoqualmie Pass has received significantly more snow than nearby locations with 5" since 4AM this morning. Crest-level winds will generally be light westerly, but are increasing and may become moderate Sunday night before decreasing on Monday.
Little sunshine is expected Sunday and Monday, but sun breaks are likely late Monday, particularly in the south. The clearing skies will work their way northward into the Olympics and south Cascades Monday night as high pressure gradually builds into the region.
Temperatures should stay cool throughout the short-term forecast period.
Weather Forecast
Olympics
| Sunday | Periods of light snow. |
| Sunday Night | Decreasing chance of light snow showers. |
| Monday | Isolated light snow showers. |
| Monday Night | Clearing skies. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Sunday | Increasing light snow showers with occasional heavier squalls. |
| Sunday Night | More sustained light snow showers in the evening hours, decreasing in coverage after midnight, but convergence possible. |
| Monday | Mostly cloudy with decreasing light snow showers, becoming partly cloudy in the south during the afternoon. |
| Monday Night | Mostly cloudy in the north with skies gradually clearing in the south. |
East Slopes of the Washington Cascades
| Sunday | Mostly cloudy with an increasing chance of light snow showers or the occasional heavier snow squall. |
| Sunday Night | Cloudy with light snow showers decreasing in coverage after midnight, but convergence possible. |
| Monday | Cloudy with light snow showers decreasing in coverage after midnight, but convergence possible. |
| Monday Night | Mostly cloudy in the north with skies gradually clearing in the south. |
Mt. Hood
| Sunday | Mostly sunny in the morning with clouds moving in by noon. Chance of light snow showers in the late afternoon. |
| Sunday Night | More sustained light snow showers decreasing after midnight. |
| Monday | Chance of an isolated snow shower in the morning, then becoming partly to mostly sunny. |
| Monday Night | Mostly clear. |
Issued: 2:12 PM PST Sunday, March 4, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Morning | Snow Level | 2000' | 2000' | 2000' | ' | ' | 2000' | ' | 2500' |
| Sunday Afternoon | Snow Level | 2000' | 2000' | 2500' | ' | ' | 2500' | ' | 3000' |
| Sunday Night | Snow Level | 500' | 500' | 500' | ' | ' | 1000' | ' | 1000' |
| Monday Morning | Snow Level | 2000' | 1500' | 1500' | ' | ' | 2000' | ' | 2500' |
| Monday Afternoon | Snow Level | 2000' | 2000' | 2500' | ' | ' | 2500' | ' | 3500' |
| Monday Night | Snow Level | 1000' | 1000' | 500' | ' | ' | 500' | ' | 1000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Night |
Snow Level 500' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 1000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Night |
Snow Level 500' |
| Monday Morning |
Snow Level 1500' |
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 1000' |
| Washington Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Night |
Snow Level 500' |
| Monday Morning |
Snow Level 1500' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Night |
Snow Level 500' |
| Leavenworth | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Night |
Snow Level 1000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Night |
Snow Level 500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2500' |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Night |
Snow Level 1000' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Night |
Snow Level 1000' |
* 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 | LT 0.10 |
| Mt Baker Ski Area | LT 0.25 | LT 0.10 |
| Washington Pass | LT 0.25 | LT 0.10 |
| Stevens Pass | LT 0.25 | LT 0.25 |
| Snoqualmie Pass | 0.50 - 0.75 | LT 0.25 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.25 | LT 0.10 |
| Paradise | LT 0.25 | LT 0.25 |
| White Pass | LT 0.25 | LT 0.25 |
| Mt Hood Meadows | LT 0.25 | LT 0.10 |
| Timberline | LT 0.25 | LT 0.10 |
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: 2:12 PM PST Sunday, March 4, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Afternoon | WSW 15 - 25 | SW 10 - 20 | WSW 15 - 25 | --- - | WSW 15 - 25 |
| Sunday Night | WSW 10 - 20 | SW 10 - 20 | WSW 20 - 30 | --- - | WSW 20 - 30 |
| Monday Morning | WSW 5 - 15 | SW 5 - 15 | W 15 - 25 | --- - | W 10 - 20 |
| Monday Afternoon | WSW 5 - 15 | WSW 10 - 20 | W 10 - 20 | --- - | W 10 - 20 |
| Monday Night | SSW 0 - 10 | SW 0 - 10 | W 5 - 15 | --- - | W 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 10 - 20 |
| Monday Morning | WSW 5 - 15 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | SSW 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Afternoon | SW 10 - 20 |
| Sunday Night | SW 10 - 20 |
| Monday Morning | SW 5 - 15 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 20 - 30 |
| Monday Morning | W 15 - 25 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 20 - 30 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 10 - 20 |
| Monday Morning | WSW 5 - 15 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | SSW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 10 - 20 |
| Sunday Night | SW 10 - 20 |
| Monday Morning | SW 5 - 15 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 20 - 30 |
| Monday Morning | W 15 - 25 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 20 - 30 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 5 - 15 |
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 20 - 30 | SW 20 - 30 | WSW 25 - 35 | --- - | W 20 - 30 |
| Sunday Night | WSW 25 - 35 | W 25 - 35 | WSW 30 - 40 | --- - | WSW 25 - 35 |
| Monday Morning | W 10 - 20 | WSW 15 - 25 | W 20 - 30 | --- - | W 20 - 30 |
| Monday Afternoon | W 10 - 20 | W 10 - 20 | W 20 - 30 | --- - | W 20 - 30 |
| Monday Night | W 10 - 20 | W 10 - 20 | W 15 - 25 | --- - | WSW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 20 - 30 |
| Sunday Night | WSW 25 - 35 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night | W 25 - 35 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 25 - 35 |
| Sunday Night | WSW 30 - 40 |
| Monday Morning | W 20 - 30 |
| Monday Afternoon | W 20 - 30 |
| Monday Night | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Afternoon | W 20 - 30 |
| Sunday Night | WSW 25 - 35 |
| Monday Morning | W 20 - 30 |
| Monday Afternoon | W 20 - 30 |
| Monday Night | WSW 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.
Issued: 2:12 PM PST Sunday, March 4, 2018
Extended Weather Synopsis for Saturday night through Saturday
The high pressure will continue to build northward along the U.S. West Coast Tuesday through Wednesday and will bring dry weather and warming temperatures. It will push the slightly moist flow from earlier in the week north into Canada. A stationary closed low spinning off the coast of California at 140 W on Monday will begin moving NE toward Washington State and by Wednesday night the low will be several hundred miles off the Oregon Coast. By Thursday the upper low and associated trough will cross Washington State as the trough flattens. This system will bring rain and mountain snow along with modest cooling.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday | Freezing Level | 2000' - 4000' | 3000' - 4000' | 4000' - 6000' | |
| Tuesday Night | Freezing Level | 3000' - 4000' | 3000' - 4000' | 7000' - 8000' | |
| Wednesday | Freezing Level | 4000' - 6000' | 4000' - 6000' | 7000' - 8000' | * |
| Wednesday Night | Snow Level | 3000' - 5000' | 3000' - 4000' | 4500' - 6000' | * |
| Thursday | Snow Level | 3000' - 4000' | 3000' - 4000' | 3500' - 4500' | * |
| Mt. Baker | Elevation |
|---|---|
| Tuesday |
Freezing Level 2000' - 4000' |
| Tuesday Night |
Freezing Level 3000' - 4000' |
| Wednesday |
Freezing Level 4000' - 6000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 3000' - 5000' (Easterly Flow *) |
| Thursday |
Snow Level 3000' - 4000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday |
Freezing Level 3000' - 4000' |
| Tuesday Night |
Freezing Level 3000' - 4000' |
| Wednesday |
Freezing Level 4000' - 6000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 3000' - 4000' (Easterly Flow *) |
| Thursday |
Snow Level 3000' - 4000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Tuesday |
Freezing Level 4000' - 6000' |
| Tuesday Night |
Freezing Level 7000' - 8000' |
| Wednesday |
Freezing Level 7000' - 8000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 4500' - 6000' (Easterly Flow *) |
| Thursday |
Snow Level 3500' - 4500' (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 Mar 4, 2018
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