Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Saturday & Thursday
A trough sits over the U.S. west coast with an embedded closed low off the coast of central Oregon slowly drifting south on Saturday, while a second closed low within the same trough is spinning over southern Alberta on Saturday morning and will drift north and slightly west today and tonight. The diverging lows will move moisture away from the forecast area. Convection is in the forecast and is bringing deeper cumulus clouds to most mountain locations this afternoon, with some scattered moderate-intensity snow showers mostly south of I-90.
Tonight, the low off the coast of Oregon ejects east as the trough begins moving eastward.
On Saturday as the trough exits, a very weak shortwave trough will rotate around the Alberta low, bringing another chance of light snow shower activity late Sunday and Sunday night.
Snow levels will be below pass level thorughout the short-term forecast period.
Weather Forecast
Olympics
| Saturday | Light NE or calm wind with clouds and occasional light snow along the lower elevation N flanks of the Olympics. Otherwise, clear in the morning with partly cloudy skies in the afternoon. |
| Saturday Night | Mostly clear. |
| Sunday | Clear in the morning, becoming cloudy with a slight chance of a snow shower late in the day. |
| Sunday Night | Mostly cloudy with a chance of a light snow shower. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Saturday | Cumulus clouds with moderate-intensity showers mostly south of I-90, decreasing as the sun goes down. |
| Saturday Night | Mostly clear. |
| Sunday | Clear skies giving way to mostly cloudy skies in the morning in the north and central parts and including the southern part by afternoon. A chance of light snow showers later in the day. |
| Sunday Night | Mostly cloudy with light snow showers. |
East Slopes of the Washington Cascades
| Saturday | Cumulus clouds with moderate-intensity showers mostly south of I-90, decreasing as the sun goes down. |
| Saturday Night | Mostly clear. |
| Sunday | Clear skies giving way to mostly cloudy skies in the morning in the north and central parts and including the southern part by afternoon. A chance of light snow showers later in the day. Mostly clear farther away from the Cascade Crest. |
| Sunday Night | Mostly cloudy with light snow showers with slightly more snow shower activity in the south Cascdes. Mostly clear farther away from the Cascade Crest. |
Mt. Hood
| Saturday | Moderate convective showers. 1-2" accumulations likely. |
| Saturday Night | Clearing skies. |
| Sunday | Increasing clouds with snow showers developing in the afternoon. |
| Sunday Night | Snow showers. |
Issued: 4:04 PM PST Saturday, March 3, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Afternoon | Snow Level | 2000' | 1500' | 2500' | ' | ' | 2500' | ' | 2000' |
| Saturday Night | Snow Level | 1000' | 0' | 0' | ' | ' | 1000' | ' | 2000' |
| Sunday Morning | Snow Level | 1500' | 500' | 0' | ' | ' | 1000' | ' | 1500' |
| Sunday Afternoon | Snow Level | 2000' | 2000' | 2500' | ' | ' | 3000' | ' | 3000' |
| Sunday Night | Snow Level | 1000' | 1000' | 1000' | ' | ' | 1000' | ' | 1500' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 2000' |
| Saturday Night |
Snow Level 1000' |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Night |
Snow Level 1000' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 1500' |
| Saturday Night |
Snow Level 0' |
| Sunday Morning |
Snow Level 500' |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Night |
Snow Level 1000' |
| Washington Pass | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 2500' |
| Saturday Night |
Snow Level 0' |
| Sunday Morning |
Snow Level 0' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Night |
Snow Level 1000' |
| Leavenworth | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 2500' |
| Saturday Night |
Snow Level 1000' |
| Sunday Morning |
Snow Level 1000' |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Night |
Snow Level 1000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Sunday Morning |
Snow Level ' |
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Afternoon |
Snow Level 2000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Night |
Snow Level 1500' |
* 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
| Thursday | Thursday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | LT 0.25 |
| Snoqualmie Pass | LT 0.10 | LT 0.25 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | 0.25 - 0.50 |
| White Pass | LT 0.10 | LT 0.25 |
| Mt Hood Meadows | LT 0.25 | LT 0.25 |
| Timberline | LT 0.25 | 0.25 - 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: 4:04 PM PST Saturday, March 3, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Afternoon | W 5 - 15 | VAR 0 - 10 | W 0 - 10 | --- - | E 0 - 10 |
| Saturday Night | W 5 - 15 | VAR 0 - 10 | VAR 0 - 10 | --- - | W 10 - 20 |
| Sunday Morning | WSW 10 - 20 | SW 5 - 15 | W 10 - 20 | --- - | W 15 - 25 |
| Sunday Afternoon | WSW 15 - 25 | SW 10 - 20 | WSW 15 - 25 | --- - | WSW 15 - 25 |
| Sunday Night | WSW 15 - 25 | WSW 10 - 20 | WSW 15 - 25 | --- - | WSW 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Afternoon | W 5 - 15 |
| Saturday Night | W 5 - 15 |
| Sunday Morning | WSW 10 - 20 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Afternoon | VAR 0 - 10 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | SW 5 - 15 |
| Sunday Afternoon | SW 10 - 20 |
| Sunday Night | WSW 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Afternoon | W 0 - 10 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Saturday Afternoon | E 0 - 10 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 15 - 25 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Afternoon | W 5 - 15 |
| Saturday Night | W 5 - 15 |
| Sunday Morning | WSW 10 - 20 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Afternoon | VAR 0 - 10 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | SW 5 - 15 |
| Sunday Afternoon | SW 10 - 20 |
| Sunday Night | WSW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | W 0 - 10 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Afternoon | E 0 - 10 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 15 - 25 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 20 - 30 |
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 | |
|---|---|---|---|---|---|
| Saturday Afternoon | WSW 5 - 15 | W 5 - 15 | VAR 0 - 10 | --- - | VAR 0 - 10 |
| Saturday Night | WSW 10 - 20 | WSW 10 - 20 | W 15 - 25 | --- - | WSW 10 - 20 |
| Sunday Morning | WSW 15 - 25 | WSW 10 - 20 | W 20 - 30 | --- - | W 20 - 30 |
| Sunday Afternoon | WSW 15 - 25 | WSW 20 - 30 | WSW 25 - 35 | --- - | W 25 - 35 |
| Sunday Night | WSW 15 - 25 | WSW 20 - 30 | W 30 - 40 | --- - | W 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Afternoon | WSW 5 - 15 |
| Saturday Night | WSW 10 - 20 |
| Sunday Morning | WSW 15 - 25 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Night | WSW 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | W 5 - 15 |
| Saturday Night | WSW 10 - 20 |
| Sunday Morning | WSW 10 - 20 |
| Sunday Afternoon | WSW 20 - 30 |
| Sunday Night | WSW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | VAR 0 - 10 |
| Saturday Night | W 15 - 25 |
| Sunday Morning | W 20 - 30 |
| Sunday Afternoon | WSW 25 - 35 |
| Sunday Night | W 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday Morning | --- - |
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Afternoon | VAR 0 - 10 |
| Saturday Night | WSW 10 - 20 |
| Sunday Morning | W 20 - 30 |
| Sunday Afternoon | W 25 - 35 |
| Sunday Night | W 25 - 35 |
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: 4:04 PM PST Saturday, March 3, 2018
Extended Weather Synopsis for Thursday night through Thursday
A ridge will slowly build Monday through early Wednesday. By Tuesday the ridge becomes more pronounced and pushes any shower activity north of our region, bringing drier weather.
The next trough and associated low pressure will approach the region late Wednesday or Wednesday night from the W-SW.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday | Snow Level | 1000' - 2000' | 1500' - 2500' | 2000' - 3000' | |
| Monday Night | Snow Level | 1000' - 2000' | 1500' - 2500' | 2500' - 3500' | * |
| Tuesday | Freezing Level | 3000' - 4000' | 3500' - 4500' | 4000' - 5500' | * |
| Tuesday Night | Freezing Level | 3000' - 4000' | 3000' - 4000' | 6000' - 7000' | * |
| Wednesday | Freezing Level | 3500' - 5500' | 3500' - 5500' | 6500' - 7500' | * |
| Mt. Baker | Elevation |
|---|---|
| Monday |
Snow Level 1000' - 2000' |
| Monday Night |
Snow Level 1000' - 2000' (Easterly Flow *) |
| Tuesday |
Freezing Level 3000' - 4000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 3000' - 4000' (Easterly Flow *) |
| Wednesday |
Freezing Level 3500' - 5500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday |
Snow Level 1500' - 2500' |
| Monday Night |
Snow Level 1500' - 2500' (Easterly Flow *) |
| Tuesday |
Freezing Level 3500' - 4500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 3000' - 4000' (Easterly Flow *) |
| Wednesday |
Freezing Level 3500' - 5500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday |
Snow Level 2000' - 3000' |
| Monday Night |
Snow Level 2500' - 3500' (Easterly Flow *) |
| Tuesday |
Freezing Level 4000' - 5500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 6000' - 7000' (Easterly Flow *) |
| Wednesday |
Freezing Level 6500' - 7500' (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 3, 2018
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