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 & Friday
The Pacific Northwest will stay in cool NW flow aloft with scattered light snow showers and generally cloudy skies today. An area of convergence west of Stevens Pass this morning will break up during the day. There may be a few sunbreaks poking through in the afternoon. Moderate west winds in the Mt. Hood area will slowly decrease this afternoon.
Flat upper level ridging will move over the area Tuesday, providing us with a dry and fair weather day. Afternoon cumulus buildup looks to be trapped near ridgecrest Tuesday afternoon as warmer air moves in aloft, robbing us of a full day of sunshine. Temperatures will warm slightly on Tuesday. The dry weather will continue Tuesday night.
Weather Forecast
Olympics
| Monday | Cloudy with scattered light snow showers this morning. Mostly cloudy with light isolated showers in the afternoon. |
| Monday Night | Mostly cloudy becoming mostly clear late tonight. |
| Tuesday | Mostly clear in the morning, becoming partly to mostly sunny with cumulus building in the afternoon. Slight warming trend. |
| Tuesday Night | Mostly clear. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Monday | Cloudy with scattered light snow showers, locally moderate near a convergence zone this morning west of Stevens Pass. Mostly cloudy with light isolated showers in the afternoon. |
| Monday Night | Mostly cloudy becoming mostly clear late tonight. |
| Tuesday | Mostly clear in the morning, becoming partly to mostly sunny with cumulus building in the afternoon. Slight warming trend. |
| Tuesday Night | Mostly clear. |
East Slopes of the Washington Cascades
| Monday | Cloudy with isolated light snow showers near the Cascade crest this morning, becoming mostly cloudy with light isolated showers in the afternoon. |
| Monday Night | Mostly cloudy becoming mostly clear late tonight. |
| Tuesday | Mostly clear in the morning, becoming partly to mostly sunny with cumulus building in the afternoon near the Cascade Crest. Slight warming trend. |
| Tuesday Night | Mostly clear. |
Mt. Hood
| Monday | Cloudy with scattered light snow showers this morning. Mostly cloudy with light isolated showers in the afternoon. Moderate West winds decreasing in the afternoon. |
| Monday Night | Partly cloudy becoming mostly clear late tonight. |
| Tuesday | Mostly clear in the morning, becoming partly to mostly sunny with cumulus building in the afternoon. Slight warming trend. |
| Tuesday Night | Mostly clear. |
Issued: 2:23 PM PST Monday, March 5, 2018
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 | 2000' | 1500' | 1500' | ' | ' | 2000' | ' | 3000' |
| Monday Night | Snow Level | 1500' | 1500' | 500' | ' | ' | 1000' | ' | 2500' |
| Tuesday Morning | Freezing Level | 1500' | 500' | 0' | ' | ' | 1000' | ' | 2000' |
| Tuesday Afternoon | Freezing Level | 3500' | 3000' | 4000' | ' | ' | 4000' | ' | 5000' |
| Tuesday Night | Freezing Level | 3500' | 2500' | 500' | ' | ' | 2000' | ' | 4000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Freezing Level 1500' |
| Tuesday Afternoon |
Freezing Level 3500' |
| Tuesday Night |
Freezing Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 1500' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Freezing Level 500' |
| Tuesday Afternoon |
Freezing Level 3000' |
| Tuesday Night |
Freezing Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 1500' |
| Monday Night |
Snow Level 500' |
| Tuesday Morning |
Freezing Level 0' |
| Tuesday Afternoon |
Freezing Level 4000' |
| Tuesday Night |
Freezing Level 500' |
| Leavenworth | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Freezing Level ' |
| Stevens Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Freezing Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Freezing Level 1000' |
| Tuesday Afternoon |
Freezing Level 4000' |
| Tuesday Night |
Freezing Level 2000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' |
| Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Freezing Level ' |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 3000' |
| Monday Night |
Snow Level 2500' |
| Tuesday Morning |
Freezing Level 2000' |
| Tuesday Afternoon |
Freezing Level 5000' |
| Tuesday Night |
Freezing 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
| Friday | Friday | |
|---|---|---|
| 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 0.25 | LT 0.10 |
| Snoqualmie Pass | LT 0.25 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.25 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | 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: 2:23 PM PST Monday, March 5, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Afternoon | W 5 - 15 | SW 0 - 10 | WSW 5 - 15 | --- - | W 10 - 20 |
| Monday Night | W 0 - 10 | W 0 - 10 | W 0 - 10 | --- - | W 0 - 10 |
| Tuesday Morning | WNW 5 - 15 | W 0 - 10 | WNW 5 - 15 | --- - | W 5 - 15 |
| Tuesday Afternoon | W 5 - 15 | SW 5 - 15 | WSW 5 - 15 | --- - | W 10 - 20 |
| Tuesday Night | SW 10 - 20 | SW 10 - 20 | SW 10 - 20 | --- - | SW 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon | W 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | WNW 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon | SW 0 - 10 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | SW 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | WNW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | W 10 - 20 |
| Tuesday Night | SW 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Afternoon | W 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | WNW 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon | SW 0 - 10 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | SW 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | WNW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | W 10 - 20 |
| Tuesday Night | SW 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 | |
|---|---|---|---|---|---|
| Monday Afternoon | W 10 - 20 | W 10 - 20 | WNW 15 - 25 | --- - | WNW 15 - 25 |
| Monday Night | W 5 - 15 | W 5 - 15 | WNW 5 - 15 | --- - | W 10 - 20 |
| Tuesday Morning | WNW 5 - 15 | W 0 - 10 | WNW 5 - 15 | --- - | W 5 - 15 |
| Tuesday Afternoon | W 5 - 15 | SW 5 - 15 | WSW 5 - 15 | --- - | W 10 - 20 |
| Tuesday Night | SW 10 - 20 | SW 10 - 20 | SW 10 - 20 | --- - | SW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | WNW 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Afternoon | W 10 - 20 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | SW 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon | WNW 15 - 25 |
| Monday Night | WNW 5 - 15 |
| Tuesday Morning | WNW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 |
| Tuesday Night | SW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon | WNW 15 - 25 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | W 10 - 20 |
| Tuesday Night | SW 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.
Issued: 2:23 PM PST Monday, March 5, 2018
Extended Weather Synopsis for Friday night through Friday
Broad upper level ridging will build over the interior West Wednesday, but a closed low meandering ever closer to the Oregon/California coastline will begin to spread some mid and high clouds up from the south during the day. Relatively mild freezing levels are expected Wednesday with the main question being how much cloud cover will mute the overall warming trend. The low pressure system will spread light precipitation over the area Wednesday night.
The closed low weakens as it passes over Washington State Thursday. This should bring some light to occasionally moderate precipitation to the mountains as well as a cooling trend. Showers will continue Thursday night.
Weak ridging will attempt to build on Friday, but light warm frontal moisture from a system mainly affecting British Columbia may brush the northern half of the Washington Cascades.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday | Freezing Level | 5000' - 6000' | 6000' - 7000' | 6500' - 7500' | |
| Wednesday Night | Snow Level | 2500' - 3500' | 3000' - 4000' | 4000' - 5000' | |
| Thursday | Snow Level | 3500' - 4500' | 3500' - 4500' | 4000' - 5000' | |
| Thursday Night | Snow Level | 3000' - 4000' | 3000' - 4000' | 4000' - 5000' | |
| Friday | Snow Level | 2000' - 3000' | 2000' - 3000' | 3000' - 4000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday |
Freezing Level 5000' - 6000' |
| Wednesday Night |
Snow Level 2500' - 3500' |
| Thursday |
Snow Level 3500' - 4500' |
| Thursday Night |
Snow Level 3000' - 4000' |
| Friday |
Snow Level 2000' - 3000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday |
Freezing Level 6000' - 7000' |
| Wednesday Night |
Snow Level 3000' - 4000' |
| Thursday |
Snow Level 3500' - 4500' |
| Thursday Night |
Snow Level 3000' - 4000' |
| Friday |
Snow Level 2000' - 3000' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday |
Freezing Level 6500' - 7500' |
| Wednesday Night |
Snow Level 4000' - 5000' |
| Thursday |
Snow Level 4000' - 5000' |
| Thursday Night |
Snow Level 4000' - 5000' |
| Friday |
Snow Level 3000' - 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.
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 5, 2018
The NWAC program is administered by the USDA-Forest Service and operates from the National Weather Service Forecast Office in Seattle. NWAC services are made possible by important collaboration and support from a wide variety of federal, state and private cooperators.