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
A strong ridge of high pressure over the area continues to slowly shift east of the Cascades this afternoon. Most NWAC stations have already risen into the 50s as of 1 pm PDT under mostly sunny skies. Freezing levels should eventually top out in the 8000-10000+ range today.
A slow moving frontal boundary currently around 135W will sag south and east across the area on Tuesday. Light precipitation will start first for the Olympics and north Cascades Tuesday morning and eventually reach the central and south Cascades in the afternoon. Mt. Hood should mainly see increasing clouds during the day on Tuesday but remain dry. The frontal system will bring about a quick increase in SW winds along with a burst of moderate precipitation in the afternoon and early evening. Showers and rapidly falling snow levels will occur behind the front Tuesday night...but shower activity should quickly diminish into early Wednesday morning.
Weather Forecast
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday Afternoon |
Mostly sunny. Warm. |
| Monday Night |
Mostly clear becoming partly cloudy with increasing high clouds overnight. |
| Tuesday Morning |
Cloudy with light rain and snow developing Olympics and north Cascades. Partly to mostly cloudy central and south Cascades. |
| Tuesday Afternoon |
Light to moderate rain and snow with increasing winds. |
| Tuesday Night |
Mostly cloudy with light to occasionally moderate rain and snow showers decreasing overnight. Cooling trend. |
East slopes of the Washington Cascades
| Monday Afternoon |
Partly to mostly sunny. Warm. |
| Monday Night |
Mostly clear becoming partly cloudy with increasing high clouds overnight. |
| Tuesday Morning |
Mostly cloudy with light rain and snow developing north Cascades. Partly cloudy central and south Cascades. |
| Tuesday Afternoon |
Light rain and snow with increasing winds. |
| Tuesday Night |
Mostly cloudy with light rain and snow showers decreasing overnight. Clearing and cooling trend. |
Mt. Hood Area
| Monday |
Mostly sunny. Warm. |
| Monday Night |
Mostly clear becoming partly cloudy with increasing high clouds overnight. |
| Tuesday |
Partly cloudy becoming mostly cloudy late in the afternoon with increasing winds. |
| Tuesday Night |
Light to occasionally moderate rain and snow becoming light showers in the evening and decreasing overnight. Cooling trend. |
Issued: 1:29 PM PDT Monday, April 7, 2014
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Afternoon | Freezing Level | 9000' | ' | ' | ' | ' | 9500' | ' | 10500' |
| Monday Night - Tuesday Morning | Freezing Level | 8000' | ' | ' | ' | ' | 8500' | ' | 10000' |
| Tuesday Afternoon | Snow Level | 5000' | ' | ' | ' | ' | 6500' | ' | 7500' |
| Tuesday Night | Snow Level | 3500' | ' | ' | ' | ' | 3500' | ' | 5500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level 9000' |
| Monday Night - Tuesday Morning |
Freezing Level 8000' |
| Tuesday Afternoon |
Snow Level 5000' |
| Tuesday Night |
Snow Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Washington Pass | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Leavenworth | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level 9500' |
| Monday Night - Tuesday Morning |
Freezing Level 8500' |
| Tuesday Afternoon |
Snow Level 6500' |
| Tuesday Night |
Snow Level 3500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon |
Freezing Level 10500' |
| Monday Night - Tuesday Morning |
Freezing Level 10000' |
| Tuesday Afternoon |
Snow Level 7500' |
| Tuesday Night |
Snow Level 5500' |
* 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 0.25 |
| Mt Baker Ski Area | LT 0.10 | 0.50 - 0.75 |
| Washington Pass | LT 0.10 | LT 0.25 |
| Stevens Pass | LT 0.10 | 0 - 0.50 |
| Snoqualmie Pass | LT 0.10 | 0 - 0.50 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.25 |
| Paradise | LT 0.10 | 0 - 0.50 |
| White Pass | LT 0.10 | LT 0.25 |
| Mt Hood Meadows | LT 0.10 | LT 0.25 |
| Timberline | LT 0.10 | 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: 1:29 PM PDT Monday, April 7, 2014
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Afternoon - Tuesday Morning | SW 5 - 15 | --- - | SW 5 - 15 | --- - | SW 5 - 15 |
| Tuesday Afternoon | WSW 15 - 30 | --- - | SW 15 - 25 | --- - | WSW 15 - 30 |
| Tuesday Night | W 10 - 20 | --- - | W 10 - 20 | --- - | W 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon - Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | WSW 15 - 30 |
| Tuesday Night | W 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon - Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | SW 15 - 25 |
| Tuesday Night | W 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Afternoon - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon - Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | WSW 15 - 30 |
| Tuesday Night | W 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Afternoon - Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | WSW 15 - 30 |
| Tuesday Night | W 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon - Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | SW 15 - 25 |
| Tuesday Night | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon - Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon - Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | WSW 15 - 30 |
| Tuesday Night | W 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 - Monday Night | --- - | --- - | SW 20 - 30 | --- - | SW 20 - 30 |
| Tuesday Morning | --- - | --- - | SW 25 - 35 | --- - | SW 25 - 35 |
| Tuesday Afternoon | --- - | --- - | SW 35 - 45 | --- - | SW 35 - 45 |
| Tuesday Night | --- - | --- - | W 25 - 35 | --- - | W 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | SW 20 - 30 |
| Tuesday Morning | SW 25 - 35 |
| Tuesday Afternoon | SW 35 - 45 |
| Tuesday Night | W 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | SW 20 - 30 |
| Tuesday Morning | SW 25 - 35 |
| Tuesday Afternoon | SW 35 - 45 |
| Tuesday 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: 1:29 PM PDT Monday, April 7, 2014
Extended Weather Synopsis for Friday night through Friday
On Wednesday, cool NW flow aloft and onshore flow at the surface should make for a mostly cloudy day along the west slopes and Mt. Hood along with some spotty showers. On Thursday, a frontal boundary hung up near Vancouver Island may bring periods of light precipitation to the north Cascades...but should mostly deliver more cloud cover to northern sections...with sunnier skies and warmer freezing levels expected further south. A shortwave trough should dive down in the northwest flow on Friday...briefly pushing snow levels downward along with scattered showers across the area.
Extended Weather
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
Mostly cloudy with isolated light rain and snow showers.
Partly cloudy, except mostly cloudy with very light rain or snow possible Olympics and north Cascades.
Mostly cloudy with scattered rain and snow showers.
East slopes of the Washington Cascades
Partly cloudy with isolated light rain and snow showers near the Cascade crest.
Partly cloudy, except mostly cloudy with very light rain or snow possible north Cascades.
Mostly cloudy with scattered rain and snow showers.
Mt. Hood Area
Partly cloudy with isolated light rain and snow showers.
Mostly clear and mild.
Partly to mostly cloudy with isolated rain and snow showers.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday - Wednesday Night | Snow Level | ' - ' | 3500' - 4500' | 5500' - 6500' | |
| Thursday - Thursday Night | Freezing Level | ' - ' | 6000' - 7000' | 9000' - 10000' | |
| Friday | Snow Level | ' - ' | 4000' - 5000' | 6500' - 7500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Snow Level ' - ' |
| Thursday - Thursday Night |
Freezing Level ' - ' |
| Friday |
Snow Level ' - ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday - Thursday Night |
Freezing Level 6000' - 7000' |
| Friday |
Snow Level 4000' - 5000' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Snow Level 5500' - 6500' |
| Thursday - Thursday Night |
Freezing Level 9000' - 10000' |
| Friday |
Snow Level 6500' - 7500' |
* 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 Apr 7, 2014
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.