Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Tuesday & Wednesday
An upper ridge gradually shifted east over the Northwest on Monday and although it wasn't warm we got a taste of spring. Well spring is going to hold off for quite awhile longer!
The upper ridge will gradually continue to the east and an increasing SSW flow aloft will be seen over the Northwest through Tuesday night. A warm front in the SSW flow will lift north over the Northwest Tuesday night causing precipitation mainly on the volcanoes especially Mt Baker. A little shot of alpine winds should be seen Tuesday night as the warm front moves over the area.
A SSW-NNE oriented cold front will stall over the Northwest on Wednesday and Thursday with a series of waves moving south to north along the front. This should continue to cause periods of precipitation mainly on the volcanoes especially Mt Baker with little change in snow levels expected through Wednesday night. This pattern may also wrap more than usual precipitation around to the Cascade east slopes.
Showers may temporarily decrease between waves on Wednesday night.
Weather Forecast
Olympics
| Tuesday Morning - Tuesday Afternoon |
Increasing light rain or snow. |
| Tuesday Night |
Increasing moderate to heavy rain or snow heaviest west Olympics. Moderate alpine winds. |
| Wednesday Morning - Wednesday Evening |
Periods of moderate to heavy rain or snow heaviest west Olympics. |
| Wednesday Night |
Temporarily decreasing showers. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Tuesday Morning - Tuesday Afternoon |
Increasing mid and high clouds. |
| Tuesday Night |
Increasing moderate to heavy rain or snow Mt Baker area. Increasing moderate rain or snow other volcanoes. Increasing light rain or snow Passes. Moderate alpine winds. |
| Wednesday Morning - Wednesday Evening |
Periods of moderate to heavy rain or snow volcanoes and periods of light to moderate rain or snow Cascade Passes. |
| Wednesday Night |
Temporarily decreasing showers. |
East slopes of the Washington Cascades
| Tuesday Morning - Tuesday Afternoon |
Increasing mid and high clouds. |
| Tuesday Night |
Increasing light rain or snow. Moderate alpine winds. |
| Wednesday Morning - Wednesday Evening |
Periods of light to moderate rain or snow. |
| Wednesday Night |
Temporarily decreasing showers. |
Mt. Hood Area
| Tuesday Morning - Tuesday Afternoon |
Increasing mid and high clouds. |
| Tuesday Night |
Increasing light rain or snow. Moderate alpine winds. |
| Wednesday Morning - Wednesday Evening |
Periods of light to moderate rain or snow. |
| Wednesday Night |
Temporarily decreasing showers. |
Issued: 3:09 PM PDT Tuesday, April 4, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Tuesday Afternoon | Snow Level * | 5000' | 4500' | 4500' | ' | ' | 5000' | ' | 5500' |
| Tuesday Night - Wednesday Night | Snow Level | 5500' | 5000' | 5000' | ' | ' | 5500' | ' | 6000' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Tuesday Night - Wednesday Night |
Snow Level 5500' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Tuesday Night - Wednesday Night |
Snow Level 5000' |
| Washington Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Tuesday Night - Wednesday Night |
Snow Level 5000' |
| Leavenworth | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Tuesday Night - Wednesday Night |
Snow Level 5500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night - Wednesday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Tuesday Night - Wednesday Night |
Snow Level 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.
Precipitation Forecast
| Wednesday | Wednesday | |
|---|---|---|
| Hurricane Ridge | 0.25 - 0.50 | 0 - 0.50 |
| Mt Baker Ski Area | 0.50 - 0.75 | 0 - 1.50 |
| Washington Pass | LT 0.25 | 0.25 - 0.50 |
| Stevens Pass | LT 0.25 | 0 - 0.50 |
| Snoqualmie Pass | LT 0.25 | 0 - 0.50 |
| Mission Ridge | LT 0.25 | 0 - 0.50 |
| Crystal Mt | LT 0.25 | 0 - 0.50 |
| Paradise | 0 - 0.50 | 0 - 1.00 |
| White Pass | LT 0.25 | 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: 3:09 PM PDT Tuesday, April 4, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Mid-day | SSE 15 - 25 | SSE 10 - 20 | SSE 15 - 25 | --- - | SSE 15 - 25 |
| Tuesday Afternoon | SSE 20 - 30 | SSE 15 - 25 | SSE 20 - 30 | --- - | SSE 20 - 30 |
| Tuesday Night | SSW 30 - 45 | SSE 25 - 35 | SSE 25 - 35 | --- - | SSW 20 - 30 |
| Wednesday Morning | SSW 15 - 25 | SSE 15 - 25 | SSE 15 - 25 | --- - | SSW 15 - 25 |
| Wednesday Afternoon | SSW 10 - 20 | SSW 10 - 20 | SSE 10 - 20 | --- - | SSW 10 - 20 |
| Wednesday Night | SSE 20 - 30 | SSE 20 - 30 | SSE 20 - 30 | --- - | SSE 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Mid-day | SSE 15 - 25 |
| Tuesday Afternoon | SSE 20 - 30 |
| Tuesday Night | SSW 30 - 45 |
| Wednesday Morning | SSW 15 - 25 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Night | SSE 20 - 30 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Mid-day | SSE 10 - 20 |
| Tuesday Afternoon | SSE 15 - 25 |
| Tuesday Night | SSE 25 - 35 |
| Wednesday Morning | SSE 15 - 25 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Night | SSE 20 - 30 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Mid-day | SSE 15 - 25 |
| Tuesday Afternoon | SSE 20 - 30 |
| Tuesday Night | SSE 25 - 35 |
| Wednesday Morning | SSE 15 - 25 |
| Wednesday Afternoon | SSE 10 - 20 |
| Wednesday Night | SSE 20 - 30 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Mid-day | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Mid-day | SSE 15 - 25 |
| Tuesday Afternoon | SSE 20 - 30 |
| Tuesday Night | SSW 20 - 30 |
| Wednesday Morning | SSW 15 - 25 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Night | SSE 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Mid-day | SSE 15 - 25 |
| Tuesday Afternoon | SSE 20 - 30 |
| Tuesday Night | SSW 30 - 45 |
| Wednesday Morning | SSW 15 - 25 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Night | SSE 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Mid-day | SSE 10 - 20 |
| Tuesday Afternoon | SSE 15 - 25 |
| Tuesday Night | SSE 25 - 35 |
| Wednesday Morning | SSE 15 - 25 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Night | SSE 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Mid-day | SSE 15 - 25 |
| Tuesday Afternoon | SSE 20 - 30 |
| Tuesday Night | SSE 25 - 35 |
| Wednesday Morning | SSE 15 - 25 |
| Wednesday Afternoon | SSE 10 - 20 |
| Wednesday Night | SSE 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Mid-day | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Mid-day | SSE 15 - 25 |
| Tuesday Afternoon | SSE 20 - 30 |
| Tuesday Night | SSW 20 - 30 |
| Wednesday Morning | SSW 15 - 25 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Night | SSE 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 | |
|---|---|---|---|---|---|
| Tuesday Mid-day | SSW 20 - 30 | SSW 15 - 25 | SSW 20 - 30 | --- - | SSW 20 - 30 |
| Tuesday Afternoon | SSW 25 - 35 | SSW 20 - 30 | SSW 25 - 35 | --- - | SSW 30 - 45 |
| Tuesday Night | SSW 45 - 65 | SSW 30 - 45 | SSW 45 - 65 | --- - | SSW 45 - 65 |
| Wednesday Morning | SSW 30 - 45 | SSW 30 - 45 | SSW 35 - 50 | --- - | SSW 40 - 60 |
| Wednesday Afternoon | SSW 25 - 35 | SSW 20 - 30 | SSW 25 - 35 | --- - | SSW 35 - 50 |
| Wednesday Night | SSW 40 - 60 | SSW 35 - 50 | SSW 40 - 60 | --- - | SSW 40 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Mid-day | SSW 20 - 30 |
| Tuesday Afternoon | SSW 25 - 35 |
| Tuesday Night | SSW 45 - 65 |
| Wednesday Morning | SSW 30 - 45 |
| Wednesday Afternoon | SSW 25 - 35 |
| Wednesday Night | SSW 40 - 60 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Mid-day | SSW 15 - 25 |
| Tuesday Afternoon | SSW 20 - 30 |
| Tuesday Night | SSW 30 - 45 |
| Wednesday Morning | SSW 30 - 45 |
| Wednesday Afternoon | SSW 20 - 30 |
| Wednesday Night | SSW 35 - 50 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Mid-day | SSW 20 - 30 |
| Tuesday Afternoon | SSW 25 - 35 |
| Tuesday Night | SSW 45 - 65 |
| Wednesday Morning | SSW 35 - 50 |
| Wednesday Afternoon | SSW 25 - 35 |
| Wednesday Night | SSW 40 - 60 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Mid-day | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Mid-day | SSW 20 - 30 |
| Tuesday Afternoon | SSW 30 - 45 |
| Tuesday Night | SSW 45 - 65 |
| Wednesday Morning | SSW 40 - 60 |
| Wednesday Afternoon | SSW 35 - 50 |
| Wednesday Night | SSW 40 - 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: 3:09 PM PDT Tuesday, April 4, 2017
Extended Weather Synopsis for Wednesday night through Wednesday
A last wave should finally carry the front across the Northwest on Thursday.
A vigorous surface low pressure system should move to Vancouver Island on Friday afternoon. This will cause active weather and strong shifting alpine winds in the Olympics Cascades.
An upper trough should follow the low across the Northwest on Saturday causing showers and lower snow levels.
Extended Weather
Olympics, Washington Cascades, Mt Hood
Periods of light to moderate rain or snow through midday. Light showers decreasing and ending in the afternoon and evening.
Increasing moderate to heavy rain or snow volcanoes and increasing light to moderate rain or snow Passes. Strong shifting alpine winds.
Decreasing showers and lower snow levels.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Thursday - Friday | Snow Level | 4000' - 6000' | 4000' - 6000' | 5000' - 7000' | |
| Saturday | Snow Level | 3000' - 4000' | 3000' - 4000' | 3000' - 4000' |
| Mt. Baker | Elevation |
|---|---|
| Thursday - Friday |
Snow Level 4000' - 6000' |
| Saturday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday - Friday |
Snow Level 4000' - 6000' |
| Saturday |
Snow Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Thursday - Friday |
Snow Level 5000' - 7000' |
| Saturday |
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 Apr 4, 2017
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.
Precipitation forecasts corrected at Baker and Snoqualmie 3 pm.