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 & Saturday
A deep upper level low in the NE Pacific will send a number of Pacific frontal systems our way over the next few days. A frontal system extending from a deep low pressure system north of Vancouver Island pushed through the Cascades earlier this afternoon. The track of this low pressure system caused a round of locally stronger southerly winds in the Olympics and northwest Cascades. Light rainfall has transitioned to light and scattered showers this afternoon with a slow cooling trend. Snow levels were generally still above 5000 ft as of 3 pm. Locally heavier showers have been seen in the Mt. Baker area. Scattered showers will continue Tuesday night as another Pacific frontal system approaches the area with further cooling expected overnight.
The next frontal system will slowly move inland on Wednesday, splitting as the Pacific jet drives the bulk of the energy into northern California during the day. This should smear light to occasionally moderate precipitation across the area and make for another cloudy day. Snow levels will slightly rebound from 3500-4000 ft in the morning to the 4000-5000 ft range Wednesday afternoon. As the cold upper level low moves closer to the Pacific Northwest, colder air will filter into the area overnight as scattered light showers continue.
Weather Forecast
Olympics
| Tuesday Afternoon | Partly to mostly cloudy with isolated light rain and snow showers. Windy. Cooling trend. |
| Tuesday Night | Mostly cloudy with scattered light rain and snow showers in the evening, then light rain and snow developing after midnight. |
| Wednesday | Light to occasionally moderate rain and snow. |
| Wednesday Night | Mostly cloudy with scattered light rain and snow showers. Cooling trend. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Tuesday Afternoon | Cloudy with scattered light rain and snow showers. Locally heavier showers Mt. Baker area. Windy Mt Baker area. Slow cooling trend. |
| Tuesday Night | Mostly cloudy with scattered light rain and snow showers. |
| Wednesday | Light rain and snow developing during the morning and becoming light to occasionally moderate in the afternoon. |
| Wednesday Night | Light rain and snow in the evening becoming mostly cloudy with scattered light rain and snow showers after midnight. Cooling trend. |
East Slopes of the Washington Cascades
| Tuesday Afternoon | Mostly cloudy with scattered light rain and snow showers. Afternoon sunbreaks possible. Slow cooling trend. |
| Tuesday Night | Partly to mostly cloudy with isolated light rain and snow showers. |
| Wednesday | Light rain and snow developing late morning or mid-day. |
| Wednesday Night | Light rain and snow in the evening becoming mostly cloudy with scattered light rain and snow showers after midnight. Cooling trend. |
Mt. Hood
| Tuesday Afternoon | Mostly cloudy with scattered light rain and snow showers in the afternoon. Slow cooling trend. |
| Tuesday Night | Mostly cloudy with scattered light rain and snow showers. |
| Wednesday | Light rain and snow developing and becoming light to moderate in the afternoon. |
| Wednesday Night | Light rain and snow in the evening becoming mostly cloudy with scattered light rain and snow showers after midnight. Cooling trend. |
Issued: 3:43 PM PDT Tuesday, April 10, 2018
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 | 5500' | 5000' | 5500' | ' | ' | 5500' | ' | 5500' |
| Tuesday Night | Snow Level | 3500' | 3500' | 4000' | ' | ' | 4000' | ' | 4000' |
| Wednesday Morning | Snow Level | 4000' | 3500' | 3500' | ' | ' | 3500' | ' | 4000' |
| Wednesday Afternoon | Snow Level | 3500' | 4000' | 4500' | ' | ' | 4500' | ' | 5000' |
| Wednesday Night | Snow Level | 2500' | 2500' | 2500' | ' | ' | 2500' | ' | 2500' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 5500' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 3500' |
| Wednesday Night |
Snow Level 2500' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 5000' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4000' |
| Wednesday Night |
Snow Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 5500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4500' |
| Wednesday Night |
Snow Level 2500' |
| Leavenworth | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 5500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4500' |
| Wednesday Night |
Snow Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Afternoon |
Snow Level 5500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 5000' |
| Wednesday Night |
Snow Level 2500' |
* 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 | 0 - 0.50 | 0 - 0.50 |
| Mt Baker Ski Area | 1.00 - 1.50 | 0 - 1.00 |
| Washington Pass | LT 0.25 | 0.25 - 0.50 |
| Stevens Pass | 0 - 0.50 | 0 - 0.50 |
| Snoqualmie Pass | 0 - 0.50 | 0.50 - 0.75 |
| Mission Ridge | LT 0.25 | LT 0.25 |
| Crystal Mt | 0.25 - 0.50 | 0.50 - 0.75 |
| Paradise | 0 - 0.50 | 0.75 - 1.00 |
| White Pass | LT 0.25 | 0 - 0.50 |
| Mt Hood Meadows | 0 - 0.50 | 0 - 0.75 |
| Timberline | 0.50 - 0.75 | 0 - 1.00 |
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: 3:43 PM PDT Tuesday, April 10, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Afternoon | SSW 25 - 35 | SSW 15 - 25 | SW 15 - 25 | --- - | SW 15 - 25 |
| Tuesday Night | S 15 - 30 | S 15 - 25 | SSW 15 - 25 | --- - | SW 15 - 25 |
| Wednesday Morning | S 25 - 35 | SE 15 - 30 | SE 15 - 25 | --- - | SE 10 - 20 |
| Wednesday Afternoon | SW 10 - 20 | S 10 - 20 | S 10 - 20 | --- - | SSW 10 - 20 |
| Wednesday Night | SW 10 - 20 | WSW 5 - 15 | WSW 10 - 20 | --- - | WSW 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Afternoon | SSW 25 - 35 |
| Tuesday Night | S 15 - 30 |
| Wednesday Morning | S 25 - 35 |
| Wednesday Afternoon | SW 10 - 20 |
| Wednesday Night | SW 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Afternoon | SSW 15 - 25 |
| Tuesday Night | S 15 - 25 |
| Wednesday Morning | SE 15 - 30 |
| Wednesday Afternoon | S 10 - 20 |
| Wednesday Night | WSW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Afternoon | SW 15 - 25 |
| Tuesday Night | SSW 15 - 25 |
| Wednesday Morning | SE 15 - 25 |
| Wednesday Afternoon | S 10 - 20 |
| Wednesday Night | WSW 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Afternoon | SW 15 - 25 |
| Tuesday Night | SW 15 - 25 |
| Wednesday Morning | SE 10 - 20 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Night | WSW 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Afternoon | SSW 25 - 35 |
| Tuesday Night | S 15 - 30 |
| Wednesday Morning | S 25 - 35 |
| Wednesday Afternoon | SW 10 - 20 |
| Wednesday Night | SW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Afternoon | SSW 15 - 25 |
| Tuesday Night | S 15 - 25 |
| Wednesday Morning | SE 15 - 30 |
| Wednesday Afternoon | S 10 - 20 |
| Wednesday Night | WSW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | SW 15 - 25 |
| Tuesday Night | SSW 15 - 25 |
| Wednesday Morning | SE 15 - 25 |
| Wednesday Afternoon | S 10 - 20 |
| Wednesday Night | WSW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Afternoon | SW 15 - 25 |
| Tuesday Night | SW 15 - 25 |
| Wednesday Morning | SE 10 - 20 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday 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 | |
|---|---|---|---|---|---|
| Tuesday Afternoon | SSW 30 - 40 | SW 25 - 35 | SW 30 - 40 | --- - | SW 35 - 45 |
| Tuesday Night | SSW 20 - 30 | SW 20 - 30 | SW 25 - 35 | --- - | SW 30 - 40 |
| Wednesday Morning | S 25 - 35 | S 15 - 25 | SW 20 - 30 | --- - | SW 25 - 35 |
| Wednesday Afternoon | S 25 - 35 | SSE 15 - 25 | SW 25 - 40 | --- - | SW 35 - 50 |
| Wednesday Night | WSW 15 - 25 | W 15 - 25 | WSW 25 - 35 | --- - | W 30 - 40 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Afternoon | SSW 30 - 40 |
| Tuesday Night | SSW 20 - 30 |
| Wednesday Morning | S 25 - 35 |
| Wednesday Afternoon | S 25 - 35 |
| Wednesday Night | WSW 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | SW 25 - 35 |
| Tuesday Night | SW 20 - 30 |
| Wednesday Morning | S 15 - 25 |
| Wednesday Afternoon | SSE 15 - 25 |
| Wednesday Night | W 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Afternoon | SW 30 - 40 |
| Tuesday Night | SW 25 - 35 |
| Wednesday Morning | SW 20 - 30 |
| Wednesday Afternoon | SW 25 - 40 |
| Wednesday Night | WSW 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Afternoon | SW 35 - 45 |
| Tuesday Night | SW 30 - 40 |
| Wednesday Morning | SW 25 - 35 |
| Wednesday Afternoon | SW 35 - 50 |
| Wednesday Night | W 30 - 40 |
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: 3:43 PM PDT Tuesday, April 10, 2018
Extended Weather Synopsis for Saturday night through Saturday
The last in a series of disturbances extending from the NE Pacific upper low will push through on Thursday. With the upper trough overhead, Thursday should be cool and showery, with snowfall accumulating above 3000 ft. Light to moderate snowfall accumulations are possible along the west slopes of the Cascades and Mt. Hood.
Upper level ridging will try to build over the area Thursday night but will quickly be flattened by warm frontal moisture streaming over the area from a developing low pressure system offshore. Forecast models disagree how much moisture will reach the area Thursday night, but by Friday light to moderate rain and snow should be over Washington State.
The frontal boundary will more of less stay over Washington State through Saturday, with less precipitation and moisture expected further south over Mt. Hood. Snow levels should rise somewhat on Friday and stay around those elevations until the front finally sags south later in the weekend.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Thursday | Snow Level | 2500' - 3500' | 2500' - 3500' | 2500' - 3500' | |
| Thursday Night | Snow Level | 3000' - 4000' | 3000' - 4000' | 3000' - 4000' | |
| Friday | Snow Level | 4500' - 5500' | 4500' - 5500' | 4500' - 5500' | |
| Friday Night | Snow Level | 4000' - 5000' | 4000' - 5000' | 5000' - 6000' | |
| Saturday | Snow Level | 4500' - 5500' | 4500' - 5500' | 5000' - 6000' |
| Mt. Baker | Elevation |
|---|---|
| Thursday |
Snow Level 2500' - 3500' |
| Thursday Night |
Snow Level 3000' - 4000' |
| Friday |
Snow Level 4500' - 5500' |
| Friday Night |
Snow Level 4000' - 5000' |
| Saturday |
Snow Level 4500' - 5500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday |
Snow Level 2500' - 3500' |
| Thursday Night |
Snow Level 3000' - 4000' |
| Friday |
Snow Level 4500' - 5500' |
| Friday Night |
Snow Level 4000' - 5000' |
| Saturday |
Snow Level 4500' - 5500' |
| Mt. Hood | Elevation |
|---|---|
| Thursday |
Snow Level 2500' - 3500' |
| Thursday Night |
Snow Level 3000' - 4000' |
| Friday |
Snow Level 4500' - 5500' |
| Friday Night |
Snow Level 5000' - 6000' |
| Saturday |
Snow Level 5000' - 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.
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 10, 2018
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