Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Friday night through Thursday
An upper trough is sliding down the coast of British Columbia on Friday night, bringing rapidly cooling temperatures, increasing winds, and a chance of light snowfall through the day on Saturday. The sharp boundary between the cooler air to the north and the warmer air to the south will drive the moderate westerly winds, which will increase Friday evening and remain elevated in many areas through the day on Saturday. Periods of light rain and snow are expected to transition to mainly snow down to Snoqualmie Pass level as precipitation develops over the North Cascades and spreads southward. The light snow should continue to shift southward on Saturday, with some local enhancement in areas of convergence possible from the Mountain Loop to Snoqualmie Pass. Throughout the west slopes of the Cascades, up to several inches of snow are expected with daytime warming making it difficult for snow to stick on paved surfaces.
The Pacific Northwest sits near the western edge of the broad trough through Sunday. Saturday night, the energy associated with the trough exits to the east, replaced with a light and drier N flow, ending the light snow flurry activity. Skies should clear in many areas allowing for radiational cooling to combine with the cool air mass to bring below-freezing temperatures to most mountain locations.
Sunday should be mostly clear and cool in the morning with rebounding temperatures by afternoon and clouds or light rain/snow showers developing in the afternoon.
Weather Forecast
Hurricane Ridge
| Friday Night | Partly cloudy. Cooling temperatures. Moderate winds. |
| Saturday | Mostly cloudy with a slight chance of light snow in the morning. Moderate winds. |
Mt. Baker
| Friday Night | Increasing clouds, particularly after midnight with increasing light rain and snow transitioning to all snow. Increasing moderate winds. Falling temperatures. |
| Saturday | Cloudy with periods of light snow in the morning. Moderate winds. Cool temperatures. |
Washington Pass and Leavenworth
| Friday Night | Mostly clear with increasing clouds after midnight with increasing light rain and snow near the Cascade Crest transitioning to all snow. Increasing moderate winds. Falling temperatures. |
| Saturday | Cloudy with periods of light snow near the Cascade Crest. Moderate winds. Cool temperatures. |
Stevens and Snoqualmie Pass
| Friday Night | Mostly clear early with increasing clouds and then light rain and snow developing by morning. Light to moderate winds at 5000 ft and increasing light W winds through the passes. Falling temperatures. |
| Saturday | Cloudy with periods of light snow, slightly enhanced with weak zones of convergence. Light to moderate W winds at pass level and 5000 ft. Cool temperatures. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Mostly clear early with increasing clouds and then sprinkles or snow flurries developing by morning. Light to moderate winds at 5000 ft. Falling temperatures. |
| Saturday | Cloudy with periods of light snow, mainly in the afternoon. Light to moderate winds. Cool temperatures. |
Mt. Hood
| Friday Night | Mild and mostly clear early with increasing clouds after midnight. Moderate winds gusting strong. Falling temperatures. |
| Saturday | Cloudy with a chance of snow flurries. Increasing moderate to occasionally strong winds. Cool temperatures. |
Issued: 3:23 PM PDT Friday, April 26, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Evening | Snow Level | 4500' | 5000' | 5500' | 6000' | 5500' | 5500' | 6000' | 7000' |
| Friday Night | Snow Level | 3500' | 3000' | 3000' | 4000' | 3500' | 3500' | 4000' | 5500' |
| Saturday Morning | Snow Level | 2500' | 2500' | 3000' | 3000' | 3000' | 2500' | 3000' | 3500' |
| Saturday Afternoon | Snow Level | 3000' | 2500' | 3500' | 3000' | 3000' | 3000' | 3000' | 3500' |
| Saturday Evening | Snow Level | 3500' | 3000' | 3500' | 3500' | 3000' | 3000' | 3000' | 3500' |
| Saturday Night | Snow Level | 3500' | 2000' | 2500' | 2500' | 2000' | 2000' | 2000' | 2000' |
| Sunday Morning | Freezing Level | 4500' | 3500' | 3500' | 3500' | 3500' | 3000' | 3500' | 3500' |
| Sunday Afternoon | Freezing Level | 5000' | 5000' | 5500' | 5000' | 5000' | 5000' | 5500' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Snow Level 4500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Evening |
Snow Level 3500' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 5000' |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Snow Level 5000' |
| Friday Night |
Snow Level 3000' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' |
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Freezing Level 3500' |
| Sunday Afternoon |
Freezing Level 5000' |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 5500' |
| Friday Night |
Snow Level 3000' |
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 3500' |
| Saturday Evening |
Snow Level 3500' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Freezing Level 3500' |
| Sunday Afternoon |
Freezing Level 5500' |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Snow Level 6000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Evening |
Snow Level 3500' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Freezing Level 3500' |
| Sunday Afternoon |
Freezing Level 5000' |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 5500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Freezing Level 3500' |
| Sunday Afternoon |
Freezing Level 5000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 5500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Freezing Level 3000' |
| Sunday Afternoon |
Freezing Level 5000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Snow Level 6000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Freezing Level 3500' |
| Sunday Afternoon |
Freezing Level 5500' |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Snow Level 7000' |
| Friday Night |
Snow Level 5500' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 3500' |
| Saturday Evening |
Snow Level 3500' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Freezing Level 3500' |
| Sunday Afternoon |
Freezing Level 5000' |
* 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 Night | Thursday | Thursday Night | Thursday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | 0 | 0 |
| Mt Baker Ski Area | LT 0.25 | LT 0.25 | 0 | 0 |
| Washington Pass | 0 | LT 0.10 | LT 0.10 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | LT 0.10 | LT 0.25 | 0 | LT 0.10 |
| Snoqualmie Pass | LT 0.10 | LT 0.25 | 0 | LT 0.10 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | 0 | LT 0.10 | 0 | LT 0.10 |
| Paradise | 0 | LT 0.10 | LT 0.10 | LT 0.10 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | LT 0.10 | 0 | 0 |
| Timberline | 0 | LT 0.10 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Thursday | LT 0.25 |
| Thursday Night | 0 |
| Thursday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | LT 0.10 |
| Thursday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Thursday | LT 0.25 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Thursday | LT 0.25 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
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: 3:23 PM PDT Friday, April 26, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | WSW 20 - 30 | SSW 15 - 25 | W 10 - 20 | WSW 10 - 20 | W 20 - 30 |
| Friday Night | W 15 - 25 | SW 15 - 25 | W 10 - 20 | W 10 - 20 | W 20 - 30 |
| Saturday Morning | W 15 - 25 | W 10 - 20 | W 15 - 25 | W 15 - 25 | W 20 - 30 |
| Saturday Afternoon | WNW 10 - 20 | W 5 - 15 | WNW 20 - 30 | W 10 - 20 | W 25 - 35 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | WSW 20 - 30 |
| Friday Night | W 15 - 25 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | WNW 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | SSW 15 - 25 |
| Friday Night | SW 15 - 25 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | W 10 - 20 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | WNW 20 - 30 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | WSW 10 - 20 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | W 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | W 20 - 30 |
| Friday Night | W 20 - 30 |
| Saturday Morning | W 20 - 30 |
| Saturday Afternoon | W 25 - 35 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | WSW 20 - 30 |
| Friday Night | W 15 - 25 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | WNW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SSW 15 - 25 |
| Friday Night | SW 15 - 25 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | W 10 - 20 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | WNW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | WSW 10 - 20 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | W 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | W 20 - 30 |
| Friday Night | W 20 - 30 |
| Saturday Morning | W 20 - 30 |
| Saturday Afternoon | 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | WSW 25 - 35 | WSW 40 - 60 | W 35 - 50 | W 40 - 60 | W 25 - 35 |
| Friday Night | WSW 25 - 35 | WSW 40 - 60 | W 40 - 60 | W 45 - 65 | W 30 - 45 |
| Saturday Morning | W 20 - 30 | W 25 - 35 | W 30 - 45 | W 40 - 60 | W 45 - 65 |
| Saturday Afternoon | NW 10 - 20 | WNW 20 - 30 | WNW 30 - 45 | W 25 - 35 | W 40 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | WSW 25 - 35 |
| Friday Night | WSW 25 - 35 |
| Saturday Morning | W 20 - 30 |
| Saturday Afternoon | NW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | WSW 40 - 60 |
| Friday Night | WSW 40 - 60 |
| Saturday Morning | W 25 - 35 |
| Saturday Afternoon | WNW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | W 35 - 50 |
| Friday Night | W 40 - 60 |
| Saturday Morning | W 30 - 45 |
| Saturday Afternoon | WNW 30 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | W 40 - 60 |
| Friday Night | W 45 - 65 |
| Saturday Morning | W 40 - 60 |
| Saturday Afternoon | W 25 - 35 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | W 25 - 35 |
| Friday Night | W 30 - 45 |
| Saturday Morning | W 45 - 65 |
| Saturday Afternoon | W 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: 3:23 PM PDT Friday, April 26, 2019
Extended Weather Synopsis for Thursday night through Thursday
Expect near-normal temperatures and typical spring-like weather throughout the period. Sunday night should see little change in the pattern with clearing skies. On Monday, the broad trough digs slightly into the region, touching off more shower activity in the afternoon and evening. On Monday night and Tuesday, the trough shifts eastward, reducing the potential for afternoon convective showers.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Freezing Level | 4500' - 6000' | 4500' - 6000' | 5000' - 6000' | |
| Monday | Freezing Level | 5500' - 6000' | 4500' - 5500' | 4500' - 6000' | |
| Monday Night | Freezing Level | 4500' - 6000' | 4500' - 6000' | 5000' - 6500' | |
| Tuesday | Freezing Level | 4000' - 6000' | 4000' - 6000' | 4000' - 6000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Freezing Level 4500' - 6000' |
| Monday |
Freezing Level 5500' - 6000' |
| Monday Night |
Freezing Level 4500' - 6000' |
| Tuesday |
Freezing Level 4000' - 6000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Freezing Level 4500' - 6000' |
| Monday |
Freezing Level 4500' - 5500' |
| Monday Night |
Freezing Level 4500' - 6000' |
| Tuesday |
Freezing Level 4000' - 6000' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Freezing Level 5000' - 6000' |
| Monday |
Freezing Level 4500' - 6000' |
| Monday Night |
Freezing Level 5000' - 6500' |
| Tuesday |
Freezing Level 4000' - 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 26, 2019
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