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 Monday
Very light post-frontal showers decrease and generally end as SW flow continues behind a departed short-wave trough. Friday night with relatively mild with snow levels around 3000-4000 feet. A trough will approach from the SW as it digs into northern California, spreading some light precipitation into the Olympics in the early morning hours.
The main portion of the trough will move into the near-shore waters with light rain and snow brushing the coastline by the end of the day on Saturday.
Saturday night, the surface trough crosses the region, bringing a brief shot of strong westerly winds and moderate to locally heavy precipitation behind it, impacting Mt. Hood in the late evening and the Washington Cascades after midnight. At Snoqualmie Pass, precipitation will be a mix of rain and snow with east winds initially keeping temperatures cool, changing back to rain as the trough pushes westerly winds through and then rapid cooling changes precipitation back to snow behind the trough by Sunday morning. Snow shower activity appears initially poorly organized under the upper-level trough on Sunday with light to moderate winds.
Weather Forecast
Hurricane Ridge
| Friday Night | Mostly cloudy with a chance of very light snow showers. Moderate southerly winds. |
| Saturday | Cloudy in the morning with light snow developing in the afternoon. Moderate southerly wind. |
Mt. Baker
| Friday Night | Light snow showers. Moderate wind. |
| Saturday | Mostly cloudy with a mix of low and high clouds. Moderate southerly winds. |
Washington Pass and Leavenworth
| Friday Night | Very light snow showers. Moderate wind. |
| Saturday | Partly cloudy. Light to moderate wind. |
Stevens and Snoqualmie Pass
| Friday Night | Mostly cloudy with a slight chance of snow showers. Gradually increasing light E flow. |
| Saturday | Mostly cloudy with a chance of very light snow by evening. Moderate E flow peaking mid-day. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Mostly cloudy with a slight chance of snow showers. Light winds. |
| Saturday | Mostly cloudy with light snow arriving late in the day. Moderate E wind developing. |
Mt. Hood
| Friday Night | Chance of very light snow showers. Increasing moderate winds. |
| Saturday | Mostly cloudy with a chance of light snow late in the day. Increasing moderate winds, gusting strong. |
Issued: 2:57 PM PST Friday, January 4, 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 * | 3500' | 3500' | 3500' | 4000' | 4000' | 4000' | 4000' | 5000' |
| Friday Night | Snow Level * | 4000' | 3000' | 2500' | 3500' | 3500' | 3500' | 4000' | 5500' |
| Saturday Morning | Snow Level * | 4500' | 3500' | 2500' | 2500' | 3000' | 4000' | 4000' | 5000' |
| Saturday Afternoon | Snow Level * | 4500' | 4500' | 3500' | 3000' | 3500' | 4000' | 4000' | 5000' |
| Saturday Evening | Snow Level * | 4500' | 4000' | 3000' | 2500' | 3000' | 3500' | 3500' | 4500' |
| Saturday Night | Snow Level | 3000' | 3000' | 2500' | 2500' | 2500' | 3000' | 3000' | 3500' |
| Sunday Morning | Snow Level | 2000' | 2500' | 2000' | 2000' | 2000' | 2000' | 2000' | 2500' |
| Sunday Afternoon | Snow Level | 2000' | 1500' | 1500' | 2000' | 2000' | 2000' | 2000' | 2000' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' (Easterly Flow *) |
| Friday Night |
Snow Level 4000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 4500' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Saturday Evening |
Snow Level 4500' (Easterly Flow *) |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' (Easterly Flow *) |
| Friday Night |
Snow Level 3000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 3500' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Saturday Evening |
Snow Level 4000' (Easterly Flow *) |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 2500' |
| Sunday Afternoon |
Snow Level 1500' |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' (Easterly Flow *) |
| Friday Night |
Snow Level 2500' (Easterly Flow *) |
| Saturday Morning |
Snow Level 2500' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Saturday Evening |
Snow Level 3000' (Easterly Flow *) |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 1500' |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' (Easterly Flow *) |
| Friday Night |
Snow Level 3500' (Easterly Flow *) |
| Saturday Morning |
Snow Level 2500' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Saturday Evening |
Snow Level 2500' (Easterly Flow *) |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' (Easterly Flow *) |
| Friday Night |
Snow Level 3500' (Easterly Flow *) |
| Saturday Morning |
Snow Level 3000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Saturday Evening |
Snow Level 3000' (Easterly Flow *) |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' (Easterly Flow *) |
| Friday Night |
Snow Level 3500' (Easterly Flow *) |
| Saturday Morning |
Snow Level 4000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Saturday Evening |
Snow Level 3500' (Easterly Flow *) |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' (Easterly Flow *) |
| Friday Night |
Snow Level 4000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 4000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Saturday Evening |
Snow Level 3500' (Easterly Flow *) |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Snow Level 5000' (Easterly Flow *) |
| Friday Night |
Snow Level 5500' (Easterly Flow *) |
| Saturday Morning |
Snow Level 5000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Saturday Evening |
Snow Level 4500' (Easterly Flow *) |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Snow Level 2500' |
| Sunday Afternoon |
Snow Level 2000' |
* 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 | Monday | Monday Night | Monday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | LT 0.10 | 0.25 - 0.50 | 0.25 - 0.50 |
| Mt Baker Ski Area | LT 0.10 | 0 | 1.00 | 0.50 - 0.75 |
| Washington Pass | LT 0.10 | 0 | 0.25 | LT 0.25 |
| Leavenworth | 0 | 0 | 0.25 | LT 0.10 |
| Stevens Pass | 0 | 0 | 0.25 | LT 0.25 |
| Snoqualmie Pass | 0 | 0 | 0.25 | 0.25 |
| Mission Ridge | 0 | 0 | 0.25 | LT 0.10 |
| Crystal Mt | 0 | LT 0.10 | 0.50 | 0.25 |
| Paradise | LT 0.10 | LT 0.10 | 0.75 | 0.50 |
| White Pass | 0 | LT 0.10 | 0.50 | 0.25 |
| Mt Hood Meadows | 0 | LT 0.10 | 0.75 | 0.25 - 0.50 |
| Timberline | 0 | LT 0.10 | 0.75 | 0.25 - 0.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | LT 0.10 |
| Monday Night | 0.25 - 0.50 |
| Monday | 0.25 - 0.50 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 1.00 |
| Monday | 0.50 - 0.75 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0.25 |
| Monday | LT 0.25 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0.25 |
| Monday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0.25 |
| Monday | LT 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0.25 |
| Monday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0.25 |
| Monday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | 0.50 |
| Monday | 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | LT 0.10 |
| Monday Night | 0.75 |
| Monday | 0.50 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | 0.50 |
| Monday | 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | 0.75 |
| Monday | 0.25 - 0.50 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | 0.75 |
| Monday | 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: 2:57 PM PST Friday, January 4, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | SE 5 - 15 | SSE 10 - 20 | ESE 5 - 15 | ESE 5 - 15 | ESE 10 - 20 |
| Friday Night | SE 20 - 30 | E 10 - 20 | E 10 - 20 | E 10 - 20 | E 15 - 25 |
| Saturday Morning | SE 15 - 25 | E 10 - 20 | E 15 - 25 | E 15 - 25 | SE 20 - 30 |
| Saturday Afternoon | SSE 25 - 35 | E 10 - 20 | E 15 - 25 | E 20 - 30 | ESE 25 - 35 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | SE 5 - 15 |
| Friday Night | SE 20 - 30 |
| Saturday Morning | SE 15 - 25 |
| Saturday Afternoon | SSE 25 - 35 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | SSE 10 - 20 |
| Friday Night | E 10 - 20 |
| Saturday Morning | E 10 - 20 |
| Saturday Afternoon | E 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | ESE 5 - 15 |
| Friday Night | E 10 - 20 |
| Saturday Morning | E 15 - 25 |
| Saturday Afternoon | E 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | ESE 5 - 15 |
| Friday Night | E 10 - 20 |
| Saturday Morning | E 15 - 25 |
| Saturday Afternoon | E 20 - 30 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | ESE 10 - 20 |
| Friday Night | E 15 - 25 |
| Saturday Morning | SE 20 - 30 |
| Saturday Afternoon | ESE 25 - 35 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | SE 5 - 15 |
| Friday Night | SE 20 - 30 |
| Saturday Morning | SE 15 - 25 |
| Saturday Afternoon | SSE 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SSE 10 - 20 |
| Friday Night | E 10 - 20 |
| Saturday Morning | E 10 - 20 |
| Saturday Afternoon | E 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | ESE 5 - 15 |
| Friday Night | E 10 - 20 |
| Saturday Morning | E 15 - 25 |
| Saturday Afternoon | E 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | ESE 5 - 15 |
| Friday Night | E 10 - 20 |
| Saturday Morning | E 15 - 25 |
| Saturday Afternoon | E 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | ESE 10 - 20 |
| Friday Night | E 15 - 25 |
| Saturday Morning | SE 20 - 30 |
| Saturday Afternoon | ESE 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 | SW 15 - 25 | SW 15 - 25 | SSW 20 - 30 | SSW 20 - 30 | S 25 - 35 |
| Friday Night | S 25 - 35 | S 15 - 25 | S 20 - 30 | SSE 25 - 35 | SSE 25 - 35 |
| Saturday Morning | SSE 20 - 30 | SSE 30 - 45 | S 35 - 50 | S 35 - 50 | S 30 - 45 |
| Saturday Afternoon | SSE 25 - 35 | SSE 35 - 50 | S 35 - 50 | S 40 - 60 | SSE 50 - 70 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SW 15 - 25 |
| Friday Night | S 25 - 35 |
| Saturday Morning | SSE 20 - 30 |
| Saturday Afternoon | SSE 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | SW 15 - 25 |
| Friday Night | S 15 - 25 |
| Saturday Morning | SSE 30 - 45 |
| Saturday Afternoon | SSE 35 - 50 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | SSW 20 - 30 |
| Friday Night | S 20 - 30 |
| Saturday Morning | S 35 - 50 |
| Saturday Afternoon | S 35 - 50 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | SSW 20 - 30 |
| Friday Night | SSE 25 - 35 |
| Saturday Morning | S 35 - 50 |
| Saturday Afternoon | S 40 - 60 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | S 25 - 35 |
| Friday Night | SSE 25 - 35 |
| Saturday Morning | S 30 - 45 |
| Saturday Afternoon | SSE 50 - 70 |
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: 2:57 PM PST Friday, January 4, 2019
Extended Weather Synopsis for Monday night through Monday
A trough will be centered on the region Sunday night, featuring cold air and light to moderate snow showers and a shift to NW flow after midnight as the trough slides eastward. Light to moderate snow showers, mostly west of the Cascade Crest, will decrease during the day on Monday.
Skies clear in most locations Monday evening and easterly winds pick up ahead of a deep and expansive low-pressure center.
Rain and snow will arrive Tuesday morning and become moderate to heavy in some locations as southerly flow likely focuses the precipitation on the volcanoes. Easterly flow also intensifies as the low approaches and gradually warms the air aloft.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Snow Level | 500' - 1500' | 500' - 1500' | 1000' - 2000' | |
| Monday | Snow Level | 500' - 1500' | 500' - 1500' | 1000' - 2000' | |
| Monday Night | Snow Level | 0' - 1000' | 0' - 1000' | 1500' - 2500' | * |
| Tuesday | Snow Level | 1000' - 2000' | 1000' - 2000' | 2500' - 4500' | * |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Snow Level 500' - 1500' |
| Monday |
Snow Level 500' - 1500' |
| Monday Night |
Snow Level 0' - 1000' (Easterly Flow *) |
| Tuesday |
Snow Level 1000' - 2000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Snow Level 500' - 1500' |
| Monday |
Snow Level 500' - 1500' |
| Monday Night |
Snow Level 0' - 1000' (Easterly Flow *) |
| Tuesday |
Snow Level 1000' - 2000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Snow Level 1000' - 2000' |
| Monday |
Snow Level 1000' - 2000' |
| Monday Night |
Snow Level 1500' - 2500' (Easterly Flow *) |
| Tuesday |
Snow Level 2500' - 4500' (Easterly Flow *) |
* 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 Jan 4, 2019
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