Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Sunday night through Tuesday
Following a potent windstorm Saturday night, an upper trough will remain over the area Sunday night and Monday morning. Cells of convection are rotating through the trough offshore and some of these have organized into a band of moderate snow that will cross the Cascades during the evening hours and will affect most areas south of Mt. Baker. Another period of enhancement may cross the Cascades during the early morning hours. Decreasing snow showers will generally end by the end of the day on Monday as a shortwave upper-level ridge cuts off the cool, unstable flow. Fair and clearing skies can be expected Monday night. Pass-level winds will shift easterly after midnight and will become moderate with strong gusts by Tuesday morning
A mature low spins some 600 miles off the N. California on Tuesday, spreading light to moderate snow on a southerly flow. The southerly flow will rapidly erode the cooler air previously in place west of the Cascade Crest, but the cold air should remain in place to the east. Light to moderate precipitation will spread into the area, with the heaviest rain and snow along the coast and in the Olympics.
Snow totals Sunday night through the day on Monday are expected in the 10-14" range for Mt. Hood, 8-12" for Paradise, 5-10" for the Central Cascade passes and 2-6" for Crystal, White Pass, and Mt. Baker.
Weather Forecast
Hurricane Ridge
| Sunday Night | Light snow showers heaviest in the evening hours. Moderate and gusty winds. |
| Monday | Light snow showers decreasing and ending during the morning hours. Becoming partly cloudy in the afternoon. Moderate wind becoming light in the afternoon. |
Mt. Baker
| Sunday Night | Light snow showers, potentially moderate in the early morning hours. Moderate winds, increasing. |
| Monday | Light snow showers, moderate in convergence bands. Moderate winds becoming light. |
Washington Pass and Leavenworth
| Sunday Night | Light to occasionally moderate snow early, becoming light snow showers after midnight. Moderate winds. |
| Monday | Light snow showers with bands of occasional moderate snow, decreasing in the afternoon. Moderate winds becoming light in the north. |
Stevens and Snoqualmie Pass
| Sunday Night | Light to moderate snow in the evening hours becoming light snow showers. Moderate winds with strong gusts. |
| Monday | Light snow showers, heavier in isolated convergence bands generally north of Stevens Pass. |
Mt. Rainier, Crystal and White Pass
| Sunday Night | Light to moderate snow. Moderate and gusty winds. |
| Monday | Decreasing light snow showers. Moderate winds becoming light. |
Mt. Hood
| Sunday Night | Moderate snow early becoming light snow showers. Moderate gusty winds. |
| Monday | Light to occasionally moderate snow showers, decreasing and ending by late afternoon. |
Issued: 2:50 PM PST Sunday, January 6, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Evening | Snow Level | 1500' | 1500' | 1000' | 2000' | 1500' | 2000' | 2000' | 2000' |
| Sunday Night | Snow Level | 1000' | 1000' | 500' | 1500' | 1000' | 1000' | 1500' | 1500' |
| Monday Morning | Snow Level | 1000' | 1000' | 0' | 1000' | 1000' | 1000' | 1000' | 1000' |
| Monday Afternoon | Snow Level | 1500' | 1000' | 500' | 1500' | 1000' | 1500' | 1500' | 2000' |
| Monday Evening | Snow Level | 1000' | 500' | 0' | 1000' | 500' | 1000' | 1500' | 2000' |
| Monday Night | Snow Level * | 1500' | 500' | 0' | 500' | 0' | 500' | 1000' | 2000' |
| Tuesday Morning | Snow Level * | 3000' | 500' | 0' | 500' | 500' | 1500' | 2500' | 4000' |
| Tuesday Afternoon | Snow Level * | 4500' | 2500' | 1000' | 500' | 1000' | 2000' | 3000' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening |
Snow Level 1500' |
| Sunday Night |
Snow Level 1000' |
| Monday Morning |
Snow Level 1000' |
| Monday Afternoon |
Snow Level 1500' |
| Monday Evening |
Snow Level 1000' |
| Monday Night |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening |
Snow Level 1500' |
| Sunday Night |
Snow Level 1000' |
| Monday Morning |
Snow Level 1000' |
| Monday Afternoon |
Snow Level 1000' |
| Monday Evening |
Snow Level 500' |
| Monday Night |
Snow Level 500' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 1000' |
| Sunday Night |
Snow Level 500' |
| Monday Morning |
Snow Level 0' |
| Monday Afternoon |
Snow Level 500' |
| Monday Evening |
Snow Level 0' |
| Monday Night |
Snow Level 0' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 0' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2000' |
| Sunday Night |
Snow Level 1500' |
| Monday Morning |
Snow Level 1000' |
| Monday Afternoon |
Snow Level 1500' |
| Monday Evening |
Snow Level 1000' |
| Monday Night |
Snow Level 500' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 1500' |
| Sunday Night |
Snow Level 1000' |
| Monday Morning |
Snow Level 1000' |
| Monday Afternoon |
Snow Level 1000' |
| Monday Evening |
Snow Level 500' |
| Monday Night |
Snow Level 0' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2000' |
| Sunday Night |
Snow Level 1000' |
| Monday Morning |
Snow Level 1000' |
| Monday Afternoon |
Snow Level 1500' |
| Monday Evening |
Snow Level 1000' |
| Monday Night |
Snow Level 500' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 2000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2000' |
| Sunday Night |
Snow Level 1500' |
| Monday Morning |
Snow Level 1000' |
| Monday Afternoon |
Snow Level 1500' |
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 2500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2000' |
| Sunday Night |
Snow Level 1500' |
| Monday Morning |
Snow Level 1000' |
| Monday Afternoon |
Snow Level 2000' |
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 2000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 4000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 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.
Precipitation Forecast
| Sunday Night | Tuesday | Tuesday Night | Tuesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0.25 | LT 0.10 | 0 | 0.25 |
| Mt Baker Ski Area | 0.25 | LT 0.25 | 0 | LT 0.25 |
| Washington Pass | LT 0.10 | LT 0.10 | 0 | LT 0.10 |
| Leavenworth | LT 0.10 | 0 | 0 | LT 0.25 |
| Stevens Pass | 0.50 | LT 0.25 | 0 | 0.25 |
| Snoqualmie Pass | 0.50 - 0.75 | LT 0.25 | 0 | 0.25 |
| Mission Ridge | LT 0.25 | LT 0.10 | 0 | LT 0.25 |
| Crystal Mt | 0.25 | LT 0.10 | 0 | 0.50 |
| Paradise | 0.75 | 0.25 | 0 | 0.50 - 0.75 |
| White Pass | 0.25 - 0.50 | LT 0.25 | 0 | 0.25 |
| Mt Hood Meadows | 0.75 | 0.50 | LT 0.10 | 0.50 |
| Timberline | 0.75 | 0.50 | LT 0.10 | 0.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 |
| Tuesday | LT 0.25 |
| Tuesday Night | 0 |
| Tuesday | LT 0.25 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | LT 0.25 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0.50 |
| Tuesday | LT 0.25 |
| Tuesday Night | 0 |
| Tuesday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0.50 - 0.75 |
| Tuesday | LT 0.25 |
| Tuesday Night | 0 |
| Tuesday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | LT 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | 0.50 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday Night | 0.75 |
| Tuesday | 0.25 |
| Tuesday Night | 0 |
| Tuesday | 0.50 - 0.75 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 - 0.50 |
| Tuesday | LT 0.25 |
| Tuesday Night | 0 |
| Tuesday | 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday Night | 0.75 |
| Tuesday | 0.50 |
| Tuesday Night | LT 0.10 |
| Tuesday | 0.50 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday Night | 0.75 |
| Tuesday | 0.50 |
| Tuesday Night | LT 0.10 |
| Tuesday | 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: 2:50 PM PST Sunday, January 6, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | WSW 15 - 25 | SW 5 - 15 | WSW 5 - 15 | WSW 10 - 20 | WSW 25 - 35 |
| Sunday Night | W 20 - 30 | SW 15 - 25 | WSW 15 - 25 | WSW 15 - 25 | WSW 25 - 35 |
| Monday Morning | WSW 15 - 25 | WSW 10 - 20 | WSW 15 - 25 | WSW 10 - 20 | WSW 15 - 25 |
| Monday Afternoon | W 5 - 15 | SW 5 - 15 | W 10 - 20 | WSW 5 - 15 | SSW 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening | WSW 15 - 25 |
| Sunday Night | W 20 - 30 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | W 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening | SW 5 - 15 |
| Sunday Night | SW 15 - 25 |
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | WSW 5 - 15 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | W 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | WSW 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | WSW 25 - 35 |
| Sunday Night | WSW 25 - 35 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | SSW 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Evening | WSW 15 - 25 |
| Sunday Night | W 20 - 30 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | W 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | SW 5 - 15 |
| Sunday Night | SW 15 - 25 |
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | WSW 5 - 15 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | WSW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | WSW 25 - 35 |
| Sunday Night | WSW 25 - 35 |
| Monday Morning | WSW 15 - 25 |
| Monday Afternoon | SSW 5 - 15 |
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 | |
|---|---|---|---|---|---|
| Sunday Evening | WSW 15 - 25 | WSW 10 - 20 | W 10 - 20 | W 20 - 30 | W 35 - 50 |
| Sunday Night | WSW 25 - 35 | WSW 35 - 50 | W 30 - 45 | W 30 - 45 | W 30 - 45 |
| Monday Morning | WSW 25 - 35 | WSW 35 - 50 | WSW 30 - 45 | WSW 30 - 45 | WSW 30 - 45 |
| Monday Afternoon | WSW 15 - 25 | WSW 20 - 30 | W 25 - 35 | W 25 - 35 | WSW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | WSW 15 - 25 |
| Sunday Night | WSW 25 - 35 |
| Monday Morning | WSW 25 - 35 |
| Monday Afternoon | WSW 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | WSW 35 - 50 |
| Monday Morning | WSW 35 - 50 |
| Monday Afternoon | WSW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | W 10 - 20 |
| Sunday Night | W 30 - 45 |
| Monday Morning | WSW 30 - 45 |
| Monday Afternoon | W 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | W 20 - 30 |
| Sunday Night | W 30 - 45 |
| Monday Morning | WSW 30 - 45 |
| Monday Afternoon | W 25 - 35 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | W 35 - 50 |
| Sunday Night | W 30 - 45 |
| Monday Morning | WSW 30 - 45 |
| Monday Afternoon | WSW 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: 2:50 PM PST Sunday, January 6, 2019
Extended Weather Synopsis for Tuesday night through Tuesday
Waves of (plentiful) moisture will move through the Pacific Northwest as the mature and weakening low tracks NE toward the central British Columbia coastline. Elevated snow levels will be the rule west of the Cascade Crest Tuesday night through the day on Wednesday with the strong easterly flow generally lowering snow levels at the Cascade Passes. Pressure gradients should slacken Wednesday night, assuring a shift to rain at the lower passes if it doesn't occur earlier.
The heaviest waves of precipitation will likely occur late Wednesday through the day on Thursday. A warm front is likely to move across the region from south to north during the day on Thursday.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Night | Snow Level | 3000' - 4000' | 2500' - 3500' | 4000' - 5000' | |
| Wednesday | Snow Level | 4000' - 5000' | 3000' - 4000' | 4000' - 5000' | |
| Wednesday Night | Snow Level | 3500' - 4500' | 3500' - 4500' | 4500' - 5500' | |
| Thursday | Snow Level | 4000' - 5000' | 4500' - 5500' | 5000' - 6000' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 4000' - 5000' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday |
Snow Level 4000' - 5000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night |
Snow Level 2500' - 3500' |
| Wednesday |
Snow Level 3000' - 4000' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday |
Snow Level 4500' - 5500' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night |
Snow Level 4000' - 5000' |
| Wednesday |
Snow Level 4000' - 5000' |
| Wednesday Night |
Snow Level 4500' - 5500' |
| Thursday |
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 Jan 6, 2019
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