Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Saturday night through Thursday
A weak trough associated with a primary low pressure near the California/Oregon border brought light snow to areas west of the Cascade Crest above 4000-4500 ft with light E flow keeping the Cascade Passes cool enough for some wet, accumulating snowfall. The light rain and snow shower activity should gradually diminish during the evening hours on Saturday with a shift to W flow likely to change Snoqualmie Pass to rain. The locations of precipitation are difficult to forecast due to the disorganized nature of the system, but models suggest some weak convergence activity in the central Cascades. The trough axis shifts eastward overnight as a large ridge begins encroaching upon our region. This will bring a drying trend with a shift to a more northerly flow after midnight, cutting off most of the light rain and snow shower activity.
Expect weak winds to allow low clouds and potentially light drizzle to linger in some areas west of the Cascade Crest on Sunday, with fairer weather at high elevations and east of the Cascade Crest. Sunday night and Monday, expect mostly clear and fair weather with spatial extent of low clouds and fog possible gradually diminishing as the ridge axis drifts to our coastline by late Monday. Expect freezing levels to rise significantly, particularly west of the Cascade Crest. However, E flow may keep the Passes slightly cooler than areas further west.
Weather Forecast
Hurricane Ridge
| Saturday Night | Light rain and snow ending during the early evening hours. Then becoming partly cloudy. |
| Sunday | Low clouds lingering with clear skies likely at higher elevations. |
Mt. Baker
| Saturday Night | Light rain and snow ending during the early evening hours. Then becoming mostly cloudy. |
| Sunday | Low clouds lingering in the morning then clearing skies. |
Washington Pass and Leavenworth
| Saturday Night | Partly cloudy with a chance of rain or snow showers early, then becoming mostly clear. |
| Sunday | Mostly clear. |
Stevens and Snoqualmie Pass
| Saturday Night | Light rain and snow during the evening hours, locally more intense in weak convergence. Becoming mostly cloudy after midnight. Light E wind shifting W during the evening hours, leading to rising snow levels above Snoqualmie to near Stevens Pass level. |
| Sunday | Low clouds lingering near and west of the Passes, with partial clearing at Stevens during the afternoon. |
Mt. Rainier, Crystal and White Pass
| Saturday Night | Very light rain and snow showers during the evening hours. Then becoming mostly cloudy. |
| Sunday | Low clouds lingering with mostly clear skies at elevation. More sun likely for Crystal and White Pass during the afternoon. |
Mt. Hood
| Saturday Night | Light rain and snow showers ending during the evening hours. Becoming partly cloudy after midnight. |
| Sunday | Low clouds lingering with mostly clear skies at elevation. |
Issued: 2:52 PM PST Saturday, December 7, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Evening | Snow Level | 4000' | 4000' | 4000' | 3500' | 3500' | 3500' | 4000' | 5000' |
| Saturday Night | Snow Level | 4000' | 3500' | 3500' | 4000' | 4000' | 4000' | 4000' | 4500' |
| Sunday Morning | Freezing Level | 5000' | 4500' | 4500' | 5000' | 4500' | 4500' | 5000' | 5000' |
| Sunday Afternoon | Freezing Level | 5000' | 4500' | 4500' | 5000' | 4500' | 4500' | 5000' | 5000' |
| Sunday Evening | Freezing Level | 5000' | 4000' | 3000' | 3500' | 4000' | 4500' | 4000' | 5000' |
| Sunday Night | Freezing Level * | 5500' | 3000' | 3500' | 4000' | 3500' | 4000' | 3500' | 4500' |
| Monday Morning | Freezing Level * | 6500' | 5000' | 5000' | 5000' | 5000' | 5500' | 6000' | 7000' |
| Monday Afternoon | Freezing Level * | 8000' | 6000' | 6000' | 6000' | 6000' | 6000' | 6000' | 6000' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 4000' |
| Sunday Morning |
Freezing Level 5000' |
| Sunday Afternoon |
Freezing Level 5000' |
| Sunday Evening |
Freezing Level 5000' |
| Sunday Night |
Freezing Level 5500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 6500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 4500' |
| Sunday Evening |
Freezing Level 4000' |
| Sunday Night |
Freezing Level 3000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 4500' |
| Sunday Evening |
Freezing Level 3000' |
| Sunday Night |
Freezing Level 3500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3500' |
| Saturday Night |
Snow Level 4000' |
| Sunday Morning |
Freezing Level 5000' |
| Sunday Afternoon |
Freezing Level 5000' |
| Sunday Evening |
Freezing Level 3500' |
| Sunday Night |
Freezing Level 4000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3500' |
| Saturday Night |
Snow Level 4000' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 4500' |
| Sunday Evening |
Freezing Level 4000' |
| Sunday Night |
Freezing Level 3500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3500' |
| Saturday Night |
Snow Level 4000' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 4500' |
| Sunday Evening |
Freezing Level 4500' |
| Sunday Night |
Freezing Level 4000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 4000' |
| Sunday Morning |
Freezing Level 5000' |
| Sunday Afternoon |
Freezing Level 5000' |
| Sunday Evening |
Freezing Level 4000' |
| Sunday Night |
Freezing Level 3500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening |
Snow Level 5000' |
| Saturday Night |
Snow Level 4500' |
| Sunday Morning |
Freezing Level 5000' |
| Sunday Afternoon |
Freezing Level 5000' |
| Sunday Evening |
Freezing Level 5000' |
| Sunday Night |
Freezing Level 4500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 7000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6000' (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
| Saturday Night | Thursday | Thursday Night | Thursday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | 0 | 0 | 0 |
| Mt Baker Ski Area | LT 0.10 | 0 | 0 | 0 |
| Washington Pass | LT 0.10 | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | LT 0.25 | 0 | 0 | 0 |
| Snoqualmie Pass | LT 0.10 | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | LT 0.10 | 0 | 0 | 0 |
| Paradise | 0 | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | LT 0.10 | 0 | 0 | 0 |
| Timberline | LT 0.10 | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.25 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | 0 |
| 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: 2:52 PM PST Saturday, December 7, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Evening | NNW 0 - 10 | W 0 - 10 | W 0 - 10 | W 0 - 10 | W 0 - 10 |
| Saturday Night | NW 0 - 10 | NW 0 - 10 | WNW 5 - 15 | W 0 - 10 | W 5 - 15 |
| Sunday Morning | W 0 - 10 | N 0 - 10 | WNW 5 - 15 | WNW 0 - 10 | WNW 10 - 20 |
| Sunday Afternoon | WSW 0 - 10 | WSW 0 - 10 | WNW 5 - 15 | WNW 0 - 10 | WNW 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening | NNW 0 - 10 |
| Saturday Night | NW 0 - 10 |
| Sunday Morning | W 0 - 10 |
| Sunday Afternoon | WSW 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening | W 0 - 10 |
| Saturday Night | NW 0 - 10 |
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | WSW 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening | W 0 - 10 |
| Saturday Night | WNW 5 - 15 |
| Sunday Morning | WNW 5 - 15 |
| Sunday Afternoon | WNW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Evening | W 0 - 10 |
| Saturday Night | W 0 - 10 |
| Sunday Morning | WNW 0 - 10 |
| Sunday Afternoon | WNW 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening | W 0 - 10 |
| Saturday Night | W 5 - 15 |
| Sunday Morning | WNW 10 - 20 |
| Sunday Afternoon | WNW 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Evening | NNW 0 - 10 |
| Saturday Night | NW 0 - 10 |
| Sunday Morning | W 0 - 10 |
| Sunday Afternoon | WSW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | W 0 - 10 |
| Saturday Night | NW 0 - 10 |
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | WSW 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | W 0 - 10 |
| Saturday Night | WNW 5 - 15 |
| Sunday Morning | WNW 5 - 15 |
| Sunday Afternoon | WNW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | W 0 - 10 |
| Saturday Night | W 0 - 10 |
| Sunday Morning | WNW 0 - 10 |
| Sunday Afternoon | WNW 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | W 0 - 10 |
| Saturday Night | W 5 - 15 |
| Sunday Morning | WNW 10 - 20 |
| Sunday Afternoon | WNW 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 | |
|---|---|---|---|---|---|
| Saturday Evening | WNW 5 - 15 | WNW 5 - 15 | WNW 10 - 20 | W 10 - 20 | WSW 10 - 20 |
| Saturday Night | NW 5 - 15 | NW 10 - 20 | NW 15 - 25 | NW 10 - 20 | NW 15 - 25 |
| Sunday Morning | NNW 15 - 25 | NNW 15 - 25 | NNW 25 - 35 | NNW 15 - 25 | NNW 15 - 25 |
| Sunday Afternoon | NNW 10 - 20 | NNW 15 - 25 | NNW 10 - 20 | NNW 10 - 20 | NNW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | WNW 5 - 15 |
| Saturday Night | NW 5 - 15 |
| Sunday Morning | NNW 15 - 25 |
| Sunday Afternoon | NNW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Evening | WNW 5 - 15 |
| Saturday Night | NW 10 - 20 |
| Sunday Morning | NNW 15 - 25 |
| Sunday Afternoon | NNW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | WNW 10 - 20 |
| Saturday Night | NW 15 - 25 |
| Sunday Morning | NNW 25 - 35 |
| Sunday Afternoon | NNW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | W 10 - 20 |
| Saturday Night | NW 10 - 20 |
| Sunday Morning | NNW 15 - 25 |
| Sunday Afternoon | NNW 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | WSW 10 - 20 |
| Saturday Night | NW 15 - 25 |
| Sunday Morning | NNW 15 - 25 |
| Sunday Afternoon | NNW 10 - 20 |
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: 2:52 PM PST Saturday, December 7, 2019
Extended Weather Synopsis for Thursday night through Thursday
Conditions remain mild throughout. Monday night, the ridge axis crosses our region as a frontal system moves into our region Tuesday, bringing light to occasionally moderate rain and high elevation snow. Post-frontal activity Tuesday night appears highly variable intensity in the models, but should not be a major event with temperatures too warm for snow at most locations. Wednesday looks to be mostly dry with a weaker ridge over the region.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday Night | Freezing Level | 5500' - 7500' | 6000' - 8000' | 7500' - 9500' | * |
| Tuesday | Snow Level | 4000' - 6000' | 3000' - 5000' | 6000' - 8000' | * |
| Tuesday Night | Snow Level | 3000' - 4000' | 3000' - 5000' | 6000' - 7000' | * |
| Wednesday | Freezing Level | 4000' - 5000' | 5000' - 6000' | 6000' - 7000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Night |
Freezing Level 5500' - 7500' (Easterly Flow *) |
| Tuesday |
Snow Level 4000' - 6000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3000' - 4000' (Easterly Flow *) |
| Wednesday |
Freezing Level 4000' - 5000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Night |
Freezing Level 6000' - 8000' (Easterly Flow *) |
| Tuesday |
Snow Level 3000' - 5000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3000' - 5000' (Easterly Flow *) |
| Wednesday |
Freezing Level 5000' - 6000' |
| Mt. Hood | Elevation |
|---|---|
| Monday Night |
Freezing Level 7500' - 9500' (Easterly Flow *) |
| Tuesday |
Snow Level 6000' - 8000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 6000' - 7000' (Easterly Flow *) |
| Wednesday |
Freezing Level 6000' - 7000' |
* 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 Dec 6, 2019
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