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
Today will mark the bookend of a several day stretch of dry weather. Temperatures have warmed well above freezing this afternoon at almost all sites not in a deep valley or affected by cool easterly flow through the Cascade Passes.
A splitting frontal system offshore will spread clouds and light precipitation first into the Mt Hood area this evening and eventually into the south and central Washington Cascades early Sunday morning. Snow levels will lower with the onset of precipitation, but right now it looks like Snoqualmie Pass will see light rain at Pass level. The north Cascades shouldn't see any precipitation until the weak surface low passes inland and the trailing upper level trough brings in more widespread shower activity Sunday morning. Precipitation should be on the light side and snow levels will only lower into the 4000-5000' range across the region. Showers should cut-off in the south with a partial clearing trend likely for Mt Hood and east slopes of the Cascades in the afternoon and perhaps the south Washington Cascades. More clouds will linger in the north.
While this system will be unimpressive it will open the door to a more active pattern this upcoming work week. Warm frontal moisture will brush the Olympics and north Cascades on Monday as snow/freezing levels begin to climb once again.
Weather Forecast
Hurricane Ridge
| Saturday Night | Partly cloudy in the evening becoming cloudy with a chance of light rain or snow after midnight. |
| Sunday | Scattered light rain or snow showers in the morning, becoming mostly cloudy in the afternoon. |
Mt. Baker
| Saturday Night | Mostly clear in the evening becoming mostly cloudy after midnight. |
| Sunday | Light rain and snow showers in the morning becoming scattered showers in the afternoon. |
Washington Pass and Leavenworth
| Saturday Night | Mostly clear in the evening becoming mostly cloudy late. |
| Sunday | Partly to mostly cloudy, cloudier near the Cascade crest. |
Stevens and Snoqualmie Pass
| Saturday Night | Mostly clear in the evening becoming mostly cloudy after midnight. Chance of light rain or snow late. Moderate east winds at Pass level becoming light late. |
| Sunday | Light rain or snow showers becoming mostly cloudy with scattered showers in the afternoon. |
Mt. Rainier, Crystal and White Pass
| Saturday Night | Becoming cloudy in the evening with light rain or snow developing after midnight. |
| Sunday | Light rain or snow showers becoming partly cloudy with isolated showers in the afternoon. |
Mt. Hood
| Saturday Night | Becoming cloudy in the evening with light rain or snow developing. |
| Sunday | Scattered light rain or snow showers in the morning, becoming partly cloudy in the afternoon. |
Issued: 1:49 PM PST Saturday, December 5, 2020
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Evening | Freezing Level * | 6500' | 6500' | 4000' | 4000' | 6000' | 6500' | 6500' | 6000' |
| Saturday Night | Freezing Level * | 5500' | 5500' | 3000' | 3000' | 4000' | 4500' | 5500' | 4500' |
| Sunday Morning | Snow Level | 5000' | 4500' | 4000' | 4000' | 4500' | 4500' | 4500' | 4500' |
| Sunday Afternoon | Snow Level | 5000' | 5000' | 4000' | 4500' | 5000' | 5000' | 5000' | 5000' |
| Sunday Evening | Snow Level | 5500' | 5000' | 4000' | 4000' | 4500' | 5000' | 5000' | 5000' |
| Sunday Night | Snow Level * | 6500' | 5500' | 3000' | 4000' | 7500' | 8500' | 9000' | 10000' |
| Monday Morning | Snow Level * | 6500' | 5500' | 3000' | 4000' | 7500' | 8500' | 9000' | 10000' |
| Monday Afternoon | Snow Level * | 9000' | 5500' | 3000' | 4000' | 7500' | 8500' | 9000' | 10000' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 5000' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 5500' |
| Sunday Night |
Snow Level 6500' (Easterly Flow *) |
| Monday Morning |
Snow Level 6500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 9000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 5000' |
| Sunday Night |
Snow Level 5500' (Easterly Flow *) |
| Monday Morning |
Snow Level 5500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 4000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Snow Level 4000' |
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 3000' (Easterly Flow *) |
| Monday Morning |
Snow Level 3000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 4000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Snow Level 4500' |
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 4000' (Easterly Flow *) |
| Monday Morning |
Snow Level 4000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 4500' |
| Sunday Night |
Snow Level 7500' (Easterly Flow *) |
| Monday Morning |
Snow Level 7500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 7500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 5000' |
| Sunday Night |
Snow Level 8500' (Easterly Flow *) |
| Monday Morning |
Snow Level 8500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 8500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 5000' |
| Sunday Night |
Snow Level 9000' (Easterly Flow *) |
| Monday Morning |
Snow Level 9000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 9000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 5000' |
| Sunday Night |
Snow Level 10000' (Easterly Flow *) |
| Monday Morning |
Snow Level 10000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 10000' (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 | LT 0.10 | 0 | LT 0.25 |
| Mt Baker Ski Area | 0 | LT 0.25 | LT 0.10 | 0.25 |
| Washington Pass | 0 | LT 0.10 | 0 | LT 0.10 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | LT 0.10 | LT 0.10 | 0 | 0 |
| Snoqualmie Pass | LT 0.10 | LT 0.25 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | LT 0.10 | LT 0.10 | 0 | 0 |
| Paradise | LT 0.25 | LT 0.25 | 0 | 0 |
| White Pass | LT 0.10 | LT 0.10 | 0 | 0 |
| Mt Hood Meadows | LT 0.25 | LT 0.10 | 0 | 0 |
| Timberline | 0.25 | LT 0.10 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | LT 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | LT 0.25 |
| Thursday Night | LT 0.10 |
| Thursday | 0.25 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | LT 0.25 |
| 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 | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.25 |
| Thursday | LT 0.25 |
| Thursday Night | 0 |
| Thursday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.25 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Saturday Night | 0.25 |
| 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: 1:49 PM PST Saturday, December 5, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Evening | S 10 - 20 | SE 10 - 20 | SE 10 - 20 | S 10 - 20 | SW 10 - 20 |
| Saturday Night | S 10 - 20 | S 15 - 25 | SE 10 - 20 | S 10 - 20 | S 10 - 20 |
| Sunday Morning | SW 5 - 15 | SSW 5 - 15 | SW 10 - 20 | SSW 10 - 20 | W 15 - 25 |
| Sunday Afternoon | SW 5 - 15 | SW 0 - 10 | WSW 15 - 25 | W 5 - 15 | WNW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening | S 10 - 20 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SW 5 - 15 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening | SE 10 - 20 |
| Saturday Night | S 15 - 25 |
| Sunday Morning | SSW 5 - 15 |
| Sunday Afternoon | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening | SE 10 - 20 |
| Saturday Night | SE 10 - 20 |
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | WSW 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Evening | S 10 - 20 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SSW 10 - 20 |
| Sunday Afternoon | W 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | W 15 - 25 |
| Sunday Afternoon | WNW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Evening | S 10 - 20 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SW 5 - 15 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | SE 10 - 20 |
| Saturday Night | S 15 - 25 |
| Sunday Morning | SSW 5 - 15 |
| Sunday Afternoon | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | SE 10 - 20 |
| Saturday Night | SE 10 - 20 |
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | WSW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | S 10 - 20 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SSW 10 - 20 |
| Sunday Afternoon | W 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | W 15 - 25 |
| Sunday Afternoon | WNW 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Evening | SW 15 - 25 | SW 10 - 20 | SW 10 - 20 | SW 15 - 2 | SSW 25 - 35 |
| Saturday Night | SW 20 - 30 | SW 10 - 20 | SW 15 - 25 | SW 20 - 30 | WSW 20 - 30 |
| Sunday Morning | SW 15 - 25 | SW 10 - 20 | WSW 20 - 30 | WSW 15 - 25 | WNW 15 - 25 |
| Sunday Afternoon | WSW 10 - 20 | WSW 10 - 20 | W 10 - 20 | W 5 - 15 | NW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | SW 20 - 30 |
| Sunday Morning | SW 15 - 25 |
| Sunday Afternoon | WSW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | SW 10 - 20 |
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | WSW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | SW 15 - 25 |
| Sunday Morning | WSW 20 - 30 |
| Sunday Afternoon | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | SW 15 - 2 |
| Saturday Night | SW 20 - 30 |
| Sunday Morning | WSW 15 - 25 |
| Sunday Afternoon | W 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | SSW 25 - 35 |
| Saturday Night | WSW 20 - 30 |
| Sunday Morning | WNW 15 - 25 |
| Sunday Afternoon | NW 0 - 10 |
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: 1:49 PM PST Saturday, December 5, 2020
Extended Weather Synopsis for Thursday night through Thursday
The frontal band should hang up around the Washington/British Columbia border Monday night and start to make its way through the area Tuesday or Tuesday night. There isn't a great deal of clarity on how this will all play out, but we could be looking at a few west side of the Cascades picking up over an inch of water. Snow levels will fall on the back side of the frontal passage into the 2000-3000' with showers.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday Night | Snow Level | 5000' - 6000' | 8500' - 9500' | 11000' - 12000' | * |
| Tuesday | Snow Level | 5500' - 6500' | 4500' - 5500' | 6000' - 7000' | |
| Tuesday Night | Snow Level | 3000' - 4000' | 3500' - 4500' | 4000' - 5000' | |
| Wednesday | Snow Level | 1500' - 2500' | 1500' - 2500' | 2000' - 3000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Night |
Snow Level 5000' - 6000' (Easterly Flow *) |
| Tuesday |
Snow Level 5500' - 6500' |
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 1500' - 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Night |
Snow Level 8500' - 9500' (Easterly Flow *) |
| Tuesday |
Snow Level 4500' - 5500' |
| Tuesday Night |
Snow Level 3500' - 4500' |
| Wednesday |
Snow Level 1500' - 2500' |
| Mt. Hood | Elevation |
|---|---|
| Monday Night |
Snow Level 11000' - 12000' (Easterly Flow *) |
| Tuesday |
Snow Level 6000' - 7000' |
| Tuesday Night |
Snow Level 4000' - 5000' |
| Wednesday |
Snow Level 2000' - 3000' |
* 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 5, 2020
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