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
After a beautiful Saturday across the Pacific Northwest, high clouds from an approaching frontal system have begun to intrude over the Olympics and north Cascades this afternoon. High clouds will continue to push inland tonight ahead of the frontal system. This system will take its time to move inland on Sunday, leaving us with a dry morning before disspating over the area Sunday afternoon, bring some light precipitation mainly to the northwest Cascades and Olympics and dribs and drabs elsewhere. Freezing levels will stay elevated through tonight before coming back down to 3000-4000' with the onset of precipitation Sunday. Easterly flow through the Passes will keep a good east breeze going until offshore gradients begin to relax tomorrow morning.
A quick moving frontal system Sunday night into Monday morning will bring around 0.25" of water to the west slopes of the Cascades and Mt. Hood. This system will quickly exit without much fanfare on Monday.
Weather Forecast
Hurricane Ridge
| Saturday Night | Partly cloudy with periods of high clouds in the evening, high overcast after midnight. |
| Sunday | Cloudy |
Mt. Baker
| Saturday Night | Partly cloudy with periods of high clouds in the evening, high overcast after midnight. |
| Sunday | Cloudy with light rain or snow developing mid-morning. |
Washington Pass and Leavenworth
| Saturday Night | Partly cloudy with periods of high clouds in the evening, high overcast after midnight. |
| Sunday | Cloudy with light rain or snow developing in the afternoon. |
Stevens and Snoqualmie Pass
| Saturday Night | Mostly clear with periods of high clouds in the evening, high overcast after midnight. Moderate east winds at Pass level. |
| Sunday | High overcast with filtered sunshine in the morning becoming cloudy in the afternoon with a slight chance of light rain or snow. Moderate east winds at Pass level in the morning becoming light. |
Mt. Rainier, Crystal and White Pass
| Saturday Night | Mostly clear with periods of high clouds in the evening, high overcast after midnight. |
| Sunday | High overcast with filtered sunshine in the morning becoming cloudy in the afternoon with a slight chance of light rain or snow. |
Mt. Hood
| Saturday Night | High overcast with filtered sunshine in the morning becoming cloudy in the afternoon with a slight chance of light rain or snow. |
| Sunday | Mostly clear with periods of high clouds in the evening, high overcast after midnight. |
Issued: 2:20 PM PST Saturday, November 21, 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 * | 7000' | 6500' | 6500' | 6500' | 7000' | 7000' | 8000' | 8500' |
| Saturday Night | Freezing Level * | 6500' | 6500' | 5500' | 5000' | 5500' | 6500' | 7000' | 8000' |
| Sunday Morning | Freezing Level * | 6000' | 6000' | 4000' | 4000' | 4500' | 5500' | 6500' | 7500' |
| Sunday Afternoon | Snow Level | 3500' | 3000' | 2500' | 3000' | 3000' | 3000' | 3500' | 4000' |
| Sunday Evening | Snow Level | 3000' | 2500' | 2500' | 3000' | 2500' | 3000' | 3500' | 4000' |
| Sunday Night | Snow Level | 3000' | 2000' | 2000' | 2000' | 2000' | 2500' | 3000' | 3500' |
| Monday Morning | Snow Level | 3000' | 2000' | 2000' | 2000' | 2000' | 2500' | 3000' | 3500' |
| Monday Afternoon | Snow Level | 3000' | 2500' | 2500' | 2500' | 2500' | 3000' | 3500' | 3500' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 7000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 6500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' |
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 3000' |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 3000' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 6500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Leavenworth | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 5000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Stevens Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 7000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 7000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 6500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 7000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 6500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' |
| Sunday Evening |
Snow Level 3500' |
| Sunday Night |
Snow Level 3000' |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 3500' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 8500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 8000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 7500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 4000' |
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 3500' |
| Monday Morning |
Snow Level 3500' |
| Monday Afternoon |
Snow Level 3500' |
* 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 | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Mt Baker Ski Area | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Washington Pass | 0 | 0 | LT 0.10 | LT 0.10 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | 0 | LT 0.10 | LT 0.25 | LT 0.25 |
| Mission Ridge | 0 | 0 | LT 0.10 | LT 0.10 |
| Crystal Mt | 0 | 0 | LT 0.10 | LT 0.10 |
| Paradise | 0 | LT 0.10 | 0.25 | 0.25 |
| White Pass | 0 | 0 | LT 0.10 | LT 0.25 |
| Mt Hood Meadows | 0 | LT 0.10 | LT 0.25 | LT 0.25 |
| Timberline | 0 | LT 0.10 | LT 0.25 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | LT 0.25 |
| Thursday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | LT 0.25 |
| Thursday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.25 |
| Thursday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | LT 0.25 |
| Thursday | LT 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | 0.25 |
| Thursday | 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | LT 0.25 |
| Thursday | LT 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | LT 0.10 |
| Thursday Night | LT 0.25 |
| Thursday | 0.25 |
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: 2:20 PM PST Saturday, November 21, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Evening | S 0 - 10 | S 5 - 15 | SE 5 - 15 | SE 0 - 10 | SE 5 - 15 |
| Saturday Night | S 10 - 20 | S 5 - 15 | SE 10 - 20 | SE 5 - 15 | SE 10 - 20 |
| Sunday Morning | S 15 - 25 | S 10 - 20 | SE 10 - 20 | SE 5 - 15 | SE 10 - 20 |
| Sunday Afternoon | SW 15 - 25 | SW 5 - 15 | SW 5 - 15 | SW 5 - 15 | WSW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening | S 0 - 10 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | S 15 - 25 |
| Sunday Afternoon | SW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening | S 5 - 15 |
| Saturday Night | S 5 - 15 |
| Sunday Morning | S 10 - 20 |
| Sunday Afternoon | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening | SE 5 - 15 |
| Saturday Night | SE 10 - 20 |
| Sunday Morning | SE 10 - 20 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Evening | SE 0 - 10 |
| Saturday Night | SE 5 - 15 |
| Sunday Morning | SE 5 - 15 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening | SE 5 - 15 |
| Saturday Night | SE 10 - 20 |
| Sunday Morning | SE 10 - 20 |
| Sunday Afternoon | WSW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Evening | S 0 - 10 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | S 15 - 25 |
| Sunday Afternoon | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | S 5 - 15 |
| Saturday Night | S 5 - 15 |
| Sunday Morning | S 10 - 20 |
| Sunday Afternoon | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | SE 5 - 15 |
| Saturday Night | SE 10 - 20 |
| Sunday Morning | SE 10 - 20 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | SE 0 - 10 |
| Saturday Night | SE 5 - 15 |
| Sunday Morning | SE 5 - 15 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | SE 5 - 15 |
| Saturday Night | SE 10 - 20 |
| Sunday Morning | SE 10 - 20 |
| Sunday Afternoon | WSW 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 15 - 25 | SW 10 - 20 | S 5 - 15 |
| Saturday Night | SW 25 - 35 | SW 20 - 30 | SW 15 - 25 | SW 15 - 25 | SW 10 - 20 |
| Sunday Morning | SW 30 - 40 | SW 20 - 30 | SW 20 - 30 | SW 20 - 30 | SW 20 - 30 |
| Sunday Afternoon | SW 30 - 40 | SW 25 - 35 | W 25 - 35 | W 20 - 30 | W 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | SW 25 - 35 |
| Sunday Morning | SW 30 - 40 |
| Sunday Afternoon | SW 30 - 40 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | SW 20 - 30 |
| Sunday Morning | SW 20 - 30 |
| Sunday Afternoon | SW 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | SW 15 - 25 |
| Sunday Morning | SW 20 - 30 |
| Sunday Afternoon | W 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | SW 15 - 25 |
| Sunday Morning | SW 20 - 30 |
| Sunday Afternoon | W 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | S 5 - 15 |
| Saturday Night | SW 10 - 20 |
| Sunday Morning | SW 20 - 30 |
| Sunday Afternoon | W 20 - 30 |
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: 2:20 PM PST Saturday, November 21, 2020
Extended Weather Synopsis for Thursday night through Thursday
A deep low pressure system in the Gulf of Alaska will begin to brush the area late Monday night and Tuesday with warm frontal precpitation. Currently forecast models indicate little precipitation will impact the area outside of the Olympics and the northwest Cascades including Mt Baker area. Even then, precipitation values during the day on Tuesday don't look to impressive yet but this is worth keeping an eye on. A warming trend will take place on Tuesday but this won't drive snow levels too high before the associated cold front comes crashing through sometime Tuesday night. Snow levels will drop along as precipitation and winds increase heading into Wednesday. Wednesday looks like a good post-frontal flow to add snow accumulations in the form of showers along the west slopes of the Cascades and Mt. Hood.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday Night | Snow Level | 2000' - 3000' | 2000' - 3000' | 2500' - 3500' | * |
| Tuesday | Snow Level | 4000' - 5000' | 4000' - 5000' | 4500' - 5500' | * |
| Tuesday Night | Snow Level | 2000' - 3000' | 2500' - 3500' | 3000' - 4000' | |
| Wednesday | Snow Level | 2000' - 3000' | 2500' - 3500' | 3000' - 4000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Night |
Snow Level 2000' - 3000' (Easterly Flow *) |
| Tuesday |
Snow Level 4000' - 5000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 2000' - 3000' |
| Wednesday |
Snow Level 2000' - 3000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Night |
Snow Level 2000' - 3000' (Easterly Flow *) |
| Tuesday |
Snow Level 4000' - 5000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 2500' - 3500' |
| Wednesday |
Snow Level 2500' - 3500' |
| Mt. Hood | Elevation |
|---|---|
| Monday Night |
Snow Level 2500' - 3500' (Easterly Flow *) |
| Tuesday |
Snow Level 4500' - 5500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 3000' - 4000' |
* 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 Nov 20, 2020
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