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 broad trough sits over much of the the U.S. with a closed, vertically stacked low spinning over eastern Washington on Saturday afternoon bringing clouds and periodic rain/snow showers to the region.
The low will exit to the south and east Saturday night, bringing a drying trend Saturday night through the day on Sunday with instability rain and snow showers becoming less frequent and ending. Saturday night into Sunday, 1-2" of snow are possible in some locations from the central Washington Cascades southward.
The cool air mass will remain in place through Monday as the western portion of the broad trough remains over the region.
Easterly winds will begin to increase through the passes beginning Sunday evening as a narrow ridge approaches the region from the west.
Weather Forecast
Hurricane Ridge
| Saturday Night | Low clouds lingering in some areas with light E-NE winds. |
| Sunday | Partly to mostly cloudy with Light to occasionally moderate E wind. |
Mt. Baker
| Saturday Night | Mostly clear with light wind. |
| Sunday | Mostly sunny with light wind. |
Stevens and Snoqualmie Pass
| Saturday Night | Mostly cloudy with light winds. |
| Sunday | Decreasing clouds, becoming mostly sunny in the afternoon. Light winds. |
Mt. Rainier and Crystal
| Saturday Night | Mostly cloudy with light winds. |
| Sunday | Decreasing clouds, becoming mostly sunny in the afternoon. Light winds. |
Washington Pass and Leavenworth
| Saturday Night | Mostly clear in the north, mostly cloudy in the south. Light winds. |
| Sunday | Mostly clear, north. Decreasing clouds and becoming mostly clear by after noon in the south. Light winds. |
Mt. Hood
| Saturday Night | Mostly cloudy. |
| Sunday | Mostly cloudy with decreasing clouds by evening. |
Issued: 2:59 PM PST Saturday, December 1, 2018
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 | 2500' | 2500' | 2000' | 2000' | 2000' | 2000' | 2000' | 2000' |
| Saturday Night | Snow Level | 2500' | 2000' | 1500' | 2000' | 2000' | 2000' | 2000' | 1500' |
| Sunday Morning | Snow Level | 2000' | 2000' | 1500' | 1500' | 1500' | 1500' | 2000' | 2000' |
| Sunday Afternoon | Snow Level | 2000' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' |
| Sunday Evening | Freezing Level * | 2500' | 2000' | 1000' | 2000' | 2000' | 2000' | 2000' | 2500' |
| Sunday Night | Freezing Level * | 2000' | 1500' | 500' | 1000' | 1000' | 1000' | 1000' | 1500' |
| Sunday Morning | Snow Level | 2000' | 2000' | 1500' | 1500' | 1500' | 1500' | 2000' | 2000' |
| Sunday Afternoon | Snow Level | 2000' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening |
Snow Level 2500' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Evening |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Night |
Freezing Level 2000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening |
Snow Level 2500' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Freezing Level 2000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 1500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 2000' |
| Saturday Night |
Snow Level 1500' |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2500' |
| Leavenworth | Elevation |
|---|---|
| Saturday Evening |
Snow Level 2000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Freezing Level 2000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2500' |
| Stevens Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 2000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Freezing Level 2000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 2000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Freezing Level 2000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Evening |
Snow Level 2000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Freezing Level 2000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening |
Snow Level 2000' |
| Saturday Night |
Snow Level 1500' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Night |
Freezing Level 1500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
* 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 | 0 | 0 | 0 | 0 |
| Washington Pass | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | 0 | 0 |
| Snoqualmie Pass | LT 0.10 | LT 0.10 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Mission Ridge | LT 0.10 | 0 | 0 | 0 |
| Crystal Mt | LT 0.10 | 0 | 0 | 0 |
| Paradise | LT 0.25 | LT 0.10 | 0 | 0 |
| White Pass | LT 0.10 | 0 | 0 | 0 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 | 0 | 0 |
| Timberline | LT 0.10 | LT 0.10 | 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 | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| 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 | LT 0.25 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| 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: 2:59 PM PST Saturday, December 1, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Evening | NNE 0 - 10 | NE 0 - 10 | N 0 - 10 | NNW 0 - 10 | W 5 - 15 |
| Saturday Night | E 5 - 15 | NE 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | W 10 - 20 |
| Sunday Morning | ENE 5 - 15 | ENE 5 - 15 | VAR 0 - 10 | VAR 0 - 10 | W 5 - 15 |
| Sunday Afternoon | E 0 - 10 | E 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | W 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening | NNE 0 - 10 |
| Saturday Night | E 5 - 15 |
| Sunday Morning | ENE 5 - 15 |
| Sunday Afternoon | E 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening | NE 0 - 10 |
| Saturday Night | NE 0 - 10 |
| Sunday Morning | ENE 5 - 15 |
| Sunday Afternoon | E 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening | N 0 - 10 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | VAR 0 - 10 |
| Sunday Afternoon | VAR 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Evening | NNW 0 - 10 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | VAR 0 - 10 |
| Sunday Afternoon | VAR 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening | W 5 - 15 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 5 - 15 |
| Sunday Afternoon | W 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Evening | NNE 0 - 10 |
| Saturday Night | E 5 - 15 |
| Sunday Morning | ENE 5 - 15 |
| Sunday Afternoon | E 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | NE 0 - 10 |
| Saturday Night | NE 0 - 10 |
| Sunday Morning | ENE 5 - 15 |
| Sunday Afternoon | E 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | N 0 - 10 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | VAR 0 - 10 |
| Sunday Afternoon | VAR 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | NNW 0 - 10 |
| Saturday Night | VAR 0 - 10 |
| Sunday Morning | VAR 0 - 10 |
| Sunday Afternoon | VAR 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | W 5 - 15 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 5 - 15 |
| Sunday Afternoon | W 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 | NE 0 - 10 | VAR 0 - 10 | NE 5 - 15 | N 5 - 15 | NW 15 - 25 |
| Saturday Night | NE 0 - 10 | NW 0 - 10 | NE 0 - 10 | NE 0 - 10 | NW 10 - 20 |
| Sunday Morning | NNE 0 - 10 | NNW 5 - 15 | N 0 - 10 | NE 0 - 10 | NW 10 - 20 |
| Sunday Afternoon | VAR 0 - 10 | NW 5 - 15 | W 5 - 15 | VAR 0 - 10 | W 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | NE 0 - 10 |
| Saturday Night | NE 0 - 10 |
| Sunday Morning | NNE 0 - 10 |
| Sunday Afternoon | VAR 0 - 10 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Evening | VAR 0 - 10 |
| Saturday Night | NW 0 - 10 |
| Sunday Morning | NNW 5 - 15 |
| Sunday Afternoon | NW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | NE 5 - 15 |
| Saturday Night | NE 0 - 10 |
| Sunday Morning | N 0 - 10 |
| Sunday Afternoon | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | N 5 - 15 |
| Saturday Night | NE 0 - 10 |
| Sunday Morning | NE 0 - 10 |
| Sunday Afternoon | VAR 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | NW 15 - 25 |
| Saturday Night | NW 10 - 20 |
| Sunday Morning | NW 10 - 20 |
| Sunday Afternoon | W 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.
Issued: 2:59 PM PST Saturday, December 1, 2018
Extended Weather Synopsis for Thursday night through Thursday
Monday night through Wednesday, split flow will enable a cutoff low pressure system to work its way to the southern California coastal waters while a northern branch of the storm track remains well to our north.
Over our region, expect generally fair skies. Northerly flow aloft will allow some of the coldest air of the season to move into our region, particularly east of the Cascade Crest.
An east-west temperature and pressure gradient will increase and will drive moderate to locally strong winds Tuesday and Wednesday through the Cascade passes.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday Night | Freezing Level | 2000' - 3000' | 1500' - 2500' | 500' - 1500' | * |
| Tuesday | Freezing Level | 3000' - 4000' | 2500' - 3500' | 1500' - 2500' | * |
| Tuesday Night | Freezing Level | 3500' - 4500' | 2500' - 3500' | 2500' - 4500' | * |
| Wednesday | Freezing Level | 2500' - 3500' | 2500' - 3500' | 1000' - 3000' | * |
| Mt. Baker | Elevation |
|---|---|
| Monday Night |
Freezing Level 2000' - 3000' (Easterly Flow *) |
| Tuesday |
Freezing Level 3000' - 4000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 3500' - 4500' (Easterly Flow *) |
| Wednesday |
Freezing Level 2500' - 3500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Night |
Freezing Level 1500' - 2500' (Easterly Flow *) |
| Tuesday |
Freezing Level 2500' - 3500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 2500' - 3500' (Easterly Flow *) |
| Wednesday |
Freezing Level 2500' - 3500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Night |
Freezing Level 500' - 1500' (Easterly Flow *) |
| Tuesday |
Freezing Level 1500' - 2500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 2500' - 4500' (Easterly Flow *) |
| Wednesday |
Freezing Level 1000' - 3000' (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 Nov 30, 2018
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