Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Sunday & Monday
A shortwave trough will eject northward out of a weak upper low today currently located off of northern California. This will spread increasing light precipitation up from the south, first affecting the Mt. Hood region and then the south Washington Cascades. Winds look to be a bit more easterly up through crest-level as the low approaches. This should add an upslope component to the east slopes of the Cascades and Cascade Passes, again resulting in light snow developing later today. Light snow will spread to most areas this evening as the precipitation shield expands northward.
Snow levels are cooler than they were just a few days ago but still not cold by late December norms. Colder air will filter in later tonight as a surface low develops in eastern Washington and the winds switch from east to west late Sunday night into Monday.
Light showers should mainly affect the west slopes of the Cascades and Mt. Hood area Monday Sunday night through Monday morning. A weak upper-level ridge will build over the area during the day Monday, but this will likely trap low level moisture for the same areas rather than lead to a clearing trend. There's a higher chance for sunshine for the Hurricane Ridge area and along the east slopes of the Cascades on Monday afternoon.
Weather Forecast
Hurricane Ridge
| Sunday | High overcast with filtered sunshine. |
Mt. Baker
| Sunday | High overcast with filtered sunshine. |
Washington Pass and Leavenworth
| Sunday | Cloudy with light rain and snow developing in the afternoon. |
Stevens and Snoqualmie Pass
| Sunday | Cloudy with light rain and snow developing in the afternoon. Moderate East winds at Pass level and at crest-level. |
Mt. Rainier, Crystal and White Pass
| Sunday | Cloudy with light rain and snow developing in the afternoon. Moderate East winds at crest-level. |
Mt. Hood
| Sunday | Cloudy with light rain and snow developing in the afternoon. |
Issued: 7:06 AM PST Sunday, December 22, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Morning | Freezing Level * | 3000' | 2500' | 2500' | 2500' | 3000' | 3000' | 4000' | 4000' |
| Sunday Afternoon | Snow Level * | 3500' | 3500' | 2500' | 2500' | 2500' | 3000' | 4000' | 4000' |
| Sunday Evening | Snow Level * | 3000' | 3000' | 2500' | 3000' | 2500' | 3000' | 3500' | 4000' |
| Sunday Night | Snow Level | 2000' | 2000' | 2000' | 2500' | 2000' | 2500' | 2500' | 3000' |
| Monday Morning | Snow Level | 2000' | 1500' | 2000' | 2000' | 2000' | 2500' | 2500' | 2500' |
| Monday Afternoon | Snow Level | 2000' | 1500' | 2000' | 2000' | 2000' | 2000' | 2000' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 1500' |
| Monday Afternoon |
Snow Level 1500' |
| Washington Pass | Elevation |
|---|---|
| Sunday Morning |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 2500' (Easterly Flow *) |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2000' |
| Leavenworth | Elevation |
|---|---|
| Sunday Morning |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2000' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 2500' (Easterly Flow *) |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Sunday Evening |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 2000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Sunday Evening |
Snow Level 3500' (Easterly Flow *) |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 2000' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Sunday Evening |
Snow Level 4000' (Easterly Flow *) |
| Sunday Night |
Snow Level 3000' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 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.
Precipitation Forecast
| Sunday | Sunday Night | Monday | |
|---|---|---|---|
| 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | 0 |
| Mt Baker Ski Area | 0 | LT 0.10 | 0 |
| Washington Pass | LT 0.10 | LT 0.25 | 0 |
| Leavenworth | LT 0.10 | LT 0.25 | 0 |
| Stevens Pass | LT 0.10 | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | LT 0.10 | LT 0.25 | LT 0.10 |
| Mission Ridge | LT 0.25 | LT 0.25 | 0 |
| Crystal Mt | LT 0.10 | LT 0.25 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.25 | LT 0.10 |
| White Pass | LT 0.10 | 0.25 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | 0.25 - 0.50 | LT 0.10 |
| Timberline | LT 0.10 | 0.25 - 0.50 | LT 0.10 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Sunday | 0 |
| Sunday Night | 0 |
| Monday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Monday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Monday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Monday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Monday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Monday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday | LT 0.25 |
| Sunday Night | LT 0.25 |
| Monday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Monday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Monday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | 0.25 |
| Monday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | 0.25 - 0.50 |
| Monday | LT 0.10 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday | LT 0.10 |
| Sunday Night | 0.25 - 0.50 |
| Monday | LT 0.10 |
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: 7:06 AM PST Sunday, December 22, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Morning | SE 0 - 10 | E 5 - 15 | E 10 - 20 | E 5 - 15 | E 10 - 20 |
| Sunday Afternoon | ENE 0 - 10 | E 5 - 15 | E 15 - 25 | SE 10 - 20 | E 10 - 20 |
| Sunday Evening | ENE 0 - 10 | NE 5 - 15 | E 10 - 20 | SE 5 - 15 | SW 10 - 20 |
| Sunday Night | W 0 - 10 | NW 0 - 10 | W 10 - 20 | W 10 - 20 | W 15 - 25 |
| Monday Morning | SW 0 - 10 | W 0 - 10 | W 10 - 20 | W 10 - 20 | W 15 - 25 |
| Monday Afternoon | W 0 - 10 | SW 0 - 10 | W 5 - 15 | W 0 - 10 | W 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | ENE 0 - 10 |
| Sunday Evening | ENE 0 - 10 |
| Sunday Night | W 0 - 10 |
| Monday Morning | SW 0 - 10 |
| Monday Afternoon | W 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | E 5 - 15 |
| Sunday Evening | NE 5 - 15 |
| Sunday Night | NW 0 - 10 |
| Monday Morning | W 0 - 10 |
| Monday Afternoon | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning | E 10 - 20 |
| Sunday Afternoon | E 15 - 25 |
| Sunday Evening | E 10 - 20 |
| Sunday Night | W 10 - 20 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | SE 10 - 20 |
| Sunday Evening | SE 5 - 15 |
| Sunday Night | W 10 - 20 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning | E 10 - 20 |
| Sunday Afternoon | E 10 - 20 |
| Sunday Evening | SW 10 - 20 |
| Sunday Night | W 15 - 25 |
| Monday Morning | W 15 - 25 |
| Monday Afternoon | W 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | ENE 0 - 10 |
| Sunday Evening | ENE 0 - 10 |
| Sunday Night | W 0 - 10 |
| Monday Morning | SW 0 - 10 |
| Monday Afternoon | W 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | E 5 - 15 |
| Sunday Evening | NE 5 - 15 |
| Sunday Night | NW 0 - 10 |
| Monday Morning | W 0 - 10 |
| Monday Afternoon | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | E 10 - 20 |
| Sunday Afternoon | E 15 - 25 |
| Sunday Evening | E 10 - 20 |
| Sunday Night | W 10 - 20 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | SE 10 - 20 |
| Sunday Evening | SE 5 - 15 |
| Sunday Night | W 10 - 20 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | W 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | E 10 - 20 |
| Sunday Afternoon | E 10 - 20 |
| Sunday Evening | SW 10 - 20 |
| Sunday Night | W 15 - 25 |
| Monday Morning | W 15 - 25 |
| Monday Afternoon | W 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 | |
|---|---|---|---|---|---|
| Sunday Morning | S 5 - 15 | S 5 - 15 | S 10 - 20 | S 10 - 20 | SW 25 - 35 |
| Sunday Afternoon | SE 5 - 15 | S 15 - 25 | S 20 - 30 | S 20 - 30 | S 25 - 35 |
| Sunday Evening | S 5 - 15 | S 10 - 20 | S 15 - 25 | S 10 - 20 | SW 20 - 30 |
| Sunday Night | SW 10 - 20 | SW 10 - 20 | W 10 - 20 | W 10 - 20 | W 25 - 35 |
| Monday Morning | NW 5 - 15 | NW 5 - 15 | NW 15 - 25 | NW 15 - 25 | W 20 - 30 |
| Monday Afternoon | W 5 - 15 | W 5 - 15 | W 10 - 20 | NW 5 - 15 | W 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | S 5 - 15 |
| Sunday Afternoon | SE 5 - 15 |
| Sunday Evening | S 5 - 15 |
| Sunday Night | SW 10 - 20 |
| Monday Morning | NW 5 - 15 |
| Monday Afternoon | W 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Morning | S 5 - 15 |
| Sunday Afternoon | S 15 - 25 |
| Sunday Evening | S 10 - 20 |
| Sunday Night | SW 10 - 20 |
| Monday Morning | NW 5 - 15 |
| Monday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | S 10 - 20 |
| Sunday Afternoon | S 20 - 30 |
| Sunday Evening | S 15 - 25 |
| Sunday Night | W 10 - 20 |
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | S 10 - 20 |
| Sunday Afternoon | S 20 - 30 |
| Sunday Evening | S 10 - 20 |
| Sunday Night | W 10 - 20 |
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | NW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | SW 25 - 35 |
| Sunday Afternoon | S 25 - 35 |
| Sunday Evening | SW 20 - 30 |
| Sunday Night | W 25 - 35 |
| Monday Morning | W 20 - 30 |
| Monday Afternoon | W 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Dec 21, 2019
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