Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Sunday night through Thursday
A weak low pressure system traversing across Oregon this afternoon has produced several inches of light snow over the south Washington Cascades and Mt. Hood area. Light snow and rain will come to an end for these same areas this evening with dry and fair weather forecast on Monday.
High pressure building offshore around 135W will flop into southern B.C Monday. Increasing subsidence aloft (sinking motion) combined with weak onshore flow at the surface should trap some moisture and low clouds below Cascade crest level along the west slopes of the Cascades. Sunnier skies are a much better bet along the east slopes of the Cascades tomorrow with freezing levels relatively cooler. Look for a stiff NW wind in the alpine Monday as well.
The ridge will stay anchored offshore but will flatten Monday night and Tuesday allowing a fast-moving weather system to move across the area in NW flow aloft. A light to a moderate shot of precipitation should mainly be in store for the west slopes of the Cascades and Mt. Hood as snow levels rise quickly later in the day.
Weather Forecast
Hurricane Ridge
| Sunday Night | Mostly cloudy becoming partly cloudy in the evening. |
| Monday | Partly to mostly sunny. |
Mt. Baker
| Sunday Night | Mostly cloudy becoming partly cloudy in the evening. |
| Monday | Partly to mostly cloudy. |
Washington Pass and Leavenworth
| Sunday Night | Cloudy in the evening, becoming partly cloudy after midnight. |
| Monday | Mostly sunny. |
Stevens and Snoqualmie Pass
| Sunday Night | Cloudy in the evening, becoming mostly cloudy after midnight. Light west wind at Pass level. |
| Monday | Partly to mostly cloudy. Light to moderate NW wind in the alpine. Light west wind at Pass level. |
Mt. Rainier, Crystal and White Pass
| Sunday Night | Cloudy in the evening with periods of very light snow, becoming mostly cloudy after midnight. |
| Monday | Partly to mostly cloudy. Light to moderate NW wind in the alpine. |
Mt. Hood
| Sunday Night | Cloudy in the evening with periods of light snow, becoming mostly cloudy after midnight. |
| Monday | Partly to mostly cloudy. Light to moderate NW wind in the alpine. |
Issued: 2:33 PM PST Sunday, January 20, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Evening | Snow Level | 2500' | 2000' | 1500' | 2500' | 2500' | 2500' | 3000' | 3000' |
| Sunday Night | Freezing Level | 1500' | 1000' | 500' | 1000' | 1500' | 1500' | 1500' | 1500' |
| Monday Morning | Freezing Level | 1500' | 1000' | 500' | 1000' | 1500' | 1500' | 1500' | 1500' |
| Monday Afternoon | Freezing Level | 2500' | 2000' | 2000' | 2000' | 2000' | 2000' | 2500' | 2500' |
| Monday Evening | Freezing Level | 2500' | 2000' | 2000' | 2000' | 2000' | 2000' | 2500' | 2500' |
| Monday Night | Snow Level | 2000' | 1500' | 500' | 500' | 1000' | 1500' | 1500' | 1500' |
| Tuesday Morning | Snow Level | 3500' | 2000' | 1000' | 1500' | 1500' | 2000' | 2000' | 3500' |
| Tuesday Afternoon | Snow Level * | 5500' | 3000' | 3000' | 3000' | 3000' | 3500' | 4500' | 5500' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Freezing Level 1500' |
| Monday Morning |
Freezing Level 1500' |
| Monday Afternoon |
Freezing Level 2500' |
| Monday Evening |
Freezing Level 2500' |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2000' |
| Sunday Night |
Freezing Level 1000' |
| Monday Morning |
Freezing Level 1000' |
| Monday Afternoon |
Freezing Level 2000' |
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 1500' |
| Sunday Night |
Freezing Level 500' |
| Monday Morning |
Freezing Level 500' |
| Monday Afternoon |
Freezing Level 2000' |
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Snow Level 500' |
| Tuesday Morning |
Snow Level 1000' |
| Tuesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Freezing Level 1000' |
| Monday Morning |
Freezing Level 1000' |
| Monday Afternoon |
Freezing Level 2000' |
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Snow Level 500' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Freezing Level 1500' |
| Monday Morning |
Freezing Level 1500' |
| Monday Afternoon |
Freezing Level 2000' |
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Freezing Level 1500' |
| Monday Morning |
Freezing Level 1500' |
| Monday Afternoon |
Freezing Level 2000' |
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Freezing Level 1500' |
| Monday Morning |
Freezing Level 1500' |
| Monday Afternoon |
Freezing Level 2500' |
| Monday Evening |
Freezing Level 2500' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Freezing Level 1500' |
| Monday Morning |
Freezing Level 1500' |
| Monday Afternoon |
Freezing Level 2500' |
| Monday Evening |
Freezing Level 2500' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 5500' (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
| Sunday Night | Thursday | Thursday Night | Thursday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | LT 0.10 | 0.25 |
| Mt Baker Ski Area | 0 | 0 | LT 0.10 | 0.25 - 0.50 |
| Washington Pass | 0 | 0 | 0 | LT 0.10 |
| Leavenworth | 0 | 0 | 0 | LT 0.10 |
| Stevens Pass | 0 | 0 | 0 | 0.25 - 0.50 |
| Snoqualmie Pass | 0 | 0 | 0 | 0.25 - 0.50 |
| Mission Ridge | 0 | 0 | 0 | LT 0.10 |
| Crystal Mt | 0 | 0 | 0 | LT 0.25 |
| Paradise | 0 | 0 | 0 | 0.50 - 0.75 |
| White Pass | LT 0.10 | 0 | 0 | 0.25 - 0.50 |
| Mt Hood Meadows | LT 0.10 | 0 | 0 | 0.25 - 0.50 |
| Timberline | LT 0.10 | 0 | 0 | 0.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | 0.25 - 0.50 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.25 - 0.50 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.25 - 0.50 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.50 - 0.75 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.25 - 0.50 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.25 - 0.50 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.50 |
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: 2:33 PM PST Sunday, January 20, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | NW 0 - 10 | NW 0 - 10 | NW 0 - 10 | NW 0 - 10 | NW 5 - 15 |
| Sunday Night | NW 5 - 15 | NW 0 - 10 | NW 5 - 15 | NW 5 - 15 | NW 10 - 20 |
| Monday Morning | NW 0 - 10 | NW 0 - 10 | NW 0 - 10 | NW 5 - 15 | NW 15 - 25 |
| Monday Afternoon | W 0 - 10 | SW 0 - 10 | W 5 - 15 | WNW 5 - 15 | WNW 15 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening | NW 0 - 10 |
| Sunday Night | NW 5 - 15 |
| Monday Morning | NW 0 - 10 |
| Monday Afternoon | W 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening | NW 0 - 10 |
| Sunday Night | NW 0 - 10 |
| Monday Morning | NW 0 - 10 |
| Monday Afternoon | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | NW 0 - 10 |
| Sunday Night | NW 5 - 15 |
| Monday Morning | NW 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Evening | NW 0 - 10 |
| Sunday Night | NW 5 - 15 |
| Monday Morning | NW 5 - 15 |
| Monday Afternoon | WNW 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | NW 5 - 15 |
| Sunday Night | NW 10 - 20 |
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | WNW 15 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Evening | NW 0 - 10 |
| Sunday Night | NW 5 - 15 |
| Monday Morning | NW 0 - 10 |
| Monday Afternoon | W 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | NW 0 - 10 |
| Sunday Night | NW 0 - 10 |
| Monday Morning | NW 0 - 10 |
| Monday Afternoon | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | NW 0 - 10 |
| Sunday Night | NW 5 - 15 |
| Monday Morning | NW 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | NW 0 - 10 |
| Sunday Night | NW 5 - 15 |
| Monday Morning | NW 5 - 15 |
| Monday Afternoon | WNW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | NW 5 - 15 |
| Sunday Night | NW 10 - 20 |
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | WNW 15 - 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | NW 5 - 15 | NW 10 - 20 | NW 15 - 25 | NW 10 - 20 | NW 10 - 20 |
| Sunday Night | NW 10 - 20 | NW 10 - 20 | NW 20 - 30 | NW 20 - 30 | NW 20 - 30 |
| Monday Morning | NW 10 - 20 | NW 15 - 25 | NW 20 - 30 | NW 20 - 30 | NW 25 - 35 |
| Monday Afternoon | NW 10 - 20 | NW 15 - 25 | NW 20 - 30 | NW 20 - 30 | NW 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | NW 5 - 15 |
| Sunday Night | NW 10 - 20 |
| Monday Morning | NW 10 - 20 |
| Monday Afternoon | NW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Evening | NW 10 - 20 |
| Sunday Night | NW 10 - 20 |
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | NW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | NW 15 - 25 |
| Sunday Night | NW 20 - 30 |
| Monday Morning | NW 20 - 30 |
| Monday Afternoon | NW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | NW 10 - 20 |
| Sunday Night | NW 20 - 30 |
| Monday Morning | NW 20 - 30 |
| Monday Afternoon | NW 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | NW 10 - 20 |
| Sunday Night | NW 20 - 30 |
| Monday Morning | NW 25 - 35 |
| Monday Afternoon | NW 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: 2:33 PM PST Sunday, January 20, 2019
Extended Weather Synopsis for Thursday night through Thursday
A stronger frontal system right on the heels of first will move in Tuesday night and Wednesday morning. This system will be wetter and warmer with strong W-NW winds. It will also move through the region quickly with post-frontal showers decreasing during the day Wednesday. The ridge will quickly amplify offshore Wednesday night and Thursday with mild air moving in. This ridge of high pressure should lead to at least a few days of dry weather.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Night | Snow Level | 4000' - 5000' | 5000' - 6000' | 6000' - 7000' | |
| Wednesday | Snow Level | 3500' - 4500' | 4000' - 5000' | 5500' - 6500' | |
| Wednesday Night | Snow Level | 3500' - 4500' | 3500' - 4500' | 4000' - 5000' | |
| Thursday | Snow Level | 4000' - 6000' | 4000' - 6000' | 6000' - 8000' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Night |
Snow Level 4000' - 5000' |
| Wednesday |
Snow Level 3500' - 4500' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday |
Snow Level 4000' - 6000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night |
Snow Level 5000' - 6000' |
| Wednesday |
Snow Level 4000' - 5000' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday |
Snow Level 4000' - 6000' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night |
Snow Level 6000' - 7000' |
| Wednesday |
Snow Level 5500' - 6500' |
| Wednesday Night |
Snow Level 4000' - 5000' |
| Thursday |
Snow Level 6000' - 8000' |
* 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 Jan 20, 2019
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