Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Monday night through Monday
A subtropical feed of moisture is shifting southward on Monday afternoon as a trough pushes into the region. Precipitation will be associated with a weak low spawning a spiral band of convective showers isolated generally weak thunderstorms as it moves toward the Olympic Peninsula on Monday evening. With subtropical moisture just to the south, the upper trough will have a good amount of moisture to work with and convective energy, showers may be locally intense. Ahead of the trough, precipitation will focus more on the North Cascades, but as the winds shift WNW behind the trough, it will sag southward and some convergence activity is likely.
On Tuesday, flow aloft shifts NWerly with a broad ridge building offshore. Light and gradually decreasing rain and snow showers will continue over the Washington Cascades with light to moderate showers strongest in the Mt. Rainier and Mt. Hood areas. The North Cascades should dry out by late morning with the east slopes of the Cascades experiencing plenty of sunshine.
Tuesday night, the northwest flow will continue, but shower activity will become very light as the broad ridge to our SW noses into the region.
On Wednesday, a frontal system will arrive by afternoon on a WNW, increasing rain/snow and winds.
Moderate to strong winds will be present for much of the period in the south Washington Cascades and Mt Hood regions.
Weather Forecast
Hurricane Ridge
| Monday Night | Scattered showers and a chance of a thunderstorm. Light winds increasing to moderate. |
| Tuesday | Partly cloudy. Light to moderate winds. |
Mt. Baker
| Monday Night | Moderate rain and snow showers. Chance of a thundershower during the evening. Light winds. |
| Tuesday | Decreasing light rain and snow showers. Light to moderate winds. |
Washington Pass and Leavenworth
| Monday Night | Light to moderate rain and snow showers early, then light showers lingering near the Cascade Crest. Light to occasionally moderate winds. |
| Tuesday | Generally decreasing light shower activity mainly near the Cascade Crest. Light to moderate winds. |
Stevens and Snoqualmie Pass
| Monday Night | Light to moderate rain and snow showers decreasing around midnight, but re-intensifying late in convergence bands. Light winds becoming moderate at 5000 ft. Light W wind at pass level. |
| Tuesday | Decreasing light rain and snow showers. Moderate winds at 5000 ft, light W wind at pass level. |
Mt. Rainier, Crystal and White Pass
| Monday Night | Light rain and snow showers decreasing around midnight, but re-intensifying late. |
| Tuesday | Moderate rain and snow showers. Moderate winds. |
Mt. Hood
| Monday Night | Decreasing moderate shower activity before midnight then increasing again after midnight. Chance of a thunderstorm early. Moderate to strong winds. |
| Tuesday | Decreasing light to moderate snow showers. Strong winds. |
Issued: 2:51 PM PDT Monday, April 8, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Evening | Snow Level | 5000' | 5000' | 5500' | 5500' | 5500' | 5500' | 5500' | 5500' |
| Monday Night | Snow Level | 4000' | 4500' | 4500' | 5000' | 4500' | 4500' | 4500' | 4000' |
| Tuesday Morning | Snow Level | 4000' | 3500' | 4000' | 4000' | 3500' | 4000' | 3500' | 3500' |
| Tuesday Afternoon | Snow Level | 4500' | 4000' | 4500' | 4500' | 4000' | 3500' | 4000' | 3500' |
| Tuesday Evening | Snow Level | 4500' | 4000' | 4500' | 4500' | 4000' | 4000' | 4000' | 4000' |
| Tuesday Night | Snow Level | 4000' | 3500' | 3500' | 3500' | 3000' | 3000' | 3500' | 3000' |
| Wednesday Morning | Snow Level | 3500' | 3000' | 3500' | 3500' | 3000' | 3000' | 3000' | 3000' |
| Wednesday Afternoon | Snow Level | 3500' | 3500' | 4500' | 4000' | 4000' | 3500' | 4000' | 3500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Snow Level 5000' |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 4000' |
| Tuesday Afternoon |
Snow Level 4500' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Snow Level 5000' |
| Monday Night |
Snow Level 4500' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Tuesday Evening |
Snow Level 4000' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday Afternoon |
Snow Level 3500' |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 4500' |
| Tuesday Morning |
Snow Level 4000' |
| Tuesday Afternoon |
Snow Level 4500' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4500' |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 5000' |
| Tuesday Morning |
Snow Level 4000' |
| Tuesday Afternoon |
Snow Level 4500' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4000' |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 4500' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Tuesday Evening |
Snow Level 4000' |
| Tuesday Night |
Snow Level 3000' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday Afternoon |
Snow Level 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 4500' |
| Tuesday Morning |
Snow Level 4000' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Evening |
Snow Level 4000' |
| Tuesday Night |
Snow Level 3000' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday Afternoon |
Snow Level 3500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 4500' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Tuesday Evening |
Snow Level 4000' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday Afternoon |
Snow Level 4000' |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Evening |
Snow Level 4000' |
| Tuesday Night |
Snow Level 3000' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday 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
| Monday Night | Monday | Monday Night | Monday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0.25 | 0 | 0 | LT 0.25 |
| Mt Baker Ski Area | 0.50 - 0.75 | LT 0.10 | LT 0.10 | 0.25 - 0.50 |
| Washington Pass | LT 0.25 | LT 0.10 | 0 | LT 0.10 |
| Leavenworth | LT 0.25 | 0 | 0 | LT 0.10 |
| Stevens Pass | 0.50 | 0.25 | LT 0.10 | 0.25 |
| Snoqualmie Pass | 0.25 - 0.50 | 0.25 - 0.50 | LT 0.10 | 0.25 |
| Mission Ridge | LT 0.25 | 0 | 0 | 0 |
| Crystal Mt | LT 0.25 | LT 0.25 | 0 | LT 0.10 |
| Paradise | 0.25 | 0.50 - 0.75 | LT 0.25 | 0.25 |
| White Pass | 0.25 | 0.25 | LT 0.10 | LT 0.25 |
| Mt Hood Meadows | 0.75 | 0.50 | LT 0.25 | LT 0.25 |
| Timberline | 0.75 | 0.50 - 0.75 | LT 0.25 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | LT 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | 0.50 - 0.75 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0.25 - 0.50 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Monday | LT 0.10 |
| Monday Night | 0 |
| Monday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0.50 |
| Monday | 0.25 |
| Monday Night | LT 0.10 |
| Monday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 - 0.50 |
| Monday | 0.25 - 0.50 |
| Monday Night | LT 0.10 |
| Monday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Monday | LT 0.25 |
| Monday Night | 0 |
| Monday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 |
| Monday | 0.50 - 0.75 |
| Monday Night | LT 0.25 |
| Monday | 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 |
| Monday | 0.25 |
| Monday Night | LT 0.10 |
| Monday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | 0.75 |
| Monday | 0.50 |
| Monday Night | LT 0.25 |
| Monday | LT 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | 0.75 |
| Monday | 0.50 - 0.75 |
| Monday Night | LT 0.25 |
| Monday | 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: 2:51 PM PDT Monday, April 8, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | SW 5 - 15 | SW 5 - 15 | WSW 10 - 20 | SW 5 - 15 | WSW 20 - 30 |
| Monday Night | W 15 - 25 | W 5 - 15 | W 15 - 25 | W 15 - 25 | W 25 - 35 |
| Tuesday Morning | W 15 - 25 | WSW 10 - 20 | W 15 - 25 | W 15 - 25 | W 30 - 45 |
| Tuesday Afternoon | W 15 - 25 | WSW 10 - 20 | W 15 - 25 | W 15 - 25 | W 30 - 45 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | SW 5 - 15 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | SW 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon | WSW 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | WSW 10 - 20 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | SW 5 - 15 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | WSW 20 - 30 |
| Monday Night | W 25 - 35 |
| Tuesday Morning | W 30 - 45 |
| Tuesday Afternoon | W 30 - 45 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | SW 5 - 15 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | SW 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon | WSW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | WSW 10 - 20 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | SW 5 - 15 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | WSW 20 - 30 |
| Monday Night | W 25 - 35 |
| Tuesday Morning | W 30 - 45 |
| Tuesday Afternoon | W 30 - 45 |
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 | |
|---|---|---|---|---|---|
| Monday Evening | WSW 10 - 20 | WSW 20 - 30 | WSW 20 - 30 | WSW 20 - 30 | WSW 25 - 35 |
| Monday Night | W 10 - 20 | WNW 10 - 20 | W 20 - 30 | W 30 - 45 | W 30 - 45 |
| Tuesday Morning | WNW 10 - 20 | WNW 15 - 25 | WNW 25 - 35 | WNW 30 - 45 | NW 35 - 50 |
| Tuesday Afternoon | W 15 - 25 | WNW 20 - 30 | WNW 30 - 45 | WNW 30 - 45 | WNW 35 - 50 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | WSW 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | WNW 10 - 20 |
| Tuesday Afternoon | W 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | WSW 20 - 30 |
| Monday Night | WNW 10 - 20 |
| Tuesday Morning | WNW 15 - 25 |
| Tuesday Afternoon | WNW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | WSW 20 - 30 |
| Monday Night | W 20 - 30 |
| Tuesday Morning | WNW 25 - 35 |
| Tuesday Afternoon | WNW 30 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | WSW 20 - 30 |
| Monday Night | W 30 - 45 |
| Tuesday Morning | WNW 30 - 45 |
| Tuesday Afternoon | WNW 30 - 45 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | WSW 25 - 35 |
| Monday Night | W 30 - 45 |
| Tuesday Morning | NW 35 - 50 |
| Tuesday Afternoon | WNW 35 - 50 |
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: 2:51 PM PDT Monday, April 8, 2019
Extended Weather Synopsis for Monday night through Monday
Wednesday's frontal system is expected to stall over Oregon continuing rain and snow in that Mt. Hood region while a cool upper trough settles into the Washington Cascades, continuing generally light snow shower activity at lower snow levels. Flow switches more northerly Thursday night and shower activity diminishes with Friday looking to be mostly sunny and fair.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Snow Level | 2500' - 3500' | 3000' - 4000' | 3500' - 4500' | |
| Thursday | Snow Level | 2000' - 3000' | 2000' - 3000' | 3000' - 4000' | |
| Thursday Night | Snow Level | 2500' - 3500' | 2500' - 3500' | 3000' - 4000' | |
| Friday | Freezing Level | 3500' - 5500' | 3500' - 5500' | 3000' - 5000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Snow Level 2500' - 3500' |
| Thursday |
Snow Level 2000' - 3000' |
| Thursday Night |
Snow Level 2500' - 3500' |
| Friday |
Freezing Level 3500' - 5500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Snow Level 3000' - 4000' |
| Thursday |
Snow Level 2000' - 3000' |
| Thursday Night |
Snow Level 2500' - 3500' |
| Friday |
Freezing Level 3500' - 5500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday |
Snow Level 3000' - 4000' |
| Thursday Night |
Snow Level 3000' - 4000' |
| Friday |
Freezing Level 3000' - 5000' |
* 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 Apr 8, 2019
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