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 Tuesday
The next frontal wave developing along the quasi-stationary frontal boundary that has been delivering significant moisture to the Mt. Hood area with light to moderate amounts for the Washington Cascades will arrive tonight. Another 1"+ of water is possible for Mt. Hood stations through Monday morning. Snow levels that slipped back down to 6000' this afternoon at Mt. Hood should rise again overnight with another round of strong winds as warm front moisture moves over the area.
What's a bit different about this round (the recent poor forecast confidence remains the same), is that the parent upper level trough will dig offshore, allowing the surface low to track along the Washington Coast on Monday, and cut-off the frontal boundary from its moisture source. The upshot is the light rain and snow should spread into the southern Washington Cascades overnight with showers spreading into all regions during the day on Monday as the low weakens and moves inland. This should keep mainly cloudy conditions in place on Monday.
Showers should taper down Monday night with a broad upper level trough moving inland and weak ridging building offshore. Moderate onshore flow on Tuesday along with weak upper level ridging offshore should translate into cool, cloudy conditions for the west slopes of the Cascades, Olympics and Mt. Hood with showers likely. Sunnier and drier conditions are likely further east of the Cascade crest in this pattern.
Weather Forecast
Hurricane Ridge
| Sunday Night | Partly cloudy in the evening, becoming cloudy overnight with a chance of light rain and snow after midnight. |
| Monday | Cloudy with light to occasionally moderate rain and snow showers. |
Mt. Baker
| Sunday Night | Partly to mostly cloudy, becoming cloudy late. |
| Monday | Cloudy with light rain and snow showers mainly in the afternoon. |
Washington Pass and Leavenworth
| Sunday Night | Partly to mostly cloudy, becoming cloudy with a chance of light rain and snow Leavenworth area late. |
| Monday | Cloudy in the morning with light rain and snow showers in the afternoon. |
Stevens and Snoqualmie Pass
| Sunday Night | Mostly cloudy in the evening, becoming cloudy after midnight with light rain and snow developing late. Light east wind at Pass level. |
| Monday | Cloudy with light to occasionally moderate rain and snow showers increasing in the afternoon. Light east winds at Pass level becoming variable in the afternoon. |
Mt. Rainier, Crystal and White Pass
| Sunday Night | Cloudy with light to occasionally moderate rain and snow developing after midnight. |
| Monday | Light to occasionally moderate rain and snow showers. |
Mt. Hood
| Sunday Night | Moderate to occasionally heavy rain and snow. Becoming very windy overnight. Slight warming trend. |
| Monday | Light to moderate rain and snow showers, heaviest in the morning. |
Issued: 1:52 PM PDT Sunday, April 7, 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 | 4500' | 4000' | 4500' | 4500' | 4500' | 4500' | 5000' | 7000' |
| Sunday Night | Snow Level | 4500' | 4500' | 4500' | 4500' | 4500' | 4500' | 5000' | 7500' |
| Monday Morning | Snow Level | 4501' | 4500' | 4500' | 5000' | 5000' | 5000' | 6000' | 7000' |
| Monday Afternoon | Snow Level | 5000' | 5000' | 5500' | 6000' | 6000' | 6000' | 6000' | 7000' |
| Monday Evening | Snow Level | 5000' | 5000' | 5000' | 5000' | 5000' | 5000' | 5500' | 5500' |
| Monday Night | Snow Level | 4000' | 4000' | 4000' | 4000' | 4000' | 4000' | 4500' | 4500' |
| Tuesday Morning | Snow Level | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' |
| Tuesday Afternoon | Snow Level | 4000' | 4000' | 4500' | 4500' | 4000' | 4000' | 4000' | 4000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4500' |
| Sunday Night |
Snow Level 4500' |
| Monday Morning |
Snow Level 4501' |
| Monday Afternoon |
Snow Level 5000' |
| Monday Evening |
Snow Level 5000' |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 4500' |
| Monday Morning |
Snow Level 4500' |
| Monday Afternoon |
Snow Level 5000' |
| Monday Evening |
Snow Level 5000' |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Washington Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4500' |
| Sunday Night |
Snow Level 4500' |
| Monday Morning |
Snow Level 4500' |
| Monday Afternoon |
Snow Level 5500' |
| Monday Evening |
Snow Level 5000' |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4500' |
| Leavenworth | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4500' |
| Sunday Night |
Snow Level 4500' |
| Monday Morning |
Snow Level 5000' |
| Monday Afternoon |
Snow Level 6000' |
| Monday Evening |
Snow Level 5000' |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4500' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4500' |
| Sunday Night |
Snow Level 4500' |
| Monday Morning |
Snow Level 5000' |
| Monday Afternoon |
Snow Level 6000' |
| Monday Evening |
Snow Level 5000' |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4500' |
| Sunday Night |
Snow Level 4500' |
| Monday Morning |
Snow Level 5000' |
| Monday Afternoon |
Snow Level 6000' |
| Monday Evening |
Snow Level 5000' |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Evening |
Snow Level 5000' |
| Sunday Night |
Snow Level 5000' |
| Monday Morning |
Snow Level 6000' |
| Monday Afternoon |
Snow Level 6000' |
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 4500' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening |
Snow Level 7000' |
| Sunday Night |
Snow Level 7500' |
| Monday Morning |
Snow Level 7000' |
| Monday Afternoon |
Snow Level 7000' |
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 4500' |
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 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.
Precipitation Forecast
| Sunday Night | Tuesday | Tuesday Night | Tuesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | 0.25 | LT 0.25 | LT 0.10 |
| Mt Baker Ski Area | 0 | LT 0.25 | 0.25 - 0.50 | LT 0.10 |
| Washington Pass | 0 | LT 0.10 | LT 0.10 | LT 0.10 |
| Leavenworth | 0 | LT 0.25 | LT 0.10 | 0 |
| Stevens Pass | LT 0.10 | LT 0.25 | LT 0.25 | 0.25 |
| Snoqualmie Pass | LT 0.10 | 0.25 | 0.25 | 0.25 |
| Mission Ridge | LT 0.10 | LT 0.25 | LT 0.10 | 0 |
| Crystal Mt | 0.25 | 0.25 | LT 0.25 | LT 0.25 |
| Paradise | 0.25 | 0.25 - 0.50 | 0.25 | 0.25 |
| White Pass | 0.25 | 0.25 | LT 0.25 | LT 0.25 |
| Mt Hood Meadows | 0.75 -1.00 | 0.50 | 0.25 | LT 0.25 |
| Timberline | 1.00 - 1.50 | 0.50 - 0.75 | 0.25 - 0.50 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Tuesday | 0.25 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Tuesday | LT 0.25 |
| Tuesday Night | 0.25 - 0.50 |
| Tuesday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Tuesday | LT 0.10 |
| Tuesday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Tuesday | LT 0.25 |
| Tuesday Night | LT 0.10 |
| Tuesday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Tuesday | LT 0.25 |
| Tuesday Night | LT 0.25 |
| Tuesday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Tuesday | 0.25 |
| Tuesday Night | 0.25 |
| Tuesday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Tuesday | LT 0.25 |
| Tuesday Night | LT 0.10 |
| Tuesday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 |
| Tuesday | 0.25 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 |
| Tuesday | 0.25 - 0.50 |
| Tuesday Night | 0.25 |
| Tuesday | 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 |
| Tuesday | 0.25 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday Night | 0.75 -1.00 |
| Tuesday | 0.50 |
| Tuesday Night | 0.25 |
| Tuesday | LT 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday Night | 1.00 - 1.50 |
| Tuesday | 0.50 - 0.75 |
| Tuesday Night | 0.25 - 0.50 |
| Tuesday | 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: 1:52 PM PDT Sunday, April 7, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | SE 0 - 10 | S 0 - 10 | S 0 - 10 | S 0 - 10 | S 10 - 20 |
| Sunday Night | SE 5 - 15 | SE 0 - 10 | SE 0 - 10 | SE 0 - 10 | SW 25 - 35 |
| Monday Morning | SE 0 - 10 | SE 10 - 20 | SSW 5 - 15 | SW 10 - 20 | SW 10 - 20 |
| Monday Afternoon | SW 5 - 15 | S 5 - 15 | SW 5 - 15 | SW 10 - 20 | SW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening | SE 0 - 10 |
| Sunday Night | SE 5 - 15 |
| Monday Morning | SE 0 - 10 |
| Monday Afternoon | SW 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening | S 0 - 10 |
| Sunday Night | SE 0 - 10 |
| Monday Morning | SE 10 - 20 |
| Monday Afternoon | S 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | S 0 - 10 |
| Sunday Night | SE 0 - 10 |
| Monday Morning | SSW 5 - 15 |
| Monday Afternoon | SW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Evening | S 0 - 10 |
| Sunday Night | SE 0 - 10 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | S 10 - 20 |
| Sunday Night | SW 25 - 35 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Evening | SE 0 - 10 |
| Sunday Night | SE 5 - 15 |
| Monday Morning | SE 0 - 10 |
| Monday Afternoon | SW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | S 0 - 10 |
| Sunday Night | SE 0 - 10 |
| Monday Morning | SE 10 - 20 |
| Monday Afternoon | S 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | S 0 - 10 |
| Sunday Night | SE 0 - 10 |
| Monday Morning | SSW 5 - 15 |
| Monday Afternoon | SW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | S 0 - 10 |
| Sunday Night | SE 0 - 10 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | S 10 - 20 |
| Sunday Night | SW 25 - 35 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 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 Evening | WSW 10 - 20 | W 10 - 20 | W 10 - 20 | SW 15 - 25 | SW 35 - 45 |
| Sunday Night | S 10 - 20 | S 10 - 20 | SW 20 - 30 | SW 40 - 50 | SW 50 - 60 |
| Monday Morning | SW 20 - 30 | SW 25 - 35 | SW 30 - 40 | SW 30 - 40 | SW 35 - 45 |
| Monday Afternoon | SW 20 - 30 | SW 15 - 25 | SW 20 - 30 | SW 20 - 30 | SW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | S 10 - 20 |
| Monday Morning | SW 20 - 30 |
| Monday Afternoon | SW 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Evening | W 10 - 20 |
| Sunday Night | S 10 - 20 |
| Monday Morning | SW 25 - 35 |
| Monday Afternoon | SW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | W 10 - 20 |
| Sunday Night | SW 20 - 30 |
| Monday Morning | SW 30 - 40 |
| Monday Afternoon | SW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | SW 15 - 25 |
| Sunday Night | SW 40 - 50 |
| Monday Morning | SW 30 - 40 |
| Monday Afternoon | SW 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | SW 35 - 45 |
| Sunday Night | SW 50 - 60 |
| Monday Morning | SW 35 - 45 |
| Monday Afternoon | SW 25 - 35 |
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: 1:52 PM PDT Sunday, April 7, 2019
Extended Weather Synopsis for Tuesday night through Tuesday
Broad upper level ridging amplifying well offshore will change the upper level flow pattern to NW flow aloft. This should allow a series of quick moving disturbances to move through the Pacific Northwest starting Wednesday and potentially lasting through next weekend. This pattern should produce a fair amount of precipitation for the west slopes of the Cascades, particularly the central Cascades. No surprise as of late - details in timing and strength of individual weather systems is poor.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Night | Snow Level | 3000' - 4000' | 3000' - 4000' | 3000' - 4000' | |
| Wednesday | Snow Level | 3000' - 4000' | 3000' - 4000' | 3500' - 4500' | |
| Wednesday Night | Snow Level | 2500' - 3500' | 3000' - 4000' | 3500' - 4500' | |
| Thursday | Snow Level | 3000' - 4000' | 3500' - 4500' | 4000' - 5000' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 3000' - 4000' |
| Wednesday Night |
Snow Level 2500' - 3500' |
| Thursday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 3000' - 4000' |
| Wednesday Night |
Snow Level 3000' - 4000' |
| Thursday |
Snow Level 3500' - 4500' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 3500' - 4500' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday |
Snow Level 4000' - 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 7, 2019
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