Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Thursday night through Saturday
A low-pressure area in the north Pacific is spawning a series of shortwave troughs that will impact our region. The first is relatively weak and will bring moisture up from the south out ahead of it tonight, with the volcanoes favored for rain and snow with amounts up to about 0.5" of snow water equivalent and snow levels 5500-6000 ft.
Storminess should increase tomorrow as the second feature brings increased rain/snow and moderate to occasionally strong southerly winds as it crosses the region on Friday afternoon with virtually with only a slight let-up in precipitation between disturbances. This system will come in on a cooling trend with snow levels dropping to near pass level by Saturday morning.
Moving into the future, the models have a significant disagreement in the timing and strength of the weather systems. What we can say is that we expect periods of moderate to strong winds, low elevation rain, significant mountain snow in some areas, and fluctuating snow levels. Disturbances are likely to arrive on SW flow Saturday, but it's strength and the associated moisture varies greatly from model to model
Weather Forecast
Hurricane Ridge
| Thursday Night | Increasing very light to light rain and snow. Mild. Light increasing to moderate wind. |
| Friday | Increasing light to occasionally moderate rain and snow. Slightly cooler. Increasing moderate wind. |
Mt. Baker
| Thursday Night | Very light rain and high elevation snow arriving by morning. Mild. Increasing light to moderate wind. |
| Friday | Light to moderate rain and snow. Slightly cooler. Increasing moderate wind. |
Washington Pass and Leavenworth
| Thursday Night | Increasing mid and high-level clouds, lowering and thickening with very light rain and snow arriving from the south by morning. Mild. Light winds. |
| Friday | Periods of light rain and snow, increasing late in the day. Increasing moderate winds. |
Stevens and Snoqualmie Pass
| Thursday Night | Cloudy with light rain and high elevation snow arriving in the overnight hours. Light E wind at pass level and light to moderate winds increasing at 5000 ft. |
| Friday | Periods of light rain and snow. Light E wind at pass level in the morning becoming variable in the afternoon and increasing moderate winds at 5000 ft. |
Mt. Rainier, Crystal and White Pass
| Thursday Night | Cloudy with increasing light rain and snow, heaviest at Paradise Light to moderate winds increasing at 5000 ft. |
| Friday | Moderate rain and snow. Increasing moderate winds. |
Mt. Hood
| Thursday Night | Increasing moderate rain and snow. Increasing light to moderate winds. |
| Friday | Light rain and snow in the morning increasing to moderate in the afternoon. Moderate winds increasing to moderate to strong in the afternoon. |
Issued: 2:58 PM PDT Thursday, April 4, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Thursday Evening | Snow Level * | 5500' | 6000' | 6500' | 6000' | 6000' | 6000' | 6000' | 6000' |
| Thursday Night | Snow Level * | 5500' | 6000' | 5500' | 6000' | 6000' | 6000' | 6000' | 6000' |
| Friday Morning | Snow Level * | 5000' | 5000' | 5000' | 5000' | 5000' | 5000' | 5000' | 5500' |
| Friday Afternoon | Snow Level | 4500' | 5000' | 5500' | 5500' | 5500' | 5000' | 5000' | 5000' |
| Friday Evening | Snow Level | 3500' | 4000' | 5000' | 4500' | 4000' | 4000' | 3500' | 4000' |
| Friday Night | Snow Level | 3500' | 3000' | 2500' | 3500' | 3000' | 3000' | 3000' | 3500' |
| Saturday Morning | Snow Level * | 3500' | 3000' | 2500' | 3000' | 3000' | 3000' | 3000' | 4000' |
| Saturday Afternoon | Snow Level | 3500' | 4000' | 4000' | 4000' | 4000' | 4000' | 4000' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening |
Snow Level 5500' (Easterly Flow *) |
| Thursday Night |
Snow Level 5500' (Easterly Flow *) |
| Friday Morning |
Snow Level 5000' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 4500' |
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Snow Level 3500' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening |
Snow Level 6000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6000' (Easterly Flow *) |
| Friday Morning |
Snow Level 5000' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5000' |
| Friday Evening |
Snow Level 4000' |
| Friday Night |
Snow Level 3000' |
| Saturday Morning |
Snow Level 3000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4000' |
| Washington Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 6500' (Easterly Flow *) |
| Thursday Night |
Snow Level 5500' (Easterly Flow *) |
| Friday Morning |
Snow Level 5000' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5500' |
| Friday Evening |
Snow Level 5000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4000' |
| Leavenworth | Elevation |
|---|---|
| Thursday Evening |
Snow Level 6000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6000' (Easterly Flow *) |
| Friday Morning |
Snow Level 5000' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5500' |
| Friday Evening |
Snow Level 4500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Snow Level 3000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4000' |
| Stevens Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 6000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6000' (Easterly Flow *) |
| Friday Morning |
Snow Level 5000' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5500' |
| Friday Evening |
Snow Level 4000' |
| Friday Night |
Snow Level 3000' |
| Saturday Morning |
Snow Level 3000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 6000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6000' (Easterly Flow *) |
| Friday Morning |
Snow Level 5000' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5000' |
| Friday Evening |
Snow Level 4000' |
| Friday Night |
Snow Level 3000' |
| Saturday Morning |
Snow Level 3000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Evening |
Snow Level 6000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6000' (Easterly Flow *) |
| Friday Morning |
Snow Level 5000' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5000' |
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 3000' |
| Saturday Morning |
Snow Level 3000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4000' |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening |
Snow Level 6000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6000' (Easterly Flow *) |
| Friday Morning |
Snow Level 5500' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5000' |
| Friday Evening |
Snow Level 4000' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Snow Level 4000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4500' |
* 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
| Thursday Night | Saturday | Saturday Night | Saturday | |
|---|---|---|---|---|
| 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 | 0.25 - 0.50 |
| Mt Baker Ski Area | LT 0.10 | 0.50 | 0.50 | 0.25 |
| Washington Pass | LT 0.10 | 0.25 | LT 0.25 | 0.25 |
| Leavenworth | LT 0.10 | LT 0.25 | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | 0.25 | LT 0.25 | LT 0.25 |
| Snoqualmie Pass | LT 0.10 | 0.25 - 0.50 | LT 0.25 | LT 0.25 |
| Mission Ridge | LT 0.10 | 0.25 | LT 0.10 | LT 0.25 |
| Crystal Mt | LT 0.10 | 0.25 - 0.50 | LT 0.10 | 0.25 |
| Paradise | 0.25 - 0.50 | 0.50 - 0.75 | 0.25 | 0.25 |
| White Pass | LT 0.10 | 0.25 | LT 0.25 | LT 0.25 |
| Mt Hood Meadows | 0.25 - 0.50 | 0.50 - 0.75 | LT 0.10 | 0.25 |
| Timberline | 0.50 | 0.50 - 0.75 | LT 0.10 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.25 |
| Saturday Night | LT 0.25 |
| Saturday | 0.25 - 0.50 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.50 |
| Saturday Night | 0.50 |
| Saturday | 0.25 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.25 |
| Saturday Night | LT 0.25 |
| Saturday | 0.25 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.25 |
| Saturday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.25 |
| Saturday Night | LT 0.25 |
| Saturday | LT 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.25 - 0.50 |
| Saturday Night | LT 0.25 |
| Saturday | LT 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.25 |
| Saturday Night | LT 0.10 |
| Saturday | LT 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.25 - 0.50 |
| Saturday Night | LT 0.10 |
| Saturday | 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Thursday Night | 0.25 - 0.50 |
| Saturday | 0.50 - 0.75 |
| Saturday Night | 0.25 |
| Saturday | 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.25 |
| Saturday Night | LT 0.25 |
| Saturday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Thursday Night | 0.25 - 0.50 |
| Saturday | 0.50 - 0.75 |
| Saturday Night | LT 0.10 |
| Saturday | 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Thursday Night | 0.50 |
| Saturday | 0.50 - 0.75 |
| Saturday Night | LT 0.10 |
| Saturday | 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: 2:58 PM PDT Thursday, April 4, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Evening | SSE 10 - 20 | SSE 10 - 20 | ESE 5 - 15 | ESE 5 - 15 | S 5 - 15 |
| Thursday Night | S 20 - 30 | SE 20 - 30 | ESE 10 - 20 | SSE 10 - 20 | SW 15 - 25 |
| Friday Morning | S 20 - 30 | SSE 20 - 30 | S 15 - 25 | S 15 - 25 | S 15 - 25 |
| Friday Afternoon | SSW 25 - 35 | S 20 - 30 | WSW 20 - 30 | SW 20 - 30 | WSW 25 - 35 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening | SSE 10 - 20 |
| Thursday Night | S 20 - 30 |
| Friday Morning | S 20 - 30 |
| Friday Afternoon | SSW 25 - 35 |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening | SSE 10 - 20 |
| Thursday Night | SE 20 - 30 |
| Friday Morning | SSE 20 - 30 |
| Friday Afternoon | S 20 - 30 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening | ESE 5 - 15 |
| Thursday Night | ESE 10 - 20 |
| Friday Morning | S 15 - 25 |
| Friday Afternoon | WSW 20 - 30 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday Evening | ESE 5 - 15 |
| Thursday Night | SSE 10 - 20 |
| Friday Morning | S 15 - 25 |
| Friday Afternoon | SW 20 - 30 |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening | S 5 - 15 |
| Thursday Night | SW 15 - 25 |
| Friday Morning | S 15 - 25 |
| Friday Afternoon | WSW 25 - 35 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday Evening | SSE 10 - 20 |
| Thursday Night | S 20 - 30 |
| Friday Morning | S 20 - 30 |
| Friday Afternoon | SSW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | SSE 10 - 20 |
| Thursday Night | SE 20 - 30 |
| Friday Morning | SSE 20 - 30 |
| Friday Afternoon | S 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | ESE 5 - 15 |
| Thursday Night | ESE 10 - 20 |
| Friday Morning | S 15 - 25 |
| Friday Afternoon | WSW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | ESE 5 - 15 |
| Thursday Night | SSE 10 - 20 |
| Friday Morning | S 15 - 25 |
| Friday Afternoon | SW 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | S 5 - 15 |
| Thursday Night | SW 15 - 25 |
| Friday Morning | S 15 - 25 |
| Friday Afternoon | WSW 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Evening | SSE 15 - 25 | SSE 5 - 15 | SSW 15 - 25 | SSW 15 - 25 | SSW 10 - 20 |
| Thursday Night | S 20 - 30 | S 10 - 20 | S 20 - 30 | S 20 - 30 | SSW 35 - 50 |
| Friday Morning | S 30 - 45 | S 15 - 25 | SSW 25 - 35 | SSW 25 - 35 | SSW 25 - 35 |
| Friday Afternoon | S 35 - 50 | S 20 - 30 | SSW 30 - 45 | SSW 40 - 60 | SW 40 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | SSE 15 - 25 |
| Thursday Night | S 20 - 30 |
| Friday Morning | S 30 - 45 |
| Friday Afternoon | S 35 - 50 |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday Evening | SSE 5 - 15 |
| Thursday Night | S 10 - 20 |
| Friday Morning | S 15 - 25 |
| Friday Afternoon | S 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | SSW 15 - 25 |
| Thursday Night | S 20 - 30 |
| Friday Morning | SSW 25 - 35 |
| Friday Afternoon | SSW 30 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | SSW 15 - 25 |
| Thursday Night | S 20 - 30 |
| Friday Morning | SSW 25 - 35 |
| Friday Afternoon | SSW 40 - 60 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | SSW 10 - 20 |
| Thursday Night | SSW 35 - 50 |
| Friday Morning | SSW 25 - 35 |
| Friday Afternoon | SW 40 - 60 |
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: 2:58 PM PDT Thursday, April 4, 2019
Extended Weather Synopsis for Saturday night through Saturday
The issues of timing and uncertainty with the storm systems continue. Saturday night will bring another active storm system with a warming trend. Subtropical moisture may make it into the southern parts of the forecast area on Sunday, with the potential for significant rainfall to higher elevations in some areas as a front may stall over northern Oregon. Models tend to agree that a trough will move onshore with more unsettled and slightly cooler (near normal) temperatures by Monday afternoon.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Saturday Night | Snow Level | 3000' - 5000' | 3500' - 5500' | 4500' - 6500' | |
| Sunday | Snow Level | 3000' - 5000' | 3500' - 5500' | 4500' - 6500' | |
| Sunday Night | Snow Level | 3000' - 5000' | 4000' - 6000' | 4000' - 6000' | |
| Monday | Snow Level | 3000' - 4000' | 4000' - 5000' | 5000' - 6000' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Night |
Snow Level 3000' - 5000' |
| Sunday |
Snow Level 3000' - 5000' |
| Sunday Night |
Snow Level 3000' - 5000' |
| Monday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Night |
Snow Level 3500' - 5500' |
| Sunday |
Snow Level 3500' - 5500' |
| Sunday Night |
Snow Level 4000' - 6000' |
| Monday |
Snow Level 4000' - 5000' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Night |
Snow Level 4500' - 6500' |
| Sunday |
Snow Level 4500' - 6500' |
| Sunday Night |
Snow Level 4000' - 6000' |
| Monday |
Snow Level 5000' - 6000' |
* 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 4, 2019
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