Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Saturday night through Tuesday
A broad upper level low in the NE Pacific will direct a winter-like strength jet stream into the Pacific Northwest over the next few days. Just as post-frontal showers wind down this evening another frontal system developing along the jet will rapidly spread precipitation into Oregon this evening and most of Washington by early Sunday morning. Forecast models are in good agreement that Mt. Hood will bear the brunt of this storm in terms of precipitation, warming, and winds. Less certainty surrounds how much significant precipitation will push north into the south and central Washington Cascades through Sunday morning. The Olympics and the north Cascades should receive only light accumulations.
After the low weakens and traverses the Columbia River Gorge Sunday morning, isolated showers and along with a warming trend should ensue for the Washington Cascades. Yet another low pressure system developing along the quasi-stationary frontal boundary will begin to spread warm frontal moisture into the Mt. Hood area Sunday afternoon. So perhaps there will be a mid-day lull for Mt. Hood but generally moderate and steady precipitation is expected through Sunday.
Poor forecast confidence extends to Sunday night and Monday. The GFS takes the low pressure northeast and quickly inland Sunday night with leftover showers for Monday while other models curl the low along the coast Sunday night extending the stormier patter for another 12 hours.
Weather Forecast
Hurricane Ridge
| Saturday Night | Light to occasionally moderate rain and snow showers early this evening becoming periods of light rain and snow overnight. |
| Sunday | Mostly cloudy with scattered light rain and snow showers late morning becoming partly sunny in the afternoon. Warming trend. |
Mt. Baker
| Saturday Night | Light to moderate rain and snow showers early this evening becoming periods of light rain and snow overnight. |
| Sunday | Periods of light rain and snow in the morning becoming mostly cloudy with scattered light rain and snow showers late morning. Warming trend. |
Washington Pass and Leavenworth
| Saturday Night | Mostly cloudy with light scattered rain and snow showers this evening becoming periods of light rain and snow late overnight. |
| Sunday | Light rain and snow in the morning becoming mostly cloudy with scattered light rain and snow showers late morning. Warming trend. |
Stevens and Snoqualmie Pass
| Saturday Night | Mostly cloudy with light to occasionally moderate rain and snow showers this evening becoming periods of light rain and snow overnight. Moderate west winds at Pass level. |
| Sunday | Light rain and snow in the morning becoming mostly cloudy with scattered light rain and snow showers late morning. Warming trend. Variable Pass level winds. |
Mt. Rainier, Crystal and White Pass
| Saturday Night | Mostly cloudy with light to occasionally moderate rain and snow showers this evening becoming periods of light to moderate rain and snow overnight. |
| Sunday | Light to occasionally moderate rain and snow in the morning becoming mostly cloudy with scattered light rain and snow showers late morning. Warming trend. |
Mt. Hood
| Saturday Night | Light to occasionally moderate rain and snow showers this evening becoming moderate rain and snow overnight. Warming trend. Very windy. |
| Sunday | Moderate rain and snow, possibly lighter mid-day. Strong winds decreasing slightly in the afternoon. |
Issued: 2:31 PM PDT Saturday, April 6, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Evening | Snow Level | 3000' | 3000' | 3000' | 3000' | 3000' | 3000' | 3000' | 5000' |
| Saturday Night | Snow Level | 3000' | 3000' | 3000' | 3000' | 3000' | 3000' | 3500' | 6000' |
| Sunday Morning | Snow Level | 3500' | 3500' | 3500' | 3500' | 4000' | 4000' | 5000' | 6500' |
| Sunday Afternoon | Snow Level | 4500' | 5000' | 5500' | 5500' | 5000' | 5000' | 5500' | 7000' |
| Sunday Evening | Snow Level | 4000' | 4000' | 4000' | 5000' | 4500' | 5000' | 5500' | 7000' |
| Sunday Night | Snow Level | 4000' | 4000' | 4000' | 5000' | 4500' | 5000' | 5500' | 7000' |
| Monday Morning | Snow Level | 4000' | 4000' | 4000' | 5500' | 4500' | 5500' | 5500' | 6500' |
| Monday Afternoon | Snow Level | 5000' | 4500' | 5000' | 5000' | 5000' | 5000' | 5500' | 6500' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 4500' |
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 4000' |
| Monday Morning |
Snow Level 4000' |
| Monday Afternoon |
Snow Level 5000' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 4000' |
| Monday Morning |
Snow Level 4000' |
| Monday Afternoon |
Snow Level 4500' |
| Washington Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 5500' |
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 4000' |
| Monday Morning |
Snow Level 4000' |
| Monday Afternoon |
Snow Level 5000' |
| Leavenworth | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 5500' |
| Sunday Evening |
Snow Level 5000' |
| Sunday Night |
Snow Level 5000' |
| Monday Morning |
Snow Level 5500' |
| Monday Afternoon |
Snow Level 5000' |
| Stevens Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 4500' |
| Sunday Night |
Snow Level 4500' |
| Monday Morning |
Snow Level 4500' |
| Monday Afternoon |
Snow Level 5000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 3000' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Snow Level 5000' |
| Sunday Evening |
Snow Level 5000' |
| Sunday Night |
Snow Level 5000' |
| Monday Morning |
Snow Level 5500' |
| Monday Afternoon |
Snow Level 5000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Evening |
Snow Level 3000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Snow Level 5000' |
| Sunday Afternoon |
Snow Level 5500' |
| Sunday Evening |
Snow Level 5500' |
| Sunday Night |
Snow Level 5500' |
| Monday Morning |
Snow Level 5500' |
| Monday Afternoon |
Snow Level 5500' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening |
Snow Level 5000' |
| Saturday Night |
Snow Level 6000' |
| Sunday Morning |
Snow Level 6500' |
| Sunday Afternoon |
Snow Level 7000' |
| Sunday Evening |
Snow Level 7000' |
| Sunday Night |
Snow Level 7000' |
| Monday Morning |
Snow Level 6500' |
| Monday Afternoon |
Snow Level 6500' |
* 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
| Saturday Night | Tuesday | Tuesday Night | Tuesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0.25 | LT 0.10 | 0.25 | LT 0.25 |
| Mt Baker Ski Area | 0.50 | LT 0.25 | LT 0.25 | LT 0.25 |
| Washington Pass | LT 0.10 | LT 0.10 | LT 0.25 | LT 0.10 |
| Leavenworth | LT 0.10 | LT 0.10 | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.25 | 0.25 | LT 0.25 | LT 0.25 |
| Snoqualmie Pass | 0.25 - 0.50 | 0.25 | LT 0.25 | LT 0.25 |
| Mission Ridge | LT 0.10 | LT 0.25 | LT 0.10 | LT 0.10 |
| Crystal Mt | 0.25 - 0.50 | 0.50 | 0.25 | LT 0.10 |
| Paradise | 0.50 | 0.50 | 0.25 - 0.50 | LT 0.25 |
| White Pass | 0.25 | 0.50 | 0.25 | LT 0.10 |
| Mt Hood Meadows | 0.75 | 1.00 | 0.75 | 0.25 - 0.50 |
| Timberline | 1.00 - 1.50 | 1.50 | 1.00 - 1.50 | 0.25 - 0.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0.25 |
| Tuesday | LT 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Saturday Night | 0.50 |
| Tuesday | LT 0.25 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.25 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Tuesday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.25 |
| Tuesday | 0.25 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0.25 - 0.50 |
| Tuesday | 0.25 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | LT 0.10 |
| Tuesday | LT 0.25 |
| Tuesday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Saturday Night | 0.25 - 0.50 |
| Tuesday | 0.50 |
| Tuesday Night | 0.25 |
| Tuesday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Saturday Night | 0.50 |
| Tuesday | 0.50 |
| Tuesday Night | 0.25 - 0.50 |
| Tuesday | LT 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0.25 |
| Tuesday | 0.50 |
| Tuesday Night | 0.25 |
| Tuesday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Saturday Night | 0.75 |
| Tuesday | 1.00 |
| Tuesday Night | 0.75 |
| Tuesday | 0.25 - 0.50 |
| Timberline | Precipitation Forecast |
|---|---|
| Saturday Night | 1.00 - 1.50 |
| Tuesday | 1.50 |
| Tuesday Night | 1.00 - 1.50 |
| Tuesday | 0.25 - 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: 2:31 PM PDT Saturday, April 6, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Evening | SW 15 - 25 | SW 15 - 25 | SW 15 - 25 | SW 10 - 20 | SW 10 - 20 |
| Saturday Night | SE 10 - 20 | S 5 - 15 | S 5 - 15 | SW 10 - 20 | SSW 25 - 35 |
| Sunday Morning | SE 5 - 15 | S 5 - 15 | S 5 - 15 | SW 10 - 20 | SW 20 - 30 |
| Sunday Afternoon | S 5 - 15 | SE 5 - 15 | SW 5 - 15 | SW 5 - 15 | SW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | SE 10 - 20 |
| Sunday Morning | SE 5 - 15 |
| Sunday Afternoon | S 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | S 5 - 15 |
| Sunday Morning | S 5 - 15 |
| Sunday Afternoon | SE 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | S 5 - 15 |
| Sunday Morning | S 5 - 15 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | SW 10 - 20 |
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | SSW 25 - 35 |
| Sunday Morning | SW 20 - 30 |
| Sunday Afternoon | SW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | SE 10 - 20 |
| Sunday Morning | SE 5 - 15 |
| Sunday Afternoon | S 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | S 5 - 15 |
| Sunday Morning | S 5 - 15 |
| Sunday Afternoon | SE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | SW 15 - 25 |
| Saturday Night | S 5 - 15 |
| Sunday Morning | S 5 - 15 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | SW 10 - 20 |
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | SW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | SW 10 - 20 |
| Saturday Night | SSW 25 - 35 |
| Sunday Morning | SW 20 - 30 |
| Sunday 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 | |
|---|---|---|---|---|---|
| Saturday Evening | SW 20 - 30 | SW 25 - 35 | SW 35 - 45 | SW 35 - 45 | SW 40 - 50 |
| Saturday Night | S 10 - 20 | S 10 - 20 | SW 35 - 50 | SW 50 - 60 | SW 50 - 60 |
| Sunday Morning | SW 10 - 20 | SW 10 - 20 | SW 25 - 35 | SW 30 - 40 | SW 40 - 50 |
| Sunday Afternoon | WSW 15 - 25 | W 20 - 30 | W 15 - 25 | WSW 20 - 30 | SW 35 - 45 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | SW 20 - 30 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | WSW 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Evening | SW 25 - 35 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | W 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | SW 35 - 45 |
| Saturday Night | SW 35 - 50 |
| Sunday Morning | SW 25 - 35 |
| Sunday Afternoon | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | SW 35 - 45 |
| Saturday Night | SW 50 - 60 |
| Sunday Morning | SW 30 - 40 |
| Sunday Afternoon | WSW 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | SW 40 - 50 |
| Saturday Night | SW 50 - 60 |
| Sunday Morning | SW 40 - 50 |
| Sunday Afternoon | SW 35 - 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.
Issued: 2:31 PM PDT Saturday, April 6, 2019
Extended Weather Synopsis for Tuesday night through Tuesday
Tuesday should be a break day from significant precipitation with some leftover showers. Broad upper level ridging building well offshore near 150W will allow systems to reach the Pacific Northwest in cooler NW flow aloft. A fast moving but potentially cooler weather system will likely impact the area on Wednesday.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday Night | Snow Level | 3500' - 4500' | 4000' - 5000' | 4500' - 5500' | |
| Tuesday | Snow Level | 4000' - 5000' | 4000' - 5000' | 4500' - 5500' | |
| Tuesday Night | Snow Level | 2500' - 3500' | 2500' - 3500' | 3000' - 4000' | |
| Wednesday | Snow Level | 3000' - 4000' | 3500' - 4500' | 3500' - 4500' |
| Mt. Baker | Elevation |
|---|---|
| Monday Night |
Snow Level 3500' - 4500' |
| Tuesday |
Snow Level 4000' - 5000' |
| Tuesday Night |
Snow Level 2500' - 3500' |
| Wednesday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Night |
Snow Level 4000' - 5000' |
| Tuesday |
Snow Level 4000' - 5000' |
| Tuesday Night |
Snow Level 2500' - 3500' |
| Wednesday |
Snow Level 3500' - 4500' |
| Mt. Hood | Elevation |
|---|---|
| Monday Night |
Snow Level 4500' - 5500' |
| Tuesday |
Snow Level 4500' - 5500' |
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 3500' - 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.
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 6, 2019
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