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 Wednesday
The Pacific Northwest remains between an offshore high pressure and a broad trough east of the Rockies, providing N or NNW flow and dry conditions for much of the upcoming week. The offshore ridge amplifies through Monday and gradually progresses toward the coastline, resulting in a warming trend throughout the forecast period.
With the exit of Saturday's weak disturbance, the drying trend should gradually erode the stratus deck lingering in the southern parts of the forecast area Sunday night. Most locations should experience freezing levels dropping to around 3500-5000 ft overnight, but with clear skies and light winds, a very shallow inversion will bring below-freezing temperatures to valley locations.
The inversion should mix out with sunshine early on Sunday, bringing a mostly sunny day with scattered clouds developing late in the day. Temperatures should be warmer than Saturday, with freezing levels topping out in the 5500-6000 ft range.
Sunday night may be partly cloudy, with a weak and dry disturbance possibly brushing the area.
Monday should be sunny with temperatures continuing to climb and freezing levels in the 6000-7000 ft range.
Weather Forecast
Hurricane Ridge
| Saturday Night | Clear skies. |
| Sunday | Sunny. |
Mt. Baker
| Saturday Night | Clear skies. A shallow inversion developing. |
| Sunday | Sunny in the morning with partly cloudy skies developing late in the day. Inversion mixing out quickly. |
Washington Pass and Leavenworth
| Saturday Night | Clear skies. A shallow inversion developing. |
| Sunday | Sunny in the morning with partly cloudy skies developing late in the day. Inversion mixing out quickly. |
Stevens and Snoqualmie Pass
| Saturday Night | Partly cloudy in the early evening, then clearing skies. A shallow inversion developing. Light W wind s through the Passes in the evening switching E from late evening onwards and gusting moderate. Light winds at 5000 ft. |
| Sunday | Sunny in the morning with scattered clouds developing late in the day. Inversion mixing out quickly. Decreasing light E flow through the Passes switching W by mid-afternoon. Light winds at 5000 ft. |
Mt. Rainier, Crystal and White Pass
| Saturday Night | Partly cloudy with decreasing marine stratus in the evening, then mostly clear skies after midnight. A shallow inversion developing. |
| Sunday | Sunny in the morning with scattered clouds developing late in the day. Inversion mixing out quickly. |
Mt. Hood
| Saturday Night | Partly cloudy. |
| Sunday | A few clouds lingering in the early morning giving way to mostly sunny skies. |
Issued: 2:00 PM PDT Saturday, April 11, 2020
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Evening | Freezing Level | 5500' | 4500' | 4500' | 5000' | 5000' | 5000' | 5500' | 6000' |
| Saturday Night | Freezing Level * | 5000' | 4000' | 3500' | 4000' | 4000' | 4500' | 5000' | 5000' |
| Sunday Morning | Freezing Level * | 5000' | 4500' | 4000' | 4500' | 4500' | 4500' | 5000' | 5500' |
| Sunday Afternoon | Freezing Level | 5500' | 5500' | 5500' | 5500' | 6000' | 6000' | 6000' | 6000' |
| Sunday Evening | Freezing Level | 5000' | 5000' | 4500' | 4500' | 4500' | 5000' | 5000' | 5500' |
| Sunday Night | Freezing Level * | 5000' | 4000' | 3500' | 4500' | 4500' | 4500' | 5000' | 5000' |
| Monday Morning | Freezing Level | 5500' | 4500' | 4500' | 5000' | 5000' | 5000' | 5000' | 5500' |
| Monday Afternoon | Freezing Level | 6500' | 6000' | 6500' | 6500' | 6500' | 6500' | 6500' | 7000' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 5500' |
| Saturday Night |
Freezing Level 5000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 5500' |
| Sunday Evening |
Freezing Level 5000' |
| Sunday Night |
Freezing Level 5000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5500' |
| Monday Afternoon |
Freezing Level 6500' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 4500' |
| Saturday Night |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 5500' |
| Sunday Evening |
Freezing Level 5000' |
| Sunday Night |
Freezing Level 4000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 4500' |
| Monday Afternoon |
Freezing Level 6000' |
| Washington Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 4500' |
| Saturday Night |
Freezing Level 3500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 5500' |
| Sunday Evening |
Freezing Level 4500' |
| Sunday Night |
Freezing Level 3500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 4500' |
| Monday Afternoon |
Freezing Level 6500' |
| Leavenworth | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 5000' |
| Saturday Night |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 5500' |
| Sunday Evening |
Freezing Level 4500' |
| Sunday Night |
Freezing Level 4500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5000' |
| Monday Afternoon |
Freezing Level 6500' |
| Stevens Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 5000' |
| Saturday Night |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 6000' |
| Sunday Evening |
Freezing Level 4500' |
| Sunday Night |
Freezing Level 4500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5000' |
| Monday Afternoon |
Freezing Level 6500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 5000' |
| Saturday Night |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 6000' |
| Sunday Evening |
Freezing Level 5000' |
| Sunday Night |
Freezing Level 4500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5000' |
| Monday Afternoon |
Freezing Level 6500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 5500' |
| Saturday Night |
Freezing Level 5000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 6000' |
| Sunday Evening |
Freezing Level 5000' |
| Sunday Night |
Freezing Level 5000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5000' |
| Monday Afternoon |
Freezing Level 6500' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 6000' |
| Saturday Night |
Freezing Level 5000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 6000' |
| Sunday Evening |
Freezing Level 5500' |
| Sunday Night |
Freezing Level 5000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 5500' |
| Monday Afternoon |
Freezing Level 7000' |
* 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 | Wednesday | Wednesday Night | Wednesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | 0 | 0 |
| Mt Baker Ski Area | 0 | 0 | 0 | 0 |
| Washington Pass | 0 | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | 0 | 0 |
| Snoqualmie Pass | 0 | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | 0 | 0 | 0 | 0 |
| Paradise | 0 | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | 0 | 0 | 0 |
| Timberline | 0 | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
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: 2:00 PM PDT Saturday, April 11, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Evening | NNE 5 - 15 | ENE 5 - 15 | N 0 - 10 | N 0 - 10 | N 5 - 15 |
| Saturday Night | NE 5 - 15 | ENE 5 - 15 | E 0 - 10 | SSE 0 - 10 | E 5 - 15 |
| Sunday Morning | NNE 0 - 10 | ENE 0 - 10 | SE 0 - 10 | SE 0 - 10 | E 5 - 15 |
| Sunday Afternoon | NNW 0 - 10 | N 0 - 10 | WNW 5 - 15 | WNW 5 - 15 | E 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening | NNE 5 - 15 |
| Saturday Night | NE 5 - 15 |
| Sunday Morning | NNE 0 - 10 |
| Sunday Afternoon | NNW 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening | ENE 5 - 15 |
| Saturday Night | ENE 5 - 15 |
| Sunday Morning | ENE 0 - 10 |
| Sunday Afternoon | N 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening | N 0 - 10 |
| Saturday Night | E 0 - 10 |
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | WNW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Evening | N 0 - 10 |
| Saturday Night | SSE 0 - 10 |
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | WNW 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening | N 5 - 15 |
| Saturday Night | E 5 - 15 |
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | E 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Evening | NNE 5 - 15 |
| Saturday Night | NE 5 - 15 |
| Sunday Morning | NNE 0 - 10 |
| Sunday Afternoon | NNW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | ENE 5 - 15 |
| Saturday Night | ENE 5 - 15 |
| Sunday Morning | ENE 0 - 10 |
| Sunday Afternoon | N 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | N 0 - 10 |
| Saturday Night | E 0 - 10 |
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | WNW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | N 0 - 10 |
| Saturday Night | SSE 0 - 10 |
| Sunday Morning | SE 0 - 10 |
| Sunday Afternoon | WNW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | N 5 - 15 |
| Saturday Night | E 5 - 15 |
| Sunday Morning | E 5 - 15 |
| Sunday Afternoon | E 0 - 10 |
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 | N 15 - 25 | N 20 - 30 | N 10 - 20 | NNW 10 - 20 | N 10 - 20 |
| Saturday Night | NNW 10 - 20 | N 15 - 25 | NNW 10 - 20 | NNW 15 - 25 | NNW 15 - 25 |
| Sunday Morning | NNW 10 - 20 | NNW 15 - 25 | NNW 10 - 20 | NNW 10 - 20 | NNW 15 - 25 |
| Sunday Afternoon | N 10 - 20 | NNW 10 - 20 | NNW 10 - 20 | NNW 10 - 20 | NNW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | N 15 - 25 |
| Saturday Night | NNW 10 - 20 |
| Sunday Morning | NNW 10 - 20 |
| Sunday Afternoon | N 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Evening | N 20 - 30 |
| Saturday Night | N 15 - 25 |
| Sunday Morning | NNW 15 - 25 |
| Sunday Afternoon | NNW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | N 10 - 20 |
| Saturday Night | NNW 10 - 20 |
| Sunday Morning | NNW 10 - 20 |
| Sunday Afternoon | NNW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | NNW 10 - 20 |
| Saturday Night | NNW 15 - 25 |
| Sunday Morning | NNW 10 - 20 |
| Sunday Afternoon | NNW 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | N 10 - 20 |
| Saturday Night | NNW 15 - 25 |
| Sunday Morning | NNW 15 - 25 |
| Sunday Afternoon | NNW 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.
Issued: 2:00 PM PDT Saturday, April 11, 2020
Extended Weather Synopsis for Wednesday night through Wednesday
The warming trend continues under the increasing influence of high pressure with clear/sunny skies Monday night into Tuesday with weak systems struggling to erode the dominance of the offshore ridge. Freezing levels may get up to 7000 ft in the north and 10000 ft or so in the south on Tuesday. Models still disagree about the potential for a slightly more pronounced weak disturbance bringing in some clouds and light showers either Tuesday night or Wednesday, but there's a good chance the high pressure will continue to maintain its influence over the region.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday Night | Freezing Level | 5500' - 6500' | 6000' - 7000' | 6500' - 7500' | |
| Tuesday | Freezing Level | 6500' - 7500' | 8000' - 9500' | 8500' - 10500' | |
| Tuesday Night | Freezing Level | 5500' - 6500' | 6500' - 7500' | 7000' - 9000' | |
| Wednesday | Freezing Level | 6000' - 7000' | 6500' - 7500' | 7000' - 8000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Night |
Freezing Level 5500' - 6500' |
| Tuesday |
Freezing Level 6500' - 7500' |
| Tuesday Night |
Freezing Level 5500' - 6500' |
| Wednesday |
Freezing Level 6000' - 7000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Night |
Freezing Level 6000' - 7000' |
| Tuesday |
Freezing Level 8000' - 9500' |
| Tuesday Night |
Freezing Level 6500' - 7500' |
| Wednesday |
Freezing Level 6500' - 7500' |
| Mt. Hood | Elevation |
|---|---|
| Monday Night |
Freezing Level 6500' - 7500' |
| Tuesday |
Freezing Level 8500' - 10500' |
| Tuesday Night |
Freezing Level 7000' - 9000' |
| Wednesday |
Freezing Level 7000' - 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 Apr 10, 2020
The NWAC program is administered by the USDA-Forest Service and operates from the National Weather Service Forecast Office in Seattle. NWAC services are made possible by important collaboration and support from a wide variety of federal, state and private cooperators.