Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Monday & Tuesday
A weak upper and surface ridge moved over the Northwest on Sunday. Judging by the RH's at the NWAC weather stations the clouds didn't let up much west of the Cascade crest but it looks like it was a nice day east of the crest.
A weak front crossed the Northwest Sunday night and spread some light to moderate rain and snow to Mt Hood Sunday night and some light rain and snow to the Olympics and Washington Cascades Monday morning. Temporary decreases in light rain or snow should generally be seen following the front.
A weak upper and surface trough and cool slightly unstable air mass will move east across the Northwest Monday and Monday evening. This will cause bands of showers and a chance of thunderstorms near and west of the Cascade crest. The Sunday afternoon UW WRF model indicates convergence between Mt Baker and Stevens Pass Monday evening.
A weak upper and surface ridge will cross the Northwest and give a break in the weather on Tuesday with some sun and and slightly warmer temperatures.
The next weak surface low pressure system and front will begin to move almost due north along the Oregon coastline Tuesday night causing E-SE crest level flow, increasing clouds and increasing rain and snow in the south Cascades.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday Morning - Monday Afternoon |
Increasing light to occasional moderate showers. Slight chance of a thunderstorm. Moderate alpine winds. |
| Monday Night |
Light showers decreasing and ending. |
| Tuesday Morning - Tuesday Afternoon |
Becoming mostly sunny. |
| Tuesday Night |
Increasing clouds spreading from south to north. Light rain or snow south part after midnight. |
Olympics
| Monday Morning - Monday Afternoon |
Increasing light to occasional moderate showers. Slight chance of a thunderstorm. Moderate alpine winds. |
| Monday Night |
Light showers decreasing and ending. |
| Tuesday Morning - Tuesday Afternoon |
Becoming mostly sunny. |
| Tuesday Night |
Increasing clouds spreading from south to north. Light rain or snow after midnight. |
East slopes of the Washington Cascades
| Monday Morning - Monday Afternoon |
Increasing light showers. Moderate alpine winds. |
| Monday Night |
Light showers decreasing and ending. |
| Tuesday Morning - Tuesday Afternoon |
Mostly sunny. |
| Tuesday Night |
Increasing clouds spreading from south to north. Light rain or snow south part after midnight. |
Mt. Hood Area
| Monday Morning - Monday Afternoon |
Increasing light to occasional moderate showers. Slight chance of a thunderstorm. Moderate alpine winds. |
| Monday Night |
Light showers decreasing and ending. |
| Tuesday Morning - Tuesday Afternoon |
Becoming mostly sunny in the morning. Increasing clouds in the afternoon. |
| Tuesday Night |
Light rain or snow in the evening. Light to moderate rain or snow after midnight. |
Issued: 7:22 AM PDT Monday, April 10, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Morning | Snow Level | 2500' | 2000' | 2000' | ' | ' | 2500' | ' | 3000' |
| Monday Afternoon | Snow Level | 3500' | 3000' | 3000' | ' | ' | 3500' | ' | 4000' |
| Monday Night - Tuesday Morning | Snow Level | 2500' | 2000' | 2000' | ' | ' | 2500' | ' | 3000' |
| Tuesday Afternoon | Freezing Level * | 4500' | 4500' | 4500' | ' | ' | 5000' | ' | 5500' |
| Tuesday Night | Snow Level * | 3500' | 3000' | 3000' | ' | ' | 3500' | ' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Night - Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Freezing Level 4500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 3000' |
| Monday Night - Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Freezing Level 4500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 3000' |
| Monday Night - Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Freezing Level 4500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Night - Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Freezing Level 5000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 4000' |
| Monday Night - Tuesday Morning |
Snow Level 3000' |
| Tuesday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 5000' (Easterly Flow *) |
* 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
| Tuesday | Tuesday | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | LT 0.10 |
| Mt Baker Ski Area | 0 - 0.50 | LT 0.10 |
| Washington Pass | LT 0.25 | LT 0.10 |
| Stevens Pass | 0.25 - 0.50 | LT 0.10 |
| Snoqualmie Pass | 0 - 0.50 | LT 0.10 |
| Mission Ridge | LT 0.25 | LT 0.25 |
| Crystal Mt | LT 0.25 | LT 0.25 |
| Paradise | 0 - 0.50 | LT 0.25 |
| White Pass | LT 0.25 | LT 0.25 |
| Mt Hood Meadows | LT 0.25 | 0.25 - 0.50 |
| Timberline | 0.25 - 0.50 | 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: 7:22 AM PDT Monday, April 10, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | SSW 20 - 30 | SSW 15 - 25 | SW 15 - 25 | --- - | SW 25 - 35 |
| Monday Afternoon | SW 20 - 30 | SW 25 - 35 | SW 20 - 30 | --- - | SW 20 - 30 |
| Monday Evening | SW 15 - 25 | SW 10 - 20 | WSW 15 - 25 | --- - | WSW 15 - 25 |
| Monday Night | VAR 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | --- - | VAR 0 - 10 |
| Tuesday Morning | E 5 - 15 | E 5 - 15 | E 10 - 20 | --- - | E 10 - 20 |
| Tuesday Afternoon | E 10 - 20 | E 10 - 20 | E 15 - 25 | --- - | E 20 - 30 |
| Tuesday Night | E 15 - 25 | E 15 - 25 | ESE 15 - 25 | --- - | ESE 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | SSW 20 - 30 |
| Monday Afternoon | SW 20 - 30 |
| Monday Evening | SW 15 - 25 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | E 5 - 15 |
| Tuesday Afternoon | E 10 - 20 |
| Tuesday Night | E 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | SSW 15 - 25 |
| Monday Afternoon | SW 25 - 35 |
| Monday Evening | SW 10 - 20 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | E 5 - 15 |
| Tuesday Afternoon | E 10 - 20 |
| Tuesday Night | E 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 20 - 30 |
| Monday Evening | WSW 15 - 25 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | E 10 - 20 |
| Tuesday Afternoon | E 15 - 25 |
| Tuesday Night | ESE 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Evening | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | SW 25 - 35 |
| Monday Afternoon | SW 20 - 30 |
| Monday Evening | WSW 15 - 25 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | E 10 - 20 |
| Tuesday Afternoon | E 20 - 30 |
| Tuesday Night | ESE 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | SSW 20 - 30 |
| Monday Afternoon | SW 20 - 30 |
| Monday Evening | SW 15 - 25 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | E 5 - 15 |
| Tuesday Afternoon | E 10 - 20 |
| Tuesday Night | E 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | SSW 15 - 25 |
| Monday Afternoon | SW 25 - 35 |
| Monday Evening | SW 10 - 20 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | E 5 - 15 |
| Tuesday Afternoon | E 10 - 20 |
| Tuesday Night | E 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 20 - 30 |
| Monday Evening | WSW 15 - 25 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | E 10 - 20 |
| Tuesday Afternoon | E 15 - 25 |
| Tuesday Night | ESE 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Evening | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | SW 25 - 35 |
| Monday Afternoon | SW 20 - 30 |
| Monday Evening | WSW 15 - 25 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | E 10 - 20 |
| Tuesday Afternoon | E 20 - 30 |
| Tuesday Night | ESE 20 - 30 |
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 Morning | SW 20 - 30 | SW 15 - 25 | SW 25 - 35 | --- - | SW 35 - 50 |
| Monday Afternoon | SW 25 - 35 | SW 20 - 30 | SW 30 - 45 | --- - | SW 35 - 50 |
| Monday Evening | WSW 20 - 30 | WSW 20 - 30 | WSW 25 - 35 | --- - | WSW 30 - 45 |
| Monday Night | W 5 - 15 | W 0 - 10 | W 5 - 15 | --- - | W 15 - 25 |
| Tuesday Morning | ESE 10 - 20 | ESE 5 - 15 | SSE 10 - 20 | --- - | SSE 15 - 25 |
| Tuesday Afternoon | ESE 10 - 20 | ESE 10 - 20 | SSE 15 - 25 | --- - | SSE 25 - 35 |
| Tuesday Night | SE 30 - 45 | SE 30 - 45 | SSE 40 - 60 | --- - | SW 50 - 70 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | SW 20 - 30 |
| Monday Afternoon | SW 25 - 35 |
| Monday Evening | WSW 20 - 30 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | ESE 10 - 20 |
| Tuesday Afternoon | ESE 10 - 20 |
| Tuesday Night | SE 30 - 45 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 20 - 30 |
| Monday Evening | WSW 20 - 30 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | ESE 5 - 15 |
| Tuesday Afternoon | ESE 10 - 20 |
| Tuesday Night | SE 30 - 45 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 25 - 35 |
| Monday Afternoon | SW 30 - 45 |
| Monday Evening | WSW 25 - 35 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | SSE 10 - 20 |
| Tuesday Afternoon | SSE 15 - 25 |
| Tuesday Night | SSE 40 - 60 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Evening | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | SW 35 - 50 |
| Monday Afternoon | SW 35 - 50 |
| Monday Evening | WSW 30 - 45 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | SSE 15 - 25 |
| Tuesday Afternoon | SSE 25 - 35 |
| Tuesday Night | SW 50 - 70 |
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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Apr 7, 2017
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.