Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Monday & Monday
A common spring-like weather pattern exists over the eastern north Pacific with several slow-moving low pressure circulations cut-off from the jetstream. A small-scale and weakening upper low is drifting S-SW off the coast of Oregon on Monday morning, moving the instability and shower activity south of our region as a weak upper ridge builds over the forecast area.
Monday will bring fair weather with an isolated rain or snow shower possible and partly to mostly sunny skies with light winds.
The weak ridge will linger Monday night through Tuesday bringing continued fair weather with mostly clear skies. High clouds will begin increasing Tuesday afternoon as a frontal feature begins slowly approaching from the northwest through Tuesday night.
Freezing levels are typical for mid-March and show a strong diurnal signal.
Weather Forecast
Olympics
| Monday | Mostly sunny in the morning with clouds building in the afternoon with a very isolated shower possible. |
| Monday Night | Becoming mostly clear. |
| Tuesday | Mostly sunny with increasing high clouds in the afternoon. |
| Tuesday Night | High clouds. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Monday | Mostly sunny in the south, partly cloudy in the north. Scattered cumulus clouds throughout in the afternoon with a very isolated shower possible. |
| Monday Night | Becoming mostly clear. |
| Tuesday | Mostly sunny with some high clouds arriving in the north in the afternoon. |
| Tuesday Night | Fair with some high clouds. |
East Slopes of the Washington Cascades
| Monday | Mostly sunny in the south, partly cloudy in the north. Scattered cumulus clouds throughout in the afternoon with a very isolated shower possible. |
| Monday Night | Becoming mostly clear. |
| Tuesday | Mostly sunny with some high clouds arriving in the north in the afternoon. |
| Tuesday Night | Fair with some high clouds. |
Mt. Hood
| Monday | Mostly sunny with scattered cumulus clouds developing in the afternoon with a very isolated shower possible. |
| Monday Night | Becoming mostly clear. |
| Tuesday | Mostly sunny in the morning becoming partly cloudy in the afternoon. |
| Tuesday Night | Mostly clear in the evening, then high clouds increasing. |
Issued: 7:10 AM PDT Monday, March 19, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Morning | Freezing Level | 3000' | 3500' | 4000' | ' | ' | 3500' | ' | 3500' |
| Monday Afternoon | Freezing Level | 4000' | 4000' | 5000' | ' | ' | 4500' | ' | 5000' |
| Monday Night | Freezing Level | 2500' | 2500' | 2000' | ' | ' | 2000' | ' | 2500' |
| Tuesday Morning | Freezing Level | 4000' | 4000' | 5000' | ' | ' | 4500' | ' | 5000' |
| Tuesday Afternoon | Freezing Level | 4000' | 4500' | 5500' | ' | ' | 5000' | ' | 6000' |
| Tuesday Night | Freezing Level | 3000' | 2500' | 3000' | ' | ' | 2500' | ' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning |
Freezing Level 3000' |
| Monday Afternoon |
Freezing Level 4000' |
| Monday Night |
Freezing Level 2500' |
| Tuesday Morning |
Freezing Level 4000' |
| Tuesday Afternoon |
Freezing Level 4000' |
| Tuesday Night |
Freezing Level 3000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning |
Freezing Level 3500' |
| Monday Afternoon |
Freezing Level 4000' |
| Monday Night |
Freezing Level 2500' |
| Tuesday Morning |
Freezing Level 4000' |
| Tuesday Afternoon |
Freezing Level 4500' |
| Tuesday Night |
Freezing Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level 4000' |
| Monday Afternoon |
Freezing Level 5000' |
| Monday Night |
Freezing Level 2000' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Freezing Level 5500' |
| Tuesday Night |
Freezing Level 3000' |
| Leavenworth | Elevation |
|---|---|
| Monday Morning |
Freezing Level ' |
| Monday Afternoon |
Freezing Level ' |
| Monday Night |
Freezing Level ' |
| Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Freezing Level ' |
| Stevens Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level ' |
| Monday Afternoon |
Freezing Level ' |
| Monday Night |
Freezing Level ' |
| Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Freezing Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level 3500' |
| Monday Afternoon |
Freezing Level 4500' |
| Monday Night |
Freezing Level 2000' |
| Tuesday Morning |
Freezing Level 4500' |
| Tuesday Afternoon |
Freezing Level 5000' |
| Tuesday Night |
Freezing Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Morning |
Freezing Level ' |
| Monday Afternoon |
Freezing Level ' |
| Monday Night |
Freezing Level ' |
| Tuesday Morning |
Freezing Level ' |
| Tuesday Afternoon |
Freezing Level ' |
| Tuesday Night |
Freezing Level ' |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning |
Freezing Level 3500' |
| Monday Afternoon |
Freezing Level 5000' |
| Monday Night |
Freezing Level 2500' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Freezing Level 6000' |
| Tuesday Night |
Freezing Level 3000' |
* 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
| Monday | Monday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | LT 0.10 |
| Snoqualmie Pass | LT 0.10 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | LT 0.10 |
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: 7:10 AM PDT Monday, March 19, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | VAR 0 - 10 | W 0 - 10 | W 0 - 10 | --- - | W 5 - 15 |
| Monday Afternoon | W 5 - 15 | WSW 5 - 15 | W 5 - 15 | --- - | WNW 5 - 15 |
| Monday Night | WSW 5 - 15 | WSW 5 - 15 | W 5 - 15 | --- - | W 0 - 10 |
| Tuesday Morning | SW 5 - 15 | SSW 5 - 15 | WSW 5 - 15 | --- - | WSW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 | WSW 5 - 15 | W 5 - 15 | --- - | W 5 - 15 |
| Tuesday Night | SSW 5 - 15 | S 5 - 15 | SSW 5 - 15 | --- - | SW 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Monday Night | WSW 5 - 15 |
| Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 |
| Tuesday Night | SSW 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | WSW 5 - 15 |
| Tuesday Morning | SSW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 |
| Tuesday Night | S 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | WSW 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | SSW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | WNW 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | WSW 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | SW 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Monday Night | WSW 5 - 15 |
| Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 |
| Tuesday Night | SSW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | WSW 5 - 15 |
| Tuesday Morning | SSW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 |
| Tuesday Night | S 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | WSW 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | SSW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | WNW 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | WSW 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Tuesday Night | SW 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 | |
|---|---|---|---|---|---|
| Monday Morning | WNW 5 - 15 | N 5 - 15 | NW 5 - 15 | --- - | W 5 - 15 |
| Monday Afternoon | W 5 - 15 | W 5 - 15 | W 5 - 15 | --- - | W 5 - 15 |
| Monday Night | W 10 - 20 | WSW 10 - 20 | W 10 - 20 | --- - | WSW 10 - 20 |
| Tuesday Morning | W 10 - 20 | WSW 10 - 20 | W 10 - 20 | --- - | WSW 5 - 15 |
| Tuesday Afternoon | WSW 10 - 20 | WSW 10 - 20 | WSW 10 - 20 | --- - | WSW 5 - 15 |
| Tuesday Night | SW 10 - 20 | SW 10 - 20 | SW 10 - 20 | --- - | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | WNW 5 - 15 |
| Monday Afternoon | W 5 - 15 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | WSW 10 - 20 |
| Tuesday Night | SW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | N 5 - 15 |
| Monday Afternoon | W 5 - 15 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon | WSW 10 - 20 |
| Tuesday Night | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | NW 5 - 15 |
| Monday Afternoon | W 5 - 15 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | WSW 10 - 20 |
| Tuesday Night | SW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | W 5 - 15 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | WSW 5 - 15 |
| Tuesday Afternoon | WSW 5 - 15 |
| Tuesday Night | SW 15 - 25 |
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 Mar 16, 2018
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.