Mountain Weather Forecast
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Sunday night through Tuesday
The Pacific Northwest is in store for a sharp shift from the above normal temperatures of the last 5 days. A broad trough gradually approaches from British Columbia Sunday evening through Tuesday. In the process, upper-level W winds develop, with low-level support from a significant W to E pressure gradient across the Cascades. Winds increased into the low 20 mph range at Snoqualmie Pass on Sunday afternoon as a result of the pressure gradient from Seattle to Wenatchee reaching 8 MB. This pressure gradient should remain elevated in the 8-10 mb range through Monday evening. The result will be rapidly cooling temperatures Sunday night and early Monday, along with moderate winds through the mountain gaps and along the east slopes of the Cascades.
The approaching trough will also provide enough lift/moisture to bring in plenty of low clouds. Most of the precipitation get wrung out by weak convergence bands forming off Vancouver Island and the Olympics. The former should impact the Mt Baker and the Skagit Valley. The latter should impact the mountain loop south to Snoqualmie. Activity generally starts very light early Monday morning and increases through the day with 3000-4000 ft snow levels. Precipitation peaks with some locally light to moderate precipitation rates Monday evening, before gradually easing into Tuesday morning. Expect a 10-25% chance of weak Thurnderstorms or thunder snow showers with the cold air aloft on Tuesday from the central Cascades northward, particularly during the afternoon hours, but any cells should be isolated with snow levels around 2500 ft.
7am Mountain Weather Forecasts will continue through Sunday, April 14th. Beginning Monday, April 15th, we will issue 230pm Mountain Weather Forecasts every day through Sunday, April 28th.
Weather Forecast
Olympics
| Sunday Night | High clouds with increasing lower clouds along the west slopes. |
| Monday | Much cooler. Mostly cloudy with a chance of very light rain or snow mainly western slopes. |
West North
| Sunday Night | High clouds with increasing low cloud banking up along the western slopes after midnight. |
| Monday | Much cooler. Increasing light rain and snow showers. |
West Central
| Sunday Night | High clouds with increasing low cloud banking up along the western slopes after midnight with a slight chance of light rain or snow in the early morning hours. |
| Monday | Much cooler. Increasing light rain/snow showers and weak convergence. |
West South
| Sunday Night | High clouds with increasing low cloud banking up along the western slopes after midnight. Moderate to occasionally strong ridgeline winds through mountain gaps. Moderate or strong ridgeline winds at times near the Cascade Crest. |
| Monday | Much cooler. Mostly cloudy with very light rain or snow showers possible in the western foothills. Moderate to occasionally strong ridgeline winds through the mountain gaps. Moderate or strong ridgeline winds at times near the Cascade Crest. |
Stevens Pass
| Sunday Night | High clouds with increasing low cloud in the early morning hours. Light to moderate ridgeline winds and W winds at the Pass. Much cooler. Increasing light rain/snow showers and weak convergence. Light to moderate ridgeline winds and W winds at the Pass. |
| Monday | Much cooler. Increasing light rain/snow showers and weak convergence. Light to moderate ridgeline winds and W winds at the Pass. |
Snoqualmie Pass
| Sunday Night | High clouds with increasing low cloud in the early morning hours. Moderate ridgeline winds and W winds at the Pass. |
| Monday | Much cooler. Increasing light rain/snow showers and weak convergence. Moderate to occasionally strong ridgeline winds and moderate W winds at the Pass. |
East North
| Sunday Night | High clouds with a few low clouds by morning. Increasing light to moderate ridgeline winds. |
| Monday | Much cooler. Partly cloudy. Moderate ridgeline winds. |
East Central
| Sunday Night | High clouds with a few low clouds by morning. Moderate ridgeline winds. |
| Monday | Much cooler. Partly cloudy with a few rain/snow showers closer to the Cascade Crest. Moderate ridgeline winds and strong gusts. |
East South
| Sunday Night | High clouds with a few low clouds by morning. Light to moderate ridgeline winds. |
| Monday | Much cooler. Partly cloudy. Moderate ridgeline winds. |
Mt. Hood
| Sunday Night | High clouds with low clouds banking up against the western side of the mountain. Moderate ridgeline winds. |
| Monday | Much cooler. Mostly cloudy western part with a few very light rain or snow showers. Partly cloudy east of the mountain. Moderate ridgeline winds with strong gusts. |
Issued: 2:43 PM PST Sunday, April 14, 2024
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Evening | Snow Level | None' | None' | None' | None' | 9000' | 8500' | None' | 9500' |
| Sunday Night | Snow Level | None' | None' | None' | None' | 7000' | 6500' | None' | 7500' |
| Monday Morning | Snow Level | None' | None' | None' | None' | 3500' | 3000' | None' | 4500' |
| Monday Afternoon | Snow Level | None' | None' | None' | None' | 3500' | 3500' | None' | 3500' |
| Monday Evening | Snow Level | None' | None' | None' | None' | 3500' | 3000' | None' | 3500' |
| Monday Night | Snow Level | None' | None' | None' | None' | 2000' | 2000' | None' | 3000' |
| Tuesday Morning | Snow Level | None' | None' | None' | None' | 20000' | 2000' | None' | 3000' |
| Tuesday Afternoon | Snow Level | None' | None' | None' | None' | 2500' | 2500' | None' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening |
Snow Level None' |
| Sunday Night |
Snow Level None' |
| Monday Morning |
Snow Level None' |
| Monday Afternoon |
Snow Level None' |
| Monday Evening |
Snow Level None' |
| Monday Night |
Snow Level None' |
| Tuesday Morning |
Snow Level None' |
| Tuesday Afternoon |
Snow Level None' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening |
Snow Level None' |
| Sunday Night |
Snow Level None' |
| Monday Morning |
Snow Level None' |
| Monday Afternoon |
Snow Level None' |
| Monday Evening |
Snow Level None' |
| Monday Night |
Snow Level None' |
| Tuesday Morning |
Snow Level None' |
| Tuesday Afternoon |
Snow Level None' |
| Washington Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level None' |
| Sunday Night |
Snow Level None' |
| Monday Morning |
Snow Level None' |
| Monday Afternoon |
Snow Level None' |
| Monday Evening |
Snow Level None' |
| Monday Night |
Snow Level None' |
| Tuesday Morning |
Snow Level None' |
| Tuesday Afternoon |
Snow Level None' |
| Leavenworth | Elevation |
|---|---|
| Sunday Evening |
Snow Level None' |
| Sunday Night |
Snow Level None' |
| Monday Morning |
Snow Level None' |
| Monday Afternoon |
Snow Level None' |
| Monday Evening |
Snow Level None' |
| Monday Night |
Snow Level None' |
| Tuesday Morning |
Snow Level None' |
| Tuesday Afternoon |
Snow Level None' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 9000' |
| Sunday Night |
Snow Level 7000' |
| Monday Morning |
Snow Level 3500' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Evening |
Snow Level 3500' |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Snow Level 20000' |
| Tuesday Afternoon |
Snow Level 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 8500' |
| Sunday Night |
Snow Level 6500' |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Evening |
Snow Level 3000' |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Evening |
Snow Level None' |
| Sunday Night |
Snow Level None' |
| Monday Morning |
Snow Level None' |
| Monday Afternoon |
Snow Level None' |
| Monday Evening |
Snow Level None' |
| Monday Night |
Snow Level None' |
| Tuesday Morning |
Snow Level None' |
| Tuesday Afternoon |
Snow Level None' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening |
Snow Level 9500' |
| Sunday Night |
Snow Level 7500' |
| Monday Morning |
Snow Level 4500' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Evening |
Snow Level 3500' |
| Monday Night |
Snow Level 3000' |
| Tuesday Morning |
Snow Level 3000' |
| Tuesday 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
| Sunday Night | Monday | Monday Night | Tuesday | |
|---|---|---|---|---|
| 5 pm - 5 am | 5 am - 5 pm | 5 pm - 5 am | 5 am - 5 pm | |
| Hurricane Ridge | 0 | LT 0.10 | LT 0.10 | 0 |
| Mt Baker Ski Area | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Mt. Loop - Barlow Pass | LT 0.10 | LT 0.25 | LT 0.25 | LT 0.10 |
| Stevens Pass | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | 0 | LT 0.25 | 0.25 | LT 0.10 |
| Crystal Mt | 0 | LT 0.10 | 0 | LT 0.10 |
| Paradise | 0 | LT 0.10 | LT 0.10 | LT 0.10 |
| White Pass | 0 | 0 | 0 | 0 |
| Washington Pass | 0 | 0 | 0 | LT 0.10 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Salmon la Sac - Gallagher Head | 0 | LT 0.10 | LT 0.10 | LT 0.10 |
| Tieton River - Darland Mt. | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | 0 | 0 | 0 |
| Timberline | 0 | LT 0.10 | LT 0.10 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Mt. Loop - Barlow Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Monday | LT 0.25 |
| Monday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.25 |
| Monday Night | 0.25 |
| Tuesday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | 0 |
| Tuesday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | 0 |
| Salmon la Sac - Gallagher Head | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Tieton River - Darland Mt. | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | 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: 2:43 PM PST Sunday, April 14, 2024
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | --- None - None | --- None - None | --- None - None | --- None - None | W None - None |
| Sunday Night | --- None - None | --- None - None | --- None - None | --- None - None | W None - None |
| Monday Morning | --- None - None | --- None - None | --- None - None | --- None - None | W None - None |
| Monday Afternoon | --- None - None | --- None - None | --- None - None | --- None - None | W None - None |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | W None - None |
| Sunday Night | W None - None |
| Monday Morning | W None - None |
| Monday Afternoon | W None - None |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | W None - None |
| Sunday Night | W None - None |
| Monday Morning | W None - None |
| Monday Afternoon | W None - None |
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 | |
|---|---|---|---|---|---|
| Sunday Evening | --- None - None | --- None - None | --- None - None | --- None - None | --- None - None |
| Sunday Night | --- None - None | --- None - None | --- None - None | --- None - None | --- None - None |
| Monday Morning | --- None - None | --- None - None | --- None - None | --- None - None | --- None - None |
| Monday Afternoon | --- None - None | --- None - None | --- None - None | --- None - None | --- None - None |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | --- None - None |
| Sunday Night | --- None - None |
| Monday Morning | --- None - None |
| Monday Afternoon | --- None - None |
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: 2:43 PM PST Sunday, April 14, 2024
Extended Weather Synopsis for Tuesday night through Thursday
The Pacific Northwest remains at the western edge of the broad trough Tuesday night through Thursday. Expect slight chances for afternoon showers to flare up. Temperatures will gradually warm as an offshore ridge builds just offshore.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Night | Snow Level | None' - None' | None' - None' | None' - None' | |
| Wednesday | Snow Level | None' - None' | None' - None' | None' - None' | |
| Wednesday Night | Snow Level | None' - None' | None' - None' | None' - None' | |
| Thursday | Snow Level | None' - None' | None' - None' | None' - None' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Night |
Snow Level None' - None' |
| Wednesday |
Snow Level None' - None' |
| Wednesday Night |
Snow Level None' - None' |
| Thursday |
Snow Level None' - None' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night |
Snow Level None' - None' |
| Wednesday |
Snow Level None' - None' |
| Wednesday Night |
Snow Level None' - None' |
| Thursday |
Snow Level None' - None' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night |
Snow Level None' - None' |
| Wednesday |
Snow Level None' - None' |
| Wednesday Night |
Snow Level None' - None' |
| Thursday |
Snow Level None' - None' |
* 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 April 14, 2024
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.