Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Friday night through Monday
An upper trough brings cooler and drier air into the region behind a very warm and wet frontal system. Some low-level moisture will linger behind the front as the flow turns more to the W or NW. A swath of banded rainfall extends from Portland to the north Puget Sound region on Friday afternoon with a convergence zone having formed, aimed at the Mountain Loop area. All this is expected to gradually sag southward overnight with precipitation gradually cutting off from north to south and the convergence zone shifting toward Stevens Pass before tapering by around midnight. The upper-level trough should usher in cooler temperatures, but they are only expected to drop to around 5000-6000 ft. By contrast to Washington State, Mt. Hood should find rainfall increasing overnight. Higher elevations on the volcanoes may receive several inches of fresh snow overnight. Winds may be in the moderate range at higher elevations on the Cascade east slopes but should be light elsewhere.
On Saturday, expect warmer temperatures east of the Cascade Crest. High clouds may linger in many areas as the frontal band is slow to exit the region, with westerly flow keeping a fair amount of lower cloud cover along the west slopes of the Cascades. Temperatures should be spring-like with light winds.
A ridge moves into the region Saturday night as the trough shifts further east. Expect little change in the pattern on Sunday with more widespread sunshine expected than on Saturday.
Weather Forecast
Hurricane Ridge
| Friday Night | Clouds and very light showers early, with skies clearing after midnight. Mild with cooling temperatures. Light winds. |
| Saturday | Partly cloudy with increased chances of cloud cover during the middle of the day. Light winds. |
Mt. Baker
| Friday Night | Cloudy with very light shower activity in the early evening, then becoming mostly cloudy. Mild with cooling temperatures. Light winds. |
| Saturday | Becoming mostly sunny with the potential for low clouds or fog. Light winds. |
Washington Pass and Leavenworth
| Friday Night | Light rain showers early near the Cascade Crest in the early evening, with skies gradually clearing. Rain south of I-90. Mild with some cooling overnight. Light to occasionally moderate winds. |
| Saturday | High clouds with some clearing in the north and thicker clouds in the south. Warm. Light winds. |
Stevens and Snoqualmie Pass
| Friday Night | Light to occasionally moderate rain showers decreasing in the evening and heaviest in convergence. Becoming mostly cloudy. Mild. Light 5000 ft winds and light west wind through the passes. |
| Saturday | A mix of low and high clouds with some sun breaks possible. Mild. Light 5000 ft winds and increasing but generally light W winds through the passes. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Light rain showers decreasing with several inches of snow possible at higher elevations on the volcanoes. Cooling temperatures. Light winds. |
| Saturday | Mostly cloudy skies. Mild. Light winds. |
Mt. Hood
| Friday Night | Cloudy early with increasing light rain. Mild with cooling temperatures. Light to moderate winds. |
| Saturday | Decreasing light rain in the morning, becoming mostly cloudy in the afternoon. Cooler. Light winds. |
Issued: 2:41 PM PDT Friday, April 19, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Evening | Snow Level | 5500' | 5500' | 6500' | 7000' | 6500' | 6000' | 6500' | 8500' |
| Friday Night | Snow Level | 5000' | 4500' | 5000' | 6500' | 5500' | 5500' | 5500' | 7000' |
| Saturday Morning | Freezing Level | 5500' | 5000' | 5000' | 6500' | 5500' | 5500' | 5500' | 6500' |
| Saturday Afternoon | Freezing Level | 6000' | 6000' | 7000' | 7000' | 6000' | 6000' | 6000' | 6000' |
| Saturday Evening | Freezing Level | 7000' | 7000' | 7500' | 7500' | 7000' | 6500' | 7500' | 6500' |
| Saturday Night | Freezing Level | 7500' | 6500' | 6500' | 7500' | 6500' | 6500' | 6500' | 6500' |
| Sunday Morning | Freezing Level | 7000' | 6000' | 6000' | 7500' | 6000' | 6500' | 6500' | 6500' |
| Sunday Afternoon | Freezing Level | 6500' | 6000' | 7500' | 7500' | 7000' | 6500' | 7000' | 7500' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Snow Level 5500' |
| Friday Night |
Snow Level 5000' |
| Saturday Morning |
Freezing Level 5500' |
| Saturday Afternoon |
Freezing Level 6000' |
| Saturday Evening |
Freezing Level 7000' |
| Saturday Night |
Freezing Level 7500' |
| Sunday Morning |
Freezing Level 7000' |
| Sunday Afternoon |
Freezing Level 6500' |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Snow Level 5500' |
| Friday Night |
Snow Level 4500' |
| Saturday Morning |
Freezing Level 5000' |
| Saturday Afternoon |
Freezing Level 6000' |
| Saturday Evening |
Freezing Level 7000' |
| Saturday Night |
Freezing Level 6500' |
| Sunday Morning |
Freezing Level 6000' |
| Sunday Afternoon |
Freezing Level 6000' |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 6500' |
| Friday Night |
Snow Level 5000' |
| Saturday Morning |
Freezing Level 5000' |
| Saturday Afternoon |
Freezing Level 7000' |
| Saturday Evening |
Freezing Level 7500' |
| Saturday Night |
Freezing Level 6500' |
| Sunday Morning |
Freezing Level 6000' |
| Sunday Afternoon |
Freezing Level 7500' |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Snow Level 7000' |
| Friday Night |
Snow Level 6500' |
| Saturday Morning |
Freezing Level 6500' |
| Saturday Afternoon |
Freezing Level 7000' |
| Saturday Evening |
Freezing Level 7500' |
| Saturday Night |
Freezing Level 7500' |
| Sunday Morning |
Freezing Level 7500' |
| Sunday Afternoon |
Freezing Level 7500' |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 6500' |
| Friday Night |
Snow Level 5500' |
| Saturday Morning |
Freezing Level 5500' |
| Saturday Afternoon |
Freezing Level 6000' |
| Saturday Evening |
Freezing Level 7000' |
| Saturday Night |
Freezing Level 6500' |
| Sunday Morning |
Freezing Level 6000' |
| Sunday Afternoon |
Freezing Level 7000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 6000' |
| Friday Night |
Snow Level 5500' |
| Saturday Morning |
Freezing Level 5500' |
| Saturday Afternoon |
Freezing Level 6000' |
| Saturday Evening |
Freezing Level 6500' |
| Saturday Night |
Freezing Level 6500' |
| Sunday Morning |
Freezing Level 6500' |
| Sunday Afternoon |
Freezing Level 6500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Snow Level 6500' |
| Friday Night |
Snow Level 5500' |
| Saturday Morning |
Freezing Level 5500' |
| Saturday Afternoon |
Freezing Level 6000' |
| Saturday Evening |
Freezing Level 7500' |
| Saturday Night |
Freezing Level 6500' |
| Sunday Morning |
Freezing Level 6500' |
| Sunday Afternoon |
Freezing Level 7000' |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Snow Level 8500' |
| Friday Night |
Snow Level 7000' |
| Saturday Morning |
Freezing Level 6500' |
| Saturday Afternoon |
Freezing Level 6000' |
| Saturday Evening |
Freezing Level 6500' |
| Saturday Night |
Freezing Level 6500' |
| Sunday Morning |
Freezing Level 6500' |
| Sunday Afternoon |
Freezing Level 7500' |
* 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
| Friday Night | Monday | Monday Night | Monday | |
|---|---|---|---|---|
| 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 | LT 0.10 | 0 | 0 | 0 |
| Snoqualmie Pass | LT 0.10 | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | LT 0.10 | 0 | 0 | 0 |
| Paradise | LT 0.10 | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | LT 0.25 | 0 | 0 | 0 |
| Timberline | LT 0.25 | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 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: 2:41 PM PDT Friday, April 19, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | W 5 - 15 | W 5 - 15 | W 5 - 15 | W 5 - 15 | W 10 - 20 |
| Friday Night | N 5 - 15 | N 5 - 15 | WNW 5 - 15 | WNW 5 - 15 | W 10 - 20 |
| Saturday Morning | NW 5 - 15 | NW 5 - 15 | WNW 5 - 15 | WNW 5 - 15 | W 10 - 20 |
| Saturday Afternoon | NNW 0 - 10 | NNW 5 - 15 | WNW 5 - 15 | WNW 5 - 15 | WNW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | N 5 - 15 |
| Saturday Morning | NW 5 - 15 |
| Saturday Afternoon | NNW 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | N 5 - 15 |
| Saturday Morning | NW 5 - 15 |
| Saturday Afternoon | NNW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | WNW 5 - 15 |
| Saturday Morning | WNW 5 - 15 |
| Saturday Afternoon | WNW 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | WNW 5 - 15 |
| Saturday Morning | WNW 5 - 15 |
| Saturday Afternoon | WNW 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | W 10 - 20 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | WNW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | N 5 - 15 |
| Saturday Morning | NW 5 - 15 |
| Saturday Afternoon | NNW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | N 5 - 15 |
| Saturday Morning | NW 5 - 15 |
| Saturday Afternoon | NNW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | WNW 5 - 15 |
| Saturday Morning | WNW 5 - 15 |
| Saturday Afternoon | WNW 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | WNW 5 - 15 |
| Saturday Morning | WNW 5 - 15 |
| Saturday Afternoon | WNW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | W 10 - 20 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | WNW 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 | |
|---|---|---|---|---|---|
| Friday Evening | WSW 10 - 20 | WSW 20 - 30 | W 20 - 30 | WSW 30 - 45 | SW 25 - 35 |
| Friday Night | NNE 10 - 20 | N 5 - 15 | W 10 - 20 | WSW 15 - 25 | WSW 15 - 25 |
| Saturday Morning | NNE 10 - 20 | NNE 10 - 20 | ENE 0 - 10 | VAR 0 - 10 | W 10 - 20 |
| Saturday Afternoon | N 10 - 20 | NNW 10 - 20 | N 0 - 10 | N 0 - 10 | NW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | WSW 10 - 20 |
| Friday Night | NNE 10 - 20 |
| Saturday Morning | NNE 10 - 20 |
| Saturday Afternoon | N 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | WSW 20 - 30 |
| Friday Night | N 5 - 15 |
| Saturday Morning | NNE 10 - 20 |
| Saturday Afternoon | NNW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | W 20 - 30 |
| Friday Night | W 10 - 20 |
| Saturday Morning | ENE 0 - 10 |
| Saturday Afternoon | N 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | WSW 30 - 45 |
| Friday Night | WSW 15 - 25 |
| Saturday Morning | VAR 0 - 10 |
| Saturday Afternoon | N 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | SW 25 - 35 |
| Friday Night | WSW 15 - 25 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | NW 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.
Issued: 2:41 PM PDT Friday, April 19, 2019
Extended Weather Synopsis for Monday night through Monday
Expect a strong gradient in temperatures from N to S throughout the period with mild temperatures in the north and very warm temperatures in the south. Sunday night, the next frontal system approaches the near-shore waters from the WNW. Expect increasing clouds late in the Olympics. By late on Monday, the moisture from this system moves into northwest Washington with some light rain and high elevation snow. The frontal system is expected to weaken as it moves onshore, but moderate to occasionally strong WSW are expected along with moderate rain over Washington State. Lighter rain showers should decrease on Tuesday with gradually decreasing winds.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Freezing Level | 5500' - 6500' | 6500' - 7500' | 7500' - 8500' | |
| Monday | Snow Level | 5000' - 6500' | 7000' - 8000' | 8500' - 9500' | |
| Monday Night | Snow Level | 6500' - 7500' | 8000' - 9000' | 9500' - 10500' | |
| Tuesday | Snow Level | 6000' - 7000' | 7500' - 8500' | 8000' - 9000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Freezing Level 5500' - 6500' |
| Monday |
Snow Level 5000' - 6500' |
| Monday Night |
Snow Level 6500' - 7500' |
| Tuesday |
Snow Level 6000' - 7000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Freezing Level 6500' - 7500' |
| Monday |
Snow Level 7000' - 8000' |
| Monday Night |
Snow Level 8000' - 9000' |
| Tuesday |
Snow Level 7500' - 8500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Freezing Level 7500' - 8500' |
| Monday |
Snow Level 8500' - 9500' |
| Monday Night |
Snow Level 9500' - 10500' |
| Tuesday |
Snow Level 8000' - 9000' |
* 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 18, 2019
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.