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 Friday
We are in for a significant change in the weather pattern over the weekend. Upper level ridging oriented along the West Coast will begin to move inland during the day tomorrow, opening the door for a fast moving frontal system in NW flow aloft.
After a day with increasing clouds over the northern half of the forecast area and increasing alpine winds Saturday, the front will pass through the Washington Cascades early Sunday morning. The heaviest precipitation will be associated with the frontal passage, especially along the west slopes of the Cascades. Snow levels will stay elevated in the 5500-6000 range until after the front's passage. Look for strong post-frontal west winds along the east slopes of the Cascades Sunday morning.
Scattered showers will follow on Sunday as snow levels fall into the 3500-4000 ft range. There is some uncertainty to whether or not a Puget Sound Convergence will develop, bringing locally heavier showers to the central Cascades.
Weather Forecast
Hurricane Ridge
| Friday Night | Increasing high clouds late tonight. Mild. |
| Saturday | Cloudy with occasional light rain and snow. Winds increasing in the afternoon. |
Mt. Baker
| Friday Night | Increasing high clouds late tonight. Mild. |
| Saturday | Cloudy with light rain and snow developing mid-day. Winds increasing in the afternoon |
Washington Pass and Leavenworth
| Friday Night | Increasing high clouds late tonight. |
| Saturday | Cloudy with occasional light rain and snow developing near the Cascade crest. Alpine winds increasing in the afternoon. |
Stevens and Snoqualmie Pass
| Friday Night | Mostly clear with increasing high clouds overnight. Mild. Light west winds in the Passes. |
| Saturday | Mostly cloudy with high clouds in the morning, becoming cloudy in the afternoon. Light west winds in the Passes becoming moderate in the afternoon. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Mostly clear with increasing high clouds overnight. Mild. |
| Saturday | Partly sunny with filtered sunshine and high clouds. |
Mt. Hood
| Friday Night | Mostly clear. Mild. |
| Saturday | Partly to mostly sunny with periods of high clouds. Mild. |
Issued: 2:51 PM PST Friday, November 22, 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 | Freezing Level | 8000' | 6500' | 7500' | 7500' | 7500' | 8500' | 10000' | 10000' |
| Friday Night | Freezing Level | 7500' | 6500' | 5500' | 6000' | 6000' | 7000' | 9000' | 10000' |
| Saturday Morning | Freezing Level | 7500' | 6500' | 5500' | 6000' | 6000' | 7000' | 9000' | 10000' |
| Saturday Afternoon | Snow Level | 6000' | 5500' | 5500' | 6000' | 6000' | 6000' | 6500' | 10000' |
| Saturday Evening | Snow Level | 6500' | 6000' | 5500' | 6000' | 5500' | 6000' | 6000' | 7000' |
| Saturday Night | Snow Level | 5500' | 5500' | 5500' | 5000' | 5500' | 6000' | 6000' | 7000' |
| Sunday Morning | Snow Level | 3500' | 3500' | 3500' | 4000' | 3500' | 4000' | 4500' | 6500' |
| Sunday Afternoon | Snow Level | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 4000' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Freezing Level 8000' |
| Friday Night |
Freezing Level 7500' |
| Saturday Morning |
Freezing Level 7500' |
| Saturday Afternoon |
Snow Level 6000' |
| Saturday Evening |
Snow Level 6500' |
| Saturday Night |
Snow Level 5500' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Freezing Level 6500' |
| Friday Night |
Freezing Level 6500' |
| Saturday Morning |
Freezing Level 6500' |
| Saturday Afternoon |
Snow Level 5500' |
| Saturday Evening |
Snow Level 6000' |
| Saturday Night |
Snow Level 5500' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 3500' |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Freezing Level 7500' |
| Friday Night |
Freezing Level 5500' |
| Saturday Morning |
Freezing Level 5500' |
| Saturday Afternoon |
Snow Level 5500' |
| Saturday Evening |
Snow Level 5500' |
| Saturday Night |
Snow Level 5500' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 3500' |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Freezing Level 7500' |
| Friday Night |
Freezing Level 6000' |
| Saturday Morning |
Freezing Level 6000' |
| Saturday Afternoon |
Snow Level 6000' |
| Saturday Evening |
Snow Level 6000' |
| Saturday Night |
Snow Level 5000' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Snow Level 3500' |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Freezing Level 7500' |
| Friday Night |
Freezing Level 6000' |
| Saturday Morning |
Freezing Level 6000' |
| Saturday Afternoon |
Snow Level 6000' |
| Saturday Evening |
Snow Level 5500' |
| Saturday Night |
Snow Level 5500' |
| Sunday Morning |
Snow Level 3500' |
| Sunday Afternoon |
Snow Level 3500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Freezing Level 8500' |
| Friday Night |
Freezing Level 7000' |
| Saturday Morning |
Freezing Level 7000' |
| Saturday Afternoon |
Snow Level 6000' |
| Saturday Evening |
Snow Level 6000' |
| Saturday Night |
Snow Level 6000' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Snow Level 3500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Freezing Level 10000' |
| Friday Night |
Freezing Level 9000' |
| Saturday Morning |
Freezing Level 9000' |
| Saturday Afternoon |
Snow Level 6500' |
| Saturday Evening |
Snow Level 6000' |
| Saturday Night |
Snow Level 6000' |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Snow Level 3500' |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Freezing Level 10000' |
| Friday Night |
Freezing Level 10000' |
| Saturday Morning |
Freezing Level 10000' |
| Saturday Afternoon |
Snow Level 10000' |
| Saturday Evening |
Snow Level 7000' |
| Saturday Night |
Snow Level 7000' |
| Sunday Morning |
Snow Level 6500' |
| Sunday Afternoon |
Snow Level 4000' |
* 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 | Friday | Friday Night | Friday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | LT 0.10 | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | 0 | LT 0.25 | 0.50 | LT 0.10 |
| Washington Pass | 0 | LT 0.10 | 0.25 - 0.50 | LT 0.10 |
| Leavenworth | 0 | 0 | LT 0.25 | LT 0.10 |
| Stevens Pass | 0 | 0 | 0.50 - 0.75 | LT 0.25 |
| Snoqualmie Pass | 0 | 0 | 0.75 | 0.25 |
| Mission Ridge | 0 | 0 | LT 0.10 | LT 0.10 |
| Crystal Mt | 0 | 0 | 0.25 - 0.50 | LT 0.25 |
| Paradise | 0 | 0 | 0.50 - 0.75 | 0.25 |
| White Pass | 0 | 0 | 0.25 - 0.50 | LT 0.25 |
| Mt Hood Meadows | 0 | 0 | LT 0.25 | LT 0.25 |
| Timberline | 0 | 0 | LT 0.25 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | LT 0.10 |
| Friday Night | LT 0.10 |
| Friday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | LT 0.25 |
| Friday Night | 0.50 |
| Friday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | LT 0.10 |
| Friday Night | 0.25 - 0.50 |
| Friday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | LT 0.25 |
| Friday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | 0.50 - 0.75 |
| Friday | LT 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | 0.75 |
| Friday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | LT 0.10 |
| Friday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | 0.25 - 0.50 |
| Friday | LT 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | 0.50 - 0.75 |
| Friday | 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | 0.25 - 0.50 |
| Friday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | LT 0.25 |
| Friday | LT 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Friday | 0 |
| Friday Night | LT 0.25 |
| Friday | 0.25 |
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: 2:51 PM PST Friday, November 22, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | W 5 - 15 | NW 10 - 20 | NW 10 - 20 | NW 0 - 10 | NW 5 - 15 |
| Friday Night | W 10 - 20 | W 10 - 20 | NW 10 - 20 | NW 0 - 10 | NW 5 - 15 |
| Saturday Morning | WSW 15 - 25 | WSW 15 - 25 | W 10 - 20 | WNW 0 - 10 | NW 5 - 15 |
| Saturday Afternoon | WSW 20 - 30 | WSW 20 - 30 | W 15 - 25 | W 10 - 20 | NW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | W 10 - 20 |
| Saturday Morning | WSW 15 - 25 |
| Saturday Afternoon | WSW 20 - 30 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | NW 10 - 20 |
| Friday Night | W 10 - 20 |
| Saturday Morning | WSW 15 - 25 |
| Saturday Afternoon | WSW 20 - 30 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | NW 10 - 20 |
| Friday Night | NW 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | NW 0 - 10 |
| Friday Night | NW 0 - 10 |
| Saturday Morning | WNW 0 - 10 |
| Saturday Afternoon | W 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | NW 5 - 15 |
| Friday Night | NW 5 - 15 |
| Saturday Morning | NW 5 - 15 |
| Saturday Afternoon | NW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | W 10 - 20 |
| Saturday Morning | WSW 15 - 25 |
| Saturday Afternoon | WSW 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | NW 10 - 20 |
| Friday Night | W 10 - 20 |
| Saturday Morning | WSW 15 - 25 |
| Saturday Afternoon | WSW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | NW 10 - 20 |
| Friday Night | NW 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | NW 0 - 10 |
| Friday Night | NW 0 - 10 |
| Saturday Morning | WNW 0 - 10 |
| Saturday Afternoon | W 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | NW 5 - 15 |
| Friday Night | NW 5 - 15 |
| Saturday Morning | NW 5 - 15 |
| Saturday Afternoon | NW 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 | NW 20 - 30 | WNW 20 - 30 | NW 20 - 30 | NW 15 - 25 | W 5 - 15 |
| Friday Night | WNW 25 - 35 | W 30 - 40 | NW 30 - 40 | NW 15 - 25 | W 10 - 20 |
| Saturday Morning | W 35 - 45 | W 35 - 45 | W 40 - 50 | W 25 - 35 | NW 5 - 15 |
| Saturday Afternoon | W 35 - 45 | WSW 40 - 50 | W 45 - 55 | W 35 - 45 | W 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | NW 20 - 30 |
| Friday Night | WNW 25 - 35 |
| Saturday Morning | W 35 - 45 |
| Saturday Afternoon | W 35 - 45 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | WNW 20 - 30 |
| Friday Night | W 30 - 40 |
| Saturday Morning | W 35 - 45 |
| Saturday Afternoon | WSW 40 - 50 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | NW 20 - 30 |
| Friday Night | NW 30 - 40 |
| Saturday Morning | W 40 - 50 |
| Saturday Afternoon | W 45 - 55 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | NW 15 - 25 |
| Friday Night | NW 15 - 25 |
| Saturday Morning | W 25 - 35 |
| Saturday Afternoon | W 35 - 45 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | W 10 - 20 |
| Saturday Morning | NW 5 - 15 |
| Saturday Afternoon | W 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.
Issued: 2:51 PM PST Friday, November 22, 2019
Extended Weather Synopsis for Friday night through Friday
NW flow will alow several weather disturbances to glance the area Sunday night through Tuesday. The most organized of the bunch looks to be a weak low pressure system off the central Washington coast on Monday, bringing a quick but significant shot of precipitation to the south Washington Cascades. Snow levels will lower substantially into early next week, so any precipitation we do receive will be snowfall. Tuesday should be the start of a drying pattern that lasts at least until Friday of next week as a cold and broad upper level trough settles over the SW US.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Snow Level | 2000' - 3000' | 2000' - 3000' | 3000' - 4000' | |
| Monday | Snow Level | 1500' - 2500' | 1500' - 2500' | 2500' - 3500' | |
| Monday Night | Snow Level | 500' - 1500' | 1000' - 2000' | 1000' - 2000' | |
| Tuesday | Snow Level | 500' - 1500' | 1000' - 2000' | 1000' - 2000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Snow Level 2000' - 3000' |
| Monday |
Snow Level 1500' - 2500' |
| Monday Night |
Snow Level 500' - 1500' |
| Tuesday |
Snow Level 500' - 1500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Snow Level 2000' - 3000' |
| Monday |
Snow Level 1500' - 2500' |
| Monday Night |
Snow Level 1000' - 2000' |
| Tuesday |
Snow Level 1000' - 2000' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Snow Level 3000' - 4000' |
| Monday |
Snow Level 2500' - 3500' |
| Monday Night |
Snow Level 1000' - 2000' |
| Tuesday |
Snow Level 1000' - 2000' |
* 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 Nov 21, 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.