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
The precipitation was a little behind schedule Friday as the storm system was slow-moving into the mountains. Don't worry, the snow will continue in the mountains overnight. Look for snow in all locations including east of the crest through the early evening. As the low-pressure responsible for all the moisture shifts east overnight, we'll lose some of the mechanics generating the east-side precipitation. As a result, snow showers should taper quickly as you travel east of the Cascade crest. Strong westerly winds will continue to ring precipitation out of the atmosphere as they push moisture up the west slopes of the Cascades. The weather models indicate a Puget Sound convergence zone near or just north of Snoqualmie Pass overnight. This could bring locally heavier snow accumulations to the mountains in that area. In general, the overall pattern will favor the volcanoes from I90 south into central Oregon Friday night and Saturday. Look for moderate southwesterly winds even at lower elevations to continue to impact mountain travel.
We could see a brief break in the action Saturday night as the first weather system exits the region. However, another round of significant precipitation is close on its heels. Look for snow to spread over the area including spilling over the crest to locations further east such as Washington Pass and the Wenatchee Mountains. While this storm isn't quite as potent, it should bring significant snow accumulations to the mountains especially south of Hwy 2.
Weather Forecast
Hurricane Ridge
| Friday Night | Snow. Moderate southwest winds. |
| Saturday | Snow showers. Moderate northwest winds increasing in the afternoon. |
Mt. Baker
| Friday Night | Snow. Moderate to strong south winds. |
| Saturday | Snow showers. Moderate west winds. |
Washington Pass and Leavenworth
| Friday Night | Snow becoming snow showers. Moderate west winds. |
| Saturday | Snow showers possible especially near the crest. Winds increasing in the afternoon. |
Stevens and Snoqualmie Pass
| Friday Night | Snow. Puget Sound convergence zone possible with locally heavier precipitation. Light to moderate east winds at Pass level. |
| Saturday | Snow to snow showers, heaviest near Snoqualmie Pass. Light to moderate west Pass winds. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Snow, heaviest near the volcanoes. Moderate southwest winds. |
| Saturday | Snow and snow showers, heaviest near the volcanoes. Moderate west winds increasing in the afternoon. |
Mt. Hood
| Friday Night | Snow. Moderate to strong west winds. |
| Saturday | Snow. Strong to very strong west winds. |
Issued: 1:59 PM PST Friday, January 10, 2020
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 * | 3000' | 2000' | 500' | 1000' | 2000' | 2000' | 3000' | 3000' |
| Friday Night | Snow Level * | 3000' | 2000' | 1000' | 1000' | 2000' | 2000' | 3000' | 3000' |
| Saturday Morning | Snow Level | 3000' | 1500' | 1000' | 1000' | 2000' | 2000' | 3000' | 3000' |
| Saturday Afternoon | Snow Level | 2500' | 2500' | 2000' | 2000' | 2500' | 2500' | 3000' | 3000' |
| Saturday Evening | Snow Level | 1500' | 1000' | 1000' | 1000' | 1500' | 1500' | 2000' | 2000' |
| Saturday Night | Snow Level | 1500' | 1000' | 500' | 500' | 1500' | 2000' | 2000' | 2500' |
| Sunday Morning | Snow Level | 2000' | 1000' | 500' | 500' | 1500' | 2000' | 2000' | 2500' |
| Sunday Afternoon | Snow Level | 1500' | 500' | 500' | 1000' | 2000' | 2000' | 2500' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Snow Level 3000' (Easterly Flow *) |
| Friday Night |
Snow Level 3000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 2500' |
| Saturday Evening |
Snow Level 1500' |
| Saturday Night |
Snow Level 1500' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 1500' |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Snow Level 2000' (Easterly Flow *) |
| Friday Night |
Snow Level 2000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 1500' |
| Saturday Afternoon |
Snow Level 2500' |
| Saturday Evening |
Snow Level 1000' |
| Saturday Night |
Snow Level 1000' |
| Sunday Morning |
Snow Level 1000' |
| Sunday Afternoon |
Snow Level 500' |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 500' (Easterly Flow *) |
| Friday Night |
Snow Level 1000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 1000' |
| Saturday Afternoon |
Snow Level 2000' |
| Saturday Evening |
Snow Level 1000' |
| Saturday Night |
Snow Level 500' |
| Sunday Morning |
Snow Level 500' |
| Sunday Afternoon |
Snow Level 500' |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Snow Level 1000' (Easterly Flow *) |
| Friday Night |
Snow Level 1000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 1000' |
| Saturday Afternoon |
Snow Level 2000' |
| Saturday Evening |
Snow Level 1000' |
| Saturday Night |
Snow Level 500' |
| Sunday Morning |
Snow Level 500' |
| Sunday Afternoon |
Snow Level 1000' |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 2000' (Easterly Flow *) |
| Friday Night |
Snow Level 2000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon |
Snow Level 2500' |
| Saturday Evening |
Snow Level 1500' |
| Saturday Night |
Snow Level 1500' |
| Sunday Morning |
Snow Level 1500' |
| Sunday Afternoon |
Snow Level 2000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 2000' (Easterly Flow *) |
| Friday Night |
Snow Level 2000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon |
Snow Level 2500' |
| Saturday Evening |
Snow Level 1500' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Snow Level 3000' (Easterly Flow *) |
| Friday Night |
Snow Level 3000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Evening |
Snow Level 2000' |
| Saturday Night |
Snow Level 2000' |
| Sunday Morning |
Snow Level 2000' |
| Sunday Afternoon |
Snow Level 2500' |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Snow Level 3000' (Easterly Flow *) |
| Friday Night |
Snow Level 3000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 3000' |
| Saturday Afternoon |
Snow Level 3000' |
| Saturday Evening |
Snow Level 2000' |
| Saturday Night |
Snow Level 2500' |
| Sunday Morning |
Snow Level 2500' |
| Sunday Afternoon |
Snow 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
| Friday Night | Monday | Monday Night | Monday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0.50 | 0.25 | LT 0.25 | 0.50 |
| Mt Baker Ski Area | 0.50 - 0.75 | 0.25 - 0.50 | LT 0.25 | 0.50 - 0.75 |
| Washington Pass | 0.25 - 0.50 | LT 0.25 | LT 0.10 | 0.25 - 0.50 |
| Leavenworth | LT 0.25 | LT 0.10 | LT 0.10 | 0.25 |
| Stevens Pass | 0.50 | 0.50 | 0.25 - 0.50 | 0.50 - 0.75 |
| Snoqualmie Pass | 1.00 | 1.00 | 0.50 | 0.75 |
| Mission Ridge | LT 0.25 | LT 0.10 | LT 0.10 | 0.25 |
| Crystal Mt | 0.50 - 0.75 | 0.50 - 0.75 | 0.25 - 0.50 | 0.50 - 0.75 |
| Paradise | 1.00 - 1.50 | 1.00 - 1.50 | 1.00 | 1.00 - 1.50 |
| White Pass | 0.75 -1.00 | 0.75 -1.00 | 0.50 | 0.75 -1.00 |
| Mt Hood Meadows | 1.50 | 1.50 | 1.00 - 1.50 | 1.00 - 1.50 |
| Timberline | 1.50 | 1.50 | 1.00 - 1.50 | 1.00 - 1.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0.50 |
| Monday | 0.25 |
| Monday Night | LT 0.25 |
| Monday | 0.50 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | 0.50 - 0.75 |
| Monday | 0.25 - 0.50 |
| Monday Night | LT 0.25 |
| Monday | 0.50 - 0.75 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0.25 - 0.50 |
| Monday | LT 0.25 |
| Monday Night | LT 0.10 |
| Monday | 0.25 - 0.50 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0.25 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0.50 |
| Monday | 0.50 |
| Monday Night | 0.25 - 0.50 |
| Monday | 0.50 - 0.75 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | 1.00 |
| Monday | 1.00 |
| Monday Night | 0.50 |
| Monday | 0.75 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | 0.50 - 0.75 |
| Monday | 0.50 - 0.75 |
| Monday Night | 0.25 - 0.50 |
| Monday | 0.50 - 0.75 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | 1.00 - 1.50 |
| Monday | 1.00 - 1.50 |
| Monday Night | 1.00 |
| Monday | 1.00 - 1.50 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0.75 -1.00 |
| Monday | 0.75 -1.00 |
| Monday Night | 0.50 |
| Monday | 0.75 -1.00 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | 1.50 |
| Monday | 1.50 |
| Monday Night | 1.00 - 1.50 |
| Monday | 1.00 - 1.50 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | 1.50 |
| Monday | 1.50 |
| Monday Night | 1.00 - 1.50 |
| Monday | 1.00 - 1.50 |
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: 1:59 PM PST Friday, January 10, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | SW 10 - 20 | S 15 - 25 | SW 10 - 20 | WSW 10 - 20 | WSW 25 - 35 |
| Friday Night | SW 10 - 20 | S 20 - 30 | S 5 - 15 | SW 10 - 20 | W 30 - 40 |
| Saturday Morning | WNW 10 - 20 | W 10 - 20 | SW 5 - 15 | W 10 - 20 | W 35 - 45 |
| Saturday Afternoon | WNW 15 - 25 | WNW 10 - 20 | W 10 - 20 | W 15 - 25 | W 35 - 45 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | WNW 10 - 20 |
| Saturday Afternoon | WNW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | S 15 - 25 |
| Friday Night | S 20 - 30 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | WNW 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | S 5 - 15 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | W 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | WSW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 15 - 25 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | WSW 25 - 35 |
| Friday Night | W 30 - 40 |
| Saturday Morning | W 35 - 45 |
| Saturday Afternoon | W 35 - 45 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | WNW 10 - 20 |
| Saturday Afternoon | WNW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | S 15 - 25 |
| Friday Night | S 20 - 30 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | WNW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | S 5 - 15 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | WSW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | WSW 25 - 35 |
| Friday Night | W 30 - 40 |
| Saturday Morning | W 35 - 45 |
| Saturday Afternoon | W 35 - 45 |
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 | SSW 30 - 40 | W 25 - 35 | W 35 - 45 | W 40 - 50 | W 45 - 60 |
| Friday Night | SW 25 - 35 | SW 20 - 30 | W 30 - 40 | W 35 - 45 | W 45 - 60 |
| Saturday Morning | WSW 15 - 25 | W 15 - 25 | WNW 25 - 35 | WNW 30 - 40 | WNW 45 - 60 |
| Saturday Afternoon | W 25 - 35 | W 25 - 35 | WNW 30 - 40 | WNW 35 - 45 | WNW 50 - 65 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SSW 30 - 40 |
| Friday Night | SW 25 - 35 |
| Saturday Morning | WSW 15 - 25 |
| Saturday Afternoon | W 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | W 25 - 35 |
| Friday Night | SW 20 - 30 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | W 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | W 35 - 45 |
| Friday Night | W 30 - 40 |
| Saturday Morning | WNW 25 - 35 |
| Saturday Afternoon | WNW 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | W 40 - 50 |
| Friday Night | W 35 - 45 |
| Saturday Morning | WNW 30 - 40 |
| Saturday Afternoon | WNW 35 - 45 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | W 45 - 60 |
| Friday Night | W 45 - 60 |
| Saturday Morning | WNW 45 - 60 |
| Saturday Afternoon | WNW 50 - 65 |
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: 1:59 PM PST Friday, January 10, 2020
Extended Weather Synopsis for Monday night through Monday
Looking at the extended forecast, the word "cold" comes to mind. Very cold air is expected to seep into the region from the north bringing freezing levels to near sea level for most locations. The question during the extended forecast is will there be any moisture to create snow? Well, that's hard to say. Lingering moisture on Sunday night and Monday seem to squeeze out a few more snow showers for some locations. As temperatures continue to cool, the air seems dry, giving us a break from the storms The active weather pattern appears to continue in the middle of next week.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Snow Level | 0' - 1000' | 0' - 1500' | 500' - 2000' | |
| Monday | Snow Level | 0' - 500' | 0' - 500' | 500' - 1500' | |
| Monday Night | Freezing Level | 0' - 500' | 0' - 1000' | 500' - 1500' | * |
| Tuesday | Freezing Level | 0' - 500' | 0' - 500' | 0' - 1000' | * |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Snow Level 0' - 1000' |
| Monday |
Snow Level 0' - 500' |
| Monday Night |
Freezing Level 0' - 500' (Easterly Flow *) |
| Tuesday |
Freezing Level 0' - 500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Snow Level 0' - 1500' |
| Monday |
Snow Level 0' - 500' |
| Monday Night |
Freezing Level 0' - 1000' (Easterly Flow *) |
| Tuesday |
Freezing Level 0' - 500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Snow Level 500' - 2000' |
| Monday |
Snow Level 500' - 1500' |
| Monday Night |
Freezing Level 500' - 1500' (Easterly Flow *) |
| Tuesday |
Freezing Level 0' - 1000' (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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Previous forecast from Jan 10, 2020
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.