Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Saturday night through Sunday
Saturday night and Sunday will be the calm before very wet and mild weather early next week.
A weak high pressure holds over the Pacific Northwest Saturday night and through the day on Sunday. A weak frontal system trailing from a low in the Gulf of Alaska will bring high clouds and a few showers to the west coast of the Olympic Peninsula, but precipitation will generally remain offshore until the stronger frontal system offshore eastward. This stronger front taps into subtropical moisture and is associated with a low just south of the Aleutian Islands. Expect warming, increasing S-SW winds, and the onset of precipitation (first to the Olympic peninsula) late Sunday afternoon. Cool (but not cold) air east of the Cascade crest will be in place as easterly low level flow increases.
Sunday night the frontal firehose of moisture will move into our nearshore waters with significant warming aloft across our region as winds increase out ahead of the system.
On Monday, precipitation will rapidly increase over the Olympics and Northwest Cascades (particularly Mt. Baker where more than 2 inches of rain are likely by the end of the day). Most precipitation will be in the form of rain west of the Cascade Crest as snow levels continue to rise ahead of the front. However, a wintry mix is likely in the Cascade Passes Monday morning with precipitation initially starting as freezing rain or Snow at Snoqualmie and changing to rain later in the morning. The wintry mix will likely hold on a bit longer at Stevens Pass and through much of the day on Monday at Washington Pass, but precipitation amounts are not impressive at the passes due to the orientation of the storm system.
Weather Forecast
Hurricane Ridge
| Saturday Night | High clouds. Light S-SW winds becoming light to moderate. |
| Sunday | High clouds thickening and lowering with light rain developing late in the afternoon. Significant warming with increased S-SW crest-level flow increasing to moderate with strong gusts by evening. |
Mt. Baker
| Saturday Night | High clouds. |
| Sunday | High clouds, thickening late in the day. Warming temperatures. South wind increasing from light to moderate during the day. |
Stevens and Snoqualmie Pass
| Saturday Night | High clouds. Increasing easterly flow through the passes becoming light to moderate. |
| Sunday | High clouds lowering and thickening. Warming aloft with moderate east winds through the passes. |
Mt. Rainier and Crystal
| Saturday Night | High clouds. |
| Sunday | High clouds lowering and thickening. Increasing easterly low-level winds becoming moderate. Rapid warming aloft. Cooler east of the Cascades Crest. |
Washington Pass and Leavenworth
| Saturday Night | Mostly clear and cool with thin high clouds. |
| Sunday | High clouds lowering and thickening by evening. Warming aloft, but cool at the surface with light easterly low-level winds. |
Mt. Hood
| Saturday Night | High clouds. Rapidly rising freezing levels. |
| Sunday | High clouds. Light southerly flow. Rapidly rising freezing levels. |
Issued: 3:22 PM PST Saturday, November 24, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Evening | Freezing Level * | 4500' | 3000' | 2500' | 3500' | 3500' | 3500' | 4000' | 5500' |
| Saturday Night | Freezing Level * | 6500' | 4000' | 2500' | 2000' | 3000' | 3000' | 4000' | 6000' |
| Sunday Morning | Freezing Level * | 8000' | 6500' | 4500' | 3500' | 4500' | 4000' | 7500' | 8500' |
| Sunday Afternoon | Snow Level * | 7000' | 6000' | 3500' | 3500' | 4000' | 5500' | 6500' | 8000' |
| Sunday Evening | Snow Level * | 7500' | 6500' | 3000' | 4000' | 4000' | 6000' | 7000' | 8000' |
| Sunday Night | Snow Level * | 8500' | 7000' | 3000' | 4500' | 5000' | 7000' | 7000' | 8500' |
| Monday Morning | Snow Level * | 9000' | 7500' | 5500' | 6000' | 5500' | 7000' | 7000' | 8000' |
| Monday Afternoon | Snow Level * | 8500' | 8000' | 5500' | 7000' | 5500' | 7000' | 7500' | 8000' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 4500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 6500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 7000' (Easterly Flow *) |
| Sunday Evening |
Snow Level 7500' (Easterly Flow *) |
| Sunday Night |
Snow Level 8500' (Easterly Flow *) |
| Monday Morning |
Snow Level 9000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 8500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 3000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 6500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 6000' (Easterly Flow *) |
| Sunday Evening |
Snow Level 6500' (Easterly Flow *) |
| Sunday Night |
Snow Level 7000' (Easterly Flow *) |
| Monday Morning |
Snow Level 7500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 8000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 2500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 3000' (Easterly Flow *) |
| Sunday Night |
Snow Level 3000' (Easterly Flow *) |
| Monday Morning |
Snow Level 5500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 3500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 2000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 4000' (Easterly Flow *) |
| Sunday Night |
Snow Level 4500' (Easterly Flow *) |
| Monday Morning |
Snow Level 6000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 7000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 3500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Sunday Evening |
Snow Level 4000' (Easterly Flow *) |
| Sunday Night |
Snow Level 5000' (Easterly Flow *) |
| Monday Morning |
Snow Level 5500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 3500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 6000' (Easterly Flow *) |
| Sunday Night |
Snow Level 7000' (Easterly Flow *) |
| Monday Morning |
Snow Level 7000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 7000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 4000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 7500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 6500' (Easterly Flow *) |
| Sunday Evening |
Snow Level 7000' (Easterly Flow *) |
| Sunday Night |
Snow Level 7000' (Easterly Flow *) |
| Monday Morning |
Snow Level 7000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 7500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening |
Freezing Level 5500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 6000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 8500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 8000' (Easterly Flow *) |
| Sunday Evening |
Snow Level 8000' (Easterly Flow *) |
| Sunday Night |
Snow Level 8500' (Easterly Flow *) |
| Monday Morning |
Snow Level 8000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 8000' (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.
Precipitation Forecast
| Saturday Night | Sunday | Sunday Night | Sunday | |
|---|---|---|---|---|
| 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 | 0.75 |
| Mt Baker Ski Area | 0 | 0 | LT 0.10 | 2.00 |
| Washington Pass | 0 | 0 | LT 0.10 | 0.25 |
| Stevens Pass | 0 | 0 | LT 0.10 | 0.25 - 0.50 |
| Snoqualmie Pass | 0 | 0 | LT 0.10 | 0.25 - 0.50 |
| Leavenworth | 0 | 0 | 0 | LT 0.10 |
| Mission Ridge | 0 | 0 | LT 0.10 | LT 0.25 |
| Crystal Mt | 0 | 0 | LT 0.10 | 0.25 - 0.50 |
| Paradise | 0 | 0 | LT 0.25 | 0.50 |
| White Pass | 0 | 0 | LT 0.10 | 0.25 |
| Mt Hood Meadows | 0 | 0 | LT 0.10 | 0.25 |
| Timberline | 0 | 0 | LT 0.10 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.10 |
| Sunday | 0.75 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 2.00 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0.25 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0.25 - 0.50 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0.25 - 0.50 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | 0 |
| Sunday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | LT 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0.25 - 0.50 |
| Paradise | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.25 |
| Sunday | 0.50 |
| White Pass | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Saturday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 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: 3:22 PM PST Saturday, November 24, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Evening | SSW 5 - 15 | SSW 5 - 15 | SW 5 - 15 | SSW 5 - 15 | SSW 5 - 15 |
| Saturday Night | SW 15 - 25 | SSW 10 - 20 | SSE 10 - 20 | S 10 - 20 | S 10 - 20 |
| Sunday Morning | SSW 15 - 25 | S 15 - 25 | SSE 15 - 25 | SSE 10 - 20 | SSE 10 - 20 |
| Sunday Afternoon | S 30 - 45 | S 20 - 30 | SSE 15 - 25 | SSE 5 - 15 | SSW 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Evening | SSW 5 - 15 |
| Saturday Night | SW 15 - 25 |
| Sunday Morning | SSW 15 - 25 |
| Sunday Afternoon | S 30 - 45 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Evening | SSW 5 - 15 |
| Saturday Night | SSW 10 - 20 |
| Sunday Morning | S 15 - 25 |
| Sunday Afternoon | S 20 - 30 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Evening | SW 5 - 15 |
| Saturday Night | SSE 10 - 20 |
| Sunday Morning | SSE 15 - 25 |
| Sunday Afternoon | SSE 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Evening | SSW 5 - 15 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SSE 10 - 20 |
| Sunday Afternoon | SSE 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Saturday Evening | SSW 5 - 15 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SSE 10 - 20 |
| Sunday Afternoon | SSW 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Evening | SSW 5 - 15 |
| Saturday Night | SW 15 - 25 |
| Sunday Morning | SSW 15 - 25 |
| Sunday Afternoon | S 30 - 45 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | SSW 5 - 15 |
| Saturday Night | SSW 10 - 20 |
| Sunday Morning | S 15 - 25 |
| Sunday Afternoon | S 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | SW 5 - 15 |
| Saturday Night | SSE 10 - 20 |
| Sunday Morning | SSE 15 - 25 |
| Sunday Afternoon | SSE 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | SSW 5 - 15 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SSE 10 - 20 |
| Sunday Afternoon | SSE 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | SSW 5 - 15 |
| Saturday Night | S 10 - 20 |
| Sunday Morning | SSE 10 - 20 |
| Sunday Afternoon | SSW 5 - 15 |
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 | |
|---|---|---|---|---|---|
| Saturday Evening | W 15 - 25 | W 10 - 20 | W 10 - 20 | W 10 - 20 | NW 5 - 15 |
| Saturday Night | W 10 - 20 | W 10 - 20 | W 10 - 20 | W 10 - 20 | WNW 10 - 20 |
| Sunday Morning | W 15 - 25 | W 10 - 15 | WNW 10 - 20 | W 10 - 20 | W 10 - 20 |
| Sunday Afternoon | WSW 15 - 25 | WSW 15 - 25 | WSW 10 - 20 | WSW 10 - 20 | W 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Evening | W 15 - 25 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 15 - 25 |
| Sunday Afternoon | WSW 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Evening | W 10 - 20 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 10 - 15 |
| Sunday Afternoon | WSW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Evening | W 10 - 20 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | WNW 10 - 20 |
| Sunday Afternoon | WSW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Evening | W 10 - 20 |
| Saturday Night | W 10 - 20 |
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | WSW 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Evening | NW 5 - 15 |
| Saturday Night | WNW 10 - 20 |
| Sunday Morning | W 10 - 20 |
| Sunday Afternoon | W 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.
Issued: 3:22 PM PST Saturday, November 24, 2018
Extended Weather Synopsis for Sunday night through Sunday
On Monday night and Tuesday morning the frontal system with a broad trough offshore will aim the firehose of subtropical moisture squarely at the Olympics and Northwest Cascades with very significant rain totals in favored locations. Frontal passage is likely in most locations on Tuesday morning.
After the front, precipitation will drastically decrease and become showery while snow levels will gradually slowly lower. Tuesday afternoon through Tuesday night with rain showers transitioning to snow showers at mid and high elevation locations.
Precipitation totals (mostly rain) for Monday night and Tuesday are likely to be around 4" for Mt. Baker, 3" for Paradise, and 2" for Crystal, Stevens, and Snoqualmie Passes with lesser amounts elsewhere.
A developing weaker low will track toward our area Wednesday night, spreading increasing precipitation into our region from the south on Thursday with cooler temperatures associated with it.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday Night | Snow Level | 5500' - 6500' | 5500' - 6500' | 6500' - 7500' | * |
| Tuesday | Snow Level | 4500' - 5500' | 4500' - 5500' | 5500' - 6500' | * |
| Tuesday Night | Snow Level | 3500' - 4500' | 4000' - 5000' | 4000' - 5000' | |
| Wednesday | Snow Level | 3500' - 4500' | 3500' - 4500' | 4500' - 5500' |
| Mt. Baker | Elevation |
|---|---|
| Monday Night |
Snow Level 5500' - 6500' (Easterly Flow *) |
| Tuesday |
Snow Level 4500' - 5500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3500' - 4500' |
| Wednesday |
Snow Level 3500' - 4500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Night |
Snow Level 5500' - 6500' (Easterly Flow *) |
| Tuesday |
Snow Level 4500' - 5500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 4000' - 5000' |
| Wednesday |
Snow Level 3500' - 4500' |
| Mt. Hood | Elevation |
|---|---|
| Monday Night |
Snow Level 6500' - 7500' (Easterly Flow *) |
| Tuesday |
Snow Level 5500' - 6500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 4000' - 5000' |
| Wednesday |
Snow Level 4500' - 5500' |
* 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 23, 2018
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