Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Monday night through Sunday
We'll see a change in the weather pattern over the short-term forecast. The high-pressure ridge, which kept us dry Sunday and Monday, will weaken and shift East Monday night. This will allow for rain/snow showers and cooler air to enter the area Tuesday. This doesn't appear to be a particularly wet system and any snow accumulations ought to be modest at best.
Look for showers to begin in the Olympics mid-morning Tuesday before spreading into the Cascades later in the day. The onset of precipitation should usher in cooler air and increasing winds. While temperatures are expected to cool throughout the near term, this is not a cold storm. Expect snow-levels to bottom out in the 3500-4000 foot range. Wednesday appears mostly dry before our next chance of precipitation arrives late in the afternoon.
Weather Forecast
Hurricane Ridge
| Monday Night | Partly cloudy. Mild. |
| Tuesday | Scattered showers. Moderate SW winds increasing throughout the day. |
Mt. Baker
| Monday Night | Partly cloudy. |
| Tuesday | Mostly cloudy. Scattered showers in the afternoon. |
Washington Pass and Leavenworth
| Monday Night | Partly cloudy. Inversion possible in mountain valleys. |
| Tuesday | Partly cloudy. |
Stevens and Snoqualmie Pass
| Monday Night | Partly cloudy. Light east winds at Pass level. |
| Tuesday | Mostly cloudy. Scattered showers in the afternoon. Light and variable winds at Pass level. |
Mt. Rainier, Crystal and White Pass
| Monday Night | Partly cloudy. |
| Tuesday | Mostly cloudy. Scattered showers in the afternoon particularly near Mt Rainier. |
Mt. Hood
| Monday Night | Partly cloudy. |
| Tuesday | Mostly cloudy. Scattered showers in the afternoon. Moderate SW winds increasing. |
Issued: 2:23 PM PST Monday, December 9, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Evening | Freezing Level * | 8000' | 5500' | 4500' | 4500' | 5000' | 5500' | 6000' | 6500' |
| Monday Night | Freezing Level * | 7000' | 5000' | 4000' | 4000' | 4500' | 4500' | 5000' | 6000' |
| Tuesday Morning | Freezing Level | 6000' | 4500' | 4500' | 4500' | 5000' | 5000' | 5500' | 6500' |
| Tuesday Afternoon | Snow Level | 5000' | 4000' | 3500' | 3500' | 4000' | 4500' | 5000' | 5500' |
| Tuesday Evening | Snow Level | 4500' | 4000' | 3500' | 3500' | 4000' | 4500' | 4500' | 5000' |
| Tuesday Night | Snow Level | 3500' | 3500' | 3000' | 3000' | 3500' | 4000' | 4000' | 4500' |
| Wednesday Morning | Snow Level | 4000' | 3500' | 3000' | 3000' | 3500' | 3500' | 3500' | 4500' |
| Wednesday Afternoon | Snow Level | 4000' | 4000' | 3000' | 3000' | 3500' | 4000' | 4000' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Monday Night |
Freezing Level 7000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 6000' |
| Tuesday Afternoon |
Snow Level 5000' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 4000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Freezing Level 5500' (Easterly Flow *) |
| Monday Night |
Freezing Level 5000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 4500' |
| Tuesday Afternoon |
Snow Level 4000' |
| Tuesday Evening |
Snow Level 4000' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4000' |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 4500' (Easterly Flow *) |
| Monday Night |
Freezing Level 4000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 4500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Evening |
Snow Level 3500' |
| Tuesday Night |
Snow Level 3000' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday Afternoon |
Snow Level 3000' |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Freezing Level 4500' (Easterly Flow *) |
| Monday Night |
Freezing Level 4000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 4500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Evening |
Snow Level 3500' |
| Tuesday Night |
Snow Level 3000' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday Afternoon |
Snow Level 3000' |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 5000' (Easterly Flow *) |
| Monday Night |
Freezing Level 4500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Snow Level 4000' |
| Tuesday Evening |
Snow Level 4000' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 3500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 5500' (Easterly Flow *) |
| Monday Night |
Freezing Level 4500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Snow Level 4500' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Freezing Level 6000' (Easterly Flow *) |
| Monday Night |
Freezing Level 5000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 5500' |
| Tuesday Afternoon |
Snow Level 5000' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4000' |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Monday Night |
Freezing Level 6000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 6500' |
| Tuesday Afternoon |
Snow Level 5500' |
| Tuesday Evening |
Snow Level 5000' |
| Tuesday Night |
Snow Level 4500' |
| Wednesday Morning |
Snow Level 4500' |
| Wednesday Afternoon |
Snow Level 5000' |
* 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
| Monday 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 | LT 0.10 |
| Mt Baker Ski Area | 0 | LT 0.10 | LT 0.10 | LT 0.10 |
| Washington Pass | 0 | 0 | LT 0.10 | 0 |
| Leavenworth | 0 | 0 | LT 0.10 | 0 |
| Stevens Pass | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Mission Ridge | 0 | 0 | LT 0.10 | 0 |
| Crystal Mt | 0 | LT 0.10 | LT 0.10 | LT 0.10 |
| Paradise | 0 | LT 0.25 | 0.25 | LT 0.10 |
| White Pass | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Mt Hood Meadows | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Timberline | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.10 |
| Sunday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.10 |
| Sunday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Sunday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Sunday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | 0 |
| Sunday Night | LT 0.10 |
| Sunday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.10 |
| Sunday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.25 |
| Sunday Night | 0.25 |
| Sunday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Sunday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Sunday | LT 0.10 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Sunday | LT 0.10 |
| Sunday Night | LT 0.25 |
| Sunday | LT 0.10 |
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: 2:23 PM PST Monday, December 9, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | S 5 - 15 | S 5 - 15 | SSE 5 - 15 | S 5 - 15 | S 5 - 15 |
| Monday Night | SW 5 - 15 | SW 5 - 15 | SW 5 - 15 | SW 5 - 15 | SW 5 - 15 |
| Tuesday Morning | SW 10 - 20 | SSW 10 - 20 | W 10 - 20 | WSW 5 - 15 | W 10 - 20 |
| Tuesday Afternoon | SW 15 - 25 | SSW 10 - 20 | W 10 - 20 | W 10 - 20 | W 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | S 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | SW 10 - 20 |
| Tuesday Afternoon | SW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | S 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | SSW 10 - 20 |
| Tuesday Afternoon | SSW 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | SSE 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | S 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | WSW 5 - 15 |
| Tuesday Afternoon | W 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | S 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | S 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | SW 10 - 20 |
| Tuesday Afternoon | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | S 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | SSW 10 - 20 |
| Tuesday Afternoon | SSW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | SSE 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | S 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | WSW 5 - 15 |
| Tuesday Afternoon | W 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | S 5 - 15 |
| Monday Night | SW 5 - 15 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 15 - 25 |
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 | |
|---|---|---|---|---|---|
| Monday Evening | NW 10 - 20 | NW 15 - 25 | NW 10 - 20 | NW 10 - 20 | W 5 - 15 |
| Monday Night | WSW 15 - 25 | W 15 - 25 | W 10 - 20 | W 10 - 20 | W 10 - 20 |
| Tuesday Morning | SW 20 - 30 | W 15 - 25 | W 20 - 30 | W 20 - 30 | WSW 15 - 25 |
| Tuesday Afternoon | WSW 20 - 30 | W 20 - 30 | W 25 - 35 | W 20 - 30 | W 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | NW 10 - 20 |
| Monday Night | WSW 15 - 25 |
| Tuesday Morning | SW 20 - 30 |
| Tuesday Afternoon | WSW 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 15 - 25 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | W 20 - 30 |
| Tuesday Afternoon | W 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | NW 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | W 20 - 30 |
| Tuesday Afternoon | W 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | W 5 - 15 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | WSW 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
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: 2:23 PM PST Monday, December 9, 2019
Extended Weather Synopsis for Sunday night through Sunday
A stronger more developed storm system should begin to impact the region Wednesday night. Right now the weather models seem to agree that this system will bring significant rain and snow to the mountains with snow-levels lowering throughout the forecast period. It looks like we'll find snow at many mountain trailhead locations before the precipitation ends Friday night. Keep your eye on this storm. It has the potential to significantly impact the mountains and potential avalanche hazard.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Snow Level | 3500' - 4500' | 3500' - 4500' | 4500' - 5500' | * |
| Thursday | Snow Level | 3500' - 4500' | 3500' - 4500' | 4500' - 6000' | |
| Thursday Night | Snow Level | 2500' - 4000' | 3000' - 4500' | 4000' - 5500' | |
| Friday | Snow Level | 2500' - 3500' | 2500' - 3500' | 3500' - 4500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Snow Level 3500' - 4500' (Easterly Flow *) |
| Thursday |
Snow Level 3500' - 4500' |
| Thursday Night |
Snow Level 2500' - 4000' |
| Friday |
Snow Level 2500' - 3500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Snow Level 3500' - 4500' (Easterly Flow *) |
| Thursday |
Snow Level 3500' - 4500' |
| Thursday Night |
Snow Level 3000' - 4500' |
| Friday |
Snow Level 2500' - 3500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Snow Level 4500' - 5500' (Easterly Flow *) |
| Thursday |
Snow Level 4500' - 6000' |
| Thursday Night |
Snow Level 4000' - 5500' |
| Friday |
Snow Level 3500' - 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Previous forecast from Dec 8, 2019
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