Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Monday & Thursday
Warm frontal moisture is on the proverbial doorstep this morning with radar showing heavier precipitation glancing the northern Olymipc peninsula and parts of NE Whatcom county. Precipitation should largely stay in this position and likely slightly shift north today keeping the majority of the area dry. Mild temperatures and high freezing/snow levels will be the big story today, so for areas in the Olympics and north Cascades that do see precipitation, it will be in liquid form along with moderate to strong S-SW winds. Cool offshore easterly flow in the Passes is causing temperature inversions at Pass level. While that trend will continue today, the W-SW aloft is strong enough that warm air is overriding the cooler surface air with upper elevation temperatures well above freezing.
The Washington Pass area will likely fluctuate between above and below freezing temperatures today. That will change tonight as W-SW winds increase and push in high freezing levels even into the Northeast Cascades along with light to moderate precipitation. More moderate precipitation will start in the northwest Cascades this evening and barely make it down to the I-90 and Hwy 2 corridors by early Tuesday morning. In general the frontal boundary's southern progression has slowed, and it looks to weaken and eventually wash out during the day on Tuesday. This means a slow cooling trend, rain for almost all elevations, and lighter precipitation amounts for the south Washington Cascades and Mt Hood. Westerly ridgeline winds will also be strong through tomorrow as the frontal boundary sags south.
Weather Forecast
Hurricane Ridge
| Monday | Cloudy with periods of rain. Windy and mild. |
Mt. Baker
| Monday | Cloudy with periods of rain. Windy and mild. |
Washington Pass and Leavenworth
| Monday | Cloudy. Warming trend. |
Stevens and Snoqualmie Pass
| Monday | Cloudy, periods of filtered sunshine possible. Mild. |
Mt. Rainier, Crystal and White Pass
| Monday | Mostly cloudy with filtered sunshine. Mild. |
Mt. Hood
| Monday | Partly to mostly sunny with periods of high clouds. Mild. |
Issued: 7:11 AM PST Monday, December 7, 2020
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Morning | Freezing Level * | 7500' | 6500' | 4000' | 6000' | 8000' | 9000' | 9000' | 11500' |
| Monday Afternoon | Freezing Level * | 9000' | 6500' | 4500' | 8000' | 9000' | 9000' | 10000' | 11500' |
| Monday Evening | Snow Level * | 10000' | 7000' | 7500' | 9000' | 9000' | 9000' | 9000' | 12000' |
| Monday Night | Snow Level | 10000' | 8000' | 8500' | 9000' | 9000' | 9000' | 9000' | 12000' |
| Tuesday Morning | Snow Level | 7000' | 6000' | 8000' | 8000' | 8000' | 8000' | 8000' | 11000' |
| Tuesday Afternoon | Snow Level | 6000' | 5000' | 6000' | 7000' | 6000' | 6000' | 7000' | 8000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning |
Freezing Level 7500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 9000' (Easterly Flow *) |
| Monday Evening |
Snow Level 10000' (Easterly Flow *) |
| Monday Night |
Snow Level 10000' |
| Tuesday Morning |
Snow Level 7000' |
| Tuesday Afternoon |
Snow Level 6000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning |
Freezing Level 6500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Monday Evening |
Snow Level 7000' (Easterly Flow *) |
| Monday Night |
Snow Level 8000' |
| Tuesday Morning |
Snow Level 6000' |
| Tuesday Afternoon |
Snow Level 5000' |
| Washington Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 4500' (Easterly Flow *) |
| Monday Evening |
Snow Level 7500' (Easterly Flow *) |
| Monday Night |
Snow Level 8500' |
| Tuesday Morning |
Snow Level 8000' |
| Tuesday Afternoon |
Snow Level 6000' |
| Leavenworth | Elevation |
|---|---|
| Monday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Monday Evening |
Snow Level 9000' (Easterly Flow *) |
| Monday Night |
Snow Level 9000' |
| Tuesday Morning |
Snow Level 8000' |
| Tuesday Afternoon |
Snow Level 7000' |
| Stevens Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 9000' (Easterly Flow *) |
| Monday Evening |
Snow Level 9000' (Easterly Flow *) |
| Monday Night |
Snow Level 9000' |
| Tuesday Morning |
Snow Level 8000' |
| Tuesday Afternoon |
Snow Level 6000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 9000' (Easterly Flow *) |
| Monday Evening |
Snow Level 9000' (Easterly Flow *) |
| Monday Night |
Snow Level 9000' |
| Tuesday Morning |
Snow Level 8000' |
| Tuesday Afternoon |
Snow Level 6000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Monday Evening |
Snow Level 9000' (Easterly Flow *) |
| Monday Night |
Snow Level 9000' |
| Tuesday Morning |
Snow Level 8000' |
| Tuesday Afternoon |
Snow Level 7000' |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning |
Freezing Level 11500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 11500' (Easterly Flow *) |
| Monday Evening |
Snow Level 12000' (Easterly Flow *) |
| Monday Night |
Snow Level 12000' |
| Tuesday Morning |
Snow Level 11000' |
| Tuesday Afternoon |
Snow Level 8000' |
* 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 | Monday Night | Thursday | |
|---|---|---|---|
| 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.25 | 0.25 - 0.50 | 0.50 |
| Mt Baker Ski Area | LT 0.25 | 0.50 - 0.75 | 0.75 -1.00 |
| Washington Pass | 0 | LT 0.25 | 0.50 |
| Leavenworth | 0 | 0 | LT 0.25 |
| Stevens Pass | 0 | LT 0.10 | 0.50 - 0.75 |
| Snoqualmie Pass | 0 | LT 0.10 | 0.50 - 0.75 |
| Mission Ridge | 0 | 0 | LT 0.10 |
| Crystal Mt | 0 | 0 | LT 0.25 |
| Paradise | 0 | 0 | 0.50 |
| White Pass | 0 | 0 | 0.25 |
| Mt Hood Meadows | 0 | 0 | LT 0.10 |
| Timberline | 0 | 0 | LT 0.10 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday | LT 0.25 |
| Monday Night | 0.25 - 0.50 |
| Thursday | 0.50 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday | LT 0.25 |
| Monday Night | 0.50 - 0.75 |
| Thursday | 0.75 -1.00 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | LT 0.25 |
| Thursday | 0.50 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Thursday | LT 0.25 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | LT 0.10 |
| Thursday | 0.50 - 0.75 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | LT 0.10 |
| Thursday | 0.50 - 0.75 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Thursday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Thursday | LT 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Thursday | 0.50 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Thursday | 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Thursday | LT 0.10 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Thursday | 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: 7:11 AM PST Monday, December 7, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | SW 15 - 25 | SSW 20 - 30 | SW 15 - 25 | SW 10 - 20 | SW 5 - 15 |
| Monday Afternoon | S 15 - 25 | S 20 - 30 | SW 15 - 25 | SW 10 - 20 | SW 10 - 20 |
| Monday Evening | SW 30 - 40 | S 25 - 35 | SW 20 - 30 | SW 20 - 30 | SW 5 - 15 |
| Monday Night | SW 30 - 40 | S 35 - 45 | SW 25 - 35 | WSW 25 - 35 | SW 15 - 25 |
| Tuesday Morning | W 15 - 25 | SW 10 - 20 | WSW 30 - 40 | WSW 30 - 40 | SW 15 - 25 |
| Tuesday Afternoon | WNW 10 - 20 | W 5 - 15 | W 15 - 25 | WSW 15 - 25 | W 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | S 15 - 25 |
| Monday Evening | SW 30 - 40 |
| Monday Night | SW 30 - 40 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | WNW 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | SSW 20 - 30 |
| Monday Afternoon | S 20 - 30 |
| Monday Evening | S 25 - 35 |
| Monday Night | S 35 - 45 |
| Tuesday Morning | SW 10 - 20 |
| Tuesday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 15 - 25 |
| Monday Evening | SW 20 - 30 |
| Monday Night | SW 25 - 35 |
| Tuesday Morning | WSW 30 - 40 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 10 - 20 |
| Monday Evening | SW 20 - 30 |
| Monday Night | WSW 25 - 35 |
| Tuesday Morning | WSW 30 - 40 |
| Tuesday Afternoon | WSW 15 - 25 |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | SW 5 - 15 |
| Monday Afternoon | SW 10 - 20 |
| Monday Evening | SW 5 - 15 |
| Monday Night | SW 15 - 25 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | S 15 - 25 |
| Monday Evening | SW 30 - 40 |
| Monday Night | SW 30 - 40 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | WNW 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | SSW 20 - 30 |
| Monday Afternoon | S 20 - 30 |
| Monday Evening | S 25 - 35 |
| Monday Night | S 35 - 45 |
| Tuesday Morning | SW 10 - 20 |
| Tuesday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 15 - 25 |
| Monday Evening | SW 20 - 30 |
| Monday Night | SW 25 - 35 |
| Tuesday Morning | WSW 30 - 40 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 10 - 20 |
| Monday Evening | SW 20 - 30 |
| Monday Night | WSW 25 - 35 |
| Tuesday Morning | WSW 30 - 40 |
| Tuesday Afternoon | WSW 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | SW 5 - 15 |
| Monday Afternoon | SW 10 - 20 |
| Monday Evening | SW 5 - 15 |
| Monday Night | SW 15 - 25 |
| Tuesday Morning | SW 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | SW 35 - 45 | SW 35 - 45 | SW 30 - 40 | SW 20 - 30 | W 10 - 20 |
| Monday Afternoon | SW 35 - 45 | SW 35 - 45 | SW 40 - 50 | SW 30 - 40 | WSW 15 - 25 |
| Monday Evening | SW 35 - 45 | SW 45 - 55 | SW 45 - 55 | SW 35 - 45 | WSW 20 - 30 |
| Monday Night | SW 45 - 55 | SW 55 - 65 | SW 50 - 60 | SW 45 - 55 | W 30 - 40 |
| Tuesday Morning | SW 30 - 40 | WSW 40 - 50 | SW 55 - 65 | SW 45 - 55 | WSW 40 - 50 |
| Tuesday Afternoon | W 20 - 30 | W 25 - 35 | WSW 40 - 50 | WSW 35 - 45 | WSW 35 - 45 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | SW 35 - 45 |
| Monday Afternoon | SW 35 - 45 |
| Monday Evening | SW 35 - 45 |
| Monday Night | SW 45 - 55 |
| Tuesday Morning | SW 30 - 40 |
| Tuesday Afternoon | W 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 35 - 45 |
| Monday Afternoon | SW 35 - 45 |
| Monday Evening | SW 45 - 55 |
| Monday Night | SW 55 - 65 |
| Tuesday Morning | WSW 40 - 50 |
| Tuesday Afternoon | W 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 30 - 40 |
| Monday Afternoon | SW 40 - 50 |
| Monday Evening | SW 45 - 55 |
| Monday Night | SW 50 - 60 |
| Tuesday Morning | SW 55 - 65 |
| Tuesday Afternoon | WSW 40 - 50 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | SW 20 - 30 |
| Monday Afternoon | SW 30 - 40 |
| Monday Evening | SW 35 - 45 |
| Monday Night | SW 45 - 55 |
| Tuesday Morning | SW 45 - 55 |
| Tuesday Afternoon | WSW 35 - 45 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | W 10 - 20 |
| Monday Afternoon | WSW 15 - 25 |
| Monday Evening | WSW 20 - 30 |
| Monday Night | W 30 - 40 |
| Tuesday Morning | WSW 40 - 50 |
| Tuesday Afternoon | WSW 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Dec 6, 2020
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