Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Tuesday & Tuesday
A strong early December ridge is moving into the region behind a departed frontal system, bringing our region dry weather under mostly sunny skies on Tuesday. Tuesday morning starts out chilly, with temperatures in the upper teens to upper twenties at most NWAC stations with light winds. Over the course of the day, temperatures moderate much more rapidly west of the Cascade Crest, driving the development of a pressure difference and increasing E flow through the passes. Warmer temperatures should be felt at some upper elevations Tuesday afternoon (Mt. Hood, Mt. Rainier, and Hurricane Ridge), however, lower elevations and the passes should closer to the freezing mark under inversion conditions and the cooling E flow.
The E flow will become moderate to strong overnight, peaking early Wednesday morning before decreasing later Wednesday. This will drive moderate to strong winds at times through the passes and mountain gaps. The strongest winds are likely to be just west of the passes.
More locations should very balmy conditions on Wednesday (freezing levels 10000-11500 ft), but we expect the passes to stay closer to freezing below around 5000 ft.
Weather Forecast
Hurricane Ridge
| Tuesday | Clear skies with light and variable winds switching E. Cool temperatures in the morning with temperatures rising rapidly in the middle of the day. |
Mt. Baker
| Tuesday | Clear skies. Light winds. Cool temperatures. |
Washington Pass and Leavenworth
| Tuesday | Clear skies. Inversion developing. Light winds. |
Stevens and Snoqualmie Pass
| Tuesday | Clear skies. Inversion developing. Light winds. Light E winds developing at 5000 ft and through the passes. |
Mt. Rainier, Crystal and White Pass
| Tuesday | Clear skies. Inversion developing. Cool in the morning, mild in the afternoon. Light winds. |
Mt. Hood
| Tuesday | Clear skies. Inversion developing with 6000 ft temperatures hovering around freezing all day. Alpine temperatures warming above freezing in the afternoon. Light winds becoming light to moderate. |
Issued: 7:10 AM PST Tuesday, December 1, 2020
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Tuesday Morning | Freezing Level | 3000' | 1500' | 2500' | 2000' | 2000' | 2500' | 3500' | 3500' |
| Tuesday Afternoon | Freezing Level * | 6000' | 4000' | 3000' | 3500' | 3500' | 3500' | 6500' | 8500' |
| Tuesday Evening | Freezing Level * | 8500' | 7500' | 2500' | 3000' | 3000' | 3000' | 8500' | 9000' |
| Tuesday Night | Freezing Level * | 10500' | 8500' | 3000' | 3000' | 3000' | 3000' | 9000' | 9000' |
| Wednesday Morning | Freezing Level * | 11500' | 9500' | 4000' | 5000' | 5500' | 8500' | 9000' | 9000' |
| Wednesday Afternoon | Freezing Level * | 11500' | 11500' | 4000' | 5000' | 5500' | 10500' | 10500' | 10500' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Morning |
Freezing Level 3000' |
| Tuesday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 8500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 10500' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 11500' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 11500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Morning |
Freezing Level 1500' |
| Tuesday Afternoon |
Freezing Level 4000' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 8500' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9500' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 11500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Tuesday Morning |
Freezing Level 2500' |
| Tuesday Afternoon |
Freezing Level 3000' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 2500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 3000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 4000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Tuesday Morning |
Freezing Level 2000' |
| Tuesday Afternoon |
Freezing Level 3500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 3000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 3000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 5000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Morning |
Freezing Level 2000' |
| Tuesday Afternoon |
Freezing Level 3500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 3000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 3000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 5500' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Morning |
Freezing Level 2500' |
| Tuesday Afternoon |
Freezing Level 3500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 3000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 3000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 8500' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 10500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Morning |
Freezing Level 3500' |
| Tuesday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 8500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 10500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Morning |
Freezing Level 3500' |
| Tuesday Afternoon |
Freezing Level 8500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 10500' (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
| Tuesday | Tuesday Night | Tuesday | |
|---|---|---|---|
| 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | 0 |
| Mt Baker Ski Area | 0 | 0 | 0 |
| Washington Pass | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | 0 |
| Snoqualmie Pass | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 |
| Crystal Mt | 0 | 0 | 0 |
| Paradise | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | 0 | 0 |
| Timberline | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
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: 7:10 AM PST Tuesday, December 1, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Morning | N 0 - 10 | NE 0 - 10 | NE 0 - 10 | NE 0 - 10 | E 5 - 15 |
| Tuesday Afternoon | NNE 0 - 10 | E 0 - 10 | E 5 - 15 | E 0 - 10 | E 10 - 20 |
| Tuesday Evening | ESE 5 - 15 | E 0 - 10 | ESE 10 - 20 | E 5 - 15 | E 15 - 25 |
| Tuesday Night | SE 5 - 15 | E 0 - 10 | ESE 15 - 25 | E 10 - 20 | E 20 - 30 |
| Wednesday Morning | SE 5 - 15 | E 5 - 15 | ESE 15 - 25 | E 15 - 25 | ESE 20 - 30 |
| Wednesday Afternoon | S 5 - 15 | ESE 5 - 15 | ESE 10 - 20 | ESE 10 - 20 | ESE 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Morning | N 0 - 10 |
| Tuesday Afternoon | NNE 0 - 10 |
| Tuesday Evening | ESE 5 - 15 |
| Tuesday Night | SE 5 - 15 |
| Wednesday Morning | SE 5 - 15 |
| Wednesday Afternoon | S 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Morning | NE 0 - 10 |
| Tuesday Afternoon | E 0 - 10 |
| Tuesday Evening | E 0 - 10 |
| Tuesday Night | E 0 - 10 |
| Wednesday Morning | E 5 - 15 |
| Wednesday Afternoon | ESE 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Morning | NE 0 - 10 |
| Tuesday Afternoon | E 5 - 15 |
| Tuesday Evening | ESE 10 - 20 |
| Tuesday Night | ESE 15 - 25 |
| Wednesday Morning | ESE 15 - 25 |
| Wednesday Afternoon | ESE 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Morning | NE 0 - 10 |
| Tuesday Afternoon | E 0 - 10 |
| Tuesday Evening | E 5 - 15 |
| Tuesday Night | E 10 - 20 |
| Wednesday Morning | E 15 - 25 |
| Wednesday Afternoon | ESE 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Morning | E 5 - 15 |
| Tuesday Afternoon | E 10 - 20 |
| Tuesday Evening | E 15 - 25 |
| Tuesday Night | E 20 - 30 |
| Wednesday Morning | ESE 20 - 30 |
| Wednesday Afternoon | ESE 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Morning | N 0 - 10 |
| Tuesday Afternoon | NNE 0 - 10 |
| Tuesday Evening | ESE 5 - 15 |
| Tuesday Night | SE 5 - 15 |
| Wednesday Morning | SE 5 - 15 |
| Wednesday Afternoon | S 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Morning | NE 0 - 10 |
| Tuesday Afternoon | E 0 - 10 |
| Tuesday Evening | E 0 - 10 |
| Tuesday Night | E 0 - 10 |
| Wednesday Morning | E 5 - 15 |
| Wednesday Afternoon | ESE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Morning | NE 0 - 10 |
| Tuesday Afternoon | E 5 - 15 |
| Tuesday Evening | ESE 10 - 20 |
| Tuesday Night | ESE 15 - 25 |
| Wednesday Morning | ESE 15 - 25 |
| Wednesday Afternoon | ESE 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Morning | NE 0 - 10 |
| Tuesday Afternoon | E 0 - 10 |
| Tuesday Evening | E 5 - 15 |
| Tuesday Night | E 10 - 20 |
| Wednesday Morning | E 15 - 25 |
| Wednesday Afternoon | ESE 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Morning | E 5 - 15 |
| Tuesday Afternoon | E 10 - 20 |
| Tuesday Evening | E 15 - 25 |
| Tuesday Night | E 20 - 30 |
| Wednesday Morning | ESE 20 - 30 |
| Wednesday Afternoon | ESE 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 | |
|---|---|---|---|---|---|
| Tuesday Morning | NE 5 - 15 | N 5 - 15 | NNW 15 - 25 | NNW 10 - 20 | N 10 - 20 |
| Tuesday Afternoon | ENE 5 - 15 | NE 5 - 15 | E 5 - 15 | ENE 5 - 15 | ENE 0 - 10 |
| Tuesday Evening | ESE 10 - 20 | E 5 - 15 | E 15 - 25 | E 10 - 20 | SE 10 - 20 |
| Tuesday Night | SE 10 - 20 | SE 10 - 20 | SE 15 - 25 | ESE 10 - 20 | SSE 10 - 20 |
| Wednesday Morning | SSE 20 - 30 | SSE 20 - 30 | SSE 25 - 35 | S 15 - 25 | SSE 10 - 20 |
| Wednesday Afternoon | S 20 - 30 | S 20 - 30 | S 25 - 35 | S 15 - 25 | S 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Morning | NE 5 - 15 |
| Tuesday Afternoon | ENE 5 - 15 |
| Tuesday Evening | ESE 10 - 20 |
| Tuesday Night | SE 10 - 20 |
| Wednesday Morning | SSE 20 - 30 |
| Wednesday Afternoon | S 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Morning | N 5 - 15 |
| Tuesday Afternoon | NE 5 - 15 |
| Tuesday Evening | E 5 - 15 |
| Tuesday Night | SE 10 - 20 |
| Wednesday Morning | SSE 20 - 30 |
| Wednesday Afternoon | S 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Morning | NNW 15 - 25 |
| Tuesday Afternoon | E 5 - 15 |
| Tuesday Evening | E 15 - 25 |
| Tuesday Night | SE 15 - 25 |
| Wednesday Morning | SSE 25 - 35 |
| Wednesday Afternoon | S 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Morning | NNW 10 - 20 |
| Tuesday Afternoon | ENE 5 - 15 |
| Tuesday Evening | E 10 - 20 |
| Tuesday Night | ESE 10 - 20 |
| Wednesday Morning | S 15 - 25 |
| Wednesday Afternoon | S 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Morning | N 10 - 20 |
| Tuesday Afternoon | ENE 0 - 10 |
| Tuesday Evening | SE 10 - 20 |
| Tuesday Night | SSE 10 - 20 |
| Wednesday Morning | SSE 10 - 20 |
| Wednesday Afternoon | S 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Nov 30, 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.