Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Tuesday & Thursday
On Tuesday a front will cross the Pacific Northwest from west to east. Slightly elevated snow levels this morning will be followed by lowering snow levels and a wind shift from southerly to westerly in the afternoon and night. On Wednesday, a shortwave ridge moves across the Pacific Northwest with a temporary decrease in winds and precipitation. On Wednesday night, another front approaches the Pacific Northwest coastal waters.
Weather Forecast
Olympics
| Tuesday |
Increasing light rain and snow becoming moderate by late morning. Precipitation will change to showers in the afternoon. |
| Tuesday Night |
Decreasing light rain and snow showers. |
| Wednesday |
Scattered light rain and snow showers. |
| Wednesday Night |
Increasing light rain and snow. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Tuesday |
Increasing rain and snow becoming moderate to occasionally heavy by late morning and continuing in the afternoon. |
| Tuesday Night |
Light to moderate showers in the evening, heaviest in convergence zone from Stevens to the Mountain Loop. Light showers after midnight, heaviest in the North Cascades. |
| Wednesday |
Light showers gradually ending, first from the south then the north. |
| Wednesday Night |
Increasing light rain and snow in the north with increasing clouds central and south. |
East slopes of the Washington Cascades
| Tuesday |
Increasing rain and snow becoming moderate to occasionally heavy by late morning and continuing in the afternoon. Heaviest higher elevations. |
| Tuesday Night |
Light to moderate showers this evening decreasing to light showers after midnight. Heaviest higher elevations. |
| Wednesday |
Light showers mainly higher elevations gradually ending, first from the south then the north. |
| Wednesday Night |
Increasing light rain and snow in the north after midnight with increasing clouds central and south. |
Mt. Hood Area
| Tuesday |
Increasing rain and snow becoming moderate to occasionally heavy by late morning and continuing in the afternoon. |
| Tuesday Night |
Moderate showers in the evening with light showers after midnight. |
| Wednesday |
Decreasing clouds. |
| Wednesday Night |
High clouds increasing after midnight. |
Issued: 1:06 PM PST Tuesday, November 28, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Tuesday Morning | Snow Level * | 5000' | 3000' | 2500' | ' | ' | 3500' | ' | 5500' |
| Tuesday Afternoon | Snow Level | 3000' | 2500' | 3000' | ' | ' | 3000' | ' | 3500' |
| Tuesday Night | Snow Level | 2500' | 2000' | 1500' | ' | ' | 2500' | ' | 2500' |
| Wednesday Morning | Snow Level | 3500' | 2500' | 2500' | ' | ' | 3000' | ' | 3500' |
| Wednesday Afternoon | Snow Level | 4000' | 3000' | 3000' | ' | ' | 3500' | ' | 4500' |
| Wednesday Night | Snow Level * | 5000' | 3500' | 2000' | ' | ' | 4000' | ' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 5000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 3000' |
| Tuesday Night |
Snow Level 2500' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4000' |
| Wednesday Night |
Snow Level 5000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 2500' |
| Tuesday Night |
Snow Level 2000' |
| Wednesday Morning |
Snow Level 2500' |
| Wednesday Afternoon |
Snow Level 3000' |
| Wednesday Night |
Snow Level 3500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 2500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 3000' |
| Tuesday Night |
Snow Level 1500' |
| Wednesday Morning |
Snow Level 2500' |
| Wednesday Afternoon |
Snow Level 3000' |
| Wednesday Night |
Snow Level 2000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 3500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 3000' |
| Tuesday Night |
Snow Level 2500' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday Afternoon |
Snow Level 3500' |
| Wednesday Night |
Snow Level 4000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 5500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Night |
Snow Level 2500' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Snow Level 4500' |
| Wednesday Night |
Snow Level 5000' (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
| Thursday | Thursday | |
|---|---|---|
| Hurricane Ridge | 0.25 - 0.50 | LT 0.25 |
| Mt Baker Ski Area | 0.75 - 1.00 | LT 0.25 |
| Washington Pass | 0 - 0.75 | LT 0.10 |
| Stevens Pass | 1.00 - 1.00 | LT 0.10 |
| Snoqualmie Pass | 0 - 1.00 | LT 0.10 |
| Mission Ridge | LT 0.25 | LT 0.10 |
| Crystal Mt | 0 - 0.50 | LT 0.10 |
| Paradise | 0 - 1.50 | LT 0.10 |
| White Pass | 0 - 0.50 | LT 0.10 |
| Mt Hood Meadows | 0 - 0.75 | LT 0.10 |
| Timberline | 0.75 - 1.00 | 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: 1:06 PM PST Tuesday, November 28, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Morning | SSW 25 - 40 | S 20 - 30 | SSE 20 - 30 | --- - | SSW 20 - 30 |
| Tuesday Afternoon | W 15 - 20 | WSW 10 - 15 | W 20 - 30 | --- - | W 25 - 35 |
| Tuesday Night | W 10 - 20 | WSW 10 - 15 | W 15 - 25 | --- - | W 20 - 30 |
| Wednesday Morning | SW 10 - 15 | SW 5 - 10 | WSW 5 - 10 | --- - | WSW 5 - 10 |
| Wednesday Afternoon | SSW 10 - 15 | SSW 10 - 15 | WSW 0 - 10 | --- - | SSW 0 - 10 |
| Wednesday Night | S 25 - 35 | SSE 15 - 20 | S 15 - 20 | --- - | SW 10 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Morning | SSW 25 - 40 |
| Tuesday Afternoon | W 15 - 20 |
| Tuesday Night | W 10 - 20 |
| Wednesday Morning | SW 10 - 15 |
| Wednesday Afternoon | SSW 10 - 15 |
| Wednesday Night | S 25 - 35 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Morning | S 20 - 30 |
| Tuesday Afternoon | WSW 10 - 15 |
| Tuesday Night | WSW 10 - 15 |
| Wednesday Morning | SW 5 - 10 |
| Wednesday Afternoon | SSW 10 - 15 |
| Wednesday Night | SSE 15 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Morning | SSE 20 - 30 |
| Tuesday Afternoon | W 20 - 30 |
| Tuesday Night | W 15 - 25 |
| Wednesday Morning | WSW 5 - 10 |
| Wednesday Afternoon | WSW 0 - 10 |
| Wednesday Night | S 15 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Morning | SSW 20 - 30 |
| Tuesday Afternoon | W 25 - 35 |
| Tuesday Night | W 20 - 30 |
| Wednesday Morning | WSW 5 - 10 |
| Wednesday Afternoon | SSW 0 - 10 |
| Wednesday Night | SW 10 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Morning | SSW 25 - 40 |
| Tuesday Afternoon | W 15 - 20 |
| Tuesday Night | W 10 - 20 |
| Wednesday Morning | SW 10 - 15 |
| Wednesday Afternoon | SSW 10 - 15 |
| Wednesday Night | S 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Morning | S 20 - 30 |
| Tuesday Afternoon | WSW 10 - 15 |
| Tuesday Night | WSW 10 - 15 |
| Wednesday Morning | SW 5 - 10 |
| Wednesday Afternoon | SSW 10 - 15 |
| Wednesday Night | SSE 15 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Morning | SSE 20 - 30 |
| Tuesday Afternoon | W 20 - 30 |
| Tuesday Night | W 15 - 25 |
| Wednesday Morning | WSW 5 - 10 |
| Wednesday Afternoon | WSW 0 - 10 |
| Wednesday Night | S 15 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Morning | SSW 20 - 30 |
| Tuesday Afternoon | W 25 - 35 |
| Tuesday Night | W 20 - 30 |
| Wednesday Morning | WSW 5 - 10 |
| Wednesday Afternoon | SSW 0 - 10 |
| Wednesday Night | SW 10 - 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 | |
|---|---|---|---|---|---|
| Tuesday Morning | SW 35 - 45 | SW 35 - 45 | SW 40 - 55 | --- - | SW 35 - 45 |
| Tuesday Afternoon | WSW 20 - 30 | WSW 20 - 30 | WSW 30 - 40 | --- - | WSW 35 - 45 |
| Tuesday Night | W 20 - 30 | W 35 - 45 | W 35 - 45 | --- - | W 35 - 45 |
| Wednesday Morning | W 20 - 30 | W 20 - 30 | WNW 25 - 35 | --- - | WNW 10 - 20 |
| Wednesday Afternoon | WSW 20 - 30 | WSW 15 - 20 | W 15 - 20 | --- - | WNW 15 - 20 |
| Wednesday Night | WSW 20 - 30 | WSW 25 - 35 | WSW 35 - 45 | --- - | WSW 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Morning | SW 35 - 45 |
| Tuesday Afternoon | WSW 20 - 30 |
| Tuesday Night | W 20 - 30 |
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | WSW 20 - 30 |
| Wednesday Night | WSW 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Morning | SW 35 - 45 |
| Tuesday Afternoon | WSW 20 - 30 |
| Tuesday Night | W 35 - 45 |
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | WSW 15 - 20 |
| Wednesday Night | WSW 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Morning | SW 40 - 55 |
| Tuesday Afternoon | WSW 30 - 40 |
| Tuesday Night | W 35 - 45 |
| Wednesday Morning | WNW 25 - 35 |
| Wednesday Afternoon | W 15 - 20 |
| Wednesday Night | WSW 35 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Morning | SW 35 - 45 |
| Tuesday Afternoon | WSW 35 - 45 |
| Tuesday Night | W 35 - 45 |
| Wednesday Morning | WNW 10 - 20 |
| Wednesday Afternoon | WNW 15 - 20 |
| Wednesday Night | WSW 20 - 30 |
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: 1:06 PM PST Tuesday, November 28, 2017
Extended Weather Synopsis for Thursday night through Thursday
On Thursday, a WSW flow carries a weakening front across the Northwest. On Friday a front approaches over the Pacific Northwest coastal waters and some moisture will arrive mainly to the Olympics and Northwest Cascades on a SW flow in advance of this system. The same approaching (relatively strong) front should move over the Pacific Northwest on Saturday.
Extended Weather
All Zones
On Thursday, moderate rain and snow develops first in the Olympics and Northwest Cascades in the early morning hours and spreads to the remainder of the Cascades by later in the morning. The rain and snow greatly decreases by afternoon and evening.
On Friday, light rain and snow brushes the forecasting zones, mainly in the Olympics and North Cascades. Moderate rain arrives Friday night.
Moderate to heavy rain on Saturday becomes showers on Saturday night.
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 28, 2017
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.