Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Tuesday & Wednesday
The Pacific Northwest will remain in a relatively stationary pattern on Tuesday and Wednesday with NW flow aloft driven by the gradient between a high pressure offshore and a deep low over Hudson's Bay. The high pressure should move slightly eastward, toward our region during the day on Tuesday.
Light drizzle or very light snow has been seen early Tuesday morning as a very weak convergence zone fizzles out from a long since departed system's post-frontal flow.
The next approaching weak upper level trough will bring a warm front across the region, scouring out the cooler air in place. Warming will be significant late Tuesday night through Wednesday with most areas of the Cascades seeing a changeover to rain at 5000 ft around 4 AM on Wednesday, with a possible mix with rain at Washington Pass Wednesday early afternoon as warming spreads northward and to higher elevations throughout the day. Light rain and snow will arrive from Snoqualmie pass, northward, slightly increasing toward the Canadian border from Tuesday afternoon through through Wednesday morning.
Wednesday should witness a drying trend with mostly dry conditions by Wednesday afternoon in all areas except the Mt. Baker area, where some very light rain may linger.
Late Wednesday through Wednesday night, crest-level winds will increase from the moderate range to occasionally strong out ahead of a better organized shortwave poised to impact our region on Thursday. This system will feature a sharp cold front when it arrives.
Weather Forecast
Olympics
| Tuesday | Increasing clouds with a chance of light rain or snow. |
| Tuesday Night | Increasing light rain or snow, particularly after midnight. |
| Wednesday | Partly cloudy. |
| Wednesday Night | Clouds increasing and lowering. W-SW winds becoming moderate to strong at Hurricane Ridge. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Tuesday | Decreasing drizzle, light rain or snow showers in weak convergence over the central Cascades in the morning, ending. Then, increasing light rain or snow from Snoqualmie Pass northward from late morning onward. |
| Tuesday Night | Light rain and snow continues from Snoqualmie Pass northward. Warming begins overnight. |
| Wednesday | Light rain and high elevation snow showers decreasing or ending from Snoqualmie pass northward, but likely lingering near Mt. Baker in the afternoon. |
| Wednesday Night | Increasing light to to moderate rain or snow in the north by morning. Increasing alpine winds becoming moderate to strong. |
East Slopes of the Washington Cascades
| Tuesday | Mostly sunny east of the Cascade crest with clouds spilling over near the crest. Increasing clouds and very light rain or snow developing near the crest form late morning onward. |
| Tuesday Night | Light rain and snow continues near the Cascade crest with clear weather further east. |
| Wednesday | Light rain or high elevation snow showers decreasing or ending during the morning hours near the Cascade Crest from Snoqualmie pass northward. |
| Wednesday Night | Increasing light to moderate rain or snow in the north by morning. Increasing alpine winds becoming moderate to strong. |
Mt. Hood
| Tuesday | Partly to mostly cloudy in the morning with decreasing clouds in the afternoon. Freezing levels rising strongly during the day. |
| Tuesday Night | Fair weather with mostly clear skies and high freezing levels. |
| Wednesday | Mostly sunny skies. High freezing levels. |
| Wednesday Night | Mostly clear with high clouds increasing by morning. |
Issued: 7:42 AM PST Tuesday, February 6, 2018
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' | 3500' | ' | ' | 3500' | ' | 5500' |
| Tuesday Afternoon | Snow Level | 5500' | 3500' | 3500' | ' | ' | 3500' | ' | 7500' |
| Tuesday Night | Snow Level | 6500' | 3500' | 3500' | ' | ' | 4000' | ' | 8000' |
| Wednesday Morning | Snow Level | 7000' | 4000' | 4000' | ' | ' | 5000' | ' | 8500' |
| Wednesday Afternoon | Snow Level | 7500' | 5000' | 5500' | ' | ' | 6000' | ' | 9000' |
| Wednesday Night | Snow Level | 7000' | 5500' | 5500' | ' | ' | 7000' | ' | 9000' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 5000' |
| Tuesday Afternoon |
Snow Level 5500' |
| Tuesday Night |
Snow Level 6500' |
| Wednesday Morning |
Snow Level 7000' |
| Wednesday Afternoon |
Snow Level 7500' |
| Wednesday Night |
Snow Level 7000' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 3000' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 5000' |
| Wednesday Night |
Snow Level 5500' |
| Washington Pass | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 5500' |
| Wednesday Night |
Snow Level 5500' |
| Leavenworth | Elevation |
|---|---|
| Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 5000' |
| Wednesday Afternoon |
Snow Level 6000' |
| Wednesday Night |
Snow Level 7000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Snow Level ' |
| Wednesday Morning |
Snow Level ' |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 5500' |
| Tuesday Afternoon |
Snow Level 7500' |
| Tuesday Night |
Snow Level 8000' |
| Wednesday Morning |
Snow Level 8500' |
| Wednesday Afternoon |
Snow Level 9000' |
| Wednesday Night |
Snow Level 9000' |
* 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
| Wednesday | Wednesday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | 0.25 - 0.50 | 0.25 - 0.50 |
| Washington Pass | LT 0.25 | LT 0.25 |
| Stevens Pass | LT 0.25 | LT 0.25 |
| Snoqualmie Pass | LT 0.25 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | 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: 7:42 AM PST Tuesday, February 6, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Morning | W 10 - 20 | SW 5 - 15 | W 10 - 20 | --- - | W 15 - 25 |
| Tuesday Afternoon | W 10 - 20 | WSW 10 - 20 | W 10 - 20 | --- - | W 15 - 25 |
| Tuesday Night | W 20 - 30 | WSW 15 - 25 | W 10 - 20 | --- - | WNW 20 - 30 |
| Wednesday Morning | W 20 - 30 | WSW 10 - 20 | W 15 - 25 | --- - | WNW 15 - 25 |
| Wednesday Afternoon | W 15 - 25 | W 15 - 25 | W 15 - 25 | --- - | W 20 - 30 |
| Wednesday Night | WSW 30 - 50 | WSW 25 - 35 | W 30 - 40 | --- - | WSW 25 - 35 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 10 - 20 |
| Tuesday Night | W 20 - 30 |
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | W 15 - 25 |
| Wednesday Night | WSW 30 - 50 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | WSW 10 - 20 |
| Tuesday Night | WSW 15 - 25 |
| Wednesday Morning | WSW 10 - 20 |
| Wednesday Afternoon | W 15 - 25 |
| Wednesday Night | WSW 25 - 35 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 10 - 20 |
| Tuesday Night | W 10 - 20 |
| Wednesday Morning | W 15 - 25 |
| Wednesday Afternoon | W 15 - 25 |
| Wednesday Night | W 30 - 40 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Tuesday Night | WNW 20 - 30 |
| Wednesday Morning | WNW 15 - 25 |
| Wednesday Afternoon | W 20 - 30 |
| Wednesday Night | WSW 25 - 35 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 10 - 20 |
| Tuesday Night | W 20 - 30 |
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | W 15 - 25 |
| Wednesday Night | WSW 30 - 50 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | WSW 10 - 20 |
| Tuesday Night | WSW 15 - 25 |
| Wednesday Morning | WSW 10 - 20 |
| Wednesday Afternoon | W 15 - 25 |
| Wednesday Night | WSW 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 10 - 20 |
| Tuesday Night | W 10 - 20 |
| Wednesday Morning | W 15 - 25 |
| Wednesday Afternoon | W 15 - 25 |
| Wednesday Night | W 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 |
| Tuesday Night | WNW 20 - 30 |
| Wednesday Morning | WNW 15 - 25 |
| Wednesday Afternoon | W 20 - 30 |
| Wednesday Night | WSW 25 - 35 |
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 | WNW 30 - 40 | WNW 25 - 35 | NW 45 - 65 | --- - | NW 45 - 65 |
| Tuesday Afternoon | NW 35 - 50 | NW 35 - 50 | NW 40 - 60 | --- - | NW 30 - 40 |
| Tuesday Night | WNW 35 - 50 | WNW 40 - 60 | NW 40 - 60 | --- - | NW 35 - 50 |
| Wednesday Morning | WNW 40 - 60 | WNW 45 - 65 | WNW 50 - 70 | --- - | NW 46 - 50 |
| Wednesday Afternoon | W 45 - 65 | W 55 - 75 | W 60 - 80 | --- - | WNW 30 - 40 |
| Wednesday Night | WSW 55 - 75 | WSW 60 - 80 | WSW 65 - 85 | --- - | W 40 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Morning | WNW 30 - 40 |
| Tuesday Afternoon | NW 35 - 50 |
| Tuesday Night | WNW 35 - 50 |
| Wednesday Morning | WNW 40 - 60 |
| Wednesday Afternoon | W 45 - 65 |
| Wednesday Night | WSW 55 - 75 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Morning | WNW 25 - 35 |
| Tuesday Afternoon | NW 35 - 50 |
| Tuesday Night | WNW 40 - 60 |
| Wednesday Morning | WNW 45 - 65 |
| Wednesday Afternoon | W 55 - 75 |
| Wednesday Night | WSW 60 - 80 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Morning | NW 45 - 65 |
| Tuesday Afternoon | NW 40 - 60 |
| Tuesday Night | NW 40 - 60 |
| Wednesday Morning | WNW 50 - 70 |
| Wednesday Afternoon | W 60 - 80 |
| Wednesday Night | WSW 65 - 85 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Wednesday Morning | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Morning | NW 45 - 65 |
| Tuesday Afternoon | NW 30 - 40 |
| Tuesday Night | NW 35 - 50 |
| Wednesday Morning | NW 46 - 50 |
| Wednesday Afternoon | WNW 30 - 40 |
| Wednesday Night | W 40 - 60 |
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 Feb 5, 2018
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.