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 & Wednesday
Light snow showers are continuing and generally decreasing in a cool, weakly unstable airmass on Monday afternoon. A shallow high pressure is building in and and during the overnight hours will bringing generally fair weather.
On Tuesday, a moist bow-shaped front arrives ahead of a low heading north to the Queen Charlotte Islands off the BC coast bringing increasing moderate precipitation and significant warming to the Olympics and Hood regions in the afternoon along with moderate to occasionally strong crest-level winds generally out of the south. The front will stall over the forecast region on Tuesday night, with moderate to occasionally heavy precipitation for the Cascades and further warming. Easterly flow should keep Snoqualmie Pass as snow until after midnight when a changeover to rain is likely and snow at Stevens through the night.
Weather Forecast
Olympics
| Monday | Decreasing light snow showers and cloudy conditions. |
| Monday Night | Mostly cloudy with high clouds lowering and thickening by morning. |
| Tuesday | Increasing light to moderate rain and snow with strong southerly winds in the morning becoming moderate in the afternoon. |
| Tuesday Night | Light rain and snow showers. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Monday | Decreasing light snow showers and cloudy conditions. |
| Monday Night | Mostly cloudy with high clouds lowering and thickening by morning. |
| Tuesday | Increasing light becoming moderate snow late in the day in the north with increasing moderate to occasionally heavy rain and snow in the central and south. Increasing moderate crest-level winds. |
| Tuesday Night | Moderate to occasionally heavy rain and snow. Moderate crest-level winds. |
East Slopes of the Washington Cascades
| Monday | Decreasing light snow showers and cloudy conditions. Mostly sunny away from the crest. |
| Monday Night | Mostly cloudy near the crest and mostly clear away from the crest. |
| Tuesday | Increasing light snow in the north with increasing light to moderate snow in the central and south. Increasing moderate crest-level winds. |
| Tuesday Night | Moderate to occasionally heavy rain and snow. Moderate crest-level winds. |
Mt. Hood
| Monday | Decreasing light with occasional moderate snow showers, decreasing and becoming cloudy. |
| Monday Night | Mostly cloudy. |
| Tuesday | Increasing moderate to occasionally heavy rain and snow. Warming. Increasing moderate SSW crest-level winds. |
| Tuesday Night | Moderate to occasionally heavy rain and snow. More warming during the evening hours. Moderate to strong SSW crest-level winds. |
Issued: 3:42 PM PST Monday, January 22, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Afternoon | Snow Level | 2500' | 2000' | 2000' | ' | ' | 2000' | ' | 3000' |
| Monday Night | Snow Level * | 1500' | 1000' | 0' | ' | ' | 1000' | ' | 2000' |
| Tuesday Morning | Snow Level * | 4000' | 1500' | 1000' | ' | ' | 1500' | ' | 2500' |
| Tuesday Afternoon | Snow Level * | 4000' | 1500' | 1500' | ' | ' | 2000' | ' | 5000' |
| Tuesday Night | Snow Level * | 4500' | 2000' | 1500' | ' | ' | 3500' | ' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 2500' |
| Monday Night |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 4000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 4500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 2000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 0' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 1500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 2000' |
| Monday Night |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 2000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 3500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 3000' |
| Monday Night |
Snow Level 2000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 2500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Tuesday 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
| Wednesday | Wednesday | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | 0.75 - 1.00 |
| Mt Baker Ski Area | 0.25 - 0.50 | 1.00 - 1.50 |
| Washington Pass | 0.25 - 0.50 | 0 - 1.50 |
| Stevens Pass | 0.25 - 0.50 | 0 - 1.50 |
| Snoqualmie Pass | 0.25 - 0.50 | 0 - 2.00 |
| Mission Ridge | LT 0.10 | 1.00 - 1.50 |
| Crystal Mt | LT 0.25 | 2.00 - 2.50 |
| Paradise | 0 - 0.50 | 2.50 - 3.50 |
| White Pass | 0.25 - 0.50 | 1.00 - 1.50 |
| Mt Hood Meadows | 0.25 - 0.50 | 1.00 - 1.50 |
| Timberline | 0.25 - 0.50 | 0 - 1.50 |
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: 3:42 PM PST Monday, January 22, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | WSW 10 - 20 | SW 15 - 25 | WSW 20 - 30 | --- - | WSW 20 - 30 |
| Monday Afternoon | WSW 5 - 15 | SW 10 - 20 | W 15 - 25 | --- - | WSW 10 - 20 |
| Monday Night | SSE 10 - 20 | SSE 10 - | SSE 5 - 15 | --- - | S 10 - 20 |
| Tuesday Morning | S 35 - 50 | ESE 25 - 35 | ESE 20 - 30 | --- - | S 25 - 35 |
| Tuesday Afternoon | SW 20 - 30 | SSE 15 - 25 | ESE 25 - 35 | --- - | SSW 30 - 40 |
| Tuesday Night | SSW 15 - 25 | SE 15 - 25 | SE 20 - 30 | --- - | SSW 35 - 50 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | SSE 10 - 20 |
| Tuesday Morning | S 35 - 50 |
| Tuesday Afternoon | SW 20 - 30 |
| Tuesday Night | SSW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SSE 10 - |
| Tuesday Morning | ESE 25 - 35 |
| Tuesday Afternoon | SSE 15 - 25 |
| Tuesday Night | SE 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | W 15 - 25 |
| Monday Night | SSE 5 - 15 |
| Tuesday Morning | ESE 20 - 30 |
| Tuesday Afternoon | ESE 25 - 35 |
| Tuesday Night | SE 20 - 30 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | S 10 - 20 |
| Tuesday Morning | S 25 - 35 |
| Tuesday Afternoon | SSW 30 - 40 |
| Tuesday Night | SSW 35 - 50 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night | SSE 10 - 20 |
| Tuesday Morning | S 35 - 50 |
| Tuesday Afternoon | SW 20 - 30 |
| Tuesday Night | SSW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SSE 10 - |
| Tuesday Morning | ESE 25 - 35 |
| Tuesday Afternoon | SSE 15 - 25 |
| Tuesday Night | SE 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | W 15 - 25 |
| Monday Night | SSE 5 - 15 |
| Tuesday Morning | ESE 20 - 30 |
| Tuesday Afternoon | ESE 25 - 35 |
| Tuesday Night | SE 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | S 10 - 20 |
| Tuesday Morning | S 25 - 35 |
| Tuesday Afternoon | SSW 30 - 40 |
| Tuesday Night | SSW 35 - 50 |
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 | WSW 30 - 40 | WSW 20 - 30 | W 35 - 50 | --- - | WSW 35 - 50 |
| Monday Afternoon | WSW 20 - 30 | WSW 30 - 40 | WSW 30 - 40 | --- - | W 30 - 40 |
| Monday Night | WSW 20 - 30 | WSW 10 - 20 | WSW 25 - 35 | --- - | SW 20 - 30 |
| Tuesday Morning | SSW 40 - 60 | SSW 30 - 40 | WSW 40 - 60 | --- - | WSW 40 - 60 |
| Tuesday Afternoon | SW 40 - 60 | SW 30 - 40 | WSW 55 - 75 | --- - | WSW 55 - 75 |
| Tuesday Night | SSW 45 - 65 | SSW 20 - 30 | SSW 50 - 70 | --- - | SSW 35 - 50 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | WSW 30 - 40 |
| Monday Afternoon | WSW 20 - 30 |
| Monday Night | WSW 20 - 30 |
| Tuesday Morning | SSW 40 - 60 |
| Tuesday Afternoon | SW 40 - 60 |
| Tuesday Night | SSW 45 - 65 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | WSW 30 - 40 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | SSW 30 - 40 |
| Tuesday Afternoon | SW 30 - 40 |
| Tuesday Night | SSW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | W 35 - 50 |
| Monday Afternoon | WSW 30 - 40 |
| Monday Night | WSW 25 - 35 |
| Tuesday Morning | WSW 40 - 60 |
| Tuesday Afternoon | WSW 55 - 75 |
| Tuesday Night | SSW 50 - 70 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | WSW 35 - 50 |
| Monday Afternoon | W 30 - 40 |
| Monday Night | SW 20 - 30 |
| Tuesday Morning | WSW 40 - 60 |
| Tuesday Afternoon | WSW 55 - 75 |
| Tuesday Night | SSW 35 - 50 |
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: 3:42 PM PST Monday, January 22, 2018
Extended Weather Synopsis for Wednesday night through Wednesday
Wednesday features continued stormy weather as a stalled front sags southward as the large upper trough in the eastern Pacific continues to move east.. The frontal passage generally cuts off the easterly flow, but won't usher in much if any cooling on Wednesday until the evening hours, when a new low forming out ahead of the large trough offshore tracks toward Vancouver Island and brings a sharp cold front. Snow levels drop sharply to well below pass level by Thursday morning.
On Thursday, another upper and surface low pressure moves into our near coastal waters bring a frontal feature with it and more stormy weather with onshore moist flow through Thursday night.
On Friday, cold onshore westerly flow keeps the mountain-enhanced snow showers going as a developing low is poised to track into Western Washington Saturday.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday | Snow Level | 2500' - 3500' | 3500' - 4500' | 3000' - 4500' | |
| Wednesday Night | Snow Level | 1000' - 3000' | 1000' - 3000' | 1000' - 3000' | |
| Thursday | Snow Level | 1500' - 2500' | 1500' - 2500' | 1500' - 2500' | |
| Thursday Night | Snow Level | 1000' - 2000' | 1000' - 2000' | 1000' - 2000' | |
| Friday | Snow Level | 500' - 1500' | 500' - 1500' | 500' - 1500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday |
Snow Level 2500' - 3500' |
| Wednesday Night |
Snow Level 1000' - 3000' |
| Thursday |
Snow Level 1500' - 2500' |
| Thursday Night |
Snow Level 1000' - 2000' |
| Friday |
Snow Level 500' - 1500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday |
Snow Level 3500' - 4500' |
| Wednesday Night |
Snow Level 1000' - 3000' |
| Thursday |
Snow Level 1500' - 2500' |
| Thursday Night |
Snow Level 1000' - 2000' |
| Friday |
Snow Level 500' - 1500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday |
Snow Level 3000' - 4500' |
| Wednesday Night |
Snow Level 1000' - 3000' |
| Thursday |
Snow Level 1500' - 2500' |
| Thursday Night |
Snow Level 1000' - 2000' |
| Friday |
Snow Level 500' - 1500' |
* 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 Jan 22, 2018
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