Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Thursday & Tuesday
Afternoon update: Day 1 precipitation forecasts adjusted
The Gore-Tex weather has come to an end as the remnants of the atmospheric river in the form of a weakening N-S oriented frontal boundary pushed through the Cascades late this morning. The heftiest 24 hr water totals through 4 am Thursday included 4.5 inches in the Mt. Baker area and around 3 inches at Crystal/Paradise. Areas of freezing rain seen this morning along the lower slopes of the Cascade Passes and along the east slopes of the Cascades ended after the front pushed through and milder air mixed down. Light to moderate showers in the Mt. Hood area have become invigorated by a shortwave rotating up in SW flow.
Shower activity should wane overnight with partial clearing expected on Friday for the Olympics and Washington Cascades. Snow levels will rise slightly with daytime heating Friday afternoon. A longwave trough will dig along the West Coast Friday night, sending increasing clouds and showers into the area from the south overnight.
Weather Forecast
Olympics
| Thursday - Thursday Evening |
Light rain and snow showers becoming light to occasionally moderate later in the afternoon. Slow cooling trend. |
| Thursday Night - Friday Morning |
Mostly cloudy with scattered light rain and snow showers. |
| Friday Afternoon - Friday Evening |
Partly cloudy with isolated light rain and snow showers. |
| Friday Night |
Increasing clouds overnight with light rain and snow showers spreading up from the south. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Thursday Afternoon - Thursday Evening |
Light rain and snow showers becoming light to moderate later in the afternoon. Slow cooling trend. |
| Thursday Night - Friday Morning |
Mostly cloudy with scattered light rain and snow showers. |
| Friday Afternoon - Friday Evening |
Isolated light rain and snow showers. Partly cloudy central and north Cascades, mostly cloudy south Cascades with increasing high clouds. |
| Friday Night |
Increasing clouds overnight with light rain and snow showers spreading up from the south. |
East slopes of the Washington Cascades
| Thursday Afternoon - Thursday Evening |
Mostly cloudy with light to occasionally moderate rain and snow showers. Slow cooling trend. |
| Thursday Night - Friday Morning |
Mostly cloudy with scattered light rain and snow showers. |
| Friday Afternoon - Friday Evening |
Isolated light rain and snow showers. Partly cloudy central-east and northeast Cascades, mostly cloudy south Cascades with increasing high clouds. |
| Friday Night |
Increasing clouds overnight with light rain and snow showers spreading up from the south. |
Mt. Hood Area
| Thursday Afternoon - Thursday Evening |
Light to moderate rain and snow. Slow cooling trend. |
| Thursday Night - Friday Morning |
Mostly cloudy with scattered light rain and snow showers. |
| Friday Afternoon - Friday Evening |
Cloudy with isolated light rain and snow showers. |
| Friday Night |
Cloudy with light to occasionally moderate rain and snow showers. |
Issued: 2:55 PM PST Thursday, February 16, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Thursday Afternoon | Snow Level | 4000' | 4000' | 4500' | ' | ' | 4000' | ' | 4500' |
| Thursday Night - Friday Morning | Snow Level | 3000' | 3000' | 3000' | ' | ' | 3000' | ' | 3500' |
| Friday Afternoon | Snow Level | 3500' | 3500' | 3500' | ' | ' | 3500' | ' | 4000' |
| Friday Night | Snow Level | 2500' | 2000' | 2500' | ' | ' | 2500' | ' | 3000' |
| Thursday Mid-day | Snow Level | 4500' | 4500' | 5500' | ' | ' | 4500' | ' | 5500' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Afternoon |
Snow Level 4000' |
| Thursday Night - Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Night |
Snow Level 2500' |
| Thursday Mid-day |
Snow Level 4500' |
| Mt. Baker | Elevation |
|---|---|
| Thursday Afternoon |
Snow Level 4000' |
| Thursday Night - Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Night |
Snow Level 2000' |
| Thursday Mid-day |
Snow Level 4500' |
| Washington Pass | Elevation |
|---|---|
| Thursday Afternoon |
Snow Level 4500' |
| Thursday Night - Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Night |
Snow Level 2500' |
| Thursday Mid-day |
Snow Level 5500' |
| Leavenworth | Elevation |
|---|---|
| Thursday Afternoon |
Snow Level ' |
| Thursday Night - Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' |
| Thursday Mid-day |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Thursday Afternoon |
Snow Level ' |
| Thursday Night - Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' |
| Thursday Mid-day |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Afternoon |
Snow Level 4000' |
| Thursday Night - Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Night |
Snow Level 2500' |
| Thursday Mid-day |
Snow Level 4500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Afternoon |
Snow Level ' |
| Thursday Night - Friday Morning |
Snow Level ' |
| Friday Afternoon |
Snow Level ' |
| Friday Night |
Snow Level ' |
| Thursday Mid-day |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Thursday Afternoon |
Snow Level 4500' |
| Thursday Night - Friday Morning |
Snow Level 3500' |
| Friday Afternoon |
Snow Level 4000' |
| Friday Night |
Snow Level 3000' |
| Thursday Mid-day |
Snow Level 5500' |
* 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 | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | LT 0.10 |
| Mt Baker Ski Area | 0 - 1.00 | LT 0.25 |
| Washington Pass | 0.25 - 0.50 | LT 0.10 |
| Stevens Pass | 0.50 - 0.75 | LT 0.10 |
| Snoqualmie Pass | 0.75 - 1.00 | LT 0.10 |
| Mission Ridge | LT 0.25 | LT 0.10 |
| Crystal Mt | 0 - 0.50 | LT 0.10 |
| Paradise | 0 - 1.00 | LT 0.25 |
| White Pass | 0.50 - 0.75 | LT 0.10 |
| Mt Hood Meadows | 1.00 - 1.50 | LT 0.25 |
| Timberline | 0 - 1.50 | LT 0.25 |
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: 2:55 PM PST Thursday, February 16, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Afternoon | WSW 15 - 25 | WSW 15 - 25 | WSW 15 - 25 | --- - | SW 20 - 30 |
| Thursday Night - Friday Morning | SW 10 - 20 | SW 5 - 15 | SW 10 - 20 | --- - | SW 5 - 15 |
| Friday Afternoon - Friday Night | E 0 - 10 | E 0 - 10 | E 5 - 15 | --- - | E 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Afternoon | WSW 15 - 25 |
| Thursday Night - Friday Morning | SW 10 - 20 |
| Friday Afternoon - Friday Night | E 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Thursday Afternoon | WSW 15 - 25 |
| Thursday Night - Friday Morning | SW 5 - 15 |
| Friday Afternoon - Friday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday Afternoon | WSW 15 - 25 |
| Thursday Night - Friday Morning | SW 10 - 20 |
| Friday Afternoon - Friday Night | E 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday Afternoon | --- - |
| Thursday Night - Friday Morning | --- - |
| Friday Afternoon - Friday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Thursday Afternoon | SW 20 - 30 |
| Thursday Night - Friday Morning | SW 5 - 15 |
| Friday Afternoon - Friday Night | E 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday Afternoon | WSW 15 - 25 |
| Thursday Night - Friday Morning | SW 10 - 20 |
| Friday Afternoon - Friday Night | E 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Afternoon | WSW 15 - 25 |
| Thursday Night - Friday Morning | SW 5 - 15 |
| Friday Afternoon - Friday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Afternoon | WSW 15 - 25 |
| Thursday Night - Friday Morning | SW 10 - 20 |
| Friday Afternoon - Friday Night | E 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Afternoon | --- - |
| Thursday Night - Friday Morning | --- - |
| Friday Afternoon - Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Afternoon | SW 20 - 30 |
| Thursday Night - Friday Morning | SW 5 - 15 |
| Friday Afternoon - Friday Night | E 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 | |
|---|---|---|---|---|---|
| Thursday Afternoon | WSW 15 - 25 | WSW 20 - 30 | WSW 20 - 30 | --- - | WSW 40 - 50 |
| Thursday Night - Friday Morning | SW 10 - 20 | WSW 15 - 25 | WSW 20 - 30 | --- - | SW 20 - 30 |
| Friday Afternoon - Friday Night | S 5 - 15 | SE 5 - 15 | SE 15 - 25 | --- - | SE 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Afternoon | WSW 15 - 25 |
| Thursday Night - Friday Morning | SW 10 - 20 |
| Friday Afternoon - Friday Night | S 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday Afternoon | WSW 20 - 30 |
| Thursday Night - Friday Morning | WSW 15 - 25 |
| Friday Afternoon - Friday Night | SE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Afternoon | WSW 20 - 30 |
| Thursday Night - Friday Morning | WSW 20 - 30 |
| Friday Afternoon - Friday Night | SE 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Afternoon | --- - |
| Thursday Night - Friday Morning | --- - |
| Friday Afternoon - Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Afternoon | WSW 40 - 50 |
| Thursday Night - Friday Morning | SW 20 - 30 |
| Friday Afternoon - Friday Night | SE 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: 2:55 PM PST Thursday, February 16, 2017
Extended Weather Synopsis for Tuesday night through Tuesday
Showers that began to rotate up from the south Friday night should spread over the area during the day Saturday. The longwave trough located offshore and associated with the shower activity will swing through in the afternoon with showers tapering off Saturday night. A weak Pacific frontal band should pass over the area Sunday with generally light amounts of precipitation expected. A stronger system should impact the area on Monday although the details are murky.
Extended Weather
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
Cloudy with light to occasionally moderate showers.
Mostly cloudy with scattered light rain and snow showers tapering off.
Light rain and snow developing over the Olympics and spreading inland during the day.
Moderate rain and snow developing Sunday night and potentially becoming stormy on Monday.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Saturday Morning | Snow Level | 2000' - 3000' | 2500' - 3500' | 3000' - 4000' | |
| Saturday Afternoon | Snow Level | 3000' - 4000' | 3500' - 4500' | 4000' - 5000' | |
| Saturday Night - Sunday Morning | Snow Level | 2500' - 3500' | 2500' - 3500' | 3000' - 4000' | |
| Sunday Afternoon - Monday | Snow Level | 3000' - 4000' | 3000' - 4000' | 3500' - 4500' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Morning |
Snow Level 2000' - 3000' |
| Saturday Afternoon |
Snow Level 3000' - 4000' |
| Saturday Night - Sunday Morning |
Snow Level 2500' - 3500' |
| Sunday Afternoon - Monday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Morning |
Snow Level 2500' - 3500' |
| Saturday Afternoon |
Snow Level 3500' - 4500' |
| Saturday Night - Sunday Morning |
Snow Level 2500' - 3500' |
| Sunday Afternoon - Monday |
Snow Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Morning |
Snow Level 3000' - 4000' |
| Saturday Afternoon |
Snow Level 4000' - 5000' |
| Saturday Night - Sunday Morning |
Snow Level 3000' - 4000' |
| Sunday Afternoon - Monday |
Snow Level 3500' - 4500' |
* 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 Feb 16, 2017
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