Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Wednesday night through Tuesday
A shortwave trough plunges southeast into the region behind a cold-front passage on Wednesday. Low-density snow showers will continue to fall Wednesday night with an additional 6-8" for Mt. Hood areas; 4-6" anticipated for Paradise, Snoqualmie Pass, and White Pass; while up to two inches will fall at Baker, Stevens Pass, and Crystal Mtn. Only a dusting of snow should make it to the Cascade East Slopes. Some areas will experience locally intense snow showers and a moderate convergence band may develop overnight in the vicinity of Snoqualmie Pass.
Snow showers should decrease and generally end on Thursday as flow turns N-NWerly, giving the region a mostly sunny Thursday.
The pattern continues Thursday night as the ridge edges slightly closer and the weak fingertips of a warm front weaken offshore, spreading some high clouds over the Olympics.
On Friday, a more significant warm front approaches over the top of the ridge, bringing increasing moderate snow and slightly rising snow levels along with increasing W-SW winds.
Weather Forecast
Hurricane Ridge
| Wednesday Night | Light snow showers ending early. Becoming mostly clear after midnight. Light to moderate winds. |
| Thursday | Mostly sunny, high clouds increasing late in the day. Cool. Light winds. |
Mt. Baker
| Wednesday Night | Light snow showers. Light winds. |
| Thursday | Clearing early, becoming mostly sunny. Very light winds. |
Washington Pass and Leavenworth
| Wednesday Night | Light snow early, becoming very light. Light winds north; moderate winds south. |
| Thursday | Clearing in the morning, becoming sunny. Light winds. |
Stevens and Snoqualmie Pass
| Wednesday Night | Light snow with periods of higher intensity. Heaviest in convergence near Snoqualmie Pass. Light to moderate winds. |
| Thursday | Light snow decreasing and ending during the morning hours. Becoming mostly sunny. |
Mt. Rainier, Crystal and White Pass
| Wednesday Night | Decreasing moderate snow showers at Paradise, light to moderate snow showers at White Pass, and light snow showers at Crystal. Light to moderate winds. |
| Thursday | Very light snow showers ending early. Becoming mostly sunny. Light winds. |
Mt. Hood
| Wednesday Night | Moderate snow showers. Moderate snow with occasionally strong gusts. |
| Thursday | Light snow showers decreasing and ending around noon. Clearing during the afternoon. |
Issued: 2:49 PM PST Wednesday, December 26, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Wednesday Evening | Snow Level | 2500' | 1500' | 1000' | 1000' | 1500' | 2000' | 2000' | 2500' |
| Wednesday Night | Snow Level | 1500' | 1500' | 1000' | 1000' | 1500' | 1500' | 1000' | 2000' |
| Thursday Morning | Snow Level | 1000' | 1000' | 500' | 500' | 1000' | 1000' | 1000' | 2000' |
| Thursday Afternoon | Snow Level | 2000' | 1500' | 1000' | 1500' | 1500' | 1500' | 2000' | 2000' |
| Thursday Evening | Freezing Level | 3000' | 2000' | 1500' | 2000' | 2000' | 2000' | 2000' | 2500' |
| Thursday Night | Freezing Level | 3000' | 1000' | 1000' | 1500' | 1000' | 1500' | 1500' | 2000' |
| Friday Morning | Snow Level | 3000' | 1000' | 0' | 500' | 500' | 1000' | 1500' | 2000' |
| Friday Afternoon | Snow Level | 3500' | 1500' | 1500' | 1500' | 2500' | 2500' | 3000' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Evening |
Snow Level 2500' |
| Wednesday Night |
Snow Level 1500' |
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 2000' |
| Thursday Evening |
Freezing Level 3000' |
| Thursday Night |
Freezing Level 3000' |
| Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Evening |
Snow Level 1500' |
| Wednesday Night |
Snow Level 1500' |
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 1500' |
| Thursday Evening |
Freezing Level 2000' |
| Thursday Night |
Freezing Level 1000' |
| Friday Morning |
Snow Level 1000' |
| Friday Afternoon |
Snow Level 1500' |
| Washington Pass | Elevation |
|---|---|
| Wednesday Evening |
Snow Level 1000' |
| Wednesday Night |
Snow Level 1000' |
| Thursday Morning |
Snow Level 500' |
| Thursday Afternoon |
Snow Level 1000' |
| Thursday Evening |
Freezing Level 1500' |
| Thursday Night |
Freezing Level 1000' |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 1500' |
| Leavenworth | Elevation |
|---|---|
| Wednesday Evening |
Snow Level 1000' |
| Wednesday Night |
Snow Level 1000' |
| Thursday Morning |
Snow Level 500' |
| Thursday Afternoon |
Snow Level 1500' |
| Thursday Evening |
Freezing Level 2000' |
| Thursday Night |
Freezing Level 1500' |
| Friday Morning |
Snow Level 500' |
| Friday Afternoon |
Snow Level 1500' |
| Stevens Pass | Elevation |
|---|---|
| Wednesday Evening |
Snow Level 1500' |
| Wednesday Night |
Snow Level 1500' |
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 1500' |
| Thursday Evening |
Freezing Level 2000' |
| Thursday Night |
Freezing Level 1000' |
| Friday Morning |
Snow Level 500' |
| Friday Afternoon |
Snow Level 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Evening |
Snow Level 2000' |
| Wednesday Night |
Snow Level 1500' |
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 1500' |
| Thursday Evening |
Freezing Level 2000' |
| Thursday Night |
Freezing Level 1500' |
| Friday Morning |
Snow Level 1000' |
| Friday Afternoon |
Snow Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Wednesday Evening |
Snow Level 2000' |
| Wednesday Night |
Snow Level 1000' |
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 2000' |
| Thursday Evening |
Freezing Level 2000' |
| Thursday Night |
Freezing Level 1500' |
| Friday Morning |
Snow Level 1500' |
| Friday Afternoon |
Snow Level 3000' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Evening |
Snow Level 2500' |
| Wednesday Night |
Snow Level 2000' |
| Thursday Morning |
Snow Level 2000' |
| Thursday Afternoon |
Snow Level 2000' |
| Thursday Evening |
Freezing Level 2500' |
| Thursday Night |
Freezing Level 2000' |
| Friday Morning |
Snow Level 2000' |
| Friday Afternoon |
Snow Level 3000' |
* 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 Night | Tuesday | Tuesday Night | Tuesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | 0 | 0 | LT 0.25 |
| Mt Baker Ski Area | LT 0.25 | 0 | 0 | 0.25 |
| Washington Pass | LT 0.10 | 0 | 0 | LT 0.10 |
| Leavenworth | 0 | 0 | 0 | LT 0.10 |
| Stevens Pass | LT 0.25 | LT 0.10 | 0 | LT 0.25 |
| Snoqualmie Pass | 0.25 | LT 0.10 | 0 | LT 0.25 |
| Mission Ridge | 0 | 0 | 0 | LT 0.10 |
| Crystal Mt | LT 0.25 | LT 0.10 | 0 | LT 0.10 |
| Paradise | 0.25 - 0.50 | LT 0.10 | 0 | LT 0.25 |
| White Pass | 0.25 | 0 | 0 | LT 0.10 |
| Mt Hood Meadows | 0.50 - 0.75 | 0 | 0 | 0 |
| Timberline | 0.75 | LT 0.10 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Wednesday Night | LT 0.10 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | LT 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Wednesday Night | LT 0.25 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0.25 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Wednesday Night | LT 0.10 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Wednesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Wednesday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | LT 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Wednesday Night | 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | LT 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Wednesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Wednesday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Wednesday Night | 0.25 - 0.50 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | LT 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Wednesday Night | 0.25 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Wednesday Night | 0.50 - 0.75 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Wednesday Night | 0.75 |
| Tuesday | LT 0.10 |
| 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: 2:49 PM PST Wednesday, December 26, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Wednesday Evening | WNW 10 - 20 | WSW 5 - 15 | W 5 - 15 | W 5 - 15 | W 20 - 30 |
| Wednesday Night | NW 10 - 20 | W 5 - 15 | W 10 - 20 | W 10 - 20 | W 20 - 30 |
| Thursday Morning | NW 5 - 15 | VAR 0 - 10 | WNW 5 - 15 | WNW 5 - 15 | WNW 15 - 25 |
| Thursday Afternoon | WNW 5 - 15 | VAR 0 - 10 | W 5 - 15 | W 5 - 15 | W 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Evening | WNW 10 - 20 |
| Wednesday Night | NW 10 - 20 |
| Thursday Morning | NW 5 - 15 |
| Thursday Afternoon | WNW 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Evening | WSW 5 - 15 |
| Wednesday Night | W 5 - 15 |
| Thursday Morning | VAR 0 - 10 |
| Thursday Afternoon | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Evening | W 5 - 15 |
| Wednesday Night | W 10 - 20 |
| Thursday Morning | WNW 5 - 15 |
| Thursday Afternoon | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Wednesday Evening | W 5 - 15 |
| Wednesday Night | W 10 - 20 |
| Thursday Morning | WNW 5 - 15 |
| Thursday Afternoon | W 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Evening | W 20 - 30 |
| Wednesday Night | W 20 - 30 |
| Thursday Morning | WNW 15 - 25 |
| Thursday Afternoon | W 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Wednesday Evening | WNW 10 - 20 |
| Wednesday Night | NW 10 - 20 |
| Thursday Morning | NW 5 - 15 |
| Thursday Afternoon | WNW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Evening | WSW 5 - 15 |
| Wednesday Night | W 5 - 15 |
| Thursday Morning | VAR 0 - 10 |
| Thursday Afternoon | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Evening | W 5 - 15 |
| Wednesday Night | W 10 - 20 |
| Thursday Morning | WNW 5 - 15 |
| Thursday Afternoon | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Evening | W 5 - 15 |
| Wednesday Night | W 10 - 20 |
| Thursday Morning | WNW 5 - 15 |
| Thursday Afternoon | W 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Evening | W 20 - 30 |
| Wednesday Night | W 20 - 30 |
| Thursday Morning | WNW 15 - 25 |
| Thursday Afternoon | W 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 | |
|---|---|---|---|---|---|
| Wednesday Evening | WNW 10 - 20 | WNW 15 - 25 | WNW 25 - 35 | WNW 20 - 30 | WNW 30 - 45 |
| Wednesday Night | N 10 - 20 | N 20 - 30 | NNW 20 - 30 | NNW 30 - 45 | NNW 30 - 45 |
| Thursday Morning | NNW 10 - 20 | NNW 15 - 25 | NNW 15 - 25 | NNW 20 - 30 | NNW 25 - 35 |
| Thursday Afternoon | NW 15 - 25 | NW 15 - 25 | NW 20 - 30 | NNW 20 - 30 | NNW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Evening | WNW 10 - 20 |
| Wednesday Night | N 10 - 20 |
| Thursday Morning | NNW 10 - 20 |
| Thursday Afternoon | NW 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Wednesday Evening | WNW 15 - 25 |
| Wednesday Night | N 20 - 30 |
| Thursday Morning | NNW 15 - 25 |
| Thursday Afternoon | NW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Evening | WNW 25 - 35 |
| Wednesday Night | NNW 20 - 30 |
| Thursday Morning | NNW 15 - 25 |
| Thursday Afternoon | NW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Evening | WNW 20 - 30 |
| Wednesday Night | NNW 30 - 45 |
| Thursday Morning | NNW 20 - 30 |
| Thursday Afternoon | NNW 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Evening | WNW 30 - 45 |
| Wednesday Night | NNW 30 - 45 |
| Thursday Morning | NNW 25 - 35 |
| Thursday Afternoon | NNW 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.
Issued: 2:49 PM PST Wednesday, December 26, 2018
Extended Weather Synopsis for Tuesday night through Tuesday
The region is caught between an amplifying high pressure offshore and a deepening trough over the Rockies during the extended forecast time-frame.
Friday night or Saturday morning the warm front will cross the Cascades, bringing light to moderate rain and snow and a more significant rise in snow levels. Saturday afternoon the region should be within the warm sector of the storm with snow levels peaking and rain up to Cascade Crest level in some areas. Winds should be moderate and will increase to strong by late Saturday as a sharp cold front moves through from the north Saturday evening. Light post-frontal showers will decrease and end Sunday morning with clearing in the afternoon as flow switches to northerly.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Friday Night | Snow Level | 2500' - 3500' | 3000' - 5000' | 3500' - 5500' | * |
| Saturday | Snow Level | 4500' - 5500' | 5500' - 6500' | 6000' - 7000' | |
| Saturday Night | Snow Level | 2500' - 4500' | 3500' - 5500' | 4500' - 6000' | |
| Sunday | Snow Level | 1000' - 2000' | 1500' - 2500' | 2000' - 3000' |
| Mt. Baker | Elevation |
|---|---|
| Friday Night |
Snow Level 2500' - 3500' (Easterly Flow *) |
| Saturday |
Snow Level 4500' - 5500' |
| Saturday Night |
Snow Level 2500' - 4500' |
| Sunday |
Snow Level 1000' - 2000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Night |
Snow Level 3000' - 5000' (Easterly Flow *) |
| Saturday |
Snow Level 5500' - 6500' |
| Saturday Night |
Snow Level 3500' - 5500' |
| Sunday |
Snow Level 1500' - 2500' |
| Mt. Hood | Elevation |
|---|---|
| Friday Night |
Snow Level 3500' - 5500' (Easterly Flow *) |
| Saturday |
Snow Level 6000' - 7000' |
| Saturday Night |
Snow Level 4500' - 6000' |
| Sunday |
Snow Level 2000' - 3000' |
* 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 Dec 26, 2018
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