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 night through Tuesday
A weakening frontal system approaching the region on NW flow continues to spread increasing moisture and gradual warming to the region on Tuesday afternoon. Most of the snowfall so far has fallen in the Mt. Baker area, where winds have been sustained in the 30+ mph range from 10 AM to 1 PM. The moisture should continue to spread gradually southward with rain/snow intensity peaking in the late evening hours before precipitation lets up from the Mt. Baker area southward through Wednesday morning. Temperatures should also peak with warming in the central Cascades rising snow levels to 4000 ft before they lower Snoqualmie Pass level by Wednesday. Stevens Pass should pick up 4-6" of snow with similar amounts above 4000 ft at Snoqualmie Pass. Snow levels hold steadier around 3000 ft in the Mt. Baker area where we expect an additional 6-10" of snow to fall Tuesday night. Expect subtle convergence enhancement to develop late Tuesday night in the Mountain Loop region and work southward toward Snoqualmie by sometime Wednesday morning.
Strong winds should continue at Mt. Baker through the evening hours. Elsewhere in the Cascades, winds peak Tuesday night with strong to very strong alpine winds developing in the East Central Cascades northward to Washington Pass as winds accelerate down the east slopes of the Cascades. Strong alpine winds can be expected throughout the west slopes of the Washington Cascades overnight. A ridge building in offshore with a trough developing to our east maintains a tight pressure gradient over our region on Wednesday. Winds decrease a notch during the day Wednesday as W winds shift WNW.
The offshore high nosing into our region also begins to bring a NW flow aloft. However, some lingering low-level moisture should continue to allow areas of very weak convergence very light rain and snow to linger in the Snoqualmie to Stevens Pass vicinities at times Wednesday night and Thursday. Other areas should see fair weather during this time period with light W winds and with some clouds banked against the Cascade Crests, but clear skies to the east.
Weather Forecast
Hurricane Ridge
| Tuesday Night | Cloudy with periods of light snow. |
| Wednesday | Rapidly decreasing clouds in the morning; becoming mostly sunny. |
Mt. Baker
| Tuesday Night | Moderate to heavy snow in the evening, then rapidly decreasing snowfall. |
| Wednesday | Mostly cloudy with some light snow showers in the morning. Clouds decreasing late in the day. |
Washington Pass and Leavenworth
| Tuesday Night | Light rain and snow heavier near the Cascade Crest with the precipitation shifting from the northern/central parts in the evening to the central/southern parts overnight. |
| Wednesday | Clouds and light snow showers retreating to the Cascade Crest during the morning hours. |
Stevens and Snoqualmie Pass
| Tuesday Night | Light to moderate rain and snow. Snow levels bumping up to around 4000 ft in the early morning hours. W wind through the Passes 15-25 mph. |
| Wednesday | Cloudy with light snow showers and weak convergence, mainly during the morning hours. W wind through the Passes 10-20 mph. |
Mt. Rainier, Crystal and White Pass
| Tuesday Night | Cloudy with occasional light rain and snow in the evening with steadier light rain and snow after midnight. |
| Wednesday | Mostly cloudy with scattered light snow showers in the morning hours, becoming partly cloudy in the afternoon. |
Mt. Hood
| Tuesday Night | Mostly clear with some high clouds. Clouds lowering and thickening just before dawn. Very mild with some gradual cooling. |
| Wednesday | Cloudy with light snow showers in the morning, then clearing skies during the afternoon. |
Issued: 2:38 PM PDT Tuesday, March 10, 2020
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Tuesday Evening | Snow Level | 4500' | 2500' | 3000' | 3500' | 3000' | 3500' | 4000' | 7000' |
| Tuesday Night | Snow Level | 4000' | 3000' | 3000' | 4000' | 3000' | 3500' | 3500' | 5500' |
| Wednesday Morning | Snow Level | 2000' | 2000' | 2500' | 3500' | 2500' | 2500' | 3000' | 3500' |
| Wednesday Afternoon | Freezing Level | 3000' | 3000' | 3500' | 4500' | 3500' | 3000' | 4000' | 4500' |
| Wednesday Evening | Freezing Level | 3000' | 2000' | 2500' | 3500' | 3000' | 3000' | 3500' | 4000' |
| Wednesday Night | Freezing Level | 2000' | 1500' | 1000' | 2000' | 1500' | 1500' | 2500' | 2500' |
| Thursday Morning | Freezing Level | 1500' | 500' | 500' | 1500' | 1000' | 1000' | 1000' | 1500' |
| Thursday Afternoon | Freezing Level | 2500' | 2500' | 3500' | 3500' | 3000' | 3000' | 4000' | 4000' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 2000' |
| Wednesday Afternoon |
Freezing Level 3000' |
| Wednesday Evening |
Freezing Level 3000' |
| Wednesday Night |
Freezing Level 2000' |
| Thursday Morning |
Freezing Level 1500' |
| Thursday Afternoon |
Freezing Level 2500' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Evening |
Snow Level 2500' |
| Tuesday Night |
Snow Level 3000' |
| Wednesday Morning |
Snow Level 2000' |
| Wednesday Afternoon |
Freezing Level 3000' |
| Wednesday Evening |
Freezing Level 2000' |
| Wednesday Night |
Freezing Level 1500' |
| Thursday Morning |
Freezing Level 500' |
| Thursday Afternoon |
Freezing Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Tuesday Evening |
Snow Level 3000' |
| Tuesday Night |
Snow Level 3000' |
| Wednesday Morning |
Snow Level 2500' |
| Wednesday Afternoon |
Freezing Level 3500' |
| Wednesday Evening |
Freezing Level 2500' |
| Wednesday Night |
Freezing Level 1000' |
| Thursday Morning |
Freezing Level 500' |
| Thursday Afternoon |
Freezing Level 3500' |
| Leavenworth | Elevation |
|---|---|
| Tuesday Evening |
Snow Level 3500' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Freezing Level 4500' |
| Wednesday Evening |
Freezing Level 3500' |
| Wednesday Night |
Freezing Level 2000' |
| Thursday Morning |
Freezing Level 1500' |
| Thursday Afternoon |
Freezing Level 3500' |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Evening |
Snow Level 3000' |
| Tuesday Night |
Snow Level 3000' |
| Wednesday Morning |
Snow Level 2500' |
| Wednesday Afternoon |
Freezing Level 3500' |
| Wednesday Evening |
Freezing Level 3000' |
| Wednesday Night |
Freezing Level 1500' |
| Thursday Morning |
Freezing Level 1000' |
| Thursday Afternoon |
Freezing Level 3000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Evening |
Snow Level 3500' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 2500' |
| Wednesday Afternoon |
Freezing Level 3000' |
| Wednesday Evening |
Freezing Level 3000' |
| Wednesday Night |
Freezing Level 1500' |
| Thursday Morning |
Freezing Level 1000' |
| Thursday Afternoon |
Freezing Level 3000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Evening |
Snow Level 4000' |
| Tuesday Night |
Snow Level 3500' |
| Wednesday Morning |
Snow Level 3000' |
| Wednesday Afternoon |
Freezing Level 4000' |
| Wednesday Evening |
Freezing Level 3500' |
| Wednesday Night |
Freezing Level 2500' |
| Thursday Morning |
Freezing Level 1000' |
| Thursday Afternoon |
Freezing Level 4000' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Evening |
Snow Level 7000' |
| Tuesday Night |
Snow Level 5500' |
| Wednesday Morning |
Snow Level 3500' |
| Wednesday Afternoon |
Freezing Level 4500' |
| Wednesday Evening |
Freezing Level 4000' |
| Wednesday Night |
Freezing Level 2500' |
| Thursday Morning |
Freezing Level 1500' |
| Thursday Afternoon |
Freezing Level 4000' |
* 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 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 | 0 |
| Mt Baker Ski Area | 0.50 - 0.75 | LT 0.10 | 0 | 0 |
| Washington Pass | 0.25 | 0 | 0 | 0 |
| Leavenworth | LT 0.10 | 0 | 0 | 0 |
| Stevens Pass | 0.25 - 0.50 | LT 0.10 | LT 0.10 | LT 0.10 |
| Snoqualmie Pass | 0.25 - 0.50 | LT 0.10 | LT 0.10 | LT 0.10 |
| Mission Ridge | LT 0.25 | LT 0.10 | 0 | 0 |
| Crystal Mt | LT 0.10 | LT 0.10 | 0 | 0 |
| Paradise | LT 0.25 | LT 0.10 | 0 | 0 |
| White Pass | LT 0.10 | LT 0.10 | 0 | 0 |
| Mt Hood Meadows | 0 | LT 0.10 | 0 | 0 |
| Timberline | 0 | LT 0.10 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Tuesday Night | LT 0.10 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Tuesday Night | 0.50 - 0.75 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Tuesday Night | 0.25 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Tuesday Night | LT 0.10 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Tuesday Night | 0.25 - 0.50 |
| Tuesday | LT 0.10 |
| Tuesday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Tuesday Night | 0.25 - 0.50 |
| Tuesday | LT 0.10 |
| Tuesday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Tuesday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Tuesday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| 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: 2:38 PM PDT Tuesday, March 10, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Evening | WSW 15 - 25 | SW 25 - 35 | WSW 20 - 30 | W 15 - 25 | WSW 10 - 20 |
| Tuesday Night | W 10 - 20 | WSW 15 - 25 | W 25 - 35 | W 20 - 30 | W 15 - 25 |
| Wednesday Morning | W 5 - 15 | WSW 5 - 15 | W 15 - 25 | W 10 - 20 | W 20 - 30 |
| Wednesday Afternoon | W 5 - 15 | WSW 5 - 15 | W 10 - 20 | W 5 - 15 | W 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Evening | WSW 15 - 25 |
| Tuesday Night | W 10 - 20 |
| Wednesday Morning | W 5 - 15 |
| Wednesday Afternoon | W 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Evening | SW 25 - 35 |
| Tuesday Night | WSW 15 - 25 |
| Wednesday Morning | WSW 5 - 15 |
| Wednesday Afternoon | WSW 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Evening | WSW 20 - 30 |
| Tuesday Night | W 25 - 35 |
| Wednesday Morning | W 15 - 25 |
| Wednesday Afternoon | W 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Evening | W 15 - 25 |
| Tuesday Night | W 20 - 30 |
| Wednesday Morning | W 10 - 20 |
| Wednesday Afternoon | W 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Evening | WSW 10 - 20 |
| Tuesday Night | W 15 - 25 |
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | W 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Evening | WSW 15 - 25 |
| Tuesday Night | W 10 - 20 |
| Wednesday Morning | W 5 - 15 |
| Wednesday Afternoon | W 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Evening | SW 25 - 35 |
| Tuesday Night | WSW 15 - 25 |
| Wednesday Morning | WSW 5 - 15 |
| Wednesday Afternoon | WSW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Evening | WSW 20 - 30 |
| Tuesday Night | W 25 - 35 |
| Wednesday Morning | W 15 - 25 |
| Wednesday Afternoon | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Evening | W 15 - 25 |
| Tuesday Night | W 20 - 30 |
| Wednesday Morning | W 10 - 20 |
| Wednesday Afternoon | W 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Evening | WSW 10 - 20 |
| Tuesday Night | W 15 - 25 |
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | W 15 - 25 |
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 Evening | WSW 45 - 55 | WSW 50 - 65 | W 50 - 65 | WNW 35 - 45 | W 25 - 35 |
| Tuesday Night | WSW 35 - 45 | W 45 - 65 | W 40 - 60 | W 40 - 50 | W 40 - 50 |
| Wednesday Morning | W 20 - 30 | W 30 - 40 | WNW 40 - 55 | WNW 40 - 50 | NW 35 - 45 |
| Wednesday Afternoon | W 25 - 35 | W 20 - 30 | WNW 40 - 55 | WNW 35 - 45 | NW 35 - 45 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Evening | WSW 45 - 55 |
| Tuesday Night | WSW 35 - 45 |
| Wednesday Morning | W 20 - 30 |
| Wednesday Afternoon | W 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Evening | WSW 50 - 65 |
| Tuesday Night | W 45 - 65 |
| Wednesday Morning | W 30 - 40 |
| Wednesday Afternoon | W 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Evening | W 50 - 65 |
| Tuesday Night | W 40 - 60 |
| Wednesday Morning | WNW 40 - 55 |
| Wednesday Afternoon | WNW 40 - 55 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Evening | WNW 35 - 45 |
| Tuesday Night | W 40 - 50 |
| Wednesday Morning | WNW 40 - 50 |
| Wednesday Afternoon | WNW 35 - 45 |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Evening | W 25 - 35 |
| Tuesday Night | W 40 - 50 |
| Wednesday Morning | NW 35 - 45 |
| Wednesday Afternoon | NW 35 - 45 |
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: 2:38 PM PDT Tuesday, March 10, 2020
Extended Weather Synopsis for Tuesday night through Tuesday
A sharp trough drops south down the coast of British Columbia Thursday night bringing sharp cooling Friday morning as a surface low forms offshore and pushes moderate to heavy snow into the Olympics, southern and central Washington Cascades, and Mt. Hood on Friday morning with unstable showers continuing through Saturday. Areas of northern Washington Stand to get the least out of this system, but areas further south may pick up 10-20" of snow before all is said and done. Snow levels should be below normal throughout the extended forecast and at time approach sea level.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Thursday Night | Freezing Level | 1000' - 2000' | 2000' - 3000' | 3000' - 4500' | |
| Friday | Snow Level | 0' - 2000' | 1000' - 2000' | 2000' - 3500' | |
| Friday Night | Snow Level | 0' - 2000' | 1000' - 2500' | 1000' - 2000' | |
| Saturday | Snow Level | 0' - 1000' | 0' - 1000' | 0' - 1000' |
| Mt. Baker | Elevation |
|---|---|
| Thursday Night |
Freezing Level 1000' - 2000' |
| Friday |
Snow Level 0' - 2000' |
| Friday Night |
Snow Level 0' - 2000' |
| Saturday |
Snow Level 0' - 1000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Night |
Freezing Level 2000' - 3000' |
| Friday |
Snow Level 1000' - 2000' |
| Friday Night |
Snow Level 1000' - 2500' |
| Saturday |
Snow Level 0' - 1000' |
| Mt. Hood | Elevation |
|---|---|
| Thursday Night |
Freezing Level 3000' - 4500' |
| Friday |
Snow Level 2000' - 3500' |
| Friday Night |
Snow Level 1000' - 2000' |
| Saturday |
Snow Level 0' - 1000' |
* 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 Mar 10, 2020
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