Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Wednesday & Wednesday
The Pacific Northwest should get one more day of relatively dry weather before a very wet/snowy weather pattern impacts the Pacific Northwest.
A stalled front offshore brings light precipitation to the Olympics on Wednesday. A secondary cold front catches up and merges with the first front by the end of the day, pushing it onshore and spreading the light rain and snow into the Mt. Hood and SW Washington Cascades. The front passes through the Cascades around midnight on Wednesday night, bringing moderate snow to most areas. We don't expect a switch to W flow behind the front to raise snow levels enough to change the precipitation to rain at Snoqualmie Pass level. Light to moderate post-frontal rain and snow showers continue on Thursday, decreasing over the Washington Cascades in the afternoon. Flow switches back easterly in the afternoon as the next system approaches from the south.
Late in the day on Thursday, a stronger warm front lifts northward and brings sharply warming temperatures along with heavy rain/snow and increasing winds to the Mt. Hood area as a subtropical moisture feed begins moving into our region.
Weather Forecast
Hurricane Ridge
| Wednesday | Cloudy with light rain and snow developing, mainly during the afternoon. Moderate to strong winds. |
Mt. Baker
| Wednesday | Cloudy with very light rain or snow possible at times. |
Washington Pass and Leavenworth
| Wednesday | Cloudy with inversion conditions. |
Stevens and Snoqualmie Pass
| Wednesday | Cloudy. Moderate E wind through the Passes. |
Mt. Rainier, Crystal and White Pass
| Wednesday | Cloudy with light rain or snow possibly arriving by evening. |
Mt. Hood
| Wednesday | Cloudy with rain and snow developing during the late afternoon. |
Issued: 11:28 AM PST Wednesday, December 18, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Wednesday Morning | Snow Level * | 4000' | 3500' | 1500' | 1000' | 2000' | 3000' | 3500' | 3000' |
| Wednesday Afternoon | Snow Level * | 4000' | 4000' | 2000' | 1500' | 2500' | 3500' | 4000' | 4000' |
| Wednesday Evening | Snow Level * | 3000' | 3000' | 1500' | 1500' | 2000' | 2500' | 3000' | 3500' |
| Wednesday Night | Snow Level * | 3000' | 2000' | 1000' | 1000' | 1500' | 1500' | 2500' | 3500' |
| Thursday Morning | Snow Level | 3000' | 2000' | 500' | 1000' | 2000' | 2000' | 3000' | 4000' |
| Thursday Afternoon | Snow Level * | 3500' | 3000' | 2500' | 2000' | 3000' | 3000' | 3500' | 4000' |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 4000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Wednesday Evening |
Snow Level 3000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 3000' (Easterly Flow *) |
| Thursday Morning |
Snow Level 3000' |
| Thursday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Wednesday Evening |
Snow Level 3000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 2000' (Easterly Flow *) |
| Thursday Morning |
Snow Level 2000' |
| Thursday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 2000' (Easterly Flow *) |
| Wednesday Evening |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Night |
Snow Level 1000' (Easterly Flow *) |
| Thursday Morning |
Snow Level 500' |
| Thursday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Evening |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Night |
Snow Level 1000' (Easterly Flow *) |
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Snow Level 2000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 2000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Wednesday Evening |
Snow Level 2000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 1500' (Easterly Flow *) |
| Thursday Morning |
Snow Level 2000' |
| Thursday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Wednesday Evening |
Snow Level 2500' (Easterly Flow *) |
| Wednesday Night |
Snow Level 1500' (Easterly Flow *) |
| Thursday Morning |
Snow Level 2000' |
| Thursday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Wednesday Evening |
Snow Level 3000' (Easterly Flow *) |
| Wednesday Night |
Snow Level 2500' (Easterly Flow *) |
| Thursday Morning |
Snow Level 3000' |
| Thursday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Wednesday Evening |
Snow Level 3500' (Easterly Flow *) |
| Wednesday Night |
Snow Level 3500' (Easterly Flow *) |
| Thursday Morning |
Snow Level 4000' |
| Thursday Afternoon |
Snow Level 4000' (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 Night | Wednesday | |
|---|---|---|---|
| 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.25 | 0.25 | LT 0.25 |
| Mt Baker Ski Area | LT 0.10 | 0.75 | 0.25 |
| Washington Pass | 0 | LT 0.25 | LT 0.10 |
| Leavenworth | 0 | LT 0.10 | LT 0.10 |
| Stevens Pass | 0 | 0.25 - 0.50 | 0.25 |
| Snoqualmie Pass | 0 | 0.75 | 0.25 |
| Mission Ridge | 0 | LT 0.25 | LT 0.25 |
| Crystal Mt | 0 | 0.25 - 0.50 | LT 0.25 |
| Paradise | 0 | 1.00 | 0.50 |
| White Pass | LT 0.10 | 0.50 | 0.25 |
| Mt Hood Meadows | LT 0.10 | 1.00 | 0.75 |
| Timberline | LT 0.10 | 1.00 | 0.75 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Wednesday | LT 0.25 |
| Wednesday Night | 0.25 |
| Wednesday | LT 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Wednesday | LT 0.10 |
| Wednesday Night | 0.75 |
| Wednesday | 0.25 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Wednesday | 0 |
| Wednesday Night | LT 0.25 |
| Wednesday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Wednesday | 0 |
| Wednesday Night | LT 0.10 |
| Wednesday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Wednesday | 0 |
| Wednesday Night | 0.25 - 0.50 |
| Wednesday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Wednesday | 0 |
| Wednesday Night | 0.75 |
| Wednesday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Wednesday | 0 |
| Wednesday Night | LT 0.25 |
| Wednesday | LT 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Wednesday | 0 |
| Wednesday Night | 0.25 - 0.50 |
| Wednesday | LT 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Wednesday | 0 |
| Wednesday Night | 1.00 |
| Wednesday | 0.50 |
| White Pass | Precipitation Forecast |
|---|---|
| Wednesday | LT 0.10 |
| Wednesday Night | 0.50 |
| Wednesday | 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Wednesday | LT 0.10 |
| Wednesday Night | 1.00 |
| Wednesday | 0.75 |
| Timberline | Precipitation Forecast |
|---|---|
| Wednesday | LT 0.10 |
| Wednesday Night | 1.00 |
| Wednesday | 0.75 |
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: 11:28 AM PST Wednesday, December 18, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Wednesday Morning | S 20 - 30 | S 15 - 25 | ESE 10 - 20 | SE 5 - 15 | SSE 5 - 15 |
| Wednesday Afternoon | S 20 - 30 | S 15 - 25 | SE 10 - 20 | SSE 5 - 15 | SSW 10 - 20 |
| Wednesday Evening | SW 10 - 20 | SSE 15 - 25 | SSE 15 - 25 | SSE 15 - 25 | SSW 20 - 30 |
| Wednesday Night | SW 15 - 25 | SSW 10 - 20 | WSW 10 - 20 | WSW 10 - 20 | WSW 15 - 25 |
| Thursday Morning | SSW 10 - 20 | S 10 - 20 | WSW 10 - 20 | WSW 10 - 20 | WSW 10 - 20 |
| Thursday Afternoon | SE 5 - 15 | S 10 - 20 | ESE 5 - 15 | SE 5 - 15 | SSW 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Morning | S 20 - 30 |
| Wednesday Afternoon | S 20 - 30 |
| Wednesday Evening | SW 10 - 20 |
| Wednesday Night | SW 15 - 25 |
| Thursday Morning | SSW 10 - 20 |
| Thursday Afternoon | SE 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning | S 15 - 25 |
| Wednesday Afternoon | S 15 - 25 |
| Wednesday Evening | SSE 15 - 25 |
| Wednesday Night | SSW 10 - 20 |
| Thursday Morning | S 10 - 20 |
| Thursday Afternoon | S 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning | ESE 10 - 20 |
| Wednesday Afternoon | SE 10 - 20 |
| Wednesday Evening | SSE 15 - 25 |
| Wednesday Night | WSW 10 - 20 |
| Thursday Morning | WSW 10 - 20 |
| Thursday Afternoon | ESE 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Wednesday Morning | SE 5 - 15 |
| Wednesday Afternoon | SSE 5 - 15 |
| Wednesday Evening | SSE 15 - 25 |
| Wednesday Night | WSW 10 - 20 |
| Thursday Morning | WSW 10 - 20 |
| Thursday Afternoon | SE 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning | SSE 5 - 15 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Evening | SSW 20 - 30 |
| Wednesday Night | WSW 15 - 25 |
| Thursday Morning | WSW 10 - 20 |
| Thursday Afternoon | SSW 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Wednesday Morning | S 20 - 30 |
| Wednesday Afternoon | S 20 - 30 |
| Wednesday Evening | SW 10 - 20 |
| Wednesday Night | SW 15 - 25 |
| Thursday Morning | SSW 10 - 20 |
| Thursday Afternoon | SE 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Morning | S 15 - 25 |
| Wednesday Afternoon | S 15 - 25 |
| Wednesday Evening | SSE 15 - 25 |
| Wednesday Night | SSW 10 - 20 |
| Thursday Morning | S 10 - 20 |
| Thursday Afternoon | S 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Morning | ESE 10 - 20 |
| Wednesday Afternoon | SE 10 - 20 |
| Wednesday Evening | SSE 15 - 25 |
| Wednesday Night | WSW 10 - 20 |
| Thursday Morning | WSW 10 - 20 |
| Thursday Afternoon | ESE 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Morning | SE 5 - 15 |
| Wednesday Afternoon | SSE 5 - 15 |
| Wednesday Evening | SSE 15 - 25 |
| Wednesday Night | WSW 10 - 20 |
| Thursday Morning | WSW 10 - 20 |
| Thursday Afternoon | SE 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Morning | SSE 5 - 15 |
| Wednesday Afternoon | SSW 10 - 20 |
| Wednesday Evening | SSW 20 - 30 |
| Wednesday Night | WSW 15 - 25 |
| Thursday Morning | WSW 10 - 20 |
| Thursday Afternoon | SSW 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 | |
|---|---|---|---|---|---|
| Wednesday Morning | SSW 30 - 40 | SSW 20 - 30 | SSW 20 - 30 | SSW 15 - 25 | SSW 20 - 30 |
| Wednesday Afternoon | S 35 - 45 | SSW 20 - 30 | SSW 20 - 30 | SSW 25 - 35 | WSW 30 - 40 |
| Wednesday Evening | WSW 30 - 40 | SW 30 - 40 | SW 40 - 55 | WSW 40 - 55 | WSW 40 - 55 |
| Wednesday Night | SW 30 - 40 | SW 30 - 40 | WSW 45 - 60 | WSW 35 - 45 | WSW 45 - 65 |
| Thursday Morning | WSW 25 - 35 | W 25 - 35 | W 25 - 35 | W 20 - 30 | WSW 30 - 40 |
| Thursday Afternoon | SSW 10 - 20 | SSW 10 - 20 | SSW 25 - 35 | SW 35 - 45 | WSW 65 - 85 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 30 - 40 |
| Wednesday Afternoon | S 35 - 45 |
| Wednesday Evening | WSW 30 - 40 |
| Wednesday Night | SW 30 - 40 |
| Thursday Morning | WSW 25 - 35 |
| Thursday Afternoon | SSW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Afternoon | SSW 20 - 30 |
| Wednesday Evening | SW 30 - 40 |
| Wednesday Night | SW 30 - 40 |
| Thursday Morning | W 25 - 35 |
| Thursday Afternoon | SSW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Afternoon | SSW 20 - 30 |
| Wednesday Evening | SW 40 - 55 |
| Wednesday Night | WSW 45 - 60 |
| Thursday Morning | W 25 - 35 |
| Thursday Afternoon | SSW 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 15 - 25 |
| Wednesday Afternoon | SSW 25 - 35 |
| Wednesday Evening | WSW 40 - 55 |
| Wednesday Night | WSW 35 - 45 |
| Thursday Morning | W 20 - 30 |
| Thursday Afternoon | SW 35 - 45 |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Afternoon | WSW 30 - 40 |
| Wednesday Evening | WSW 40 - 55 |
| Wednesday Night | WSW 45 - 65 |
| Thursday Morning | WSW 30 - 40 |
| Thursday Afternoon | WSW 65 - 85 |
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 Dec 17, 2019
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