Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Friday & Saturday
A strong jetstream sits over northern Oregon on Friday with a weak trough over the Pacific Northwest that continues to bring unstable air on westerly flow into the Pacific Northwest. Temperatures are seasonable temperatures for mid-December. Rain and snow activity may be locally intense, but the brunt of the major storm system that began on Wednesday has finished. The remaining activity should focus on the west slopes of the Washington Cascades which should receive variable amounts of precipitation, but generally less than 0.5" of water equivalent. Snow levels should remain around Snoqualmie Pass level throughout the day.
Models show a subtle shortwave feature associated with some deeper convection, which looks to be on track to arrive on Friday evening. Rain and snow should increase during the evening hours, particularly for the central Washington Cascades; some models indicating light snow reaching onto the east slopes of the Cascades. The heaviest snow is likely to be in convergence which may develop. The feature may shift winds slightly more southwesterly late Friday afternoon, before switching back westerly during the evening hours.
Saturday looks to be generally fair weather with very light snow showers tapering off.
Weather Forecast
Hurricane Ridge
| Friday | Light rain and snow showers. |
Mt. Baker
| Friday | Light to moderate rain and snow showers. |
Washington Pass and Leavenworth
| Friday | Mostly cloudy with a chance of a light rain or snow shower, with a greater likelihood in the Leavenworth region than further north. |
Stevens and Snoqualmie Pass
| Friday | Decreasing light snow showers (mixed with rain at and below Snoqualmie Pass level) and locally intense. Light W wind through the Passes. |
Mt. Rainier, Crystal and White Pass
| Friday | Decreasing rain and snow becoming showery by late morning. Accumulations should be moderate at Paradise and light for White Pass and Crystal. |
Mt. Hood
| Friday | Cloudy with decreasing light snow showers. |
Issued: 7:01 AM PST Friday, December 13, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Morning | Snow Level | 2500' | 2500' | 2000' | 2000' | 2500' | 3000' | 3000' | 3500' |
| Friday Afternoon | Snow Level | 3000' | 2500' | 2500' | 3000' | 3000' | 3000' | 3000' | 3500' |
| Friday Evening | Snow Level | 2500' | 2500' | 2000' | 2500' | 2500' | 2500' | 2500' | 3000' |
| Friday Night | Snow Level | 2500' | 1500' | 1500' | 1500' | 2000' | 2000' | 2000' | 2500' |
| Saturday Morning | Snow Level | 2000' | 1500' | 1000' | 1000' | 1500' | 2000' | 1500' | 2000' |
| Saturday Afternoon | Snow Level | 2500' | 2000' | 2000' | 2500' | 2000' | 2000' | 2500' | 2500' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Morning |
Snow Level 2500' |
| Friday Afternoon |
Snow Level 3000' |
| Friday Evening |
Snow Level 2500' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon |
Snow Level 2500' |
| Mt. Baker | Elevation |
|---|---|
| Friday Morning |
Snow Level 2500' |
| Friday Afternoon |
Snow Level 2500' |
| Friday Evening |
Snow Level 2500' |
| Friday Night |
Snow Level 1500' |
| Saturday Morning |
Snow Level 1500' |
| Saturday Afternoon |
Snow Level 2000' |
| Washington Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level 2000' |
| Friday Afternoon |
Snow Level 2500' |
| Friday Evening |
Snow Level 2000' |
| Friday Night |
Snow Level 1500' |
| Saturday Morning |
Snow Level 1000' |
| Saturday Afternoon |
Snow Level 2000' |
| Leavenworth | Elevation |
|---|---|
| Friday Morning |
Snow Level 2000' |
| Friday Afternoon |
Snow Level 3000' |
| Friday Evening |
Snow Level 2500' |
| Friday Night |
Snow Level 1500' |
| Saturday Morning |
Snow Level 1000' |
| Saturday Afternoon |
Snow Level 2500' |
| Stevens Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level 2500' |
| Friday Afternoon |
Snow Level 3000' |
| Friday Evening |
Snow Level 2500' |
| Friday Night |
Snow Level 2000' |
| Saturday Morning |
Snow Level 1500' |
| Saturday Afternoon |
Snow Level 2000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3000' |
| Friday Evening |
Snow Level 2500' |
| Friday Night |
Snow Level 2000' |
| Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon |
Snow Level 2000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3000' |
| Friday Evening |
Snow Level 2500' |
| Friday Night |
Snow Level 2000' |
| Saturday Morning |
Snow Level 1500' |
| Saturday Afternoon |
Snow Level 2500' |
| Mt. Hood | Elevation |
|---|---|
| Friday Morning |
Snow Level 3500' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Evening |
Snow Level 3000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2000' |
| Saturday Afternoon |
Snow Level 2500' |
* 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
| Friday | Friday Night | Saturday | |
|---|---|---|---|
| 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.25 | LT 0.10 | 0 |
| Mt Baker Ski Area | 0.25 | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | 0 | 0 |
| Leavenworth | 0 | LT 0.25 | 0 |
| Stevens Pass | 0.25 | 0.25 | LT 0.10 |
| Snoqualmie Pass | LT 0.25 | 0.25 - 0.50 | LT 0.10 |
| Mission Ridge | 0 | LT 0.25 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 | 0 |
| Paradise | 0.25 - 0.50 | 0.25 - 0.50 | LT 0.10 |
| White Pass | 0.25 | 0.25 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | LT 0.25 | LT 0.10 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday | LT 0.25 |
| Friday Night | LT 0.10 |
| Saturday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday | 0.25 |
| Friday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday | LT 0.10 |
| Friday Night | 0 |
| Saturday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday | 0 |
| Friday Night | LT 0.25 |
| Saturday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday | 0.25 |
| Friday Night | 0.25 |
| Saturday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday | LT 0.25 |
| Friday Night | 0.25 - 0.50 |
| Saturday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday | 0 |
| Friday Night | LT 0.25 |
| Saturday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday | LT 0.10 |
| Friday Night | LT 0.10 |
| Saturday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday | 0.25 - 0.50 |
| Friday Night | 0.25 - 0.50 |
| Saturday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday | 0.25 |
| Friday Night | 0.25 |
| Saturday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday | LT 0.10 |
| Friday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday | LT 0.10 |
| Friday Night | LT 0.25 |
| Saturday | LT 0.10 |
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: 7:01 AM PST Friday, December 13, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Morning | WSW 0 - 10 | WSW 5 - 15 | W 5 - 15 | WSW 5 - 15 | W 10 - 20 |
| Friday Afternoon | WSW 0 - 10 | WSW 0 - 10 | W 5 - 15 | WSW 5 - 15 | W 5 - 15 |
| Friday Evening | W 0 - 10 | WSW 0 - 10 | W 0 - 10 | WSW 0 - 10 | W 5 - 15 |
| Friday Night | W 0 - 10 | W 0 - 10 | W 5 - 15 | W 0 - 10 | W 5 - 15 |
| Saturday Morning | W 0 - 10 | W 0 - 10 | W 0 - 10 | W 0 - 10 | W 5 - 15 |
| Saturday Afternoon | W 0 - 10 | W 0 - 10 | W 0 - 10 | W 0 - 10 | W 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Morning | WSW 0 - 10 |
| Friday Afternoon | WSW 0 - 10 |
| Friday Evening | W 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Friday Morning | WSW 5 - 15 |
| Friday Afternoon | WSW 0 - 10 |
| Friday Evening | WSW 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Morning | W 5 - 15 |
| Friday Afternoon | W 5 - 15 |
| Friday Evening | W 0 - 10 |
| Friday Night | W 5 - 15 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Morning | WSW 5 - 15 |
| Friday Afternoon | WSW 5 - 15 |
| Friday Evening | WSW 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Friday Morning | W 10 - 20 |
| Friday Afternoon | W 5 - 15 |
| Friday Evening | W 5 - 15 |
| Friday Night | W 5 - 15 |
| Saturday Morning | W 5 - 15 |
| Saturday Afternoon | W 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Morning | WSW 0 - 10 |
| Friday Afternoon | WSW 0 - 10 |
| Friday Evening | W 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Morning | WSW 5 - 15 |
| Friday Afternoon | WSW 0 - 10 |
| Friday Evening | WSW 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Morning | W 5 - 15 |
| Friday Afternoon | W 5 - 15 |
| Friday Evening | W 0 - 10 |
| Friday Night | W 5 - 15 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Morning | WSW 5 - 15 |
| Friday Afternoon | WSW 5 - 15 |
| Friday Evening | WSW 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | W 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Morning | W 10 - 20 |
| Friday Afternoon | W 5 - 15 |
| Friday Evening | W 5 - 15 |
| Friday Night | W 5 - 15 |
| Saturday Morning | W 5 - 15 |
| Saturday Afternoon | W 5 - 15 |
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 | |
|---|---|---|---|---|---|
| Friday Morning | W 15 - 25 | W 20 - 30 | W 25 - 35 | W 20 - 30 | W 25 - 35 |
| Friday Afternoon | W 10 - 20 | W 10 - 20 | WNW 15 - 25 | WNW 15 - 25 | WNW 15 - 25 |
| Friday Evening | WNW 5 - 15 | W 0 - 10 | WNW 15 - 25 | WNW 10 - 20 | WNW 10 - 20 |
| Friday Night | W 10 - 20 | W 10 - 20 | WNW 20 - 30 | W 20 - 30 | W 20 - 30 |
| Saturday Morning | W 10 - 20 | WNW 10 - 20 | WNW 15 - 25 | WNW 15 - 25 | WNW 20 - 30 |
| Saturday Afternoon | W 5 - 15 | WNW 5 - 15 | W 10 - 20 | W 15 - 25 | WNW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Morning | W 15 - 25 |
| Friday Afternoon | W 10 - 20 |
| Friday Evening | WNW 5 - 15 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Morning | W 20 - 30 |
| Friday Afternoon | W 10 - 20 |
| Friday Evening | W 0 - 10 |
| Friday Night | W 10 - 20 |
| Saturday Morning | WNW 10 - 20 |
| Saturday Afternoon | WNW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Morning | W 25 - 35 |
| Friday Afternoon | WNW 15 - 25 |
| Friday Evening | WNW 15 - 25 |
| Friday Night | WNW 20 - 30 |
| Saturday Morning | WNW 15 - 25 |
| Saturday Afternoon | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Morning | W 20 - 30 |
| Friday Afternoon | WNW 15 - 25 |
| Friday Evening | WNW 10 - 20 |
| Friday Night | W 20 - 30 |
| Saturday Morning | WNW 15 - 25 |
| Saturday Afternoon | W 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Morning | W 25 - 35 |
| Friday Afternoon | WNW 15 - 25 |
| Friday Evening | WNW 10 - 20 |
| Friday Night | W 20 - 30 |
| Saturday Morning | WNW 20 - 30 |
| Saturday Afternoon | WNW 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Dec 12, 2019
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