Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Friday night through Thursday
A stalled low pressure system off the California coast will push a north-south oriented frontal band inland tonight. Light precipitation will reach all areas as the frontal boundary weakens as it moves through the Cascades. A shortwave approaching the area in the northern branch of the jet stream will reach the area on Saturday and keep showers in the forecast even as the initial frontal boundary washes out. Snow levels will lower slightly with the frontal passage but there won't be a significant cool down. Light easterly flow will help drag snow levels down to around 4000' for the Cascade Passes through early tomorrow morning, but easterly flow will ease during the day and snow levels will settle around 4500'.
The flow aloft will veer to the NW Saturday night and Sunday. Leftover showers will diminish, but a high amplitude ridge building offshore will trap low level moisture along the west slopes of the Cascades, Olympics and Mt. Hood on Sunday and perhaps squeeze out a few areas of drizzle. The east slopes of the Cascades will likely have a sunnier day to end the weekend.
Weather Forecast
Hurricane Ridge
| Friday Night | Cloudy with light rain and snow. |
| Saturday | Scattered light rain and snow showers. |
Mt. Baker
| Friday Night | Cloudy. Light rain and snow developing this evening. |
| Saturday | Light to occasionally moderate rain and snow showers. |
Washington Pass and Leavenworth
| Friday Night | Cloudy. Light rain and snow developing after midnight. |
| Saturday | Scattered light rain and snow showers. |
Stevens and Snoqualmie Pass
| Friday Night | Cloudy. Light rain and snow developing in the evening. Light to moderate east winds in the Passes. |
| Saturday | Light to occasionally moderate rain and snow showers. Light to moderate east winds in the Passes becoming west winds in the afternoon. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Cloudy. Light rain and snow developing in the evening. |
| Saturday | Light rain and snow showers. |
Mt. Hood
| Friday Night | Cloudy. Light to occasionally moderate rain and snow developing in the evening. |
| Saturday | Light to occasionally moderate rain and snow showers. |
Issued: 2:40 PM PST Friday, December 6, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Evening | Snow Level * | 5500' | 5500' | 4000' | 4000' | 4000' | 4000' | 5500' | 6500' |
| Friday Night | Snow Level * | 5500' | 5000' | 4000' | 4000' | 4000' | 4000' | 5500' | 6500' |
| Saturday Morning | Snow Level * | 5000' | 4500' | 4000' | 4000' | 4500' | 5000' | 5000' | 6000' |
| Saturday Afternoon | Snow Level | 5000' | 4500' | 4500' | 4500' | 4500' | 5000' | 5000' | 5500' |
| Saturday Evening | Snow Level | 4500' | 4500' | 4500' | 4500' | 4500' | 4500' | 4500' | 5500' |
| Saturday Night | Snow Level | 4500' | 4500' | 4000' | 4500' | 4500' | 4500' | 4500' | 5500' |
| Sunday Morning | Snow Level | 4500' | 4000' | 4000' | 4000' | 4500' | 4500' | 5000' | 5000' |
| Sunday Afternoon | Freezing Level | 5000' | 4000' | 4500' | 4500' | 5000' | 5000' | 5500' | 6000' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Snow Level 5500' (Easterly Flow *) |
| Friday Night |
Snow Level 5500' (Easterly Flow *) |
| Saturday Morning |
Snow Level 5000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Evening |
Snow Level 4500' |
| Saturday Night |
Snow Level 4500' |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Freezing Level 5000' |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Snow Level 5500' (Easterly Flow *) |
| Friday Night |
Snow Level 5000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 4500' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4500' |
| Saturday Night |
Snow Level 4500' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Freezing Level 4000' |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' (Easterly Flow *) |
| Friday Night |
Snow Level 4000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 4000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4500' |
| Saturday Night |
Snow Level 4000' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Freezing Level 4500' |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' (Easterly Flow *) |
| Friday Night |
Snow Level 4000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 4000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4500' |
| Saturday Night |
Snow Level 4500' |
| Sunday Morning |
Snow Level 4000' |
| Sunday Afternoon |
Freezing Level 4500' |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' (Easterly Flow *) |
| Friday Night |
Snow Level 4000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 4500' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4500' |
| Saturday Night |
Snow Level 4500' |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Freezing Level 5000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' (Easterly Flow *) |
| Friday Night |
Snow Level 4000' (Easterly Flow *) |
| Saturday Morning |
Snow Level 5000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Evening |
Snow Level 4500' |
| Saturday Night |
Snow Level 4500' |
| Sunday Morning |
Snow Level 4500' |
| Sunday Afternoon |
Freezing Level 5000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Snow Level 5500' (Easterly Flow *) |
| Friday Night |
Snow Level 5500' (Easterly Flow *) |
| Saturday Morning |
Snow Level 5000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Evening |
Snow Level 4500' |
| Saturday Night |
Snow Level 4500' |
| Sunday Morning |
Snow Level 5000' |
| Sunday Afternoon |
Freezing Level 5500' |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Snow Level 6500' (Easterly Flow *) |
| Friday Night |
Snow Level 6500' (Easterly Flow *) |
| Saturday Morning |
Snow Level 6000' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 5500' |
| Saturday Evening |
Snow Level 5500' |
| Saturday Night |
Snow Level 5500' |
| Sunday Morning |
Snow Level 5000' |
| Sunday Afternoon |
Freezing Level 6000' |
* 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 Night | Thursday | Thursday Night | Thursday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.25 | LT 0.25 | 0 | 0 |
| Mt Baker Ski Area | 0.25 | 0.25 - 0.50 | LT 0.10 | 0 |
| Washington Pass | LT 0.10 | LT 0.25 | LT 0.10 | 0 |
| Leavenworth | LT 0.10 | LT 0.10 | 0 | 0 |
| Stevens Pass | LT 0.25 | 0.25 | LT 0.10 | LT 0.10 |
| Snoqualmie Pass | LT 0.25 | 0.25 - 0.50 | LT 0.10 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 | 0 | 0 |
| Crystal Mt | LT 0.25 | LT 0.25 | 0 | 0 |
| Paradise | 0.25 | LT 0.25 | LT 0.10 | LT 0.10 |
| White Pass | LT 0.25 | LT 0.25 | LT 0.10 | 0 |
| Mt Hood Meadows | 0.25 | 0.25 - 0.50 | LT 0.10 | 0 |
| Timberline | 0.25 - 0.50 | 0.50 | LT 0.25 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Thursday | LT 0.25 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | 0.25 |
| Thursday | 0.25 - 0.50 |
| Thursday Night | LT 0.10 |
| Thursday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Thursday | LT 0.25 |
| Thursday Night | LT 0.10 |
| Thursday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Thursday | 0.25 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Thursday | 0.25 - 0.50 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Thursday Night | 0 |
| Thursday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Thursday | LT 0.25 |
| Thursday Night | 0 |
| Thursday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | 0.25 |
| Thursday | LT 0.25 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Thursday | LT 0.25 |
| Thursday Night | LT 0.10 |
| Thursday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | 0.25 |
| Thursday | 0.25 - 0.50 |
| Thursday Night | LT 0.10 |
| Thursday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | 0.25 - 0.50 |
| Thursday | 0.50 |
| Thursday Night | LT 0.25 |
| Thursday | 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: 2:40 PM PST Friday, December 6, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | SW 10 - 20 | SW 20 - 30 | SE 15 - 25 | S 10 - 20 | S 15 - 25 |
| Friday Night | SW 10 - 20 | SW 5 - 15 | SE 10 - 20 | S 10 - 20 | SW 10 - 20 |
| Saturday Morning | SW 5 - 15 | SW 10 - 20 | SE 10 - 20 | SW 5 - 15 | SW 15 - 25 |
| Saturday Afternoon | WNW 5 - 15 | W 5 - 15 | W 5 - 15 | W 5 - 15 | W 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | WNW 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | SW 20 - 30 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | SW 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | SE 15 - 25 |
| Friday Night | SE 10 - 20 |
| Saturday Morning | SE 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | S 10 - 20 |
| Friday Night | S 10 - 20 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | W 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | S 15 - 25 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 15 - 25 |
| Saturday Afternoon | W 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | WNW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SW 20 - 30 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | SW 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | SE 15 - 25 |
| Friday Night | SE 10 - 20 |
| Saturday Morning | SE 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | S 10 - 20 |
| Friday Night | S 10 - 20 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | W 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | S 15 - 25 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 15 - 25 |
| Saturday 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 | |
|---|---|---|---|---|---|
| Friday Evening | SW 20 - 30 | SW 20 - 30 | SW 10 - 20 | SW 10 - 20 | SW 20 - 30 |
| Friday Night | SW 10 - 20 | SW 10 - 20 | SW 10 - 20 | SW 20 - 30 | SW 20 - 30 |
| Saturday Morning | SW 10 - 20 | SW 10 - 20 | SW 15 - 25 | SW 15 - 25 | SW 20 - 30 |
| Saturday Afternoon | W 5 - 15 | W 5 - 15 | W 10 - 20 | NW 10 - 20 | W 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SW 20 - 30 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | SW 20 - 30 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 10 - 20 |
| Saturday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 15 - 25 |
| Saturday Afternoon | W 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 20 - 30 |
| Saturday Morning | SW 15 - 25 |
| Saturday Afternoon | NW 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | SW 20 - 30 |
| Friday Night | SW 20 - 30 |
| Saturday Morning | SW 20 - 30 |
| Saturday 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.
Issued: 2:40 PM PST Friday, December 6, 2019
Extended Weather Synopsis for Thursday night through Thursday
Upper level ridging will move over the area Sunday night and Monday leading to drier and milder conditions. Freezing levels should rise into the 7000-9000 ft range later Monday afternoon. The benign weather should last through much of Tuesday as a weak Pacific frontal system approaches the PNW coast-line late Tuesday afternoon.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Freezing Level | 3000' - 4000' | 3500' - 4500' | 4500' - 5500' | |
| Monday | Freezing Level | 6000' - 7000' | 6500' - 7500' | 7500' - 8500' | |
| Monday Night | Freezing Level | 6000' - 7000' | 6500' - 7500' | 7500' - 8500' | |
| Tuesday | Freezing Level | 4000' - 5000' | 4500' - 5500' | 6000' - 7000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Freezing Level 3000' - 4000' |
| Monday |
Freezing Level 6000' - 7000' |
| Monday Night |
Freezing Level 6000' - 7000' |
| Tuesday |
Freezing Level 4000' - 5000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Freezing Level 3500' - 4500' |
| Monday |
Freezing Level 6500' - 7500' |
| Monday Night |
Freezing Level 6500' - 7500' |
| Tuesday |
Freezing Level 4500' - 5500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Freezing Level 4500' - 5500' |
| Monday |
Freezing Level 7500' - 8500' |
| Monday Night |
Freezing Level 7500' - 8500' |
| Tuesday |
Freezing Level 6000' - 7000' |
* 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 5, 2019
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