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 Wednesday
The remnants of a weak front passing into central British Columbia continues to drape showers across the Olympics and the west slopes of the Cascades from about North Bend/I-90 and north to the Canadian border. Further south and east of Snoqualmie Pass there's a pretty rapid transition to clear skies this afternoon. The front will continue to sputter out light showers tonight in the same geographic areas as an upper-level ridge begins to build offshore.
The upper-level ridge will amplify and pass inland on Saturday, bringing dry and milder conditions for the area. The Olympics and the west slopes of the Cascades from about Snoqualmie Pass and northward will be sandwiched between leftover low clouds from Friday night and periods of high clouds from the next incoming system moving in during the afternoon hours. Once again, areas further south and east, including Mt Rainier area, I-90 east of Snoqualmie, and down to Mt. Hood should see mostly sunshine on Saturday. In these sunny areas, freezing levels will climb the highest; into the 7000-8000 ft range. Moderate easterly flow should develop in the Cascade Passes Saturday afternoon and continue Saturday night. Saturday night, a slowly approaching frontal system will spread increasing clouds over the region. This weak frontal system now looks like it won't arrive until Sunday mid-day for western Washington. Little to no precipitation is likely to spill over to the east side on Sunday.
Weather Forecast
Hurricane Ridge
| Friday Night | Cloudy with light rain and snow scattered showers. |
| Saturday | Mostly cloudy in the morning becoming partly sunny mid-day with periods of high clouds. |
Mt. Baker
| Friday Night | Light rain and snow showers. |
| Saturday | Mostly cloudy in the morning becoming partly sunny mid-day with periods of high clouds. |
Washington Pass and Leavenworth
| Friday Night | Mostly cloudy. |
| Saturday | Mostly sunny. |
Stevens and Snoqualmie Pass
| Friday Night | Mostly cloudy with light rain and snow scattered showers. Light east wind at Pass level. |
| Saturday | Mostly cloudy in the morning becoming partly to mostly sunny mid-day with periods of high clouds. Light east wind at Pass level becoming moderate late in the day. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Mostly clear. |
| Saturday | Mostly sunny. |
Mt. Hood
| Friday Night | Mostly clear. |
| Saturday | Mostly sunny. |
Issued: 2:13 PM PST Friday, November 20, 2020
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 | 4000' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' |
| Friday Night | Snow Level | 4000' | 3500' | 3000' | 3000' | 3500' | 3500' | 3500' | 4000' |
| Saturday Morning | Freezing Level | 4000' | 3000' | 2500' | 3000' | 3500' | 3500' | 3500' | 5000' |
| Saturday Afternoon | Freezing Level * | 5500' | 4500' | 4500' | 5000' | 5500' | 6500' | 7000' | 7500' |
| Saturday Evening | Freezing Level * | 6000' | 4500' | 4000' | 3500' | 5000' | 6000' | 6500' | 8000' |
| Saturday Night | Freezing Level * | 7000' | 4500' | 2500' | 2500' | 4000' | 6000' | 6000' | 8000' |
| Sunday Morning | Snow Level * | 3500' | 3000' | 2500' | 2500' | 3000' | 3500' | 4000' | 4500' |
| Sunday Afternoon | Snow Level | 3500' | 3000' | 2500' | 2000' | 2500' | 2500' | 3500' | 3500' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Freezing Level 4000' |
| Saturday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 6000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 7000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 3500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Freezing Level 3000' |
| Saturday Afternoon |
Freezing Level 4500' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 4500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 3000' |
| Saturday Morning |
Freezing Level 2500' |
| Saturday Afternoon |
Freezing Level 4500' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 4000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 3000' |
| Saturday Morning |
Freezing Level 3000' |
| Saturday Afternoon |
Freezing Level 5000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 3500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Morning |
Snow Level 2500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2000' |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Freezing Level 3500' |
| Saturday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 5000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Freezing Level 3500' |
| Saturday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 6000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 6000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 3500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 3500' |
| Saturday Morning |
Freezing Level 3500' |
| Saturday Afternoon |
Freezing Level 7000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 6000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Freezing Level 5000' |
| Saturday Afternoon |
Freezing Level 7500' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 8000' (Easterly Flow *) |
| Sunday Morning |
Snow Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' |
* 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 | Wednesday | Wednesday Night | Wednesday | |
|---|---|---|---|---|
| 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 | LT 0.10 |
| Washington Pass | LT 0.10 | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | LT 0.10 | 0 | 0 | LT 0.10 |
| Snoqualmie Pass | LT 0.10 | 0 | 0 | LT 0.10 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | 0 | 0 | 0 | LT 0.10 |
| Paradise | 0 | 0 | 0 | LT 0.25 |
| White Pass | 0 | 0 | 0 | LT 0.10 |
| Mt Hood Meadows | 0 | 0 | 0 | LT 0.10 |
| Timberline | 0 | 0 | 0 | LT 0.10 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | LT 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | LT 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | LT 0.10 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Wednesday | 0 |
| Wednesday Night | 0 |
| Wednesday | 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: 2:13 PM PST Friday, November 20, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | SW 10 - 20 | SW 10 - 20 | W 5 - 15 | W 0 - 10 | W 0 - 10 |
| Friday Night | W 15 - 25 | SW 0 - 10 | W 10 - 20 | W 0 - 10 | W 0 - 10 |
| Saturday Morning | S 0 - 10 | W 0 - 10 | W 15 - 25 | S 0 - 10 | S 0 - 10 |
| Saturday Afternoon | VAR 0 - 10 | S 0 - 10 | E 5 - 15 | SE 0 - 10 | SE 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | W 15 - 25 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | VAR 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 0 - 10 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | S 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | E 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | W 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | SE 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | W 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | SE 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | W 15 - 25 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | VAR 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 0 - 10 |
| Saturday Morning | W 0 - 10 |
| Saturday Afternoon | S 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | W 5 - 15 |
| Friday Night | W 10 - 20 |
| Saturday Morning | W 15 - 25 |
| Saturday Afternoon | E 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | W 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | SE 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | W 0 - 10 |
| Friday Night | W 0 - 10 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | SE 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 Evening | W 25 - 35 | W 30 - 40 | W 25 - 35 | W 20 - 30 | NW 10 - 20 |
| Friday Night | NW 25 - 35 | NW 30 - 40 | NW 30 - 40 | NW 25 - 35 | NW 10 - 20 |
| Saturday Morning | NW 20 - 30 | NW 25 - 35 | NW 20 - 30 | NW 20 - 30 | NW 15 - 25 |
| Saturday Afternoon | SW 10 - 20 | SW 10 - 20 | WSW 15 - 25 | WSW 10 - 20 | W 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | W 25 - 35 |
| Friday Night | NW 25 - 35 |
| Saturday Morning | NW 20 - 30 |
| Saturday Afternoon | SW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | W 30 - 40 |
| Friday Night | NW 30 - 40 |
| Saturday Morning | NW 25 - 35 |
| Saturday Afternoon | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | W 25 - 35 |
| Friday Night | NW 30 - 40 |
| Saturday Morning | NW 20 - 30 |
| Saturday Afternoon | WSW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | W 20 - 30 |
| Friday Night | NW 25 - 35 |
| Saturday Morning | NW 20 - 30 |
| Saturday Afternoon | WSW 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | NW 10 - 20 |
| Friday Night | NW 10 - 20 |
| Saturday Morning | NW 15 - 25 |
| Saturday Afternoon | W 0 - 10 |
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: 2:13 PM PST Friday, November 20, 2020
Extended Weather Synopsis for Wednesday night through Wednesday
A quick moving and slightly stronger frontal system will follow on the Sunday system's heels...arriving Sunday night into Monday. This system may produce 0.25-0.50" of water equivalent along the west slopes of the Cascades with less elsewhere.
Snow levels will be back on the rise Monday night and Tuesday as a much stronger Pacific frontal system winds up in the Gulf of Alaska. Warm frontal precipitation will brush the area during this period but it is unclear how heavy warm frontal precipitation will be over the area. While we wait for a strong cold front to arrive late Tuesday or Tuesday night, snow levels will continue to stay elevated while we are in the warm sector of the storm.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Snow Level | 2000' - 3000' | 2000' - 3000' | 2500' - 3500' | |
| Monday | Snow Level | 2500' - 3500' | 3000' - 4000' | 3500' - 4500' | |
| Monday Night | Snow Level | 3500' - 4500' | 4000' - 5000' | 4500' - 5500' | * |
| Tuesday | Snow Level | 5000' - 6000' | 5500' - 6500' | 5500' - 6500' | * |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Snow Level 2000' - 3000' |
| Monday |
Snow Level 2500' - 3500' |
| Monday Night |
Snow Level 3500' - 4500' (Easterly Flow *) |
| Tuesday |
Snow Level 5000' - 6000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Snow Level 2000' - 3000' |
| Monday |
Snow Level 3000' - 4000' |
| Monday Night |
Snow Level 4000' - 5000' (Easterly Flow *) |
| Tuesday |
Snow Level 5500' - 6500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Snow Level 2500' - 3500' |
| Monday |
Snow Level 3500' - 4500' |
| Monday Night |
Snow Level 4500' - 5500' (Easterly Flow *) |
| Tuesday |
Snow Level 5500' - 6500' (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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Previous forecast from Nov 19, 2020
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