Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Sunday & Sunday
A rapidly developing low curled toward the northern tip of Vancouver Island Saturday night lifting a warm front over our area. Rain was the predominant precipitation type on Sunday with over 2 inches of water at Mt. Baker since 2 am! Winds were also quite strong with this system. The cold front is pushing through early this afternoon and rain has changed to snow at the higher elevation stations as of 2 pm. Washington Pass has stayed near or below freezing through this event while other Cascade east slope stations have warmed. Snow levels in the northeast Cascades should briefly peak this afternoon with possible rain mixing in at the Washington Pass level.
Light to moderate snow showers and a cooling trend will follow Sunday night with winds easing as the upper level trough traverses the region. A quick 3-6 inches of snow, perhaps a bit more at Baker, is possible late Sunday afternoon through Monday morning.
A transient upper level ridge will quickly build on Monday with light showers decreasing during the day. However plenty of clouds and moisture will be trapped along the west slopes of the Cascades near the crest. Afternoon sunbreaks are more likely over the south and central Cascades and Cascade east slopes.
The next frontal system offshore will begin to brush the Olympics and north Cascades with warm frontal precipitation Monday night.
Weather Forecast
Olympics
| Sunday Afternoon |
Rain and snow becoming light to moderate showers early afternoon. Cooling trend beginning in the afternoon. Windy. |
| Sunday Night |
Light to occasionally moderate showers. Cooler. |
| Monday |
Cloudy with scattered light showers. |
| Monday Night |
Light rain and snow developing overnight and becoming moderate. Slight warming trend. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Sunday Afternoon |
Rain and snow becoming showers late. Cooling trend later in the afternoon. Windy. |
| Sunday Night |
Light to moderate showers. Heaviest showers Mt. Baker area. Cooler. |
| Monday |
Cloudy with scattered light showers. |
| Monday Night |
Light rain and snow developing north Cascades overnight and spreading southward. Becoming moderate Mt. Baker area late overnight. Slight warming trend. |
East slopes of the Washington Cascades
| Sunday Afternoon |
Light to moderate rain and snow becoming light to moderate showers late. Warming trend peaking early afternoon. Windy. |
| Sunday Night |
Light showers. Cooler. |
| Monday |
Mostly cloudy with scattered light showers. |
| Monday Night |
Light rain and snow developing northeast Cascades overnight and spreading southward. |
Mt. Hood Area
| Sunday Afternoon |
Moderate rain and snow becoming light to moderate showers late. Cooling trend later in the afternoon. Windy. |
| Sunday Night |
Light to occasionally moderate showers. Cooler. |
| Monday |
Cloudy with scattered light showers. |
| Monday Night |
Cloudy with light rain and snow developing overnight. Slight warming trend. |
Issued: 3:01 PM PST Sunday, November 26, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Afternoon | Snow Level | 3500' | 4000' | 5500' | ' | ' | 4500' | ' | 4500' |
| Sunday Night | Snow Level | 2500' | 2500' | 2000' | ' | ' | 2500' | ' | 3000' |
| Monday Morning | Snow Level | 2500' | 2500' | 2000' | ' | ' | 2500' | ' | 3000' |
| Monday Afternoon | Snow Level | 3000' | 2500' | 2500' | ' | ' | 3000' | ' | 3500' |
| Monday Night | Snow Level * | 4500' | 3500' | 3000' | ' | ' | 3500' | ' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level 3500' |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' |
| Monday Night |
Snow Level 4500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level 4000' |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Night |
Snow Level 3500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level 5500' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Night |
Snow Level 3000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level 4500' |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' |
| Monday Night |
Snow Level 3500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level ' |
| Sunday Night |
Snow Level ' |
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Afternoon |
Snow Level 4500' |
| Sunday Night |
Snow Level 3000' |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Night |
Snow Level 5000' (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
| Sunday | Sunday | |
|---|---|---|
| Hurricane Ridge | 0 - 1.00 | 0 - 0.50 |
| Mt Baker Ski Area | 2.00 - 3.00 | 0.75 - 1.00 |
| Washington Pass | 0 - 0.75 | 0.25 - 0.50 |
| Stevens Pass | 0.50 - 0.75 | 0.50 - 0.75 |
| Snoqualmie Pass | 0 - 0.75 | 0.50 - 0.75 |
| Mission Ridge | LT 0.25 | LT 0.10 |
| Crystal Mt | 0 - 1.00 | 0.25 - 0.50 |
| Paradise | 1.00 - 1.50 | 0.75 - 1.00 |
| White Pass | 0.50 - 0.75 | 0.25 - 0.50 |
| Mt Hood Meadows | 0 - 0.75 | 0 - 0.50 |
| Timberline | 0 - 1.00 | 0.50 - 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: 3:01 PM PST Sunday, November 26, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Afternoon | SW 20 - 30 | SW 25 - 40 | WSW 25 - 40 | --- - | W 20 - 30 |
| Sunday Night | SW 15 - 25 | SW 10 - 20 | WSW 15 - 30 | --- - | WSW 15 - 25 |
| Monday Morning | SW 10 - 20 | SW 10 - 20 | WSW 15 - 30 | --- - | WSW 20 - 30 |
| Monday Afternoon | S 5 - 15 | SW 5 - 15 | WSW 10 - 20 | --- - | SW 15 - 25 |
| Monday Night | S 20 - 30 | SSE 10 - 20 | S 10 - 20 | --- - | SW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night | SW 15 - 25 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | S 5 - 15 |
| Monday Night | S 20 - 30 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Afternoon | SW 25 - 40 |
| Sunday Night | SW 10 - 20 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 5 - 15 |
| Monday Night | SSE 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Afternoon | WSW 25 - 40 |
| Sunday Night | WSW 15 - 30 |
| Monday Morning | WSW 15 - 30 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | S 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Sunday Afternoon | W 20 - 30 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | SW 15 - 25 |
| Monday Night | SW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 20 - 30 |
| Sunday Night | SW 15 - 25 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | S 5 - 15 |
| Monday Night | S 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 25 - 40 |
| Sunday Night | SW 10 - 20 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | SW 5 - 15 |
| Monday Night | SSE 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | WSW 25 - 40 |
| Sunday Night | WSW 15 - 30 |
| Monday Morning | WSW 15 - 30 |
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | S 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Afternoon | W 20 - 30 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | SW 15 - 25 |
| Monday Night | SW 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 | |
|---|---|---|---|---|---|
| Sunday Afternoon | SW 30 - 40 | SW 30 - 50 | SW 40 - 60 | --- - | SW 40 - 60 |
| Sunday Night | SW 30 - 40 | WSW 40 - 50 | WSW 35 - 50 | --- - | W 30 - 40 |
| Monday Morning | WSW 20 - 30 | W 40 - 50 | W 50 - 60 | --- - | W 40 - 50 |
| Monday Afternoon | WSW 15 - 25 | W 25 - 35 | W 35 - 45 | --- - | W 25 - 35 |
| Monday Night | SW 30 - 40 | SW 30 - 40 | SW 30 - 50 | --- - | SW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 30 - 40 |
| Sunday Night | SW 30 - 40 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | WSW 15 - 25 |
| Monday Night | SW 30 - 40 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 30 - 50 |
| Sunday Night | WSW 40 - 50 |
| Monday Morning | W 40 - 50 |
| Monday Afternoon | W 25 - 35 |
| Monday Night | SW 30 - 40 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 40 - 60 |
| Sunday Night | WSW 35 - 50 |
| Monday Morning | W 50 - 60 |
| Monday Afternoon | W 35 - 45 |
| Monday Night | SW 30 - 50 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Afternoon | --- - |
| Sunday Night | --- - |
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Afternoon | SW 40 - 60 |
| Sunday Night | W 30 - 40 |
| Monday Morning | W 40 - 50 |
| Monday Afternoon | W 25 - 35 |
| Monday Night | SW 25 - 35 |
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: 3:01 PM PST Sunday, November 26, 2017
Extended Weather Synopsis for Sunday night through Sunday
A fast moving frontal system will sweep through the area Tuesday morning with only a slight bump in snow levels before colder air and more showery weather moves in for the latter half of Tuesday. Showers should diminish Tuesday night as weak upper level ridging builds offshore. Wednesday had been looking dry but now very light rain and snow are likely to brush the north Cascades and Olympics ahead of the next Pacific frontal system. The frontal system will flatten the ridge on Thursday as precipitation spreads over the area in westerly flow aloft. There may be a more significant warming trend with this system.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Moderate to occasionally heavy rain and snow becoming showers in the afternoon. Cooling trend in the afternoon. Showers decreasing overnight.
Periods of very light rain rain and snow Olympics and northwest Cascades. Cloudy Olympics and north Cascades, mostly cloudy central and south Cascades and Mt. Hood.
Rain and snow increasing on Thursday. Warming trend likely.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Morning | Snow Level | 3000' - 4000' | 3000' - 4000' | 4500' - 5500' | * |
| Tuesday Afternoon | Snow Level | 2500' - 3500' | 2500' - 3500' | 3000' - 4000' | |
| Tuesday Night | Snow Level | 2000' - 3000' | 2000' - 3000' | 2000' - 3000' | |
| Wednesday | Snow Level | 2500' - 3500' | 3000' - 4000' | 3500' - 4500' | |
| Wednesday Night | Snow Level | 3000' - 4000' | 3500' - 4500' | 4500' - 5500' | |
| Thursday | Snow Level | 3000' - 4000' | 4000' - 5000' | 5000' - 6000' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 3000' - 4000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 2500' - 3500' |
| Tuesday Night |
Snow Level 2000' - 3000' |
| Wednesday |
Snow Level 2500' - 3500' |
| Wednesday Night |
Snow Level 3000' - 4000' |
| Thursday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 3000' - 4000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 2500' - 3500' |
| Tuesday Night |
Snow Level 2000' - 3000' |
| Wednesday |
Snow Level 3000' - 4000' |
| Wednesday Night |
Snow Level 3500' - 4500' |
| Thursday |
Snow Level 4000' - 5000' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Morning |
Snow Level 4500' - 5500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 3000' - 4000' |
| Tuesday Night |
Snow Level 2000' - 3000' |
| Wednesday |
Snow Level 3500' - 4500' |
| Wednesday Night |
Snow Level 4500' - 5500' |
| Thursday |
Snow Level 5000' - 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.
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 26, 2017
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