Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Thursday night through Thursday
We're in for a slight change in the weather as wrap-up the week and head into the weekend. Expect cool and clear conditions Thursday night with inversions once again bring chilly temperatures to the mountain valleys and passes, while higher elevations slopes stay mild. Things begin to change on Friday as a weak shortwave system crossing British Columbia pushes up against the high-pressure ridge that's been keeping us warm and dry. While the ridge holds most of the precipitation out of our area, the system does manage to bring clouds and cooler air into the Pacific Northwest. On Friday, most locations will see clouds moving in from the north and growing thicker in the afternoon. Cooler air, sliding in from Canada, will limit day time warming and a few locations could even see temperatures fall throughout the day. While you can't ruler out a stray shower near the Canadian border, most locations will remain dry.
As the weak weather system pushes past Friday night, a concentrated round of light showers could sweep through the Cascades, with most of the activity focussed from highway 2 north. Don't look for much in the way of precipitation from this little system. At most, a few locations may see a healthy dusting of snow. The biggest impacts for our region as a whole will be the cooler temperatures and increasing winds.
By Saturday morning, most of the precipitation exits the region, and we're left with clearing skies and cool dry northwesterly flow. As the ridge in the Pacific rebounds, we should quickly return to warm sunny days and cool clear nights.
Weather Forecast
Hurricane Ridge
| Thursday Night | Clear with a few high thin clouds. |
| Friday | Sunny with a few high thin clouds. |
Mt. Baker
| Thursday Night | Clear with a few high thin clouds. |
| Friday | Clouds increasing during the day. Becoming mostly cloudy. Slight chance of an isolated shower in the late afternoon. |
Washington Pass and Leavenworth
| Thursday Night | Clear with a few high thin clouds possible. |
| Friday | Mostly sunny with clouds increasing in the afternoon. Slight chance of an isolated shower near Washington Pass in the afternoon. |
Stevens and Snoqualmie Pass
| Thursday Night | Clear with the possibility of a few high thin clouds. Light westerly pass level winds. |
| Friday | Mostly sunny becoming mostly cloudy in the afternoon. Northwesterly winds increasing in the afternoon. |
Mt. Rainier, Crystal and White Pass
| Thursday Night | Clear with the possibility of a few high thin clouds. |
| Friday | Mostly sunny with clouds increasing in the afternoon. Northwesterly winds increasing in the afternoon. |
Mt. Hood
| Thursday Night | Clear with the possibility of a few high thin clouds. |
| Friday | Sunny with the possibility of a few high thin clouds. Northwesterly winds increasing in the afternoon. |
Issued: 1:48 PM PDT Thursday, April 9, 2020
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Thursday Evening | Freezing Level | 11000' | 9500' | 10000' | 11500' | 11500' | 11500' | 12000' | 12000' |
| Thursday Night | Freezing Level | 10000' | 9000' | 9000' | 11000' | 10500' | 11000' | 11500' | 11500' |
| Friday Morning | Freezing Level | 9000' | 7500' | 7500' | 9500' | 9000' | 9000' | 10500' | 11000' |
| Friday Afternoon | Freezing Level | 8500' | 7000' | 7000' | 8000' | 7500' | 7500' | 8500' | 11000' |
| Friday Evening | Freezing Level | 8000' | 6500' | 6500' | 7500' | 6500' | 6500' | 7500' | 10000' |
| Friday Night | Freezing Level | 7000' | 5000' | 5000' | 6000' | 5000' | 5000' | 5000' | 7500' |
| Saturday Morning | Freezing Level | 5000' | 4000' | 4000' | 5000' | 4500' | 4500' | 4500' | 5000' |
| Saturday Afternoon | Freezing Level | 5500' | 5000' | 5000' | 6000' | 5500' | 5500' | 6000' | 6000' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 11000' |
| Thursday Night |
Freezing Level 10000' |
| Friday Morning |
Freezing Level 9000' |
| Friday Afternoon |
Freezing Level 8500' |
| Friday Evening |
Freezing Level 8000' |
| Friday Night |
Freezing Level 7000' |
| Saturday Morning |
Freezing Level 5000' |
| Saturday Afternoon |
Freezing Level 5500' |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 9500' |
| Thursday Night |
Freezing Level 9000' |
| Friday Morning |
Freezing Level 7500' |
| Friday Afternoon |
Freezing Level 7000' |
| Friday Evening |
Freezing Level 6500' |
| Friday Night |
Freezing Level 5000' |
| Saturday Morning |
Freezing Level 4000' |
| Saturday Afternoon |
Freezing Level 5000' |
| Washington Pass | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 10000' |
| Thursday Night |
Freezing Level 9000' |
| Friday Morning |
Freezing Level 7500' |
| Friday Afternoon |
Freezing Level 7000' |
| Friday Evening |
Freezing Level 6500' |
| Friday Night |
Freezing Level 5000' |
| Saturday Morning |
Freezing Level 4000' |
| Saturday Afternoon |
Freezing Level 5000' |
| Leavenworth | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 11500' |
| Thursday Night |
Freezing Level 11000' |
| Friday Morning |
Freezing Level 9500' |
| Friday Afternoon |
Freezing Level 8000' |
| Friday Evening |
Freezing Level 7500' |
| Friday Night |
Freezing Level 6000' |
| Saturday Morning |
Freezing Level 5000' |
| Saturday Afternoon |
Freezing Level 6000' |
| Stevens Pass | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 11500' |
| Thursday Night |
Freezing Level 10500' |
| Friday Morning |
Freezing Level 9000' |
| Friday Afternoon |
Freezing Level 7500' |
| Friday Evening |
Freezing Level 6500' |
| Friday Night |
Freezing Level 5000' |
| Saturday Morning |
Freezing Level 4500' |
| Saturday Afternoon |
Freezing Level 5500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 11500' |
| Thursday Night |
Freezing Level 11000' |
| Friday Morning |
Freezing Level 9000' |
| Friday Afternoon |
Freezing Level 7500' |
| Friday Evening |
Freezing Level 6500' |
| Friday Night |
Freezing Level 5000' |
| Saturday Morning |
Freezing Level 4500' |
| Saturday Afternoon |
Freezing Level 5500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 12000' |
| Thursday Night |
Freezing Level 11500' |
| Friday Morning |
Freezing Level 10500' |
| Friday Afternoon |
Freezing Level 8500' |
| Friday Evening |
Freezing Level 7500' |
| Friday Night |
Freezing Level 5000' |
| Saturday Morning |
Freezing Level 4500' |
| Saturday Afternoon |
Freezing Level 6000' |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 12000' |
| Thursday Night |
Freezing Level 11500' |
| Friday Morning |
Freezing Level 11000' |
| Friday Afternoon |
Freezing Level 11000' |
| Friday Evening |
Freezing Level 10000' |
| Friday Night |
Freezing Level 7500' |
| Saturday Morning |
Freezing Level 5000' |
| Saturday 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
| Thursday Night | Thursday | Thursday Night | Thursday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | 0 | 0 |
| Mt Baker Ski Area | 0 | 0 | LT 0.10 | LT 0.10 |
| Washington Pass | 0 | 0 | LT 0.10 | LT 0.10 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | LT 0.10 | 0 |
| Snoqualmie Pass | 0 | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | 0 | 0 | 0 | 0 |
| Paradise | 0 | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | 0 | 0 | 0 |
| Timberline | 0 | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| 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: 1:48 PM PDT Thursday, April 9, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Evening | W 5 - 15 | W 5 - 15 | WNW 10 - 20 | NW 5 - 15 | NW 5 - 15 |
| Thursday Night | W 5 - 15 | W 5 - 15 | NW 10 - 20 | NNW 5 - 15 | NW 10 - 20 |
| Friday Morning | W 5 - 15 | W 5 - 15 | NW 10 - 20 | NW 5 - 15 | NW 15 - 25 |
| Friday Afternoon | W 5 - 15 | W 5 - 15 | NW 15 - 25 | WNW 10 - 20 | NW 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening | W 5 - 15 |
| Thursday Night | W 5 - 15 |
| Friday Morning | W 5 - 15 |
| Friday Afternoon | W 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening | W 5 - 15 |
| Thursday Night | W 5 - 15 |
| Friday Morning | W 5 - 15 |
| Friday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening | WNW 10 - 20 |
| Thursday Night | NW 10 - 20 |
| Friday Morning | NW 10 - 20 |
| Friday Afternoon | NW 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday Evening | NW 5 - 15 |
| Thursday Night | NNW 5 - 15 |
| Friday Morning | NW 5 - 15 |
| Friday Afternoon | WNW 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening | NW 5 - 15 |
| Thursday Night | NW 10 - 20 |
| Friday Morning | NW 15 - 25 |
| Friday Afternoon | NW 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday Evening | W 5 - 15 |
| Thursday Night | W 5 - 15 |
| Friday Morning | W 5 - 15 |
| Friday Afternoon | W 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | W 5 - 15 |
| Thursday Night | W 5 - 15 |
| Friday Morning | W 5 - 15 |
| Friday Afternoon | W 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | WNW 10 - 20 |
| Thursday Night | NW 10 - 20 |
| Friday Morning | NW 10 - 20 |
| Friday Afternoon | NW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | NW 5 - 15 |
| Thursday Night | NNW 5 - 15 |
| Friday Morning | NW 5 - 15 |
| Friday Afternoon | WNW 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | NW 5 - 15 |
| Thursday Night | NW 10 - 20 |
| Friday Morning | NW 15 - 25 |
| Friday Afternoon | NW 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 | |
|---|---|---|---|---|---|
| Thursday Evening | NW 20 - 30 | NW 20 - 30 | NW 25 - 35 | NW 15 - 25 | NNW 15 - 25 |
| Thursday Night | NW 30 - 40 | NW 25 - 35 | NW 30 - 40 | NW 25 - 35 | NNW 20 - 30 |
| Friday Morning | NW 25 - 35 | NW 20 - 30 | NW 30 - 40 | NW 30 - 40 | NNW 25 - 35 |
| Friday Afternoon | NW 20 - 30 | NW 15 - 25 | NW 35 - 45 | NW 30 - 40 | NW 30 - 40 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | NW 20 - 30 |
| Thursday Night | NW 30 - 40 |
| Friday Morning | NW 25 - 35 |
| Friday Afternoon | NW 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday Evening | NW 20 - 30 |
| Thursday Night | NW 25 - 35 |
| Friday Morning | NW 20 - 30 |
| Friday Afternoon | NW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | NW 25 - 35 |
| Thursday Night | NW 30 - 40 |
| Friday Morning | NW 30 - 40 |
| Friday Afternoon | NW 35 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | NW 15 - 25 |
| Thursday Night | NW 25 - 35 |
| Friday Morning | NW 30 - 40 |
| Friday Afternoon | NW 30 - 40 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | NNW 15 - 25 |
| Thursday Night | NNW 20 - 30 |
| Friday Morning | NNW 25 - 35 |
| Friday Afternoon | NW 30 - 40 |
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: 1:48 PM PDT Thursday, April 9, 2020
Extended Weather Synopsis for Thursday night through Thursday
As we move through the weekend, we once again settle into a rhythm of cold clear nights and warm sunny days. Look for temperatures inversions to develop each evening in the mountain valleys and passes, allowing lower elevations sites to get downright chilly. After a nippy start each morning, sunny skies should allow temperatures to rise quickly. The extended forecast period doesn't appear too hot, however. Cool north to northwest flow should keep this stretch of dry weather a bit milder than we experienced the first week of April.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Saturday Night | Freezing Level | 2500' - 4500' | 4000' - 6000' | 5000' - 6500' | * |
| Sunday | Freezing Level | 4000' - 6000' | 4000' - 6000' | 5500' - 7000' | * |
| Sunday Night | Freezing Level | 4000' - 5500' | 4500' - 6000' | 6500' - 7500' | |
| Monday | Freezing Level | 5500' - 7000' | 5500' - 7000' | 6500' - 7500' |
| Mt. Baker | Elevation |
|---|---|
| Saturday Night |
Freezing Level 2500' - 4500' (Easterly Flow *) |
| Sunday |
Freezing Level 4000' - 6000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 4000' - 5500' |
| Monday |
Freezing Level 5500' - 7000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Night |
Freezing Level 4000' - 6000' (Easterly Flow *) |
| Sunday |
Freezing Level 4000' - 6000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 4500' - 6000' |
| Monday |
Freezing Level 5500' - 7000' |
| Mt. Hood | Elevation |
|---|---|
| Saturday Night |
Freezing Level 5000' - 6500' (Easterly Flow *) |
| Sunday |
Freezing Level 5500' - 7000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 6500' - 7500' |
| Monday |
Freezing Level 6500' - 7500' |
* 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 Apr 8, 2020
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