Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Friday & Sunday
The late winter weather continues in the Olympics and Cascades.
Increasing southwest flow aloft began to carry a front into the Northwest on Thursday night. NWAC stations along the Cascade west slopes above the Pass levels had 5-9 inches of snow by 5 am Friday morning.
Radar indicates the somewhat slow moving front has crossed the Olympics and it will continue across the Cascades Friday morning causing moderate to occasional heavy rain or snow which which should be generally heavier on the volcanoes.
Yesterday afternoon's UW WRF run indicates a temporary decrease in showers following the front Friday midday.
An upper trough and slightly unstable airmass should move across the Northwest Friday afternoon to Saturday morning. This should cause renewed showers Friday afternoon which should continue to be a bit heavier on the volcanoes. Yesterday afternoon's UW WRF run indicates that convergence will generally stay up around the Glacier Peak area.
A weak shortwave ridge should move over the Northwest and minor surface high pressure should build north over the area Saturday afternoon and night.
Weather Forecast
Olympics
Friday Morning |
Light to moderate showers. Moderate alpine winds. |
Friday Mid-day |
Light to moderate showers. Moderate alpine winds. |
Friday Afternoon |
Renewed moderate occasional heavy showers. Moderate alpine winds. |
Friday Night - Saturday Morning |
Decreasing light showers. |
Saturday Afternoon - Saturday Night |
Light showers decreasing and ending. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
Friday Morning |
Moderate occasional heavy rain or snow generally heaviest on the volcanoes. Moderate alpine winds. |
Friday Mid-day |
Light to moderate showers. Moderate alpine winds. |
Friday Afternoon |
Renewed moderate occasional heavy showers generally heaviest on the volcanoes. Moderate alpine winds. |
Friday Night - Saturday Morning |
Decreasing light showers. |
Saturday Afternoon - Saturday Night |
Light showers decreasing and ending. |
East slopes of the Washington Cascades
Friday Morning |
Moderate rain or snow. Moderate alpine winds. |
Friday Mid-day |
Light showers. Moderate alpine winds. |
Friday Afternoon |
Renewed light to moderate showers. Moderate alpine winds. |
Friday Night - Saturday Morning |
Decreasing light showers heaviest higher elevations. |
Saturday Afternoon - Saturday Night |
Light showers higher elevations decreasing and ending. |
Mt. Hood Area
Friday Morning |
Moderate occasional heavy rain or snow. Moderate alpine winds. |
Friday Mid-day |
Light to moderate showers. Moderate alpine winds. |
Friday Afternoon |
Renewed moderate occasional heavy showers. Moderate alpine winds. |
Friday Night - Saturday Morning |
Decreasing light showers. |
Saturday Afternoon - Saturday Night |
Light showers decreasing and ending. |
Issued: 8:28 AM PDT Friday, March 24, 2017
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 * | 3500' | 3500' | 3500' | ' | ' | 4000' | ' | 4500' |
Friday Afternoon | Snow Level | 4000' | 4000' | 4000' | ' | ' | 4500' | ' | 5000' |
Friday Night - Saturday Afternoon | Snow Level | 3000' | 3000' | 3000' | ' | ' | 3500' | ' | 4000' |
Saturday Night | Snow Level | 2500' | 2500' | 2500' | ' | ' | 3000' | ' | 3500' |
Hurricane Ridge | Elevation |
---|---|
Friday Morning |
Snow Level 3500' (Easterly Flow *) |
Friday Afternoon |
Snow Level 4000' |
Friday Night - Saturday Afternoon |
Snow Level 3000' |
Saturday Night |
Snow Level 2500' |
Mt. Baker | Elevation |
---|---|
Friday Morning |
Snow Level 3500' (Easterly Flow *) |
Friday Afternoon |
Snow Level 4000' |
Friday Night - Saturday Afternoon |
Snow Level 3000' |
Saturday Night |
Snow Level 2500' |
Washington Pass | Elevation |
---|---|
Friday Morning |
Snow Level 3500' (Easterly Flow *) |
Friday Afternoon |
Snow Level 4000' |
Friday Night - Saturday Afternoon |
Snow Level 3000' |
Saturday Night |
Snow Level 2500' |
Leavenworth | Elevation |
---|---|
Friday Morning |
Snow Level ' (Easterly Flow *) |
Friday Afternoon |
Snow Level ' |
Friday Night - Saturday Afternoon |
Snow Level ' |
Saturday Night |
Snow Level ' |
Stevens Pass | Elevation |
---|---|
Friday Morning |
Snow Level ' (Easterly Flow *) |
Friday Afternoon |
Snow Level ' |
Friday Night - Saturday Afternoon |
Snow Level ' |
Saturday Night |
Snow Level ' |
Snoqualmie Pass | Elevation |
---|---|
Friday Morning |
Snow Level 4000' (Easterly Flow *) |
Friday Afternoon |
Snow Level 4500' |
Friday Night - Saturday Afternoon |
Snow Level 3500' |
Saturday Night |
Snow Level 3000' |
Mt. Rainier & Crystal | Elevation |
---|---|
Friday Morning |
Snow Level ' (Easterly Flow *) |
Friday Afternoon |
Snow Level ' |
Friday Night - Saturday Afternoon |
Snow Level ' |
Saturday Night |
Snow Level ' |
Mt. Hood | Elevation |
---|---|
Friday Morning |
Snow Level 4500' (Easterly Flow *) |
Friday Afternoon |
Snow Level 5000' |
Friday Night - Saturday Afternoon |
Snow Level 4000' |
Saturday Night |
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
Sunday | Sunday | |
---|---|---|
Hurricane Ridge | 0 - 0.50 | LT 0.25 |
Mt Baker Ski Area | 0 - 1.00 | 0.25 - 0.50 |
Washington Pass | 0 - 0.75 | LT 0.25 |
Stevens Pass | 0 - 0.75 | LT 0.25 |
Snoqualmie Pass | 0.75 - 1.00 | 0.25 - 0.50 |
Mission Ridge | 0 - 0.50 | LT 0.10 |
Crystal Mt | 0 - 0.50 | LT 0.25 |
Paradise | 0 - 1.00 | 0.25 - 0.50 |
White Pass | 0 - 0.50 | LT 0.25 |
Mt Hood Meadows | 0 - 1.00 | LT 0.25 |
Timberline | 0 - 1.00 | 0.25 - 0.50 |
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: 8:28 AM PDT Friday, March 24, 2017
Free Winds at 5000' (mph)
Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
---|---|---|---|---|---|
Friday Morning - Friday Afternoon | SSW 20 - 30 | SSW 25 - 35 | SSW 20 - 30 | --- - | SSW 20 - 30 |
Friday Night | SW 20 - 30 | SW 20 - 30 | SW 20 - 30 | --- - | SW 25 - 35 |
Saturday Morning | SW 15 - 25 | SW 15 - 25 | SW 15 - 25 | --- - | SW 15 - 25 |
Saturday Afternoon | WSW 10 - 20 | WSW 10 - 20 | WSW 15 - 25 | --- - | WSW 15 - 25 |
Saturday Night | WSW 15 - 25 | WSW 10 - 20 | WSW 10 - 20 | --- - | WSW 10 - 20 |
Hurricane Ridge | Elevation |
---|---|
Friday Morning - Friday Afternoon | SSW 20 - 30 |
Friday Night | SW 20 - 30 |
Saturday Morning | SW 15 - 25 |
Saturday Afternoon | WSW 10 - 20 |
Saturday Night | WSW 15 - 25 |
Mt. Baker | Elevation |
---|---|
Friday Morning - Friday Afternoon | SSW 25 - 35 |
Friday Night | SW 20 - 30 |
Saturday Morning | SW 15 - 25 |
Saturday Afternoon | WSW 10 - 20 |
Saturday Night | WSW 10 - 20 |
Stevens and Snoqualmie Pass | Elevation |
---|---|
Friday Morning - Friday Afternoon | SSW 20 - 30 |
Friday Night | SW 20 - 30 |
Saturday Morning | SW 15 - 25 |
Saturday Afternoon | WSW 15 - 25 |
Saturday Night | WSW 10 - 20 |
Mt. Rainier | Elevation |
---|---|
Friday Morning - Friday Afternoon | --- - |
Friday Night | --- - |
Saturday Morning | --- - |
Saturday Afternoon | --- - |
Saturday Night | --- - |
Mt. Hood | Elevation |
---|---|
Friday Morning - Friday Afternoon | SSW 20 - 30 |
Friday Night | SW 25 - 35 |
Saturday Morning | SW 15 - 25 |
Saturday Afternoon | WSW 15 - 25 |
Saturday Night | WSW 10 - 20 |
Hurricane Ridge | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | SSW 20 - 30 |
Friday Night | SW 20 - 30 |
Saturday Morning | SW 15 - 25 |
Saturday Afternoon | WSW 10 - 20 |
Saturday Night | WSW 15 - 25 |
Mt. Baker | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | SSW 25 - 35 |
Friday Night | SW 20 - 30 |
Saturday Morning | SW 15 - 25 |
Saturday Afternoon | WSW 10 - 20 |
Saturday Night | WSW 10 - 20 |
Stevens and Snoqualmie Pass | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | SSW 20 - 30 |
Friday Night | SW 20 - 30 |
Saturday Morning | SW 15 - 25 |
Saturday Afternoon | WSW 15 - 25 |
Saturday Night | WSW 10 - 20 |
Mt. Rainier | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | --- - |
Friday Night | --- - |
Saturday Morning | --- - |
Saturday Afternoon | --- - |
Saturday Night | --- - |
Mt. Hood | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | SSW 20 - 30 |
Friday Night | SW 25 - 35 |
Saturday Morning | SW 15 - 25 |
Saturday Afternoon | WSW 15 - 25 |
Saturday Night | WSW 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 Morning - Friday Afternoon | SW 35 - 50 | SW 30 - 45 | SW 30 - 45 | --- - | SW 40 - 60 |
Friday Night | SW 25 - 35 | SW 25 - 35 | SW 25 - 35 | --- - | SW 35 - 50 |
Saturday Morning | WSW 25 - 35 | WSW 20 - 30 | WSW 25 - 35 | --- - | WSW 20 - 30 |
Saturday Afternoon | WSW 20 - 30 | WSW 20 - 30 | WSW 25 - 35 | --- - | WSW 20 - 30 |
Saturday Night | SSW 15 - 25 | SSW 10 - 20 | SSW 15 - 25 | --- - | SSW 20 - 30 |
Mt. Baker | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | SW 35 - 50 |
Friday Night | SW 25 - 35 |
Saturday Morning | WSW 25 - 35 |
Saturday Afternoon | WSW 20 - 30 |
Saturday Night | SSW 15 - 25 |
Washington Pass | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | SW 30 - 45 |
Friday Night | SW 25 - 35 |
Saturday Morning | WSW 20 - 30 |
Saturday Afternoon | WSW 20 - 30 |
Saturday Night | SSW 10 - 20 |
Stevens and Snoqualmie Pass | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | SW 30 - 45 |
Friday Night | SW 25 - 35 |
Saturday Morning | WSW 25 - 35 |
Saturday Afternoon | WSW 25 - 35 |
Saturday Night | SSW 15 - 25 |
Mt. Rainier | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | --- - |
Friday Night | --- - |
Saturday Morning | --- - |
Saturday Afternoon | --- - |
Saturday Night | --- - |
Mt. Hood | Direction - Speed |
---|---|
Friday Morning - Friday Afternoon | SW 40 - 60 |
Friday Night | SW 35 - 50 |
Saturday Morning | WSW 20 - 30 |
Saturday Afternoon | WSW 20 - 30 |
Saturday Night | SSW 20 - 30 |
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 Mar 24, 2017
The NWAC program is administered by the USDA-Forest Service and operates from the National Weather Service Forecast Office in Seattle. NWAC services are made possible by important collaboration and support from a wide variety of federal, state and private cooperators.
Mission Ridge precipitation forecast updated to .5 inches 830 am.