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Weather Synopsis for Wednesday & Saturday
A split upper trough and weak front will move across the Northwest on Wednesday. The south part of the trough will move to California and there won't be a lot of flow aloft over the Northwest. The front is not very organized and so like the NWS the precipitation type in the forecast will be showers. But a cooler air mass following the front and in the upper trough should move to the Northwest Wednesday night. A convergence zone is indicated by the Tuesday afternoon WRF model in the north Cascades near Glacier Peak Wednesday evening.
A weak ridge and weak surface high pressure should move across the Northwest Wednesday night and Thursday. This should give some cloud and sun breaks Thursday afternoon mainly in the south Cascades and east of the crest.
Increasing southwest flow aloft should cause the next slow moving front to begin to arrive over the Northwest on Thursday night.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Wednesday Morning |
Increasing light showers heaviest volcanoes. |
| Wednesday Afternoon |
Increasing light to moderate showers heaviest volcanoes. |
| Wednesday Night - Thursday Morning |
Showers possibly heaviest in convergence in the north Cascades in the evening otherwise light showers decreasing and ending. Cooler with lowering snow levels. |
| Thursday Afternoon |
Mostly cloudy north and partly cloudy south. |
| Thursday Evening - Thursday Night |
Increasing light to moderate rain or snow passes and increasing moderate to heavy rain or snow volcanoes. Increasing alpine winds. Warmer with rising snow levels. |
Olympics
| Wednesday Morning |
Increasing light showers. |
| Wednesday Afternoon |
Increasing light to moderate showers. |
| Wednesday Night - Thursday Morning |
Light showers decreasing and ending. Cooler with lowering snow levels. |
| Thursday Afternoon |
Mostly cloudy. |
| Thursday Evening - Thursday Night |
Increasing moderate to heavy rain or snow. Increasing alpine winds. Warmer with rising snow levels. |
East slopes of the Washington Cascades
| Wednesday Morning |
Increasing light showers mainly higher elevations. |
| Wednesday Afternoon |
Increasing light showers heaviest higher elevations. |
| Wednesday Night - Thursday Morning |
Light showers higher elevations decreasing and ending. Cooler with lowering snow levels. |
| Thursday Afternoon |
Partly sunny north and mostly sunny south. |
| Thursday Evening - Thursday Night |
Increasing light to moderate rain or snow. Increasing alpine winds. Warmer with rising snow levels. |
Mt. Hood Area
| Wednesday Morning |
Increasing light showers. |
| Wednesday Afternoon |
Increasing light to moderate showers. |
| Wednesday Night - Thursday Morning |
Light showers decreasing and ending. Cooler with lowering snow levels. |
| Thursday Afternoon |
Partly sunny. |
| Thursday Evening - Thursday Night |
Increasing moderate to heavy rain or snow. Increasing alpine winds. Warmer with rising snow levels. |
Issued: 7:14 AM PDT Wednesday, March 22, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Wednesday Morning | Snow Level * | 4000' | 4500' | 4500' | ' | ' | 4500' | ' | 5000' |
| Wednesday Afternoon | Snow Level | 3500' | 4000' | 4000' | ' | ' | 4000' | ' | 4500' |
| Wednesday Night - Thursday Morning | Snow Level | 2500' | 2500' | 2500' | ' | ' | 2500' | ' | 3000' |
| Thursday Afternoon - Thursday Night | Snow Level | 3500' | 3500' | 3500' | ' | ' | 4000' | ' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 4000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 3500' |
| Wednesday Night - Thursday Morning |
Snow Level 2500' |
| Thursday Afternoon - Thursday Night |
Snow Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 4500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 4000' |
| Wednesday Night - Thursday Morning |
Snow Level 2500' |
| Thursday Afternoon - Thursday Night |
Snow Level 3500' |
| Washington Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 4500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 4000' |
| Wednesday Night - Thursday Morning |
Snow Level 2500' |
| Thursday Afternoon - Thursday Night |
Snow Level 3500' |
| Leavenworth | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night - Thursday Morning |
Snow Level ' |
| Thursday Afternoon - Thursday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night - Thursday Morning |
Snow Level ' |
| Thursday Afternoon - Thursday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 4500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 4000' |
| Wednesday Night - Thursday Morning |
Snow Level 2500' |
| Thursday Afternoon - Thursday Night |
Snow Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level ' |
| Wednesday Night - Thursday Morning |
Snow Level ' |
| Thursday Afternoon - Thursday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 5000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 4500' |
| Wednesday Night - Thursday Morning |
Snow Level 3000' |
| Thursday Afternoon - Thursday Night |
Snow Level 5000' |
* 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
| Saturday | Saturday | |
|---|---|---|
| Hurricane Ridge | 0.25 - 0.50 | 0 - 0.50 |
| Mt Baker Ski Area | 0 - 1.00 | 0.75 - 1.00 |
| Washington Pass | 0.25 - 0.50 | LT 0.25 |
| Stevens Pass | 0.25 - 0.50 | LT 0.25 |
| Snoqualmie Pass | 0 - 0.50 | 0.25 - 0.50 |
| Mission Ridge | LT 0.25 | LT 0.25 |
| Crystal Mt | LT 0.25 | 0 - 0.50 |
| Paradise | 0.50 - 0.75 | 0 - 0.75 |
| White Pass | 0.25 - 0.50 | LT 0.25 |
| Mt Hood Meadows | 0 - 0.50 | 0.75 - 1.00 |
| Timberline | 0.50 - 0.75 | 0 - 1.00 |
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: 7:14 AM PDT Wednesday, March 22, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Wednesday Morning | SSW 20 - 30 | SSW 20 - 30 | SSW 20 - 30 | --- - | SW 20 - 30 |
| Wednesday Mid-day | SW 15 - 25 | SSW 15 - 25 | SSW 15 - 25 | --- - | SW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 | SW 20 - 30 | SW 20 - 30 | --- - | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 | SW 10 - 20 | SW 10 - 20 | --- - | SW 10 - 20 |
| Thursday Morning | SSW 15 - 25 | SSW 5 - 15 | SSW 5 - 15 | --- - | SSW 5 - 15 |
| Thursday Afternoon | SSW 20 - 30 | SSW 15 - 25 | SSW 10 - 20 | --- - | SSW 10 - 20 |
| Thursday Evening | SSW 25 - 35 | SSE 20 - 30 | SSE 20 - 30 | --- - | SSE 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Mid-day | SW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 |
| Thursday Morning | SSW 15 - 25 |
| Thursday Afternoon | SSW 20 - 30 |
| Thursday Evening | SSW 25 - 35 |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Mid-day | SSW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 |
| Thursday Morning | SSW 5 - 15 |
| Thursday Afternoon | SSW 15 - 25 |
| Thursday Evening | SSE 20 - 30 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Mid-day | SSW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 |
| Thursday Morning | SSW 5 - 15 |
| Thursday Afternoon | SSW 10 - 20 |
| Thursday Evening | SSE 20 - 30 |
| Mt. Rainier | Elevation |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Mid-day | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Evening | --- - |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning | SW 20 - 30 |
| Wednesday Mid-day | SW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 |
| Thursday Morning | SSW 5 - 15 |
| Thursday Afternoon | SSW 10 - 20 |
| Thursday Evening | SSE 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Mid-day | SW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 |
| Thursday Morning | SSW 15 - 25 |
| Thursday Afternoon | SSW 20 - 30 |
| Thursday Evening | SSW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Mid-day | SSW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 |
| Thursday Morning | SSW 5 - 15 |
| Thursday Afternoon | SSW 15 - 25 |
| Thursday Evening | SSE 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 20 - 30 |
| Wednesday Mid-day | SSW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 |
| Thursday Morning | SSW 5 - 15 |
| Thursday Afternoon | SSW 10 - 20 |
| Thursday Evening | SSE 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Mid-day | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Evening | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Morning | SW 20 - 30 |
| Wednesday Mid-day | SW 15 - 25 |
| Wednesday Afternoon | SW 20 - 30 |
| Wednesday Night | SW 10 - 20 |
| Thursday Morning | SSW 5 - 15 |
| Thursday Afternoon | SSW 10 - 20 |
| Thursday Evening | SSE 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Wednesday Morning | SSW 30 - 45 | SSW 30 - 45 | SSW 40 - 60 | --- - | SSW 40 - 60 |
| Wednesday Mid-day | SSW 35 - 50 | SSW 30 - 45 | SSW 35 - 50 | --- - | SSW 35 - 50 |
| Wednesday Afternoon | SW 30 - 45 | SW 30 - 45 | SW 30 - 45 | --- - | SW 30 - 45 |
| Wednesday Night | WSW 20 - 30 | WSW 10 - 20 | W 20 - 30 | --- - | W 20 - 30 |
| Thursday Morning | SW 10 - 20 | SW 10 - 20 | SW 10 - 20 | --- - | SW 15 - 25 |
| Thursday Afternoon | SSW 25 - 35 | SSW 20 - 30 | SSW 25 - 35 | --- - | SSW 30 - 45 |
| Thursday Night | SSW 40 - 60 | SSW 30 - 45 | SSW 40 - 60 | --- - | SSW 50 - 70 |
| Mt. Baker | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 30 - 45 |
| Wednesday Mid-day | SSW 35 - 50 |
| Wednesday Afternoon | SW 30 - 45 |
| Wednesday Night | WSW 20 - 30 |
| Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | SSW 25 - 35 |
| Thursday Night | SSW 40 - 60 |
| Washington Pass | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 30 - 45 |
| Wednesday Mid-day | SSW 30 - 45 |
| Wednesday Afternoon | SW 30 - 45 |
| Wednesday Night | WSW 10 - 20 |
| Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | SSW 20 - 30 |
| Thursday Night | SSW 30 - 45 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 40 - 60 |
| Wednesday Mid-day | SSW 35 - 50 |
| Wednesday Afternoon | SW 30 - 45 |
| Wednesday Night | W 20 - 30 |
| Thursday Morning | SW 10 - 20 |
| Thursday Afternoon | SSW 25 - 35 |
| Thursday Night | SSW 40 - 60 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Wednesday Morning | --- - |
| Wednesday Mid-day | --- - |
| Wednesday Afternoon | --- - |
| Wednesday Night | --- - |
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Wednesday Morning | SSW 40 - 60 |
| Wednesday Mid-day | SSW 35 - 50 |
| Wednesday Afternoon | SW 30 - 45 |
| Wednesday Night | W 20 - 30 |
| Thursday Morning | SW 15 - 25 |
| Thursday Afternoon | SSW 30 - 45 |
| Thursday Night | SSW 50 - 70 |
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 19, 2017
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