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Weather Synopsis for Thursday & Tuesday
An upper level ridge currently centered offshore will slowly slide east toward the coast and inland over the next few days. Weak lift in northerly flow is still producing a few isolated showers this morning. The stratus deck over the region should begin to break up this afternoon, but a subsidence inversion due to high pressure building aloft over the area will likely trap moisture below crest level. A cloudy morning transitioning to mostly cloudy skies with afternoon sunbreaks seems likely. The upper portion of the volcanoes will likely be above the cloud deck.
A slow warming trend will begin today and continue on Friday. High clouds from warm frontal moisture directed into central British Columbia should move over the region on Friday, with decreasing cloud cover over the south Washington Cascades and Mt. Hood. The upper level ridge should amplify over the coast during the day on Friday, deflecting the storm track further north.
Weather Forecast
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Thursday Morning |
Cloudy with isolated showers. |
| Thursday Afternoon |
Mostly cloudy with sunbreaks. |
| Thursday Night |
Partly to mostly cloudy. |
| Friday |
Mostly cloudy north Cascades and Olympics with high clouds. Partly to mostly sunny south and central Cascades with periods of high clouds. Milder. |
| Friday Night |
Partly cloudy. |
Mt. Hood Area
| Thursday Morning |
Cloudy with isolated showers. |
| Thursday Afternoon |
Mostly cloudy with sunbreaks. |
| Thursday Night |
Partly cloudy. |
| Friday |
Mostly sunny with periods of high clouds mainly in the morning. Milder. |
| Friday Night |
Partly cloudy. |
East slopes of the Washington Cascades
| Thursday Morning |
Cloudy with isolated showers near the crest. |
| Thursday Afternoon |
Partly to mostly cloudy with sunbreaks. |
| Thursday Night |
Partly cloudy with low clouds developing along the lower east slopes. |
| Friday |
Partly to mostly cloudy northeast Cascades with high clouds. Partly to mostly sunny southeast and central-east Cascades with periods of high clouds. Areas of low clouds lower east slopes. Milder. |
| Friday Night |
Partly cloudy. |
Issued: 7:12 AM PST Thursday, January 26, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Thursday Morning | Snow Level | 3000' | 1000' | 500' | ' | ' | 2000' | ' | 2500' |
| Thursday Afternoon | Freezing Level | 4000' | 3500' | 3000' | ' | ' | 3500' | ' | 4000' |
| Thursday Night - Friday Morning | Freezing Level | 4000' | 3000' | 1500' | ' | ' | 2500' | ' | 3500' |
| Friday Afternoon - Friday Night | Freezing Level * | 6000' | 4500' | 4000' | ' | ' | 5000' | ' | 6500' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Morning |
Snow Level 3000' |
| Thursday Afternoon |
Freezing Level 4000' |
| Thursday Night - Friday Morning |
Freezing Level 4000' |
| Friday Afternoon - Friday Night |
Freezing Level 6000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Thursday Morning |
Snow Level 1000' |
| Thursday Afternoon |
Freezing Level 3500' |
| Thursday Night - Friday Morning |
Freezing Level 3000' |
| Friday Afternoon - Friday Night |
Freezing Level 4500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Thursday Morning |
Snow Level 500' |
| Thursday Afternoon |
Freezing Level 3000' |
| Thursday Night - Friday Morning |
Freezing Level 1500' |
| Friday Afternoon - Friday Night |
Freezing Level 4000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Thursday Morning |
Snow Level ' |
| Thursday Afternoon |
Freezing Level ' |
| Thursday Night - Friday Morning |
Freezing Level ' |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Thursday Morning |
Snow Level ' |
| Thursday Afternoon |
Freezing Level ' |
| Thursday Night - Friday Morning |
Freezing Level ' |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Morning |
Snow Level 2000' |
| Thursday Afternoon |
Freezing Level 3500' |
| Thursday Night - Friday Morning |
Freezing Level 2500' |
| Friday Afternoon - Friday Night |
Freezing Level 5000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Morning |
Snow Level ' |
| Thursday Afternoon |
Freezing Level ' |
| Thursday Night - Friday Morning |
Freezing Level ' |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Thursday Morning |
Snow Level 2500' |
| Thursday Afternoon |
Freezing Level 4000' |
| Thursday Night - Friday Morning |
Freezing Level 3500' |
| Friday Afternoon - Friday Night |
Freezing Level 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.
Precipitation Forecast
| Tuesday | Tuesday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | LT 0.10 |
| Snoqualmie Pass | LT 0.10 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | 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: 7:12 AM PST Thursday, January 26, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday - Thursday Night | SW 0 - 10 | W 0 - 10 | W 0 - 10 | --- - | W 0 - 10 |
| Friday - Friday Night | SW 5 - 15 | SW 0 - 10 | W 0 - 10 | --- - | VAR 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday - Thursday Night | SW 0 - 10 |
| Friday - Friday Night | SW 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Thursday - Thursday Night | W 0 - 10 |
| Friday - Friday Night | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday - Thursday Night | W 0 - 10 |
| Friday - Friday Night | W 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday - Thursday Night | --- - |
| Friday - Friday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Thursday - Thursday Night | W 0 - 10 |
| Friday - Friday Night | VAR 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday - Thursday Night | SW 0 - 10 |
| Friday - Friday Night | SW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday - Thursday Night | W 0 - 10 |
| Friday - Friday Night | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday - Thursday Night | W 0 - 10 |
| Friday - Friday Night | W 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday - Thursday Night | --- - |
| Friday - Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday - Thursday Night | W 0 - 10 |
| Friday - Friday Night | VAR 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Morning | NW 5 - 15 | N 5 - 15 | NW 10 - 20 | --- - | NW 10 - 20 |
| Thursday Afternoon | W 5 - 15 | NW 0 - 10 | NW 5 - 15 | --- - | N 0 - 10 |
| Thursday Night - Friday Morning | W 15 - 25 | W 10 - 20 | W 15 - 25 | --- - | W 5 - 15 |
| Friday Afternoon - Friday Night | W 20 - 30 | W 20 - 30 | W 20 - 30 | --- - | NW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Morning | NW 5 - 15 |
| Thursday Afternoon | W 5 - 15 |
| Thursday Night - Friday Morning | W 15 - 25 |
| Friday Afternoon - Friday Night | W 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday Morning | N 5 - 15 |
| Thursday Afternoon | NW 0 - 10 |
| Thursday Night - Friday Morning | W 10 - 20 |
| Friday Afternoon - Friday Night | W 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Morning | NW 10 - 20 |
| Thursday Afternoon | NW 5 - 15 |
| Thursday Night - Friday Morning | W 15 - 25 |
| Friday Afternoon - Friday Night | W 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Morning | --- - |
| Thursday Afternoon | --- - |
| Thursday Night - Friday Morning | --- - |
| Friday Afternoon - Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Morning | NW 10 - 20 |
| Thursday Afternoon | N 0 - 10 |
| Thursday Night - Friday Morning | W 5 - 15 |
| Friday Afternoon - Friday Night | NW 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Jan 25, 2017
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