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 & 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 was 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 Afternoon - 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. |
East slopes of the Washington Cascades
| Thursday Afternoon - Thursday Night |
Partly cloudy to mostly cloudy with low clouds 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. |
Mt. Hood Area
| 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. |
Issued: 2:22 PM 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 Afternoon | Freezing Level | 4500' | 4000' | 3000' | ' | ' | 4000' | ' | 4500' |
| Thursday Night - Friday Morning | Freezing Level | 4000' | 3000' | 1500' | ' | ' | 2500' | ' | 3500' |
| Friday Afternoon - Friday Night | Freezing Level * | 6000' | 4500' | 4000' | ' | ' | 5500' | ' | 6500' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Afternoon |
Freezing Level 4500' |
| Thursday Night - Friday Morning |
Freezing Level 4000' |
| Friday Afternoon - Friday Night |
Freezing Level 6000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Thursday Afternoon |
Freezing Level 4000' |
| Thursday Night - Friday Morning |
Freezing Level 3000' |
| Friday Afternoon - Friday Night |
Freezing Level 4500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Thursday Afternoon |
Freezing Level 3000' |
| Thursday Night - Friday Morning |
Freezing Level 1500' |
| Friday Afternoon - Friday Night |
Freezing Level 4000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Thursday Afternoon |
Freezing Level ' |
| Thursday Night - Friday Morning |
Freezing Level ' |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Thursday Afternoon |
Freezing Level ' |
| Thursday Night - Friday Morning |
Freezing Level ' |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Afternoon |
Freezing Level 4000' |
| Thursday Night - Friday Morning |
Freezing Level 2500' |
| Friday Afternoon - Friday Night |
Freezing Level 5500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Afternoon |
Freezing Level ' |
| Thursday Night - Friday Morning |
Freezing Level ' |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Thursday Afternoon |
Freezing Level 4500' |
| 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: 2:22 PM 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 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 Afternoon | W 5 - 15 |
| Thursday Night - Friday Morning | W 15 - 25 |
| Friday Afternoon - Friday Night | W 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| 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 Afternoon | NW 5 - 15 |
| Thursday Night - Friday Morning | W 15 - 25 |
| Friday Afternoon - Friday Night | W 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Afternoon | --- - |
| Thursday Night - Friday Morning | --- - |
| Friday Afternoon - Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| 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.
Issued: 2:22 PM PST Thursday, January 26, 2017
Extended Weather Synopsis for Tuesday night through Tuesday
The upper level ridge will amplify over the region on Saturday, pushing the storm track north with a mostly sunny and mild January day on tap. However, offshore flow should create locally cooler conditions near the Cascade Passes and down at Mt. Hood for areas exposed to east winds. We aren't pulling arctic air over from eastern Washington and Oregon, so temperature inversions should not be as steep as seen earlier this month.
A weak frontal system coming down from the NW should reach the Olympics and Cascades Sunday aftenroon with increasing clouds elsewhere. Winds should increase Sunday in advance of this system. The frontal system does not look like a wet system and blows through quickly Sunday night with scattered showers and lower snow levels for Monday.
Extended Weather
Olympics, Washington Cascades and Mt. Hood
Mostly sunny and mild. Cooler Cascade Passes and Mt. Hood in areas exposed to east winds.
Mostly clear.
Increasing clouds Olympics and north Cascades with light rain and snow developing in the afternoon. Partly to mostly cloudy south Washington Cascades and mostly sunny Mt. Hood. Winds increasing in the afternoon.
Light rain and snow overnight becoming mostly cloudy with scattered light rain and snow showers Monday. Cooling trend.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Saturday - Sunday Morning | Freezing Level | 7000' - 8000' | 7500' - 8500' | 8500' - 9500' | * |
| Sunday Afternoon - Sunday Night | Snow Level | 4500' - 5500' | 4000' - 5000' | 6000' - 7000' | |
| Monday | Snow Level | 1500' - 2500' | 2500' - 3500' | 4500' - 5500' |
| Mt. Baker | Elevation |
|---|---|
| Saturday - Sunday Morning |
Freezing Level 7000' - 8000' (Easterly Flow *) |
| Sunday Afternoon - Sunday Night |
Snow Level 4500' - 5500' |
| Monday |
Snow Level 1500' - 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday - Sunday Morning |
Freezing Level 7500' - 8500' (Easterly Flow *) |
| Sunday Afternoon - Sunday Night |
Snow Level 4000' - 5000' |
| Monday |
Snow Level 2500' - 3500' |
| Mt. Hood | Elevation |
|---|---|
| Saturday - Sunday Morning |
Freezing Level 8500' - 9500' (Easterly Flow *) |
| Sunday Afternoon - Sunday Night |
Snow Level 6000' - 7000' |
| Monday |
Snow Level 4500' - 5500' |
* 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 Jan 26, 2017
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