Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Wednesday night through Saturday
The Pacific Northwest sits near the western edge of a cool upper trough over the Western US. An amplified jetstream continues to bring NNW flow and instability snow showers primarily to the Oregon Cascades but also to southern Washington. The two features are combining to maintain below normal temperatures on Wednesday. A surface boundary will move southward from interior British Columbia, bringing drier air and cutting off shower activity during the evening hours.
Dry weather can be expected later Wednesday night through Friday night as a low amplitude high-pressure noses into the region.
Thursday night, clouds will increase ahead of a system diving southward along the British Columbia coastline with some light precipitation arriving in the Olympics and North Cascades by the early morning hours on Friday. Light to moderate snow will increase throughout the day with the front passing from NW to SE across the region during the afternoon hours on Friday. This system looks to be a repeat of the Tuesday through Tuesday night storm.
Below normal temperatures can be expected throughout the forecast period with snow levels well below pass level.
Weather Forecast
Hurricane Ridge
Wednesday Night | Partly clear then becoming mostly clear. Cool. Moderate winds. |
Thursday | Mostly sunny and cool. Light winds. |
Mt. Baker
Wednesday Night | Mostly clearing skies with fog lingering in the valleys. Cool. Light to moderate winds. |
Thursday | Mostly sunny and cool. Light winds. |
Washington Pass and Leavenworth
Wednesday Night | Some early snow showers from highway 2 southward, then mostly clearing skies with fog lingering in the valleys. Cool. Light to moderate winds. |
Thursday | Mostly sunny and cool. Light winds. |
Stevens and Snoqualmie Pass
Wednesday Night | Some early light snow showers from highway 2 southward, then mostly clearing skies with fog lingering in the valleys. Cool. Light to moderate winds. |
Thursday | Mostly sunny with some low cloud and fog possibly lingering. Cool. Light winds. |
Mt. Rainier, Crystal and White Pass
Wednesday Night | Some light snow showers possible in the early evening, then gradually clearing. Cool. Light winds. |
Thursday | Mostly sunny. Cool. Light winds. |
Mt. Hood
Wednesday Night | Some light snow showers possible in the early evening, then gradually clearing. Cool. Light winds. |
Thursday | Mostly sunny. Cool. Light winds. |
Issued: 2:34 PM PST Wednesday, February 20, 2019
Snow/Freezing Level (ft)
Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
---|---|---|---|---|---|---|---|---|---|
Wednesday Evening | Snow Level | 1000' | 1000' | 1000' | 1000' | 1000' | 1000' | 1000' | 1500' |
Wednesday Night | Freezing Level * | 1500' | 1000' | 500' | 1000' | 1000' | 1000' | 1000' | 1000' |
Thursday Morning | Freezing Level * | 1000' | 500' | 500' | 500' | 500' | 1000' | 1000' | 0' |
Thursday Afternoon | Freezing Level | 2000' | 1500' | 1500' | 2000' | 2000' | 2000' | 2500' | 2000' |
Thursday Evening | Freezing Level * | 2500' | 2000' | 2000' | 2000' | 2000' | 2000' | 2000' | 2000' |
Thursday Night | Freezing Level * | 2000' | 1000' | 500' | 500' | 1000' | 1000' | 1000' | 500' |
Friday Morning | Snow Level | 1500' | 0' | 0' | 0' | 0' | 0' | 500' | 0' |
Friday Afternoon | Snow Level | 1500' | 500' | 500' | 500' | 1000' | 1500' | 1500' | 1500' |
Hurricane Ridge | Elevation |
---|---|
Wednesday Evening |
Snow Level 1000' |
Wednesday Night |
Freezing Level 1500' (Easterly Flow *) |
Thursday Morning |
Freezing Level 1000' (Easterly Flow *) |
Thursday Afternoon |
Freezing Level 2000' |
Thursday Evening |
Freezing Level 2500' (Easterly Flow *) |
Thursday Night |
Freezing Level 2000' (Easterly Flow *) |
Friday Morning |
Snow Level 1500' |
Friday Afternoon |
Snow Level 1500' |
Mt. Baker | Elevation |
---|---|
Wednesday Evening |
Snow Level 1000' |
Wednesday Night |
Freezing Level 1000' (Easterly Flow *) |
Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
Thursday Afternoon |
Freezing Level 1500' |
Thursday Evening |
Freezing Level 2000' (Easterly Flow *) |
Thursday Night |
Freezing Level 1000' (Easterly Flow *) |
Friday Morning |
Snow Level 0' |
Friday Afternoon |
Snow Level 500' |
Washington Pass | Elevation |
---|---|
Wednesday Evening |
Snow Level 1000' |
Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
Thursday Afternoon |
Freezing Level 1500' |
Thursday Evening |
Freezing Level 2000' (Easterly Flow *) |
Thursday Night |
Freezing Level 500' (Easterly Flow *) |
Friday Morning |
Snow Level 0' |
Friday Afternoon |
Snow Level 500' |
Leavenworth | Elevation |
---|---|
Wednesday Evening |
Snow Level 1000' |
Wednesday Night |
Freezing Level 1000' (Easterly Flow *) |
Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
Thursday Afternoon |
Freezing Level 2000' |
Thursday Evening |
Freezing Level 2000' (Easterly Flow *) |
Thursday Night |
Freezing Level 500' (Easterly Flow *) |
Friday Morning |
Snow Level 0' |
Friday Afternoon |
Snow Level 500' |
Stevens Pass | Elevation |
---|---|
Wednesday Evening |
Snow Level 1000' |
Wednesday Night |
Freezing Level 1000' (Easterly Flow *) |
Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
Thursday Afternoon |
Freezing Level 2000' |
Thursday Evening |
Freezing Level 2000' (Easterly Flow *) |
Thursday Night |
Freezing Level 1000' (Easterly Flow *) |
Friday Morning |
Snow Level 0' |
Friday Afternoon |
Snow Level 1000' |
Snoqualmie Pass | Elevation |
---|---|
Wednesday Evening |
Snow Level 1000' |
Wednesday Night |
Freezing Level 1000' (Easterly Flow *) |
Thursday Morning |
Freezing Level 1000' (Easterly Flow *) |
Thursday Afternoon |
Freezing Level 2000' |
Thursday Evening |
Freezing Level 2000' (Easterly Flow *) |
Thursday Night |
Freezing Level 1000' (Easterly Flow *) |
Friday Morning |
Snow Level 0' |
Friday Afternoon |
Snow Level 1500' |
Mt. Rainier & Crystal | Elevation |
---|---|
Wednesday Evening |
Snow Level 1000' |
Wednesday Night |
Freezing Level 1000' (Easterly Flow *) |
Thursday Morning |
Freezing Level 1000' (Easterly Flow *) |
Thursday Afternoon |
Freezing Level 2500' |
Thursday Evening |
Freezing Level 2000' (Easterly Flow *) |
Thursday Night |
Freezing Level 1000' (Easterly Flow *) |
Friday Morning |
Snow Level 500' |
Friday Afternoon |
Snow Level 1500' |
Mt. Hood | Elevation |
---|---|
Wednesday Evening |
Snow Level 1500' |
Wednesday Night |
Freezing Level 1000' (Easterly Flow *) |
Thursday Morning |
Freezing Level 0' (Easterly Flow *) |
Thursday Afternoon |
Freezing Level 2000' |
Thursday Evening |
Freezing Level 2000' (Easterly Flow *) |
Thursday Night |
Freezing Level 500' (Easterly Flow *) |
Friday Morning |
Snow Level 0' |
Friday Afternoon |
Snow Level 1500' |
* 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
Wednesday Night | Saturday | Saturday Night | Saturday | |
---|---|---|---|---|
4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
Hurricane Ridge | 0 | 0 | 0 | LT 0.25 |
Mt Baker Ski Area | 0 | 0 | 0 | 0.50 |
Washington Pass | 0 | 0 | 0 | LT 0.25 |
Leavenworth | 0 | 0 | 0 | LT 0.25 |
Stevens Pass | LT 0.10 | 0 | 0 | 0.25 - 0.50 |
Snoqualmie Pass | LT 0.10 | 0 | 0 | 0.25 - 0.50 |
Mission Ridge | LT 0.10 | 0 | 0 | LT 0.25 |
Crystal Mt | LT 0.10 | 0 | 0 | LT 0.25 |
Paradise | 0.25 | 0 | 0 | 0.50 |
White Pass | LT 0.10 | 0 | 0 | 0.25 |
Mt Hood Meadows | LT 0.25 | 0 | 0 | LT 0.25 |
Timberline | LT 0.25 | 0 | 0 | LT 0.25 |
Hurricane Ridge | Precipitation Forecast |
---|---|
Wednesday Night | 0 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | LT 0.25 |
Mt Baker Ski Area | Precipitation Forecast |
---|---|
Wednesday Night | 0 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | 0.50 |
Washington Pass | Precipitation Forecast |
---|---|
Wednesday Night | 0 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | LT 0.25 |
Leavenworth | Precipitation Forecast |
---|---|
Wednesday Night | 0 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | LT 0.25 |
Stevens Pass | Precipitation Forecast |
---|---|
Wednesday Night | LT 0.10 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | 0.25 - 0.50 |
Snoqualmie Pass | Precipitation Forecast |
---|---|
Wednesday Night | LT 0.10 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | 0.25 - 0.50 |
Mission Ridge | Precipitation Forecast |
---|---|
Wednesday Night | LT 0.10 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | LT 0.25 |
Crystal Mt | Precipitation Forecast |
---|---|
Wednesday Night | LT 0.10 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | LT 0.25 |
Paradise | Precipitation Forecast |
---|---|
Wednesday Night | 0.25 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | 0.50 |
White Pass | Precipitation Forecast |
---|---|
Wednesday Night | LT 0.10 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | 0.25 |
Mt Hood Meadows | Precipitation Forecast |
---|---|
Wednesday Night | LT 0.25 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | LT 0.25 |
Timberline | Precipitation Forecast |
---|---|
Wednesday Night | LT 0.25 |
Saturday | 0 |
Saturday Night | 0 |
Saturday | LT 0.25 |
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: 2:34 PM PST Wednesday, February 20, 2019
Free Winds at 5000' (mph)
Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
---|---|---|---|---|---|
Wednesday Evening | NNE 10 - 20 | NNE 10 - 20 | ENE 0 - 10 | ENE 0 - 10 | ENE 0 - 10 |
Wednesday Night | N 10 - 20 | NE 10 - 20 | VAR 0 - 10 | ENE 0 - 10 | ENE 10 - 20 |
Thursday Morning | N 5 - 15 | NE 5 - 15 | E 0 - 10 | NE 0 - 10 | ENE 10 - 20 |
Thursday Afternoon | VAR 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | W 0 - 10 | ENE 5 - 15 |
Hurricane Ridge | Elevation |
---|---|
Wednesday Evening | NNE 10 - 20 |
Wednesday Night | N 10 - 20 |
Thursday Morning | N 5 - 15 |
Thursday Afternoon | VAR 0 - 10 |
Mt. Baker | Elevation |
---|---|
Wednesday Evening | NNE 10 - 20 |
Wednesday Night | NE 10 - 20 |
Thursday Morning | NE 5 - 15 |
Thursday Afternoon | VAR 0 - 10 |
Stevens and Snoqualmie Pass | Elevation |
---|---|
Wednesday Evening | ENE 0 - 10 |
Wednesday Night | VAR 0 - 10 |
Thursday Morning | E 0 - 10 |
Thursday Afternoon | VAR 0 - 10 |
Mt. Rainier | Elevation |
---|---|
Wednesday Evening | ENE 0 - 10 |
Wednesday Night | ENE 0 - 10 |
Thursday Morning | NE 0 - 10 |
Thursday Afternoon | W 0 - 10 |
Mt. Hood | Elevation |
---|---|
Wednesday Evening | ENE 0 - 10 |
Wednesday Night | ENE 10 - 20 |
Thursday Morning | ENE 10 - 20 |
Thursday Afternoon | ENE 5 - 15 |
Hurricane Ridge | Direction - Speed |
---|---|
Wednesday Evening | NNE 10 - 20 |
Wednesday Night | N 10 - 20 |
Thursday Morning | N 5 - 15 |
Thursday Afternoon | VAR 0 - 10 |
Mt. Baker | Direction - Speed |
---|---|
Wednesday Evening | NNE 10 - 20 |
Wednesday Night | NE 10 - 20 |
Thursday Morning | NE 5 - 15 |
Thursday Afternoon | VAR 0 - 10 |
Stevens and Snoqualmie Pass | Direction - Speed |
---|---|
Wednesday Evening | ENE 0 - 10 |
Wednesday Night | VAR 0 - 10 |
Thursday Morning | E 0 - 10 |
Thursday Afternoon | VAR 0 - 10 |
Mt. Rainier | Direction - Speed |
---|---|
Wednesday Evening | ENE 0 - 10 |
Wednesday Night | ENE 0 - 10 |
Thursday Morning | NE 0 - 10 |
Thursday Afternoon | W 0 - 10 |
Mt. Hood | Direction - Speed |
---|---|
Wednesday Evening | ENE 0 - 10 |
Wednesday Night | ENE 10 - 20 |
Thursday Morning | ENE 10 - 20 |
Thursday Afternoon | ENE 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.
Free Winds at 9000' (mph)
Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
---|---|---|---|---|---|
Wednesday Evening | NNE 20 - 30 | N 15 - 25 | N 5 - 15 | NE 5 - 15 | NE 15 - 25 |
Wednesday Night | NNE 15 - 25 | N 10 - 20 | N 5 - 15 | NNW 10 - 20 | N 15 - 25 |
Thursday Morning | N 10 - 20 | NNW 5 - 15 | N 10 - 20 | N 10 - 20 | N 15 - 25 |
Thursday Afternoon | W 5 - 15 | W 10 - 20 | NW 10 - 20 | NW 10 - 20 | N 15 - 25 |
Mt. Baker | Direction - Speed |
---|---|
Wednesday Evening | NNE 20 - 30 |
Wednesday Night | NNE 15 - 25 |
Thursday Morning | N 10 - 20 |
Thursday Afternoon | W 5 - 15 |
Washington Pass | Direction - Speed |
---|---|
Wednesday Evening | N 15 - 25 |
Wednesday Night | N 10 - 20 |
Thursday Morning | NNW 5 - 15 |
Thursday Afternoon | W 10 - 20 |
Stevens and Snoqualmie Pass | Direction - Speed |
---|---|
Wednesday Evening | N 5 - 15 |
Wednesday Night | N 5 - 15 |
Thursday Morning | N 10 - 20 |
Thursday Afternoon | NW 10 - 20 |
Mt. Rainier | Direction - Speed |
---|---|
Wednesday Evening | NE 5 - 15 |
Wednesday Night | NNW 10 - 20 |
Thursday Morning | N 10 - 20 |
Thursday Afternoon | NW 10 - 20 |
Mt. Hood | Direction - Speed |
---|---|
Wednesday Evening | NE 15 - 25 |
Wednesday Night | N 15 - 25 |
Thursday Morning | N 15 - 25 |
Thursday Afternoon | N 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.
Issued: 2:34 PM PST Wednesday, February 20, 2019
Extended Weather Synopsis for Saturday night through Saturday
Expect continued temperatures well below seasonal norms.
Friday night, post-frontal WNW flow is expected to bring light snow showers with heavier precipitation with well-defined convergence zones and heavier snow forecast for some areas. The upper trough will sit and spin near Vancouver Island through Saturday night, bringing instability snow showers and cool temperatures before moving onshore on Sunday. A frontal boundary will form over southern Oregon on Sunday with relatively clearing skies over Washington State as the Upper trough loses energy.
Extended Snow/Freezing Levels
Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
---|---|---|---|---|---|
Friday Night | Snow Level | 0' - 1000' | 500' - 1500' | 1000' - 2000' | |
Saturday | Snow Level | 0' - 1000' | 0' - 1000' | 1000' - 2000' | |
Saturday Night | Snow Level | 500' - 1500' | 0' - 1000' | 1000' - 2000' | |
Sunday | Snow Level | 0' - 1000' | 0' - 1000' | 1000' - 2000' |
Mt. Baker | Elevation |
---|---|
Friday Night |
Snow Level 0' - 1000' |
Saturday |
Snow Level 0' - 1000' |
Saturday Night |
Snow Level 500' - 1500' |
Sunday |
Snow Level 0' - 1000' |
Snoqualmie Pass | Elevation |
---|---|
Friday Night |
Snow Level 500' - 1500' |
Saturday |
Snow Level 0' - 1000' |
Saturday Night |
Snow Level 0' - 1000' |
Sunday |
Snow Level 0' - 1000' |
Mt. Hood | Elevation |
---|---|
Friday Night |
Snow Level 1000' - 2000' |
Saturday |
Snow Level 1000' - 2000' |
Saturday Night |
Snow Level 1000' - 2000' |
Sunday |
Snow Level 1000' - 2000' |
* 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 Feb 20, 2019
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.