Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Tuesday night through Tuesday
A deep trough has brought a modified arctic air mass over the region keeping temperatures below seasonal norms throughout the forecast period. By Tuesday night, the trough has shifted to the east, leaving the Pacific Northwest in a dry and light northerly flow. Fraser River outflow continues to spill arctic air into the Puget Sound lowlands. Temperatures will drop to well below freezing throughout the region under clear skies and strong radiational cooling, with light winds. Isolated fog is most likely near lakes and water sources. Temperatures are likely to fall below zero in parts of the Methow Valley.
On Wednesday, the air mass will remain cooler than average but will moderate slightly with calm to light winds and mostly sunny skies. Wednesday night, temperatures will cool quickly under clear skies and with calm to light winds. A light easterly flow will develop through the passes.
On Thursday, light crest-level winds will shift southerly as a cutoff low bypasses our region from north to south, some 500-600 miles of the coast of Oregon. Temperatures will be slightly warmer than Wednesday due to low-level southerly flow. Light easterly flow continues through the passes.
Weather Forecast
Hurricane Ridge
| Tuesday Night | Clear and cold. Isolated low-elevation fog. Light winds. |
| Wednesday | Sunny and cool. Isolated low-elevation morning fog. Calm to light winds. |
Mt. Baker
| Tuesday Night | Clear and cold. Isolated low-elevation fog. Light winds. |
| Wednesday | Sunny and cool. Isolated low-elevation morning fog. Calm to light winds. |
Washington Pass and Leavenworth
| Tuesday Night | Clear and very cold. Isolated low-elevation fog. Light winds. |
| Wednesday | Sunny and cool. Isolated low-elevation morning fog. Calm to light winds. |
Stevens and Snoqualmie Pass
| Tuesday Night | Clear and cold. Isolated low-elevation fog. Light crest-level and westerly pass-level winds. |
| Wednesday | Sunny and cool. Isolated low-elevation morning fog. Calm to light winds and westerly pass-level winds. |
Mt. Rainier, Crystal and White Pass
| Tuesday Night | Clear and cold. Isolated low-elevation fog. Light winds. |
| Wednesday | Sunny and cool. Isolated low-elevation morning fog. Calm to light winds. |
Mt. Hood
| Tuesday Night | Clear and cold. Isolated low-elevation fog. Light winds with occasional moderate gusts. |
| Wednesday | Sunny and cool. Isolated low-elevation morning fog. Calm to light winds. |
Issued: 2:31 PM PST Tuesday, February 5, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Tuesday Evening | Freezing Level | 500' | 500' | 500' | 1000' | 1000' | 500' | 1000' | 1000' |
| Tuesday Night | Freezing Level | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 500' |
| Wednesday Morning | Freezing Level | 500' | 500' | 500' | 500' | 500' | 500' | 500' | 500' |
| Wednesday Afternoon | Freezing Level | 1000' | 1000' | 1000' | 1000' | 1000' | 1000' | 1500' | 1500' |
| Wednesday Evening | Freezing Level * | 1000' | 500' | 1000' | 1000' | 1000' | 1000' | 1000' | 1500' |
| Wednesday Night | Freezing Level * | 500' | 500' | 500' | 500' | 500' | 500' | 500' | 500' |
| Thursday Morning | Freezing Level * | 500' | 500' | 500' | 500' | 500' | 500' | 500' | 500' |
| Thursday Afternoon | Freezing Level * | 1500' | 1500' | 1500' | 1000' | 1500' | 1500' | 2000' | 1500' |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Evening |
Freezing Level 500' |
| Tuesday Night |
Freezing Level 0' |
| Wednesday Morning |
Freezing Level 500' |
| Wednesday Afternoon |
Freezing Level 1000' |
| Wednesday Evening |
Freezing Level 1000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
| Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
| Thursday Afternoon |
Freezing Level 1500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Evening |
Freezing Level 500' |
| Tuesday Night |
Freezing Level 0' |
| Wednesday Morning |
Freezing Level 500' |
| Wednesday Afternoon |
Freezing Level 1000' |
| Wednesday Evening |
Freezing Level 500' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
| Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
| Thursday Afternoon |
Freezing Level 1500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Tuesday Evening |
Freezing Level 500' |
| Tuesday Night |
Freezing Level 0' |
| Wednesday Morning |
Freezing Level 500' |
| Wednesday Afternoon |
Freezing Level 1000' |
| Wednesday Evening |
Freezing Level 1000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
| Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
| Thursday Afternoon |
Freezing Level 1500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Tuesday Evening |
Freezing Level 1000' |
| Tuesday Night |
Freezing Level 0' |
| Wednesday Morning |
Freezing Level 500' |
| Wednesday Afternoon |
Freezing Level 1000' |
| Wednesday Evening |
Freezing Level 1000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
| Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
| Thursday Afternoon |
Freezing Level 1000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Tuesday Evening |
Freezing Level 1000' |
| Tuesday Night |
Freezing Level 0' |
| Wednesday Morning |
Freezing Level 500' |
| Wednesday Afternoon |
Freezing Level 1000' |
| Wednesday Evening |
Freezing Level 1000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
| Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
| Thursday Afternoon |
Freezing Level 1500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Evening |
Freezing Level 500' |
| Tuesday Night |
Freezing Level 0' |
| Wednesday Morning |
Freezing Level 500' |
| Wednesday Afternoon |
Freezing Level 1000' |
| Wednesday Evening |
Freezing Level 1000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
| Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
| Thursday Afternoon |
Freezing Level 1500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Tuesday Evening |
Freezing Level 1000' |
| Tuesday Night |
Freezing Level 0' |
| Wednesday Morning |
Freezing Level 500' |
| Wednesday Afternoon |
Freezing Level 1500' |
| Wednesday Evening |
Freezing Level 1000' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
| Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
| Thursday Afternoon |
Freezing Level 2000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Evening |
Freezing Level 1000' |
| Tuesday Night |
Freezing Level 500' |
| Wednesday Morning |
Freezing Level 500' |
| Wednesday Afternoon |
Freezing Level 1500' |
| Wednesday Evening |
Freezing Level 1500' (Easterly Flow *) |
| Wednesday Night |
Freezing Level 500' (Easterly Flow *) |
| Thursday Morning |
Freezing Level 500' (Easterly Flow *) |
| Thursday Afternoon |
Freezing Level 1500' (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 Night | Tuesday | Tuesday Night | Tuesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | 0 | 0 |
| Mt Baker Ski Area | 0 | 0 | 0 | 0 |
| Washington Pass | 0 | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | 0 | 0 |
| Snoqualmie Pass | 0 | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | 0 | 0 | 0 | 0 |
| Paradise | 0 | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | 0 | 0 | 0 |
| Timberline | 0 | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Tuesday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
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: 2:31 PM PST Tuesday, February 5, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Tuesday Evening | N 5 - 15 | NE 5 - 15 | W 5 - 15 | W 5 - 15 | W 5 - 15 |
| Tuesday Night | NNW 5 - 15 | NNE 5 - 15 | W 5 - 15 | W 5 - 15 | W 10 - 20 |
| Wednesday Morning | N 0 - 10 | NE 0 - 10 | W 0 - 10 | W 0 - 10 | W 5 - 15 |
| Wednesday Afternoon | W 0 - 10 | VAR 0 - 10 | W 5 - 15 | WNW 5 - 15 | W 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Tuesday Evening | N 5 - 15 |
| Tuesday Night | NNW 5 - 15 |
| Wednesday Morning | N 0 - 10 |
| Wednesday Afternoon | W 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Evening | NE 5 - 15 |
| Tuesday Night | NNE 5 - 15 |
| Wednesday Morning | NE 0 - 10 |
| Wednesday Afternoon | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Evening | W 5 - 15 |
| Tuesday Night | W 5 - 15 |
| Wednesday Morning | W 0 - 10 |
| Wednesday Afternoon | W 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Tuesday Evening | W 5 - 15 |
| Tuesday Night | W 5 - 15 |
| Wednesday Morning | W 0 - 10 |
| Wednesday Afternoon | WNW 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Evening | W 5 - 15 |
| Tuesday Night | W 10 - 20 |
| Wednesday Morning | W 5 - 15 |
| Wednesday Afternoon | W 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Tuesday Evening | N 5 - 15 |
| Tuesday Night | NNW 5 - 15 |
| Wednesday Morning | N 0 - 10 |
| Wednesday Afternoon | W 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Evening | NE 5 - 15 |
| Tuesday Night | NNE 5 - 15 |
| Wednesday Morning | NE 0 - 10 |
| Wednesday Afternoon | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Evening | W 5 - 15 |
| Tuesday Night | W 5 - 15 |
| Wednesday Morning | W 0 - 10 |
| Wednesday Afternoon | W 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Evening | W 5 - 15 |
| Tuesday Night | W 5 - 15 |
| Wednesday Morning | W 0 - 10 |
| Wednesday Afternoon | WNW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Evening | W 5 - 15 |
| Tuesday Night | W 10 - 20 |
| Wednesday Morning | W 5 - 15 |
| Wednesday Afternoon | W 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 | |
|---|---|---|---|---|---|
| Tuesday Evening | NNW 20 - 30 | NNW 25 - 35 | NNW 20 - 30 | NNW 20 - 30 | NNW 20 - 30 |
| Tuesday Night | NNW 25 - 35 | NNW 35 - 50 | NNW 20 - 30 | NNW 25 - 35 | NNW 25 - 35 |
| Wednesday Morning | NNW 15 - 25 | NNW 30 - 45 | NNW 25 - 35 | NNW 30 - 45 | NNW 30 - 45 |
| Wednesday Afternoon | NW 10 - 20 | NW 20 - 30 | NNW 20 - 30 | NNW 20 - 30 | NNW 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Tuesday Evening | NNW 20 - 30 |
| Tuesday Night | NNW 25 - 35 |
| Wednesday Morning | NNW 15 - 25 |
| Wednesday Afternoon | NW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Tuesday Evening | NNW 25 - 35 |
| Tuesday Night | NNW 35 - 50 |
| Wednesday Morning | NNW 30 - 45 |
| Wednesday Afternoon | NW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Tuesday Evening | NNW 20 - 30 |
| Tuesday Night | NNW 20 - 30 |
| Wednesday Morning | NNW 25 - 35 |
| Wednesday Afternoon | NNW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Tuesday Evening | NNW 20 - 30 |
| Tuesday Night | NNW 25 - 35 |
| Wednesday Morning | NNW 30 - 45 |
| Wednesday Afternoon | NNW 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Tuesday Evening | NNW 20 - 30 |
| Tuesday Night | NNW 25 - 35 |
| Wednesday Morning | NNW 30 - 45 |
| Wednesday Afternoon | NNW 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.
Issued: 2:31 PM PST Tuesday, February 5, 2019
Extended Weather Synopsis for Tuesday night through Tuesday
Thursday night, a reinforcing surge of modified arctic air will move into the British Columbia interior with a leading band of light snowfall reaching the North Cascades around the early morning hours. Meanwhile, the cutoff low dropping toward California may spin some light snow up from the south into the Mt. Hood region.
As the modified arctic air mass reaches the coast on Friday, the associated cyclonic flow is expected to produce a low-pressure center that picks up Pacific moisture and spreads increasing light snowfall across our region (most likely including the Puget Sound lowlands where it may mix with rain). Easterly flow should increase through the passes.
The low very drifts very slowly southward, just off the Washington coastline Friday night and Saturday with moisture wrapping around the low, likely favoring locations east of the Cascade crest with continued light to moderate snow. The reinforcing shot of cold air should trickle its way into the region.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Thursday Night | Snow Level | 0' - 1000' | 0' - 1000' | 0' - 1500' | * |
| Friday | Snow Level | 0' - 1000' | 0' - 1000' | 500' - 1500' | * |
| Friday Night | Snow Level | 0' - 1000' | 0' - 1000' | 1000' - 2000' | * |
| Saturday | Snow Level | 0' - 1000' | 0' - 1000' | 500' - 1500' |
| Mt. Baker | Elevation |
|---|---|
| Thursday Night |
Snow Level 0' - 1000' (Easterly Flow *) |
| Friday |
Snow Level 0' - 1000' (Easterly Flow *) |
| Friday Night |
Snow Level 0' - 1000' (Easterly Flow *) |
| Saturday |
Snow Level 0' - 1000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Night |
Snow Level 0' - 1000' (Easterly Flow *) |
| Friday |
Snow Level 0' - 1000' (Easterly Flow *) |
| Friday Night |
Snow Level 0' - 1000' (Easterly Flow *) |
| Saturday |
Snow Level 0' - 1000' |
| Mt. Hood | Elevation |
|---|---|
| Thursday Night |
Snow Level 0' - 1500' (Easterly Flow *) |
| Friday |
Snow Level 500' - 1500' (Easterly Flow *) |
| Friday Night |
Snow Level 1000' - 2000' (Easterly Flow *) |
| Saturday |
Snow Level 500' - 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.
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 5, 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.