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 night through Saturday
The northern branch of the jet stream will take over tonight as an upper level trough upstream over British Columbia slides south toward our region. The surface reflection of the upper level trough will be a developing surface low pressure system off of Vancouver Island that slowly slides south off the Washington coastline tonight through Friday.
This will translate into light snow developing for the Olympics and north Cascades after midnight tonight, and light snow spreading south for all areas during the day. Snow may become moderate in the Hurricane Ridge area during the day on Friday.
Snow should increase for all areas Friday night as the low pressure system sets up off the south Washington Coast, rotating moisture up and over much colder air being drawn out from the interior of the British Columbia.
As the low continues to sag south along the coastline on Saturday, drier air should taper snow from north to south along the west slopes of the Cascades Saturday afternoon. Closer to the low pressure system, moderate snowfall should continue in the Mt. Hood region.
Upslope enhancement should also produce locally higher snow totals along the north slopes of the Olympics and in a broader area along the east slopes of the Cascades due to northerly and easterly winds respectively. Snowfall totals could stack up to 12-18 inches along the east slopes of the Cascades Friday night and Saturday for areas like Mission Ridge. A broad swath of moderate easterly winds should affect the Washington Cascades Saturday as well.
Throughout this period, cold temperatures will squeeze out high snowfall ratios from water amounts that would otherwise appear unimpressive.
Weather Forecast
Hurricane Ridge
| Thursday Night | Clouds lowering overnight. Light snow developing after midnight. |
| Friday | Light snow becoming occasionally moderate snow in the afternoon. |
Mt. Baker
| Thursday Night | Clouds lowering overnight. Light snow developing after midnight. |
| Friday | Light snow. |
Washington Pass and Leavenworth
| Thursday Night | Clouds slowly lowering overnight. Very light snow developing Washington Pass late. |
| Friday | Cloudy with light snow Washington Pass spreading south during the morning. |
Stevens and Snoqualmie Pass
| Thursday Night | Overcast. Clouds slowly lowering overnight. Light to moderate east winds at Pass level decreasing overnight. |
| Friday | Cloudy with light snow developing in the morning. Snow may occasionally become moderate late in the afternoon. Light and variable winds at Pass level. |
Mt. Rainier, Crystal and White Pass
| Thursday Night | Overcast. Clouds slowly lowering overnight. |
| Friday | Cloudy with light snow developing mid-day. |
Mt. Hood
| Thursday Night | Overcast. Clouds slowly lowering overnight. |
| Friday | Cloudy with periods of light snow. |
Issued: 2:15 PM PST Thursday, February 7, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Thursday Evening | Freezing Level * | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 0' |
| Thursday Night | Snow Level * | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 0' |
| Friday Morning | Snow Level | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 500' |
| Friday Afternoon | Snow Level | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 500' |
| Friday Evening | Snow Level * | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 500' |
| Friday Night | Snow Level * | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 0' |
| Saturday Morning | Snow Level * | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 0' |
| Saturday Afternoon | Snow Level * | 0' | 0' | 0' | 0' | 0' | 0' | 0' | 0' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 0' (Easterly Flow *) |
| Thursday Night |
Snow Level 0' (Easterly Flow *) |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 0' |
| Friday Evening |
Snow Level 0' (Easterly Flow *) |
| Friday Night |
Snow Level 0' (Easterly Flow *) |
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 0' (Easterly Flow *) |
| Thursday Night |
Snow Level 0' (Easterly Flow *) |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 0' |
| Friday Evening |
Snow Level 0' (Easterly Flow *) |
| Friday Night |
Snow Level 0' (Easterly Flow *) |
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 0' (Easterly Flow *) |
| Thursday Night |
Snow Level 0' (Easterly Flow *) |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 0' |
| Friday Evening |
Snow Level 0' (Easterly Flow *) |
| Friday Night |
Snow Level 0' (Easterly Flow *) |
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 0' (Easterly Flow *) |
| Thursday Night |
Snow Level 0' (Easterly Flow *) |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 0' |
| Friday Evening |
Snow Level 0' (Easterly Flow *) |
| Friday Night |
Snow Level 0' (Easterly Flow *) |
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 0' (Easterly Flow *) |
| Thursday Night |
Snow Level 0' (Easterly Flow *) |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 0' |
| Friday Evening |
Snow Level 0' (Easterly Flow *) |
| Friday Night |
Snow Level 0' (Easterly Flow *) |
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 0' (Easterly Flow *) |
| Thursday Night |
Snow Level 0' (Easterly Flow *) |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 0' |
| Friday Evening |
Snow Level 0' (Easterly Flow *) |
| Friday Night |
Snow Level 0' (Easterly Flow *) |
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 0' (Easterly Flow *) |
| Thursday Night |
Snow Level 0' (Easterly Flow *) |
| Friday Morning |
Snow Level 0' |
| Friday Afternoon |
Snow Level 0' |
| Friday Evening |
Snow Level 0' (Easterly Flow *) |
| Friday Night |
Snow Level 0' (Easterly Flow *) |
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 0' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening |
Freezing Level 0' (Easterly Flow *) |
| Thursday Night |
Snow Level 0' (Easterly Flow *) |
| Friday Morning |
Snow Level 500' |
| Friday Afternoon |
Snow Level 500' |
| Friday Evening |
Snow Level 500' (Easterly Flow *) |
| Friday Night |
Snow Level 0' (Easterly Flow *) |
| Saturday Morning |
Snow Level 0' (Easterly Flow *) |
| Saturday Afternoon |
Snow Level 0' (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
| Thursday Night | Saturday | Saturday Night | Saturday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | 0.25 - 0.50 | 0.25 | 0.25 - 0.50 |
| Mt Baker Ski Area | LT 0.10 | LT 0.25 | LT 0.25 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 | 0.25 | LT 0.25 |
| Leavenworth | 0 | LT 0.10 | 0.25 | 0.25 |
| Stevens Pass | 0 | LT 0.25 | 0.25 - 0.50 | 0.25 |
| Snoqualmie Pass | 0 | LT 0.25 | 0.25 - 0.50 | 0.25 |
| Mission Ridge | 0 | LT 0.10 | 0.25 | 0.50 |
| Crystal Mt | 0 | LT 0.10 | 0.25 - 0.50 | 0.25 |
| Paradise | 0 | LT 0.10 | 0.50 | 0.25 |
| White Pass | 0 | LT 0.10 | 0.25 - 0.50 | 0.25 |
| Mt Hood Meadows | 0 | LT 0.10 | 0.25 - 0.50 | 0.50 |
| Timberline | 0 | LT 0.10 | 0.50 | 0.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0.25 - 0.50 |
| Saturday Night | 0.25 |
| Saturday | 0.25 - 0.50 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.25 |
| Saturday Night | LT 0.25 |
| Saturday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 |
| Saturday | LT 0.25 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 |
| Saturday | 0.25 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.25 |
| Saturday Night | 0.25 - 0.50 |
| Saturday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.25 |
| Saturday Night | 0.25 - 0.50 |
| Saturday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 |
| Saturday | 0.50 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 - 0.50 |
| Saturday | 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.50 |
| Saturday | 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 - 0.50 |
| Saturday | 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 - 0.50 |
| Saturday | 0.50 |
| Timberline | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.50 |
| Saturday | 0.50 |
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: 2:15 PM PST Thursday, February 7, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Evening | W 0 - 10 | SW 0 - 10 | SE 0 - 10 | S 0 - 10 | SE 0 - 10 |
| Thursday Night | W 0 - 10 | VAR 0 - 10 | W 0 - 10 | WSW 0 - 10 | WSW 0 - 10 |
| Friday Morning | W 0 - 10 | NE 0 - 10 | VAR 0 - 10 | SW 0 - 10 | WSW 0 - 10 |
| Friday Afternoon | NE 10 - 20 | NE 0 - 10 | SE 5 - 15 | S 5 - 15 | WSW 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening | W 0 - 10 |
| Thursday Night | W 0 - 10 |
| Friday Morning | W 0 - 10 |
| Friday Afternoon | NE 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening | SW 0 - 10 |
| Thursday Night | VAR 0 - 10 |
| Friday Morning | NE 0 - 10 |
| Friday Afternoon | NE 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening | SE 0 - 10 |
| Thursday Night | W 0 - 10 |
| Friday Morning | VAR 0 - 10 |
| Friday Afternoon | SE 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday Evening | S 0 - 10 |
| Thursday Night | WSW 0 - 10 |
| Friday Morning | SW 0 - 10 |
| Friday Afternoon | S 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening | SE 0 - 10 |
| Thursday Night | WSW 0 - 10 |
| Friday Morning | WSW 0 - 10 |
| Friday Afternoon | WSW 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday Evening | W 0 - 10 |
| Thursday Night | W 0 - 10 |
| Friday Morning | W 0 - 10 |
| Friday Afternoon | NE 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | SW 0 - 10 |
| Thursday Night | VAR 0 - 10 |
| Friday Morning | NE 0 - 10 |
| Friday Afternoon | NE 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | SE 0 - 10 |
| Thursday Night | W 0 - 10 |
| Friday Morning | VAR 0 - 10 |
| Friday Afternoon | SE 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | S 0 - 10 |
| Thursday Night | WSW 0 - 10 |
| Friday Morning | SW 0 - 10 |
| Friday Afternoon | S 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | SE 0 - 10 |
| Thursday Night | WSW 0 - 10 |
| Friday Morning | WSW 0 - 10 |
| Friday Afternoon | WSW 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 Evening | W 10 - 20 | W 10 - 20 | W 10 - 20 | W 10 - 20 | SW 5 - 15 |
| Thursday Night | W 5 - 15 | W 5 - 15 | WNW 15 - 30 | WNW 10 - 20 | W 10 - 20 |
| Friday Morning | W 5 - 15 | W 0 - 10 | WNW 15 - 25 | W 10 - 20 | W 10 - 20 |
| Friday Afternoon | E 10 - 20 | E 5 - 15 | WSW 15 - 25 | W 15 - 25 | W 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | W 10 - 20 |
| Thursday Night | W 5 - 15 |
| Friday Morning | W 5 - 15 |
| Friday Afternoon | E 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday Evening | W 10 - 20 |
| Thursday Night | W 5 - 15 |
| Friday Morning | W 0 - 10 |
| Friday Afternoon | E 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | W 10 - 20 |
| Thursday Night | WNW 15 - 30 |
| Friday Morning | WNW 15 - 25 |
| Friday Afternoon | WSW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | W 10 - 20 |
| Thursday Night | WNW 10 - 20 |
| Friday Morning | W 10 - 20 |
| Friday Afternoon | W 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | SW 5 - 15 |
| Thursday Night | W 10 - 20 |
| Friday Morning | W 10 - 20 |
| Friday Afternoon | W 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: 2:15 PM PST Thursday, February 7, 2019
Extended Weather Synopsis for Saturday night through Saturday
Upslope snow showers will begin to taper down from north to south along the east slopes of the Cascades Saturday night. On Sunday, snow showers should become light and scattered across the region as the upper level trough moves into the Intermountain West.
Forecast models diverge sharply Sunday night and Monday. The latest GFS run brings a fast-moving but potent system into the region in NW flow aloft Sunday night and also leaves the door open for a steady succession of weather systems. The European model continues to show low pressure systems in northerly flow aloft developing a bit further off the coast, affecting Mt. Hood but largely bypassing Washington State. There is much higher confidence that cold air and low snow levels will remain firmly entrenched over the region for the next week or more.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Saturday Night | Snow Level | 0' - 0' | 0' - 0' | 0' - 0' | * |
| Sunday | Snow Level | 0' - 0' | 0' - 0' | 0' - 0' | |
| Sunday Night | Snow Level | 0' - 0' | 0' - 0' | 0' - 0' | * |
| Monday | Snow Level | 0' - 0' | 0' - 0' | 1000' - 2000' | * |
| Mt. Baker | Elevation |
|---|---|
| Saturday Night |
Snow Level 0' - 0' (Easterly Flow *) |
| Sunday |
Snow Level 0' - 0' |
| Sunday Night |
Snow Level 0' - 0' (Easterly Flow *) |
| Monday |
Snow Level 0' - 0' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Night |
Snow Level 0' - 0' (Easterly Flow *) |
| Sunday |
Snow Level 0' - 0' |
| Sunday Night |
Snow Level 0' - 0' (Easterly Flow *) |
| Monday |
Snow Level 0' - 0' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Night |
Snow Level 0' - 0' (Easterly Flow *) |
| Sunday |
Snow Level 0' - 0' |
| Sunday Night |
Snow Level 0' - 0' (Easterly Flow *) |
| Monday |
Snow Level 1000' - 2000' (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.
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 7, 2019
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