Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Monday night through Thursday
A weak low pressure system is diving south into California, clipping Mt. Hood with light snow and rain this afternoon but leaving Washington State dry. High clouds from the system have rotated as far north as the south Washington Cascades. Weak easterly flow through the Cascade Passes has pulled low clouds through from the east side on an otherwise fair weather day.
A broad area of high pressure will build offshore overnight and quickly shift over the Pacific Northwest on Christmas Day. Generally dry and cool conditions are expected. A few high clouds from the next Pacific frontal system may reach the Olympics in the afternoon but precipitation should hold off until Wednesday morning. A deep low in Gulf of Alaska will curl north and the front will split as it passes inland Wednesday afternoon.
Weather Forecast
Hurricane Ridge
| Monday Night | Mostly clear. |
| Tuesday | Mostly sunny, increasing high clouds late. |
Mt. Baker
| Monday Night | Mostly clear. |
| Tuesday | Mostly sunny. |
Washington Pass and Leavenworth
| Monday Night | Valley and low elevation clouds, otherwise mostly clear. |
| Tuesday | Valley and low elevation clouds, otherwise mostly sunny. |
Stevens and Snoqualmie Pass
| Monday Night | Areas of low clouds, otherwise mostly clear. Variable wind in the Passes. |
| Tuesday | Areas of low clouds, otherwise mostly sunny. Light west wind in the Passes. |
Mt. Rainier, Crystal and White Pass
| Monday Night | Mostly cloudy with high clouds in the evening, then mostly clear. |
| Tuesday | Mostly sunny. |
Mt. Hood
| Monday Night | Cloudy with periods of light rain and snow in the evening, then mostly cloudy. |
| Tuesday | Mostly cloudy in the morning becoming mostly sunny. |
Issued: 2:30 PM PST Monday, December 24, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Evening | Snow Level | 2500' | 2500' | 1500' | 1500' | 1500' | 1500' | 2500' | 3500' |
| Monday Night | Snow Level | 1500' | 1000' | 0' | 0' | 500' | 500' | 1000' | 2000' |
| Tuesday Morning | Freezing Level | 2000' | 1000' | 0' | 0' | 1000' | 500' | 1500' | 2000' |
| Tuesday Afternoon | Freezing Level | 3000' | 2000' | 2500' | 2000' | 2000' | 2500' | 3000' | 3000' |
| Tuesday Evening | Freezing Level | 2500' | 1500' | 500' | 1000' | 1000' | 1000' | 2000' | 2500' |
| Tuesday Night | Freezing Level | 2500' | 1500' | 500' | 1000' | 1000' | 1000' | 2000' | 2500' |
| Wednesday Morning | Snow Level * | 2000' | 1000' | 0' | 500' | 1000' | 1500' | 2000' | 2000' |
| Wednesday Afternoon | Snow Level * | 3000' | 1500' | 1000' | 1000' | 1500' | 1500' | 2500' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Snow Level 2500' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Freezing Level 2000' |
| Tuesday Afternoon |
Freezing Level 3000' |
| Tuesday Evening |
Freezing Level 2500' |
| Tuesday Night |
Freezing Level 2500' |
| Wednesday Morning |
Snow Level 2000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Snow Level 2500' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Freezing Level 1000' |
| Tuesday Afternoon |
Freezing Level 2000' |
| Tuesday Evening |
Freezing Level 1500' |
| Tuesday Night |
Freezing Level 1500' |
| Wednesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 0' |
| Tuesday Morning |
Freezing Level 0' |
| Tuesday Afternoon |
Freezing Level 2500' |
| Tuesday Evening |
Freezing Level 500' |
| Tuesday Night |
Freezing Level 500' |
| Wednesday Morning |
Snow Level 0' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 0' |
| Tuesday Morning |
Freezing Level 0' |
| Tuesday Afternoon |
Freezing Level 2000' |
| Tuesday Evening |
Freezing Level 1000' |
| Tuesday Night |
Freezing Level 1000' |
| Wednesday Morning |
Snow Level 500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 500' |
| Tuesday Morning |
Freezing Level 1000' |
| Tuesday Afternoon |
Freezing Level 2000' |
| Tuesday Evening |
Freezing Level 1000' |
| Tuesday Night |
Freezing Level 1000' |
| Wednesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 500' |
| Tuesday Morning |
Freezing Level 500' |
| Tuesday Afternoon |
Freezing Level 2500' |
| Tuesday Evening |
Freezing Level 1000' |
| Tuesday Night |
Freezing Level 1000' |
| Wednesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Snow Level 2500' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Freezing Level 1500' |
| Tuesday Afternoon |
Freezing Level 3000' |
| Tuesday Evening |
Freezing Level 2000' |
| Tuesday Night |
Freezing Level 2000' |
| Wednesday Morning |
Snow Level 2000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 2500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Snow Level 3500' |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Freezing Level 2000' |
| Tuesday Afternoon |
Freezing Level 3000' |
| Tuesday Evening |
Freezing Level 2500' |
| Tuesday Night |
Freezing Level 2500' |
| Wednesday Morning |
Snow Level 2000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 3000' (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
| Monday Night | Thursday | Thursday Night | Thursday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | LT 0.10 | 0.25 |
| Mt Baker Ski Area | 0 | 0 | 0 | 0.50 |
| Washington Pass | 0 | 0 | 0 | LT 0.10 |
| Leavenworth | 0 | 0 | 0 | LT 0.10 |
| Stevens Pass | 0 | 0 | 0 | 0.25 |
| Snoqualmie Pass | 0 | 0 | 0 | 0.25 |
| Mission Ridge | 0 | 0 | 0 | LT 0.10 |
| Crystal Mt | 0 | 0 | 0 | LT 0.25 |
| Paradise | 0 | 0 | 0 | 0.25 - 0.50 |
| White Pass | 0 | 0 | 0 | LT 0.25 |
| Mt Hood Meadows | LT 0.10 | 0 | 0 | LT 0.25 |
| Timberline | LT 0.10 | 0 | 0 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | LT 0.10 |
| Thursday | 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.50 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0.25 - 0.50 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | LT 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 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: 2:30 PM PST Monday, December 24, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | NNW 5 - 15 | N 0 - 10 | NW 0 - 10 | N 0 - 10 | NE 5 - 15 |
| Monday Night | NW 0 - 10 | NW 0 - 10 | NW 5 - 15 | NW 5 - 15 | NW 0 - 10 |
| Tuesday Morning | NW 5 - 15 | W 0 - 10 | NW 5 - 15 | NW 0 - 10 | NW 5 - 15 |
| Tuesday Afternoon | W 0 - 10 | VAR 0 - 10 | WNW 0 - 10 | WNW 0 - 10 | W 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | NNW 5 - 15 |
| Monday Night | NW 0 - 10 |
| Tuesday Morning | NW 5 - 15 |
| Tuesday Afternoon | W 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | N 0 - 10 |
| Monday Night | NW 0 - 10 |
| Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | NW 0 - 10 |
| Monday Night | NW 5 - 15 |
| Tuesday Morning | NW 5 - 15 |
| Tuesday Afternoon | WNW 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | N 0 - 10 |
| Monday Night | NW 5 - 15 |
| Tuesday Morning | NW 0 - 10 |
| Tuesday Afternoon | WNW 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | NE 5 - 15 |
| Monday Night | NW 0 - 10 |
| Tuesday Morning | NW 5 - 15 |
| Tuesday Afternoon | W 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | NNW 5 - 15 |
| Monday Night | NW 0 - 10 |
| Tuesday Morning | NW 5 - 15 |
| Tuesday Afternoon | W 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | N 0 - 10 |
| Monday Night | NW 0 - 10 |
| Tuesday Morning | W 0 - 10 |
| Tuesday Afternoon | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 0 - 10 |
| Monday Night | NW 5 - 15 |
| Tuesday Morning | NW 5 - 15 |
| Tuesday Afternoon | WNW 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | N 0 - 10 |
| Monday Night | NW 5 - 15 |
| Tuesday Morning | NW 0 - 10 |
| Tuesday Afternoon | WNW 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | NE 5 - 15 |
| Monday Night | NW 0 - 10 |
| Tuesday Morning | NW 5 - 15 |
| Tuesday 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 | |
|---|---|---|---|---|---|
| Monday Evening | NW 5 - 15 | NW 0 - 10 | NW 5 - 15 | NW 0 - 10 | NW 0 - 10 |
| Monday Night | NW 5 - 15 | NW 5 - 15 | NW 10 - 20 | NW 10 - 20 | NW 10 - 20 |
| Tuesday Morning | NW 5 - 15 | NW 5 - 15 | NW 15 - 25 | NW 10 - 20 | NW 10 - 20 |
| Tuesday Afternoon | NW 5 - 15 | NW 5 - 15 | NW 15 - 25 | NW 15 - 25 | NW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | NW 5 - 15 |
| Monday Night | NW 5 - 15 |
| Tuesday Morning | NW 5 - 15 |
| Tuesday Afternoon | NW 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 0 - 10 |
| Monday Night | NW 5 - 15 |
| Tuesday Morning | NW 5 - 15 |
| Tuesday Afternoon | NW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 5 - 15 |
| Monday Night | NW 10 - 20 |
| Tuesday Morning | NW 15 - 25 |
| Tuesday Afternoon | NW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | NW 0 - 10 |
| Monday Night | NW 10 - 20 |
| Tuesday Morning | NW 10 - 20 |
| Tuesday Afternoon | NW 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | NW 0 - 10 |
| Monday Night | NW 10 - 20 |
| Tuesday Morning | NW 10 - 20 |
| Tuesday Afternoon | NW 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: 2:30 PM PST Monday, December 24, 2018
Extended Weather Synopsis for Thursday night through Thursday
A secondary shortwave trailing the initial frontal passage should provide an extra oomph of snow to the south Washington Cascades and Mt. Hood Wednesday night. Showers will decrease everywhere late Wednesday night through Thursday morning. A strong ridge of high pressure will build offshore Thursday for mostly dry conditions. N-NW flow may trap moisture along the west slopes of the Cascades, making for a cloudier west slopes forecast. Warm frontal moisture will begin to tamp down the ridge on late Thursday night and Friday, with some precipitation spilling over the top into the Olympics and north Cascades by Friday afternoon. Snow levels will remain on the cool side, with just a slight warming trend forecast at the end of the week.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Snow Level | 500' - 1500' | 1500' - 2500' | 2500' - 3500' | |
| Thursday | Freezing Level | 1500' - 2500' | 2000' - 3000' | 2500' - 3500' | |
| Thursday Night | Freezing Level | 500' - 1500' | 1000' - 2000' | 1500' - 2500' | |
| Friday | Snow Level | 1000' - 2000' | 1500' - 2500' | 2000' - 3000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Snow Level 500' - 1500' |
| Thursday |
Freezing Level 1500' - 2500' |
| Thursday Night |
Freezing Level 500' - 1500' |
| Friday |
Snow Level 1000' - 2000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Snow Level 1500' - 2500' |
| Thursday |
Freezing Level 2000' - 3000' |
| Thursday Night |
Freezing Level 1000' - 2000' |
| Friday |
Snow Level 1500' - 2500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Snow Level 2500' - 3500' |
| Thursday |
Freezing Level 2500' - 3500' |
| Thursday Night |
Freezing Level 1500' - 2500' |
| Friday |
Snow Level 2000' - 3000' |
* 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 Dec 24, 2018
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