Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Monday & Tuesday
Weak warm frontal moisture may squeeze out a few hundredths of precipitation mainly this morning along the west slopes of the Cascades, especially for Mt. Baker area. Areas further south such as the south Washington Cascades and Mt. Hood should see more in the way of sunshine. A big change in the weather pattern is on our doorstep as weak upper level ridging flattens today and tonight and allows a strong jet stream to begin driving Pacific frontal systems through our region.
This switch to a progressive weather pattern begins with warm frontal moisture arriving for the Olympics and north Cascades tonight and spreading south during the day on Tuesday. Warm air will be advected into the region, resulting in rising snow levels. The devil is in the details of course, and cool easterly flow through the Passes will keep precipitation frozen in the morning before snow levels skyrocket in the afternoon, earlier for White Pass, later in the day for Stevens Pass. A period of freezing rain is possible for White and Snoqualmie Passes tomorrow morning before the switch over. For the north Cascades and along the east slopes of the Cascades lower snow levels will hold through the daylight hours on Tuesday with a much slower warming trend anticipated. Heavier precipitation will hold off until Tuesday night for Mt. Hood.
West winds at crest-level will ramp up quickly in the afternoon for all areas. Expect stormy conditions by the end of the day Tuesday.
Weather Forecast
Hurricane Ridge
| Monday | Cloudy with periods of light rain or snow this morning becoming partly to mostly cloudy in the afternoon. |
Mt. Baker
| Monday | Cloudy with periods of light rain or snow this morning becoming mostly cloudy in the afternoon. |
Washington Pass and Leavenworth
| Monday | Cloudy with periods of very light rain or snow near the Cascade crest this morning becoming mostly cloudy in the afternoon. |
Stevens and Snoqualmie Pass
| Monday | Cloudy. Periods of very light rain or snow mainly this morning. Light to moderate east wind in the Passes becoming light west winds in the afternoon. |
Mt. Rainier, Crystal and White Pass
| Monday | Mostly cloudy with a chance of light rain or snow this morning, becoming partly sunny in the afternoon with filtered sunshine. |
Mt. Hood
| Monday | Mostly clear becoming high overcast with filtered sunshine in the afternoon. |
Issued: 7:07 AM PST Monday, December 30, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Morning | Snow Level * | 4500' | 4500' | 1000' | 1000' | 3000' | 5000' | 4500' | 5000' |
| Monday Afternoon | Snow Level | 5000' | 4000' | 3000' | 3000' | 4000' | 4000' | 4500' | 5500' |
| Monday Evening | Snow Level | 4500' | 3500' | 2000' | 2000' | 3000' | 3500' | 3500' | 5500' |
| Monday Night | Snow Level * | 5000' | 3500' | 2000' | 2000' | 3000' | 3000' | 3500' | 6000' |
| Tuesday Morning | Snow Level * | 6500' | 3500' | 2000' | 2000' | 3000' | 3000' | 4000' | 6000' |
| Tuesday Afternoon | Snow Level * | 8000' | 4500' | 3000' | 4500' | 5000' | 6500' | 8000' | 8000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning |
Snow Level 4500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 5000' |
| Monday Evening |
Snow Level 4500' |
| Monday Night |
Snow Level 5000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 6500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 8000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning |
Snow Level 4500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 4000' |
| Monday Evening |
Snow Level 3500' |
| Monday Night |
Snow Level 3500' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 3500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 1000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 3000' |
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 2000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 2000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Morning |
Snow Level 1000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 3000' |
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 2000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 2000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 3000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 4000' |
| Monday Evening |
Snow Level 3000' |
| Monday Night |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 5000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 4000' |
| Monday Evening |
Snow Level 3500' |
| Monday Night |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 3000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 6500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Morning |
Snow Level 4500' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 4500' |
| Monday Evening |
Snow Level 3500' |
| Monday Night |
Snow Level 3500' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 4000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 8000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning |
Snow Level 5000' (Easterly Flow *) |
| Monday Afternoon |
Snow Level 5500' |
| Monday Evening |
Snow Level 5500' |
| Monday Night |
Snow Level 6000' (Easterly Flow *) |
| Tuesday Morning |
Snow Level 6000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 8000' (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 | Monday Night | Tuesday | |
|---|---|---|---|
| 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | LT 0.25 | 0.50 - 0.75 |
| Mt Baker Ski Area | LT 0.25 | LT 0.25 | 1.00 |
| Washington Pass | LT 0.10 | LT 0.10 | 0.25 - 0.50 |
| Leavenworth | 0 | 0 | 0.25 |
| Stevens Pass | LT 0.10 | LT 0.10 | 0.75 -1.00 |
| Snoqualmie Pass | LT 0.10 | LT 0.10 | 1.00 |
| Mission Ridge | 0 | 0 | LT 0.25 |
| Crystal Mt | LT 0.10 | LT 0.10 | 0.25 - 0.50 |
| Paradise | LT 0.10 | LT 0.10 | 0.75 -1.00 |
| White Pass | 0 | LT 0.10 | 0.50 |
| Mt Hood Meadows | 0 | 0 | 0.25 - 0.50 |
| Timberline | 0 | 0 | 0.25 - 0.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday | LT 0.10 |
| Monday Night | LT 0.25 |
| Tuesday | 0.50 - 0.75 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday | LT 0.25 |
| Monday Night | LT 0.25 |
| Tuesday | 1.00 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | 0.25 - 0.50 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | 0.25 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | 0.75 -1.00 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | 1.00 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | LT 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | 0.25 - 0.50 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | 0.75 -1.00 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | LT 0.10 |
| Tuesday | 0.50 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | 0.25 - 0.50 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday | 0 |
| Monday Night | 0 |
| Tuesday | 0.25 - 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: 7:07 AM PST Monday, December 30, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | S 5 - 15 | SW 0 - 10 | W 5 - 15 | W 0 - 10 | W 5 - 15 |
| Monday Afternoon | SW 5 - 15 | W 5 - 15 | W 10 - 20 | W 10 - 20 | W 5 - 15 |
| Monday Evening | SW 5 - 15 | SW 10 - 20 | W 10 - 20 | W 10 - 20 | WNW 15 - 25 |
| Monday Night | SW 10 - 20 | S 10 - 20 | W 10 - 20 | W 10 - 20 | WNW 20 - 30 |
| Tuesday Morning | SW 15 - 25 | S 15 - 25 | SW 15 - 25 | SW 15 - 25 | W 20 - 30 |
| Tuesday Afternoon | WSW 25 - 35 | SSW 25 - 35 | SW 25 - 35 | SW 25 - 35 | W 25 - 35 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | S 5 - 15 |
| Monday Afternoon | SW 5 - 15 |
| Monday Evening | SW 5 - 15 |
| Monday Night | SW 10 - 20 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | WSW 25 - 35 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | SW 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Monday Evening | SW 10 - 20 |
| Monday Night | S 10 - 20 |
| Tuesday Morning | S 15 - 25 |
| Tuesday Afternoon | SSW 25 - 35 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | W 10 - 20 |
| Monday Evening | W 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | SW 25 - 35 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | W 10 - 20 |
| Monday Evening | W 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | SW 25 - 35 |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | W 5 - 15 |
| Monday Evening | WNW 15 - 25 |
| Monday Night | WNW 20 - 30 |
| Tuesday Morning | W 20 - 30 |
| Tuesday Afternoon | W 25 - 35 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | S 5 - 15 |
| Monday Afternoon | SW 5 - 15 |
| Monday Evening | SW 5 - 15 |
| Monday Night | SW 10 - 20 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | WSW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | SW 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Monday Evening | SW 10 - 20 |
| Monday Night | S 10 - 20 |
| Tuesday Morning | S 15 - 25 |
| Tuesday Afternoon | SSW 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | W 10 - 20 |
| Monday Evening | W 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | SW 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | W 10 - 20 |
| Monday Evening | W 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | SW 25 - 35 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | W 5 - 15 |
| Monday Evening | WNW 15 - 25 |
| Monday Night | WNW 20 - 30 |
| Tuesday Morning | W 20 - 30 |
| Tuesday Afternoon | W 25 - 35 |
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 Morning | SW 10 - 20 | SW 10 - 20 | W 15 - 25 | W 15 - 25 | W 10 - 20 |
| Monday Afternoon | W 15 - 25 | W 15 - 25 | W 20 - 30 | W 20 - 30 | NW 15 - 25 |
| Monday Evening | W 20 - 30 | W 20 - 30 | NW 25 - 35 | NW 25 - 35 | NW 25 - 35 |
| Monday Night | W 20 - 30 | W 20 - 30 | NW 25 - 35 | NW 25 - 35 | NW 30 - 40 |
| Tuesday Morning | WSW 25 - 35 | WSW 20 - 30 | W 30 - 40 | W 30 - 40 | NW 35 - 45 |
| Tuesday Afternoon | W 40 - 60 | W 40 - 50 | W 40 - 60 | W 40 - 60 | WNW 40 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | W 15 - 25 |
| Monday Evening | W 20 - 30 |
| Monday Night | W 20 - 30 |
| Tuesday Morning | WSW 25 - 35 |
| Tuesday Afternoon | W 40 - 60 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | W 15 - 25 |
| Monday Evening | W 20 - 30 |
| Monday Night | W 20 - 30 |
| Tuesday Morning | WSW 20 - 30 |
| Tuesday Afternoon | W 40 - 50 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | W 15 - 25 |
| Monday Afternoon | W 20 - 30 |
| Monday Evening | NW 25 - 35 |
| Monday Night | NW 25 - 35 |
| Tuesday Morning | W 30 - 40 |
| Tuesday Afternoon | W 40 - 60 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | W 15 - 25 |
| Monday Afternoon | W 20 - 30 |
| Monday Evening | NW 25 - 35 |
| Monday Night | NW 25 - 35 |
| Tuesday Morning | W 30 - 40 |
| Tuesday Afternoon | W 40 - 60 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | W 10 - 20 |
| Monday Afternoon | NW 15 - 25 |
| Monday Evening | NW 25 - 35 |
| Monday Night | NW 30 - 40 |
| Tuesday Morning | NW 35 - 45 |
| Tuesday Afternoon | WNW 40 - 60 |
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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Dec 29, 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.