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 & Friday
An upper trough passing through the PNW this morning in NW flow aloft should result in light showers at cool snow levels and a few inches of snow mainly along the west slopes of the Cascades. An upper level ridge will begin building offshore Monday afternoon and a slow drying trend will ensue with little change in snow levels.
The upper level ridge axis will shift toward the coast overnight. Building surface high pressure to our east will help moderate offshore flow develop by late Monday night and continue on Tuesday. Free air freezing levels will be on the rise with 9000+ foot freezing levels forecast over the Olympics by Tuesday afternoon. However cold air along the east slopes and easterly flow will help suppress a rapid warming for the Cascades and Mt. Hood. Breezy E-SE winds at Pass level and for south and central Cascade ridge-lines exposed to east flow will diminish Tuesday night.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday Morning |
Mostly cloudy with light rain and snow showers. |
| Monday Afternoon |
Partly to mostly cloudy with isolated light rain and snow showers. |
| Monday Night - Tuesday Morning |
Mostly clear except for possible areas of low clouds near the Cascade Passes and sheltered valleys. Multiple freezing levels due to temperature inversions and easterly flow. Breezy Cascades Passes and ridge-lines in the central and south Cascades exposed to east winds. |
| Tuesday Afternoon - Tuesday Night |
Mostly clear. Multiple freezing levels due to temperature inversions and easterly flow. Slow warming trend. |
Olympics
| Monday Morning |
Mostly cloudy with light rain and snow showers. |
| Monday Afternoon |
Partly cloudy with isolated light rain and snow showers. |
| Monday Night - Tuesday Morning |
Mostly clear. |
| Tuesday Afternoon - Tuesday Night |
Mostly clear and warmer. |
East slopes of the Washington Cascades
| Monday Morning |
Partly to mostly cloudy with scattered light rain and snow showers mainly near the Cascade crest. |
| Monday Afternoon |
Mostly to partly sunny. |
| Monday Night - Tuesday Morning |
Mostly clear except for possible areas of low clouds near the Cascade Passes and sheltered valleys. |
| Tuesday Afternoon - Tuesday Night |
Mostly clear. Slow warming trend. |
Mt. Hood Area
| Monday Morning |
Mostly cloudy with light rain and snow showers. |
| Monday Afternoon |
Partly to mostly cloudy with isolated light rain and snow showers. |
| Monday Night - Tuesday Morning |
Mostly clear. Multiple freezing levels due to temperature inversions and easterly flow. Breezy lower and mid mountain. |
| Tuesday Afternoon - Tuesday Night |
Mostly clear. Multiple freezing levels due to temperature inversions and easterly flow. Slow warming trend. |
Issued: 7:12 AM PST Monday, February 22, 2016
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 | 2500' | 2000' | 1500' | ' | ' | 2000' | ' | 3000' |
| Monday Afternoon | Snow Level | 3000' | 2500' | 2500' | ' | ' | 2500' | ' | 3500' |
| Monday Night - Tuesday Morning | Freezing Level * | 4000' | 3000' | 1500' | ' | ' | 2000' | ' | 3500' |
| Tuesday Afternoon | Freezing Level * | 9500' | 6000' | 3500' | ' | ' | 4000' | ' | 6500' |
| Tuesday Night | Freezing Level * | 7000' | 7000' | 2000' | ' | ' | 4000' | ' | 8000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' |
| Monday Night - Tuesday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 7000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Night - Tuesday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 7000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 1500' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Night - Tuesday Morning |
Freezing Level 1500' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 3500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 2000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Night - Tuesday Morning |
Freezing Level 2000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 4000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 4000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Morning |
Snow Level ' |
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Freezing Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Tuesday Night |
Freezing Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Night - Tuesday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Tuesday Night |
Freezing 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
| Friday | Friday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.25 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | LT 0.25 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.25 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | LT 0.10 |
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: 7:12 AM PST Monday, February 22, 2016
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | W 5 - 15 | WSW 0 - 10 | W 10 - 20 | --- - | W 10 - 20 |
| Monday Afternoon | VAR 0 - 10 | N 0 - 10 | NW 0 - 10 | --- - | WNW 5 - 15 |
| Monday Night | E 0 - 10 | E 0 - 10 | E 0 - 10 | --- - | E 5 - 15 |
| Tuesday Morning | ESE 5 - 15 | E 0 - 10 | ESE 15 - 30 | --- - | ESE 15 - 25 |
| Tuesday Afternoon - Tuesday Night | SE 5 - 15 | E 0 - 10 | ESE 10 - 20 | --- - | ESE 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | E 0 - 10 |
| Tuesday Morning | ESE 5 - 15 |
| Tuesday Afternoon - Tuesday Night | SE 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | WSW 0 - 10 |
| Monday Afternoon | N 0 - 10 |
| Monday Night | E 0 - 10 |
| Tuesday Morning | E 0 - 10 |
| Tuesday Afternoon - Tuesday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | W 10 - 20 |
| Monday Afternoon | NW 0 - 10 |
| Monday Night | E 0 - 10 |
| Tuesday Morning | ESE 15 - 30 |
| Tuesday Afternoon - Tuesday Night | ESE 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon - Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | W 10 - 20 |
| Monday Afternoon | WNW 5 - 15 |
| Monday Night | E 5 - 15 |
| Tuesday Morning | ESE 15 - 25 |
| Tuesday Afternoon - Tuesday Night | ESE 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | VAR 0 - 10 |
| Monday Night | E 0 - 10 |
| Tuesday Morning | ESE 5 - 15 |
| Tuesday Afternoon - Tuesday Night | SE 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | WSW 0 - 10 |
| Monday Afternoon | N 0 - 10 |
| Monday Night | E 0 - 10 |
| Tuesday Morning | E 0 - 10 |
| Tuesday Afternoon - Tuesday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | W 10 - 20 |
| Monday Afternoon | NW 0 - 10 |
| Monday Night | E 0 - 10 |
| Tuesday Morning | ESE 15 - 30 |
| Tuesday Afternoon - Tuesday Night | ESE 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon - Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | W 10 - 20 |
| Monday Afternoon | WNW 5 - 15 |
| Monday Night | E 5 - 15 |
| Tuesday Morning | ESE 15 - 25 |
| Tuesday Afternoon - Tuesday Night | ESE 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 Morning | W 10 - 20 | NW 25 - 35 | W 20 - 30 | --- - | WNW 20 - 30 |
| Monday Afternoon | N 0 - 10 | N 5 - 15 | NNW 5 - 15 | --- - | NNW 10 - 20 |
| Monday Night - Tuesday Morning | NE 0 - 10 | NE 0 - 10 | ENE 0 - 10 | --- - | ENE 0 - 10 |
| Tuesday Afternoon - Tuesday Night | WSW 5 - 15 | WSW 5 - 15 | WSW 10 - 20 | --- - | W 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | W 10 - 20 |
| Monday Afternoon | N 0 - 10 |
| Monday Night - Tuesday Morning | NE 0 - 10 |
| Tuesday Afternoon - Tuesday Night | WSW 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | NW 25 - 35 |
| Monday Afternoon | N 5 - 15 |
| Monday Night - Tuesday Morning | NE 0 - 10 |
| Tuesday Afternoon - Tuesday Night | WSW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | W 20 - 30 |
| Monday Afternoon | NNW 5 - 15 |
| Monday Night - Tuesday Morning | ENE 0 - 10 |
| Tuesday Afternoon - Tuesday Night | WSW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon - Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | WNW 20 - 30 |
| Monday Afternoon | NNW 10 - 20 |
| Monday Night - Tuesday Morning | ENE 0 - 10 |
| Tuesday Afternoon - Tuesday Night | 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: 7:12 AM PST Monday, February 22, 2016
Extended Weather Synopsis for Friday night through Friday
A weak upper level shortwave should dampen the upper level ridge on Wednesday but only amount to a few sprinkles for the Olympics and northwest Cascades with a mix of mid and high clouds elsewhere. The warming trend should pick up steam as the ridge rebuilds offshore Wednesday through Thursday. Forecast models are in good agreement that the next Pacific frontal system will impact the area Friday night.
Extended Weather
Olympics, Washington Cascades and Mt. Hood
Partly to mostly cloudy with periods of high clouds. Slight chance of light rain and snow showers Olympics and northwest Cascades. Mild.
Mostly clear. Mild.
Increasing mid and high clouds. Chance of light rain and snow Olympics Friday afternoon.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday - Wednesday Night | Freezing Level | 6000' - 7000' | 6500' - 7500' | 7500' - 8500' | |
| Thursday - Thursday Night | Freezing Level | 8000' - 9000' | 8500' - 9500' | 9500' - 10500' | |
| Friday | Freezing Level | 7000' - 8000' | 7500' - 8500' | 8000' - 9000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Freezing Level 6000' - 7000' |
| Thursday - Thursday Night |
Freezing Level 8000' - 9000' |
| Friday |
Freezing Level 7000' - 8000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Freezing Level 6500' - 7500' |
| Thursday - Thursday Night |
Freezing Level 8500' - 9500' |
| Friday |
Freezing Level 7500' - 8500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Freezing Level 7500' - 8500' |
| Thursday - Thursday Night |
Freezing Level 9500' - 10500' |
| Friday |
Freezing Level 8000' - 9000' |
* 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 17, 2016
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.