Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Sunday night through Monday
The closed low that's been impacting the region since Friday slowly spins southward off the California coast, with high pressure edging into the region from the north as the closed low moves away and we enter a prolonged dry spell. On Sunday afternoon, mid-level clouds are continuing to wrap into the SE Washington Cascades and Mt. Hood regions. As the closed low exits clouds with isolated snow flurries should continue to decrease in Washington State, but linger over Mt. Hood into early Monday morning. Light to moderate E winds will gradually taper on Monday.
A moderate inversion forms Sunday night in many areas with colder temperatures east of the Cascade Crest. The inversion breaks down by late morning on Monday, allowing temperatures to rise quickly from late morning into the afternoon hours when freezing levels rise to 6000-7500 ft west of the Cascade Crest and 5000-6500 ft east of the Cascade Crest. Mt. Hood stays slightly cooler, remaining weakly influenced by the cooler airmass of the departing low.
Monday night should be clear and mild with a weaker inversion forming. Tuesday should be a notch cooler as a dry shortwave feature tracking N to S offshore approaches and brings a band of partial cloud-cover to the region.
Weather Forecast
Hurricane Ridge
| Sunday Night | Clear skies. |
| Monday | Sunny. Milder. |
Mt. Baker
| Sunday Night | Clear skies. |
| Monday | Sunny. Milder. |
Washington Pass and Leavenworth
| Sunday Night | Clear skies. |
| Monday | Sunny. Milder. |
Stevens and Snoqualmie Pass
| Sunday Night | Clear skies. Expect E winds 10-20 mph through the passes. |
| Monday | Sunny. Milder. Expect E winds to decreases from 10-20 mph in the morning to 5-15 mph in the afternoon. |
Mt. Rainier, Crystal and White Pass
| Sunday Night | Mostly clear. |
| Monday | Sunny. Milder. |
Mt. Hood
| Sunday Night | Mostly cloudy with isolated snow flurries in the evening. |
| Monday | Partly cloudy early, then sunny. Milder. |
Issued: 2:21 PM PDT Sunday, March 15, 2020
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Evening | Freezing Level * | 3000' | 3000' | 3500' | 2500' | 3000' | 3500' | 3000' | 1000' |
| Sunday Night | Freezing Level * | 4000' | 2500' | 2000' | 2000' | 2500' | 3000' | 3000' | 1000' |
| Monday Morning | Freezing Level * | 4500' | 3000' | 3000' | 3000' | 3500' | 3500' | 3500' | 1500' |
| Monday Afternoon | Freezing Level * | 7500' | 6500' | 5500' | 5000' | 6000' | 6500' | 6500' | 4000' |
| Monday Evening | Freezing Level * | 7500' | 7000' | 6000' | 6000' | 6500' | 7000' | 6500' | 4500' |
| Monday Night | Freezing Level | 8000' | 6000' | 5000' | 5000' | 5000' | 6500' | 6000' | 4000' |
| Tuesday Morning | Freezing Level | 7000' | 5000' | 5000' | 4500' | 5000' | 5500' | 6000' | 4500' |
| Tuesday Afternoon | Freezing Level | 6500' | 6500' | 6000' | 5500' | 6000' | 6500' | 7000' | 7000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 4000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 7500' (Easterly Flow *) |
| Monday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Monday Night |
Freezing Level 8000' |
| Tuesday Morning |
Freezing Level 7000' |
| Tuesday Afternoon |
Freezing Level 6500' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 2500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Monday Evening |
Freezing Level 7000' (Easterly Flow *) |
| Monday Night |
Freezing Level 6000' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Freezing Level 6500' |
| Washington Pass | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3500' (Easterly Flow *) |
| Sunday Night |
Freezing Level 2000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Monday Evening |
Freezing Level 6000' (Easterly Flow *) |
| Monday Night |
Freezing Level 5000' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Freezing Level 6000' |
| Leavenworth | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 2500' (Easterly Flow *) |
| Sunday Night |
Freezing Level 2000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 5000' (Easterly Flow *) |
| Monday Evening |
Freezing Level 6000' (Easterly Flow *) |
| Monday Night |
Freezing Level 5000' |
| Tuesday Morning |
Freezing Level 4500' |
| Tuesday Afternoon |
Freezing Level 5500' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 2500' (Easterly Flow *) |
| Monday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Monday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Monday Night |
Freezing Level 5000' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Freezing Level 6000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3500' (Easterly Flow *) |
| Sunday Night |
Freezing Level 3000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Monday Evening |
Freezing Level 7000' (Easterly Flow *) |
| Monday Night |
Freezing Level 6500' |
| Tuesday Morning |
Freezing Level 5500' |
| Tuesday Afternoon |
Freezing Level 6500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 3000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Monday Evening |
Freezing Level 6500' (Easterly Flow *) |
| Monday Night |
Freezing Level 6000' |
| Tuesday Morning |
Freezing Level 6000' |
| Tuesday Afternoon |
Freezing Level 7000' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 1000' (Easterly Flow *) |
| Monday Morning |
Freezing Level 1500' (Easterly Flow *) |
| Monday Afternoon |
Freezing Level 4000' (Easterly Flow *) |
| Monday Evening |
Freezing Level 4500' (Easterly Flow *) |
| Monday Night |
Freezing Level 4000' |
| Tuesday Morning |
Freezing Level 4500' |
| Tuesday Afternoon |
Freezing Level 7000' |
* 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
| Sunday Night | Monday | Monday Night | Monday | |
|---|---|---|---|---|
| 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 |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 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: 2:21 PM PDT Sunday, March 15, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | ENE 5 - 15 | ENE 5 - 15 | E 10 - 20 | ENE 10 - 20 | E 20 - 30 |
| Sunday Night | ENE 5 - 15 | ENE 0 - 10 | E 10 - 20 | ENE 10 - 20 | E 15 - 25 |
| Monday Morning | NE 0 - 10 | E 0 - 10 | E 5 - 15 | ENE 5 - 15 | E 15 - 25 |
| Monday Afternoon | N 0 - 10 | E 0 - 10 | E 0 - 10 | ENE 0 - 10 | E 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening | ENE 5 - 15 |
| Sunday Night | ENE 5 - 15 |
| Monday Morning | NE 0 - 10 |
| Monday Afternoon | N 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening | ENE 5 - 15 |
| Sunday Night | ENE 0 - 10 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | E 10 - 20 |
| Sunday Night | E 10 - 20 |
| Monday Morning | E 5 - 15 |
| Monday Afternoon | E 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Evening | ENE 10 - 20 |
| Sunday Night | ENE 10 - 20 |
| Monday Morning | ENE 5 - 15 |
| Monday Afternoon | ENE 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | E 20 - 30 |
| Sunday Night | E 15 - 25 |
| Monday Morning | E 15 - 25 |
| Monday Afternoon | E 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Evening | ENE 5 - 15 |
| Sunday Night | ENE 5 - 15 |
| Monday Morning | NE 0 - 10 |
| Monday Afternoon | N 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | ENE 5 - 15 |
| Sunday Night | ENE 0 - 10 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | E 10 - 20 |
| Sunday Night | E 10 - 20 |
| Monday Morning | E 5 - 15 |
| Monday Afternoon | E 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | ENE 10 - 20 |
| Sunday Night | ENE 10 - 20 |
| Monday Morning | ENE 5 - 15 |
| Monday Afternoon | ENE 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | E 20 - 30 |
| Sunday Night | E 15 - 25 |
| Monday Morning | E 15 - 25 |
| Monday Afternoon | E 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | E 10 - 20 | ESE 15 - 25 | E 25 - 35 | E 30 - 40 | E 20 - 30 |
| Sunday Night | VAR 0 - 10 | VAR 0 - 10 | E 20 - 30 | E 15 - 25 | ENE 25 - 35 |
| Monday Morning | NNE 5 - 15 | NNE 5 - 15 | ENE 5 - 15 | E 10 - 20 | E 25 - 35 |
| Monday Afternoon | NNE 5 - 15 | NNW 5 - 15 | ENE 0 - 10 | ENE 5 - 15 | E 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | E 10 - 20 |
| Sunday Night | VAR 0 - 10 |
| Monday Morning | NNE 5 - 15 |
| Monday Afternoon | NNE 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Evening | ESE 15 - 25 |
| Sunday Night | VAR 0 - 10 |
| Monday Morning | NNE 5 - 15 |
| Monday Afternoon | NNW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | E 25 - 35 |
| Sunday Night | E 20 - 30 |
| Monday Morning | ENE 5 - 15 |
| Monday Afternoon | ENE 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | E 30 - 40 |
| Sunday Night | E 15 - 25 |
| Monday Morning | E 10 - 20 |
| Monday Afternoon | ENE 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | E 20 - 30 |
| Sunday Night | ENE 25 - 35 |
| Monday Morning | E 25 - 35 |
| Monday Afternoon | E 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.
Issued: 2:21 PM PDT Sunday, March 15, 2020
Extended Weather Synopsis for Monday night through Monday
Tuesday night clouds exit as the offshore ridge pushes back into the region and remains over the region, keeping us dry and mild with warm sunny days and clear nights through Wednesday night. A better developed low tracks southward offshore on Thursday, pushing the ridge southward to bring in slightly cooler conditions, more clouds, and a slight chance of rain/snow showers. How far offshore the low tracks will dictate whether our region gets precipitation out of the system.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Night | Freezing Level | 4500' - 6000' | 4500' - 6000' | 3500' - 5500' | |
| Wednesday | Freezing Level | 4000' - 5500' | 4000' - 5500' | 3500' - 4500' | |
| Wednesday Night | Freezing Level | 5000' - 6000' | 4500' - 5500' | 4500' - 5500' | |
| Thursday | Freezing Level | 5000' - 6000' | 4500' - 5500' | 4500' - 5500' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Night |
Freezing Level 4500' - 6000' |
| Wednesday |
Freezing Level 4000' - 5500' |
| Wednesday Night |
Freezing Level 5000' - 6000' |
| Thursday |
Freezing Level 5000' - 6000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night |
Freezing Level 4500' - 6000' |
| Wednesday |
Freezing Level 4000' - 5500' |
| Wednesday Night |
Freezing Level 4500' - 5500' |
| Thursday |
Freezing Level 4500' - 5500' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night |
Freezing Level 3500' - 5500' |
| Wednesday |
Freezing Level 3500' - 4500' |
| Wednesday Night |
Freezing Level 4500' - 5500' |
| Thursday |
Freezing Level 4500' - 5500' |
* 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 Mar 15, 2020
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