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 Wednesday
An active cool weather pattern will continue through the end of March. A frontal system that passed through Saturday night brought several inches of snow above 4500' along the west slopes of the Cascades, Olympics, and Mt. Hood. The exception was the Mt. Baker area which pulled down 3+" water equivalent with at least 20" of snow as snow levels hovered near 4200'.
Moving into tonight, showers will wind down briefly before the last in our series of organized winter-like storms approaches the area. A low pressure system will drop south along the British Columbia coast tonight, with precipitation spreading inland to the Cascades after midnight. The cold front should pass through the Cascades mid-morning with significant shower activity following the front through the afternoon and evening. Southerly winds will increase ahead of the front tonight and become gusty out of the W-SW on Monday. A strong jet will move into the region on Monday, keeping the strongest wind focused on the south Washington Cascades and the Mt. Hood area. 1-2' of snow should be the norm across the west slopes of the Cascades and Mt. Hood with lower amounts along the eastern slopes. As much colder air filters in behind the front on Monday, look for snow levels to fall well below Pass levels in the afternoon and overnight.
The upper low associated with the frontal system will slowly sag south and approach the Washington border on Tuesday. We are in for another round of showers that will increase in the afternoon and continue well into the evening with an unstable air mass overhead. While the odd thunderstorm can't be ruled out, there's a better chance for graupel in heavier showers. Instability should spread to the east slopes of the Cascades beginning Tuesday, meaning showers will both carry over the crest and initiate from the higher terrain on the east side.
Weather Forecast
Hurricane Ridge
| Sunday Night | Rain and snow developing and increasing late this evening. Strong winds. |
| Monday | Light to moderate rain and snow showers. A few sunbreaks possible. Turning colder. Moderate to strong winds. |
Mt. Baker
| Sunday Night | Moderate rain and snow developing and increasing late this evening. Strong winds. |
| Monday | Light to moderate rain and snow showers, heaviest in the morning. A few sunbreaks possible. Turning colder. Moderate to strong winds. |
Washington Pass and Leavenworth
| Sunday Night | Light rain and snow developing later this evening. |
| Monday | Light scattered rain and snow showers Washington Pass. Partly sunny further east. |
Stevens and Snoqualmie Pass
| Sunday Night | Light rain and snow developing later this evening. Light east winds at Pass level becoming moderate overnight. |
| Monday | Light to moderate rain and snow showers. Turning colder. Moderate west winds at Pass level. |
Mt. Rainier, Crystal and White Pass
| Sunday Night | Light rain and snow developing later this evening and becoming moderate overnight. Strong winds developing. |
| Monday | Light to moderate rain and snow showers, heaviest Paradise. Turning colder. Strong winds. |
Mt. Hood
| Sunday Night | Light rain and snow developing later this evening and increasing late tonight. Very strong winds developing. |
| Monday | Moderate to occasionally heavy rain and snow showers. Turning colder. Very strong to extreme winds. |
Issued: 2:27 PM PDT Sunday, March 29, 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 | Snow Level | 3500' | 3500' | 4000' | 4000' | 4000' | 4000' | 4500' | 5000' |
| Sunday Night | Snow Level * | 3500' | 3500' | 3000' | 4000' | 3000' | 3000' | 4000' | 4500' |
| Monday Morning | Snow Level | 2000' | 2500' | 3000' | 4000' | 3000' | 3000' | 3000' | 4500' |
| Monday Afternoon | Snow Level | 2000' | 2000' | 2500' | 3500' | 2500' | 2500' | 2500' | 3000' |
| Monday Evening | Snow Level | 1500' | 1500' | 2000' | 2500' | 2000' | 2000' | 2000' | 2500' |
| Monday Night | Snow Level | 1000' | 1000' | 1000' | 1500' | 1500' | 1500' | 1500' | 2000' |
| Tuesday Morning | Snow Level | 1500' | 1500' | 1500' | 2500' | 2000' | 2000' | 2000' | 2500' |
| Tuesday Afternoon | Snow Level | 2500' | 2500' | 3000' | 3500' | 2500' | 2500' | 2500' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3500' |
| Sunday Night |
Snow Level 3500' (Easterly Flow *) |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 2000' |
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 2500' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3500' |
| Sunday Night |
Snow Level 3500' (Easterly Flow *) |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 2000' |
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 3000' (Easterly Flow *) |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 3000' |
| Leavenworth | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 4000' (Easterly Flow *) |
| Monday Morning |
Snow Level 4000' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Evening |
Snow Level 2500' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 3000' (Easterly Flow *) |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 3000' (Easterly Flow *) |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Evening |
Snow Level 4500' |
| Sunday Night |
Snow Level 4000' (Easterly Flow *) |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 2500' |
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 2500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening |
Snow Level 5000' |
| Sunday Night |
Snow Level 4500' (Easterly Flow *) |
| Monday Morning |
Snow Level 4500' |
| Monday Afternoon |
Snow Level 3000' |
| Monday Evening |
Snow Level 2500' |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Snow Level 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.
Precipitation Forecast
| Sunday Night | Wednesday | Wednesday Night | Wednesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0.50 - 0.75 | 0.50 | LT 0.25 | 0.25 |
| Mt Baker Ski Area | 1.00 | 1.00 | 0.25 - 0.50 | 0.25 - 0.50 |
| Washington Pass | LT 0.25 | 0.25 | LT 0.10 | LT 0.25 |
| Leavenworth | LT 0.10 | LT 0.25 | LT 0.10 | LT 0.10 |
| Stevens Pass | 0.25 | 0.25 - 0.50 | LT 0.25 | 0.25 |
| Snoqualmie Pass | 0.25 - 0.50 | 0.50 - 0.75 | 0.25 | 0.25 - 0.50 |
| Mission Ridge | LT 0.10 | LT 0.25 | LT 0.10 | LT 0.25 |
| Crystal Mt | 0.50 - 0.75 | 0.25 - 0.50 | LT 0.10 | 0.25 - 0.50 |
| Paradise | 0.75 | 0.75 -1.00 | 0.25 - 0.50 | 0.50 |
| White Pass | 0.25 - 0.50 | 0.50 - 0.75 | 0.25 - 0.50 | 0.25 - 0.50 |
| Mt Hood Meadows | 0.25 - 0.50 | 0.75 -1.00 | 0.50 | 0.25 |
| Timberline | 0.50 | 1.00 - 1.50 | 0.50 - 0.75 | 0.25 - 0.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0.50 - 0.75 |
| Wednesday | 0.50 |
| Wednesday Night | LT 0.25 |
| Wednesday | 0.25 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday Night | 1.00 |
| Wednesday | 1.00 |
| Wednesday Night | 0.25 - 0.50 |
| Wednesday | 0.25 - 0.50 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.25 |
| Wednesday | 0.25 |
| Wednesday Night | LT 0.10 |
| Wednesday | LT 0.25 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Wednesday | LT 0.25 |
| Wednesday Night | LT 0.10 |
| Wednesday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 |
| Wednesday | 0.25 - 0.50 |
| Wednesday Night | LT 0.25 |
| Wednesday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 - 0.50 |
| Wednesday | 0.50 - 0.75 |
| Wednesday Night | 0.25 |
| Wednesday | 0.25 - 0.50 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Wednesday | LT 0.25 |
| Wednesday Night | LT 0.10 |
| Wednesday | LT 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday Night | 0.50 - 0.75 |
| Wednesday | 0.25 - 0.50 |
| Wednesday Night | LT 0.10 |
| Wednesday | 0.25 - 0.50 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday Night | 0.75 |
| Wednesday | 0.75 -1.00 |
| Wednesday Night | 0.25 - 0.50 |
| Wednesday | 0.50 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 - 0.50 |
| Wednesday | 0.50 - 0.75 |
| Wednesday Night | 0.25 - 0.50 |
| Wednesday | 0.25 - 0.50 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 - 0.50 |
| Wednesday | 0.75 -1.00 |
| Wednesday Night | 0.50 |
| Wednesday | 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday Night | 0.50 |
| Wednesday | 1.00 - 1.50 |
| Wednesday Night | 0.50 - 0.75 |
| Wednesday | 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: 2:27 PM PDT Sunday, March 29, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | S 20 - 30 | S 25 - 35 | SE 10 - 20 | S 15 - 25 | SW 20 - 30 |
| Sunday Night | S 25 - 35 | S 30 - 40 | SE 15 - 25 | S 20 - 30 | S 20 - 30 |
| Monday Morning | SW 15 - 25 | SW 15 - 25 | SW 20 - 30 | WSW 20 - 30 | W 25 - 35 |
| Monday Afternoon | SW 15 - 25 | SW 15 - 25 | WSW 20 - 30 | WSW 20 - 30 | W 25 - 35 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening | S 20 - 30 |
| Sunday Night | S 25 - 35 |
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening | S 25 - 35 |
| Sunday Night | S 30 - 40 |
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | SE 10 - 20 |
| Sunday Night | SE 15 - 25 |
| Monday Morning | SW 20 - 30 |
| Monday Afternoon | WSW 20 - 30 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Evening | S 15 - 25 |
| Sunday Night | S 20 - 30 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | WSW 20 - 30 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | SW 20 - 30 |
| Sunday Night | S 20 - 30 |
| Monday Morning | W 25 - 35 |
| Monday Afternoon | W 25 - 35 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Evening | S 20 - 30 |
| Sunday Night | S 25 - 35 |
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | S 25 - 35 |
| Sunday Night | S 30 - 40 |
| Monday Morning | SW 15 - 25 |
| Monday Afternoon | SW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | SE 10 - 20 |
| Sunday Night | SE 15 - 25 |
| Monday Morning | SW 20 - 30 |
| Monday Afternoon | WSW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | S 15 - 25 |
| Sunday Night | S 20 - 30 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | WSW 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | SW 20 - 30 |
| Sunday Night | S 20 - 30 |
| Monday Morning | W 25 - 35 |
| Monday 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 | |
|---|---|---|---|---|---|
| Sunday Evening | SW 30 - 40 | SW 25 - 35 | SW 30 - 40 | SW 25 - 35 | WSW 35 - 45 |
| Sunday Night | SSW 50 - 60 | S 45 - 55 | SW 40 - 50 | SW 50 - 70 | SW 50 - 70 |
| Monday Morning | SW 40 - 50 | SSW 35 - 45 | SW 50 - 60 | SW 50 - 70 | SW 60 - 80 |
| Monday Afternoon | SW 25 - 35 | SW 25 - 35 | WSW 40 - 50 | SW 40 - 50 | SW 60 - 80 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | SW 30 - 40 |
| Sunday Night | SSW 50 - 60 |
| Monday Morning | SW 40 - 50 |
| Monday Afternoon | SW 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Evening | SW 25 - 35 |
| Sunday Night | S 45 - 55 |
| Monday Morning | SSW 35 - 45 |
| Monday Afternoon | SW 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | SW 30 - 40 |
| Sunday Night | SW 40 - 50 |
| Monday Morning | SW 50 - 60 |
| Monday Afternoon | WSW 40 - 50 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | SW 25 - 35 |
| Sunday Night | SW 50 - 70 |
| Monday Morning | SW 50 - 70 |
| Monday Afternoon | SW 40 - 50 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | WSW 35 - 45 |
| Sunday Night | SW 50 - 70 |
| Monday Morning | SW 60 - 80 |
| Monday Afternoon | SW 60 - 80 |
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: 2:27 PM PDT Sunday, March 29, 2020
Extended Weather Synopsis for Wednesday night through Wednesday
Wednesday should be a near repeat of Tuesday, perhaps with some more sunbreaks. Snow levels will be unseasonably cold through the extended with downright frigid temperatures for early April possible Wednesday night into Thursday. The low centered over our offshore waters will finally weaken and pass inland on Thursday. We remain under cool NW flow aloft and snow showers will remain in the forecast.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Night | Snow Level | 500' - 1500' | 500' - 1500' | 1000' - 2000' | |
| Wednesday | Snow Level | 1500' - 2500' | 2000' - 3000' | 2000' - 3000' | |
| Wednesday Night | Snow Level | 0' - 500' | 0' - 500' | 0' - 1000' | |
| Thursday | Snow Level | 500' - 1500' | 1000' - 2000' | 1500' - 2500' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Night |
Snow Level 500' - 1500' |
| Wednesday |
Snow Level 1500' - 2500' |
| Wednesday Night |
Snow Level 0' - 500' |
| Thursday |
Snow Level 500' - 1500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night |
Snow Level 500' - 1500' |
| Wednesday |
Snow Level 2000' - 3000' |
| Wednesday Night |
Snow Level 0' - 500' |
| Thursday |
Snow Level 1000' - 2000' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night |
Snow Level 1000' - 2000' |
| Wednesday |
Snow Level 2000' - 3000' |
| Wednesday Night |
Snow Level 0' - 1000' |
| Thursday |
Snow Level 1500' - 2500' |
* 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 28, 2020
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