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 Wednesday
A sharp frontal system will produce a significant winter storm impacting the Pacific Northwest Monday night, with a frontal passage during the early morning hours and slightly later for Mt. Hood. Winds and moderate to occasionally heavy snowfall will move southward with the frontal system arriving from the NW. SSW winds have been strong to extreme in the Mt. Baker area on Monday afternoon. The higher momentum air will move southward ahead of the front and will decrease and switch westerly with the frontal passage with the Mt. Hood area getting the strongest winds after midnight. This storm will be a major snow producer with many areas of the Cascades west slopes approaching 1 ft of snowfall overnight, with light to moderate snow showers continuing during the day on Tuesday, with locally heavy convergence bands developing late in the day as snow shower activity becomes less widespread. The shower activity will be under a sharp trough over the Pacific northwest feeding cold unstable air and moisture. Snow showers and convergence bands will continue through Tuesday night and generally end Wednesday morning. The post-frontal component of this storm will be quite significant with some areas receiving another foot of snowfall. Clouds are likely to linger west of the Cascade Crest on Wednesday.
Weather Forecast
Hurricane Ridge
| Monday Night | Light to moderate snow, decreasing and becoming showery after midnight. Moderate winds possibly gusting strong. Cooling temperatures. |
| Tuesday | Decreasing light snow showers with sun breaks increasing throughout the day. Moderate winds. |
Mt. Baker
| Monday Night | Moderate to occasionally heavy snow. Moderate to strong winds decreasing to light to moderate. |
| Tuesday | Decreasing generally light snow showers. Light to moderate winds. |
Washington Pass and Leavenworth
| Monday Night | Light to moderate snowfall increasing near the Cascade Crest. Increasing light snowfall further east. Moderate winds. |
| Tuesday | Generally light snow showers, heaviest in the central Cascades. Light to moderate winds strongest near low-elevation gaps. |
Stevens and Snoqualmie Pass
| Monday Night | Light to moderate snowfall increasing during the evening and becoming sustained moderate and locally heavy after midnight. Moderate 5000 ft winds and moderate pass winds shifting from E to W after midnight. |
| Tuesday | Light to moderate snowfall decreasing in extent and increasingly focused on convergence bands possibly in the vicinity of the passes. Light to moderate alpine and W wind through the passes. |
Mt. Rainier, Crystal and White Pass
| Monday Night | Light to moderate snowfall increasing during the evening and becoming sustained moderate and locally heavy after midnight. Increasing moderate winds gusting strong. |
| Tuesday | Light to moderate snowfall decreasing in extent. Light to moderate winds. |
Mt. Hood
| Monday Night | Moderate snow developing after midnight. Increasing moderate to strong winds. |
| Tuesday | Decreasing moderate snow becoming light to moderate snow showers in the afternoon. Moderate to strong winds. |
Issued: 2:58 PM PDT Monday, March 11, 2019
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 * | 3000' | 2000' | 3000' | 3000' | 3000' | 3000' | 3500' | 4500' |
| Monday Night | Snow Level | 3000' | 2000' | 2000' | 1500' | 2500' | 3000' | 3000' | 4000' |
| Tuesday Morning | Snow Level | 2000' | 1500' | 2000' | 1500' | 2500' | 2500' | 2500' | 2500' |
| Tuesday Afternoon | Snow Level | 2000' | 1500' | 2500' | 2000' | 2000' | 2000' | 2000' | 2000' |
| Tuesday Evening | Snow Level | 2500' | 1500' | 2000' | 2000' | 1500' | 1500' | 2000' | 2000' |
| Tuesday Night | Snow Level | 1500' | 1000' | 1000' | 1000' | 1000' | 1000' | 1000' | 1500' |
| Wednesday Morning | Snow Level | 1500' | 1000' | 500' | 1000' | 500' | 500' | 1000' | 1500' |
| Wednesday Afternoon | Freezing Level | 30000' | 2500' | 3000' | 3500' | 3000' | 3000' | 3500' | 3000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 3000' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 2500' |
| Tuesday Night |
Snow Level 1500' |
| Wednesday Morning |
Snow Level 1500' |
| Wednesday Afternoon |
Freezing Level 30000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Snow Level 2000' (Easterly Flow *) |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 1500' |
| Tuesday Evening |
Snow Level 1500' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 1000' |
| Wednesday Afternoon |
Freezing Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 2500' |
| Tuesday Evening |
Snow Level 2000' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Freezing Level 3000' |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 2000' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 1000' |
| Wednesday Afternoon |
Freezing Level 3500' |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 2500' |
| Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 1500' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Freezing Level 3000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 3000' (Easterly Flow *) |
| Monday Night |
Snow Level 3000' |
| Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 1500' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Freezing Level 3000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Snow Level 3500' (Easterly Flow *) |
| Monday Night |
Snow Level 3000' |
| Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 2000' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 1000' |
| Wednesday Afternoon |
Freezing Level 3500' |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Snow Level 4500' (Easterly Flow *) |
| Monday Night |
Snow Level 4000' |
| Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 2000' |
| Tuesday Night |
Snow Level 1500' |
| Wednesday Morning |
Snow Level 1500' |
| Wednesday Afternoon |
Freezing 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
| Monday Night | Wednesday | Wednesday Night | Wednesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0.25 - 0.50 | LT 0.10 | 0 | 0 |
| Mt Baker Ski Area | 0.75 -1.00 | 0.25 | LT 0.10 | LT 0.10 |
| Washington Pass | 0.25 | LT 0.25 | LT 0.10 | 0 |
| Leavenworth | LT 0.10 | LT 0.10 | 0 | 0 |
| Stevens Pass | 0.50 - 0.75 | 0.25 | 0.25 | LT 0.10 |
| Snoqualmie Pass | 0.75 | 0.50 | 0.25 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 | 0 | 0 |
| Crystal Mt | 0.25 | 0.25 | 0.25 - 0.50 | 0 |
| Paradise | 0.75 -1.00 | 0.50 | 0.25 | 0 |
| White Pass | 0.50 | 0.25 | LT 0.25 | 0 |
| Mt Hood Meadows | 0.50 | 0.75 | 0.50 | LT 0.10 |
| Timberline | 0.50 - 0.75 | 0.75 -1.00 | 0.50 | LT 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 - 0.50 |
| Wednesday | LT 0.10 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | 0.75 -1.00 |
| Wednesday | 0.25 |
| Wednesday Night | LT 0.10 |
| Wednesday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 |
| Wednesday | LT 0.25 |
| Wednesday Night | LT 0.10 |
| Wednesday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Wednesday | LT 0.10 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0.50 - 0.75 |
| Wednesday | 0.25 |
| Wednesday Night | 0.25 |
| Wednesday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0.75 |
| Wednesday | 0.50 |
| Wednesday Night | 0.25 |
| Wednesday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Wednesday | LT 0.10 |
| Wednesday Night | 0 |
| Wednesday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 |
| Wednesday | 0.25 |
| Wednesday Night | 0.25 - 0.50 |
| Wednesday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | 0.75 -1.00 |
| Wednesday | 0.50 |
| Wednesday Night | 0.25 |
| Wednesday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0.50 |
| Wednesday | 0.25 |
| Wednesday Night | LT 0.25 |
| Wednesday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | 0.50 |
| Wednesday | 0.75 |
| Wednesday Night | 0.50 |
| Wednesday | LT 0.10 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | 0.50 - 0.75 |
| Wednesday | 0.75 -1.00 |
| Wednesday Night | 0.50 |
| Wednesday | LT 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: 2:58 PM PDT Monday, March 11, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | SSW 20 - 30 | SSW 30 - 45 | SSW 20 - 30 | S 20 - 30 | SW 20 - 30 |
| Monday Night | W 15 - 25 | S 10 - 20 | SSW 20 - 30 | SW 20 - 30 | SW 25 - 35 |
| Tuesday Morning | W 20 - 30 | SW 10 - 20 | WSW 15 - 25 | WSW 20 - 30 | W 25 - 35 |
| Tuesday Afternoon | W 20 - 30 | WSW 15 - 25 | WSW 15 - 25 | WSW 20 - 30 | W 25 - 35 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | SSW 20 - 30 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 20 - 30 |
| Tuesday Afternoon | W 20 - 30 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | SSW 30 - 45 |
| Monday Night | S 10 - 20 |
| Tuesday Morning | SW 10 - 20 |
| Tuesday Afternoon | WSW 15 - 25 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | SSW 20 - 30 |
| Monday Night | SSW 20 - 30 |
| Tuesday Morning | WSW 15 - 25 |
| Tuesday Afternoon | WSW 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | S 20 - 30 |
| Monday Night | SW 20 - 30 |
| Tuesday Morning | WSW 20 - 30 |
| Tuesday Afternoon | WSW 20 - 30 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | SW 20 - 30 |
| Monday Night | SW 25 - 35 |
| Tuesday Morning | W 25 - 35 |
| Tuesday Afternoon | W 25 - 35 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | SSW 20 - 30 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | W 20 - 30 |
| Tuesday Afternoon | W 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | SSW 30 - 45 |
| Monday Night | S 10 - 20 |
| Tuesday Morning | SW 10 - 20 |
| Tuesday Afternoon | WSW 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | SSW 20 - 30 |
| Monday Night | SSW 20 - 30 |
| Tuesday Morning | WSW 15 - 25 |
| Tuesday Afternoon | WSW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | S 20 - 30 |
| Monday Night | SW 20 - 30 |
| Tuesday Morning | WSW 20 - 30 |
| Tuesday Afternoon | WSW 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | SW 20 - 30 |
| Monday Night | SW 25 - 35 |
| Tuesday Morning | W 25 - 35 |
| 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 Evening | SW 40 - 60 | SW 35 - 50 | SW 40 - 60 | SW 40 - 60 | SW 35 - 50 |
| Monday Night | SW 20 - 30 | SW 20 - 30 | SW 30 - 45 | SW 35 - 50 | SW 40 - 60 |
| Tuesday Morning | WSW 10 - 20 | WSW 10 - 20 | WSW 20 - 30 | WSW 30 - 45 | WSW 30 - 45 |
| Tuesday Afternoon | W 15 - 25 | W 20 - 30 | WNW 30 - 45 | W 30 - 45 | W 35 - 50 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | SW 40 - 60 |
| Monday Night | SW 20 - 30 |
| Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon | W 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | SW 35 - 50 |
| Monday Night | SW 20 - 30 |
| Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon | W 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | SW 40 - 60 |
| Monday Night | SW 30 - 45 |
| Tuesday Morning | WSW 20 - 30 |
| Tuesday Afternoon | WNW 30 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | SW 40 - 60 |
| Monday Night | SW 35 - 50 |
| Tuesday Morning | WSW 30 - 45 |
| Tuesday Afternoon | W 30 - 45 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | SW 35 - 50 |
| Monday Night | SW 40 - 60 |
| Tuesday Morning | WSW 30 - 45 |
| Tuesday Afternoon | W 35 - 50 |
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: 2:58 PM PDT Monday, March 11, 2019
Extended Weather Synopsis for Wednesday night through Wednesday
In the long-range, spring-like weather will arrive. A high-pressure ridge will move into the region Wednesday night, bringing mostly sunny and weather on Thursday with milder conditions. A weakening front will fizzle and stay NW of the region Thursday night and Friday allowing the warm and dry weather to continue.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Freezing Level | 2000' - 3000' | 2000' - 3000' | 2500' - 3500' | |
| Thursday | Freezing Level | 2000' - 4000' | 2500' - 4500' | 3000' - 5000' | * |
| Thursday Night | Freezing Level | 3500' - 5000' | 4000' - 5000' | 5000' - 6000' | * |
| Friday | Freezing Level | 3000' - 5000' | 3500' - 5500' | 4000' - 6000' | * |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 2000' - 3000' |
| Thursday |
Freezing Level 2000' - 4000' (Easterly Flow *) |
| Thursday Night |
Freezing Level 3500' - 5000' (Easterly Flow *) |
| Friday |
Freezing Level 3000' - 5000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 2000' - 3000' |
| Thursday |
Freezing Level 2500' - 4500' (Easterly Flow *) |
| Thursday Night |
Freezing Level 4000' - 5000' (Easterly Flow *) |
| Friday |
Freezing Level 3500' - 5500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 2500' - 3500' |
| Thursday |
Freezing Level 3000' - 5000' (Easterly Flow *) |
| Thursday Night |
Freezing Level 5000' - 6000' (Easterly Flow *) |
| Friday |
Freezing Level 4000' - 6000' (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.
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 11, 2019
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