Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Thursday night through Friday
A moist SW flow with a subtropical source, combined with a stalled and weakening frontal system will keep a wet weather pattern through the day on Friday. The weakly organized rain activity ahead of the front has been taking aim at NW Washington and coastal British Columbia while bringing warm temperatures (8000-10000 ft snow levels) and light to moderate winds to the region. The precipitation should focus on the N Cascades during the evening hours, extending southward as a ridge flattens across the region. The surface front is expected reach the Olympic Coastline by early morning, crossing the Cascades from NW to SE during the day on Friday, allowing precipitation, winds, and temperatures to decrease with the frontal passage. Snow levels should drop to 5000 ft in the Baker area and 8000 ft in the Mt. Hood area by early evening as an upper trough works into the region.
Friday night, the upper trough moves over the region as the front exits, but a drying northerly flow should quickly shut off the precipitation, which should remain should generally fall as rain at pass level, with a dusting to a few inches of snow possible mid-elevations along parts of the west slopes of the Cascades.
On Saturday, ridging begins rebuilding offshore and edges into the region, bringing fairer weather wither and lingering clouds giving way to sunshine in many (but not all) areas.
Weather Forecast
Hurricane Ridge
Thursday Night | Decreasing light periods of rain. Unseasonably mild. Moderate winds. |
Friday | Light rain showers. Mild early with cooling temperatures. Decreasing light to moderate winds. |
Mt. Baker
Thursday Night | Light to moderate periods of rain, heaviest in the evening. Unseasonably mild. Moderate winds. |
Friday | Light to moderate rain showers decreasing and possibly ending in the afternoon. Mild early with cooling temperatures. Decreasing light to moderate winds. |
Washington Pass and Leavenworth
Thursday Night | Light to moderate periods of rain near the Cascade Crest with lighter rain further east. Unseasonably mild. Light to moderate winds. |
Friday | Light periods of rain in the morning becoming showery and decreasing in the afternoon. Snow levels should remain above Washington Pass level. Precipitation decreases rapidly east of the Cascade Crest. Mild, but cooling slightly. Light winds. |
Stevens and Snoqualmie Pass
Thursday Night | Slightly increasing light to occasionally moderate periods of rain. Unseasonably mild. Moderate 5000 ft winds, light generally W wind at pass level. |
Friday | Light to moderate periods of rain decreasing in the afternoon and becoming showery, but possibly locally enhanced in weak convergence bands focused on the central Cascades. Mild early with cooling temperatures. Decreasing light to moderate winds. |
Mt. Rainier, Crystal and White Pass
Thursday Night | Slightly increasing light to occasionally moderate periods of rain. Unseasonably mild. Light winds. |
Friday | Light to moderate periods of rain decreasing in the afternoon and becoming showery. Mild early with cooling temperatures. Decreasing light to moderate winds at 5000 ft with light to moderate W wind at pass level. |
Mt. Hood
Thursday Night | High clouds lowering and thickening. Unseasonably mild. Light winds. |
Friday | Cloudy with a periods of light to moderate rain, most likely in the afternoon. Unseasonably mild. Light winds. |
Issued: 2:53 PM PDT Thursday, April 18, 2019
Snow/Freezing Level (ft)
Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
---|---|---|---|---|---|---|---|---|---|
Thursday Evening | Snow Level | 8500' | 8000' | 9000' | 9500' | 9000' | 9000' | 9500' | 10000' |
Thursday Night | Snow Level | 8000' | 8000' | 8500' | 9000' | 8500' | 9000' | 9000' | 10500' |
Friday Morning | Snow Level | 6500' | 7000' | 7500' | 8500' | 8000' | 8000' | 8000' | 10000' |
Friday Afternoon | Snow Level | 5000' | 5500' | 6500' | 7000' | 6500' | 6500' | 7000' | 8500' |
Friday Evening | Snow Level | 5000' | 5000' | 6000' | 6500' | 5500' | 5500' | 6000' | 7500' |
Friday Night | Snow Level | 5000' | 3500' | 4500' | 5500' | 4500' | 4500' | 5000' | 7000' |
Saturday Morning | Freezing Level | 5500' | 4500' | 5000' | 6000' | 5000' | 5000' | 5000' | 6500' |
Saturday Afternoon | Freezing Level | 6500' | 6000' | 6500' | 6500' | 6500' | 6500' | 6500' | 6500' |
Hurricane Ridge | Elevation |
---|---|
Thursday Evening |
Snow Level 8500' |
Thursday Night |
Snow Level 8000' |
Friday Morning |
Snow Level 6500' |
Friday Afternoon |
Snow Level 5000' |
Friday Evening |
Snow Level 5000' |
Friday Night |
Snow Level 5000' |
Saturday Morning |
Freezing Level 5500' |
Saturday Afternoon |
Freezing Level 6500' |
Mt. Baker | Elevation |
---|---|
Thursday Evening |
Snow Level 8000' |
Thursday Night |
Snow Level 8000' |
Friday Morning |
Snow Level 7000' |
Friday Afternoon |
Snow Level 5500' |
Friday Evening |
Snow Level 5000' |
Friday Night |
Snow Level 3500' |
Saturday Morning |
Freezing Level 4500' |
Saturday Afternoon |
Freezing Level 6000' |
Washington Pass | Elevation |
---|---|
Thursday Evening |
Snow Level 9000' |
Thursday Night |
Snow Level 8500' |
Friday Morning |
Snow Level 7500' |
Friday Afternoon |
Snow Level 6500' |
Friday Evening |
Snow Level 6000' |
Friday Night |
Snow Level 4500' |
Saturday Morning |
Freezing Level 5000' |
Saturday Afternoon |
Freezing Level 6500' |
Leavenworth | Elevation |
---|---|
Thursday Evening |
Snow Level 9500' |
Thursday Night |
Snow Level 9000' |
Friday Morning |
Snow Level 8500' |
Friday Afternoon |
Snow Level 7000' |
Friday Evening |
Snow Level 6500' |
Friday Night |
Snow Level 5500' |
Saturday Morning |
Freezing Level 6000' |
Saturday Afternoon |
Freezing Level 6500' |
Stevens Pass | Elevation |
---|---|
Thursday Evening |
Snow Level 9000' |
Thursday Night |
Snow Level 8500' |
Friday Morning |
Snow Level 8000' |
Friday Afternoon |
Snow Level 6500' |
Friday Evening |
Snow Level 5500' |
Friday Night |
Snow Level 4500' |
Saturday Morning |
Freezing Level 5000' |
Saturday Afternoon |
Freezing Level 6500' |
Snoqualmie Pass | Elevation |
---|---|
Thursday Evening |
Snow Level 9000' |
Thursday Night |
Snow Level 9000' |
Friday Morning |
Snow Level 8000' |
Friday Afternoon |
Snow Level 6500' |
Friday Evening |
Snow Level 5500' |
Friday Night |
Snow Level 4500' |
Saturday Morning |
Freezing Level 5000' |
Saturday Afternoon |
Freezing Level 6500' |
Mt. Rainier & Crystal | Elevation |
---|---|
Thursday Evening |
Snow Level 9500' |
Thursday Night |
Snow Level 9000' |
Friday Morning |
Snow Level 8000' |
Friday Afternoon |
Snow Level 7000' |
Friday Evening |
Snow Level 6000' |
Friday Night |
Snow Level 5000' |
Saturday Morning |
Freezing Level 5000' |
Saturday Afternoon |
Freezing Level 6500' |
Mt. Hood | Elevation |
---|---|
Thursday Evening |
Snow Level 10000' |
Thursday Night |
Snow Level 10500' |
Friday Morning |
Snow Level 10000' |
Friday Afternoon |
Snow Level 8500' |
Friday Evening |
Snow Level 7500' |
Friday Night |
Snow Level 7000' |
Saturday Morning |
Freezing Level 6500' |
Saturday Afternoon |
Freezing Level 6500' |
* 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
Thursday Night | Friday | Friday Night | Friday | |
---|---|---|---|---|
4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
Hurricane Ridge | 0.25 | LT 0.25 | 0 | 0 |
Mt Baker Ski Area | 0.50 | 0.25 - 0.50 | 0 | 0 |
Washington Pass | 0.25 - 0.50 | LT 0.25 | 0 | 0 |
Leavenworth | LT 0.10 | LT 0.10 | 0 | 0 |
Stevens Pass | 0.25 - 0.50 | 0.25 - 0.50 | LT 0.10 | 0 |
Snoqualmie Pass | 0.25 - 0.50 | 0.25 - 0.50 | LT 0.10 | 0 |
Mission Ridge | 0 | 0 | 0 | 0 |
Crystal Mt | LT 0.10 | LT 0.25 | LT 0.10 | 0 |
Paradise | 0.25 - 0.50 | 0.25 | 0 | 0 |
White Pass | LT 0.10 | LT 0.25 | 0 | 0 |
Mt Hood Meadows | 0 | 0.25 | 0 | 0 |
Timberline | 0 | 0.25 | LT 0.10 | 0 |
Hurricane Ridge | Precipitation Forecast |
---|---|
Thursday Night | 0.25 |
Friday | LT 0.25 |
Friday Night | 0 |
Friday | 0 |
Mt Baker Ski Area | Precipitation Forecast |
---|---|
Thursday Night | 0.50 |
Friday | 0.25 - 0.50 |
Friday Night | 0 |
Friday | 0 |
Washington Pass | Precipitation Forecast |
---|---|
Thursday Night | 0.25 - 0.50 |
Friday | LT 0.25 |
Friday Night | 0 |
Friday | 0 |
Leavenworth | Precipitation Forecast |
---|---|
Thursday Night | LT 0.10 |
Friday | LT 0.10 |
Friday Night | 0 |
Friday | 0 |
Stevens Pass | Precipitation Forecast |
---|---|
Thursday Night | 0.25 - 0.50 |
Friday | 0.25 - 0.50 |
Friday Night | LT 0.10 |
Friday | 0 |
Snoqualmie Pass | Precipitation Forecast |
---|---|
Thursday Night | 0.25 - 0.50 |
Friday | 0.25 - 0.50 |
Friday Night | LT 0.10 |
Friday | 0 |
Mission Ridge | Precipitation Forecast |
---|---|
Thursday Night | 0 |
Friday | 0 |
Friday Night | 0 |
Friday | 0 |
Crystal Mt | Precipitation Forecast |
---|---|
Thursday Night | LT 0.10 |
Friday | LT 0.25 |
Friday Night | LT 0.10 |
Friday | 0 |
Paradise | Precipitation Forecast |
---|---|
Thursday Night | 0.25 - 0.50 |
Friday | 0.25 |
Friday Night | 0 |
Friday | 0 |
White Pass | Precipitation Forecast |
---|---|
Thursday Night | LT 0.10 |
Friday | LT 0.25 |
Friday Night | 0 |
Friday | 0 |
Mt Hood Meadows | Precipitation Forecast |
---|---|
Thursday Night | 0 |
Friday | 0.25 |
Friday Night | 0 |
Friday | 0 |
Timberline | Precipitation Forecast |
---|---|
Thursday Night | 0 |
Friday | 0.25 |
Friday Night | LT 0.10 |
Friday | 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: 2:53 PM PDT Thursday, April 18, 2019
Free Winds at 5000' (mph)
Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
---|---|---|---|---|---|
Thursday Evening | SW 15 - 25 | S 15 - 25 | SW 15 - 25 | SW 10 - 20 | WSW 10 - 20 |
Thursday Night | SW 15 - 25 | SSW 15 - 25 | SW 15 - 25 | SW 15 - 25 | SW 15 - 25 |
Friday Morning | WSW 15 - 25 | WSW 15 - 25 | WSW 15 - 25 | WSW 10 - 20 | WSW 15 - 25 |
Friday Afternoon | W 10 - 20 | WSW 10 - 20 | WSW 10 - 20 | WSW 10 - 20 | W 15 - 25 |
Hurricane Ridge | Elevation |
---|---|
Thursday Evening | SW 15 - 25 |
Thursday Night | SW 15 - 25 |
Friday Morning | WSW 15 - 25 |
Friday Afternoon | W 10 - 20 |
Mt. Baker | Elevation |
---|---|
Thursday Evening | S 15 - 25 |
Thursday Night | SSW 15 - 25 |
Friday Morning | WSW 15 - 25 |
Friday Afternoon | WSW 10 - 20 |
Stevens and Snoqualmie Pass | Elevation |
---|---|
Thursday Evening | SW 15 - 25 |
Thursday Night | SW 15 - 25 |
Friday Morning | WSW 15 - 25 |
Friday Afternoon | WSW 10 - 20 |
Mt. Rainier | Elevation |
---|---|
Thursday Evening | SW 10 - 20 |
Thursday Night | SW 15 - 25 |
Friday Morning | WSW 10 - 20 |
Friday Afternoon | WSW 10 - 20 |
Mt. Hood | Elevation |
---|---|
Thursday Evening | WSW 10 - 20 |
Thursday Night | SW 15 - 25 |
Friday Morning | WSW 15 - 25 |
Friday Afternoon | W 15 - 25 |
Hurricane Ridge | Direction - Speed |
---|---|
Thursday Evening | SW 15 - 25 |
Thursday Night | SW 15 - 25 |
Friday Morning | WSW 15 - 25 |
Friday Afternoon | W 10 - 20 |
Mt. Baker | Direction - Speed |
---|---|
Thursday Evening | S 15 - 25 |
Thursday Night | SSW 15 - 25 |
Friday Morning | WSW 15 - 25 |
Friday Afternoon | WSW 10 - 20 |
Stevens and Snoqualmie Pass | Direction - Speed |
---|---|
Thursday Evening | SW 15 - 25 |
Thursday Night | SW 15 - 25 |
Friday Morning | WSW 15 - 25 |
Friday Afternoon | WSW 10 - 20 |
Mt. Rainier | Direction - Speed |
---|---|
Thursday Evening | SW 10 - 20 |
Thursday Night | SW 15 - 25 |
Friday Morning | WSW 10 - 20 |
Friday Afternoon | WSW 10 - 20 |
Mt. Hood | Direction - Speed |
---|---|
Thursday Evening | WSW 10 - 20 |
Thursday Night | SW 15 - 25 |
Friday Morning | WSW 15 - 25 |
Friday Afternoon | 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.
Free Winds at 9000' (mph)
Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
---|---|---|---|---|---|
Thursday Evening | WSW 35 - 50 | WSW 35 - 50 | WSW 40 - 60 | WSW 35 - 50 | SW 30 - 45 |
Thursday Night | SW 40 - 60 | SW 35 - 50 | SW 40 - 60 | SW 40 - 60 | SW 40 - 60 |
Friday Morning | SW 30 - 45 | WSW 40 - 60 | WSW 40 - 60 | WSW 35 - 50 | WSW 35 - 50 |
Friday Afternoon | WSW 20 - 30 | WSW 30 - 45 | W 30 - 45 | W 30 - 45 | WSW 30 - 45 |
Mt. Baker | Direction - Speed |
---|---|
Thursday Evening | WSW 35 - 50 |
Thursday Night | SW 40 - 60 |
Friday Morning | SW 30 - 45 |
Friday Afternoon | WSW 20 - 30 |
Washington Pass | Direction - Speed |
---|---|
Thursday Evening | WSW 35 - 50 |
Thursday Night | SW 35 - 50 |
Friday Morning | WSW 40 - 60 |
Friday Afternoon | WSW 30 - 45 |
Stevens and Snoqualmie Pass | Direction - Speed |
---|---|
Thursday Evening | WSW 40 - 60 |
Thursday Night | SW 40 - 60 |
Friday Morning | WSW 40 - 60 |
Friday Afternoon | W 30 - 45 |
Mt. Rainier | Direction - Speed |
---|---|
Thursday Evening | WSW 35 - 50 |
Thursday Night | SW 40 - 60 |
Friday Morning | WSW 35 - 50 |
Friday Afternoon | W 30 - 45 |
Mt. Hood | Direction - Speed |
---|---|
Thursday Evening | SW 30 - 45 |
Thursday Night | SW 40 - 60 |
Friday Morning | WSW 35 - 50 |
Friday Afternoon | WSW 30 - 45 |
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: 2:53 PM PDT Thursday, April 18, 2019
Extended Weather Synopsis for Friday night through Friday
A wedge-shaped ridge should dominate the weather pattern from Saturday night through Monday, with above normal temperatures and a gradual warming trend throughout the period. Expect a good deal of sunshine through Sunday night. Clouds are expected to increase on Monday ahead of the next system approaching from the NW and possibly bringing some light rain into parts of the region by late in the day.
Extended Snow/Freezing Levels
Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
---|---|---|---|---|---|
Saturday Night | Freezing Level | 6500' - 7500' | 6500' - 7500' | 6500' - 7500' | |
Sunday | Freezing Level | 6000' - 7000' | 6500' - 7500' | 7000' - 8000' | |
Sunday Night | Freezing Level | 6500' - 7500' | 7000' - 8000' | 8500' - 9500' | |
Monday | Freezing Level | 5500' - 6500' | 7000' - 8000' | 9000' - 10000' |
Mt. Baker | Elevation |
---|---|
Saturday Night |
Freezing Level 6500' - 7500' |
Sunday |
Freezing Level 6000' - 7000' |
Sunday Night |
Freezing Level 6500' - 7500' |
Monday |
Freezing Level 5500' - 6500' |
Snoqualmie Pass | Elevation |
---|---|
Saturday Night |
Freezing Level 6500' - 7500' |
Sunday |
Freezing Level 6500' - 7500' |
Sunday Night |
Freezing Level 7000' - 8000' |
Monday |
Freezing Level 7000' - 8000' |
Mt. Hood | Elevation |
---|---|
Saturday Night |
Freezing Level 6500' - 7500' |
Sunday |
Freezing Level 7000' - 8000' |
Sunday Night |
Freezing Level 8500' - 9500' |
Monday |
Freezing Level 9000' - 10000' |
* 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 Apr 17, 2019
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