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 Friday
Updated 4:45 PM: Wind discussion.
A strong ridge of high pressure sits offshore on Sunday bringing a mostly sunny day to our region with dry NNW flow aloft and generally light winds at the surface. Popcorn cumulus clouds developed and banked up against the mountains with a strengthening W to E pressure gradient. Winds should peak in the evening hours with a pulse of energy bringing moderate NW winds to alpine areas, particularly in the central and east Cascades.
Cloud cover should generally clear quickly Sunday evening, providing a mostly clear and cool night. Inversion conditions are likely to develop into Monday morning, creating widespread low clouds in the Puget Sound lowlands and it is possible there is a slight chance that some of these will get sucked through the lower Cascade Passes such as Snoqualmie.
Monday should be warmer than Sunday in most locations with a freezing level making it up to 4000-5500 ft. By afternoon, any inversion should reverse, allowing weak cumulus clouds development once again.
A weak feature approaching in the NNW flow should bring increasing clouds Monday night with a chance of very light snow for the west and north Washington Cascades Tuesday, with the chances for snow moving southward Tuesday evening. Around an inch of snow accumulation is expected with snow levels hovering around 3000 ft. East of the Cascade Crest, expect some sunshine. Winds will pick up and should be light to moderate at Pass level but may be moderate to strong out of the WNW in the alpine.
Weather Forecast
Hurricane Ridge
| Sunday Night | Mostly clear at ridge level with low clouds or fog below 3000 ft. |
| Monday | Mostly sunny and mild with an inversion possible in the morning and then partly cloudy skies. |
Mt. Baker
| Sunday Night | Mostly clear with low clouds or fog likely developing below 3000 ft. |
| Monday | Mostly sunny and mild with an inversion possible in the morning and then partly cloudy skies. |
Washington Pass and Leavenworth
| Sunday Night | Mostly clear with low clouds or fog developing in the deeper valleys. |
| Monday | Mostly sunny and mild with an inversion possible in the morning and then partly cloudy skies. |
Stevens and Snoqualmie Pass
| Sunday Night | Mostly clear with low clouds or fog likely developing below 3000 ft. West wind 10-20 mph in the early evening decreasing to W 5-15. |
| Monday | Mostly sunny and mild with an inversion possible in the morning and then partly cloudy skies. |
Mt. Rainier, Crystal and White Pass
| Sunday Night | Mostly clear with low clouds or fog likely developing below 3000 ft. |
| Monday | Mostly sunny and mild with an inversion possible in the morning and then partly cloudy skies. |
Mt. Hood
| Sunday Night | Mostly clear with low clouds or fog likely developing below 3000 ft. |
| Monday | Mostly sunny and mild with an inversion possible in the morning and then partly cloudy skies. |
Issued: 4:51 PM PST Sunday, February 9, 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 | 4000' | 2000' | 2500' | 3500' | 3000' | 3000' | 3500' | 4500' |
| Sunday Night | Freezing Level | 3000' | 1000' | 1500' | 2000' | 1500' | 2000' | 2500' | 3500' |
| Monday Morning | Freezing Level | 3500' | 1000' | 2500' | 2500' | 2000' | 2000' | 3000' | 3500' |
| Monday Afternoon | Freezing Level | 5000' | 4000' | 5000' | 5000' | 4500' | 4500' | 5000' | 5500' |
| Monday Evening | Freezing Level | 6500' | 3500' | 4500' | 4500' | 4500' | 4000' | 5000' | 6500' |
| Monday Night | Snow Level | 7000' | 2500' | 3000' | 3500' | 3000' | 3000' | 4500' | 5500' |
| Tuesday Morning | Snow Level | 4500' | 1500' | 2000' | 3000' | 2000' | 2500' | 3000' | 5000' |
| Tuesday Afternoon | Snow Level | 3500' | 2000' | 3000' | 3500' | 3500' | 3000' | 3500' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 4000' |
| Sunday Night |
Freezing Level 3000' |
| Monday Morning |
Freezing Level 3500' |
| Monday Afternoon |
Freezing Level 5000' |
| Monday Evening |
Freezing Level 6500' |
| Monday Night |
Snow Level 7000' |
| Tuesday Morning |
Snow Level 4500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 2000' |
| Sunday Night |
Freezing Level 1000' |
| Monday Morning |
Freezing Level 1000' |
| Monday Afternoon |
Freezing Level 4000' |
| Monday Evening |
Freezing Level 3500' |
| Monday Night |
Snow Level 2500' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 2000' |
| Washington Pass | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 2500' |
| Sunday Night |
Freezing Level 1500' |
| Monday Morning |
Freezing Level 2500' |
| Monday Afternoon |
Freezing Level 5000' |
| Monday Evening |
Freezing Level 4500' |
| Monday Night |
Snow Level 3000' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 3000' |
| Leavenworth | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3500' |
| Sunday Night |
Freezing Level 2000' |
| Monday Morning |
Freezing Level 2500' |
| Monday Afternoon |
Freezing Level 5000' |
| Monday Evening |
Freezing Level 4500' |
| Monday Night |
Snow Level 3500' |
| Tuesday Morning |
Snow Level 3000' |
| Tuesday Afternoon |
Snow Level 3500' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3000' |
| Sunday Night |
Freezing Level 1500' |
| Monday Morning |
Freezing Level 2000' |
| Monday Afternoon |
Freezing Level 4500' |
| Monday Evening |
Freezing Level 4500' |
| Monday Night |
Snow Level 3000' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 3500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3000' |
| Sunday Night |
Freezing Level 2000' |
| Monday Morning |
Freezing Level 2000' |
| Monday Afternoon |
Freezing Level 4500' |
| Monday Evening |
Freezing Level 4000' |
| Monday Night |
Snow Level 3000' |
| Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Snow Level 3000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 3500' |
| Sunday Night |
Freezing Level 2500' |
| Monday Morning |
Freezing Level 3000' |
| Monday Afternoon |
Freezing Level 5000' |
| Monday Evening |
Freezing Level 5000' |
| Monday Night |
Snow Level 4500' |
| Tuesday Morning |
Snow Level 3000' |
| Tuesday Afternoon |
Snow Level 3500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening |
Freezing Level 4500' |
| Sunday Night |
Freezing Level 3500' |
| Monday Morning |
Freezing Level 3500' |
| Monday Afternoon |
Freezing Level 5500' |
| Monday Evening |
Freezing Level 6500' |
| Monday Night |
Snow Level 5500' |
| Tuesday Morning |
Snow Level 5000' |
| Tuesday Afternoon |
Snow Level 4500' |
* 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 | Friday | Friday Night | Friday | |
|---|---|---|---|---|
| 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 | LT 0.10 |
| Washington Pass | 0 | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | 0 | LT 0.10 |
| Snoqualmie Pass | 0 | 0 | 0 | LT 0.10 |
| 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 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| 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: 4:51 PM PST Sunday, February 9, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | N 5 - 15 | WSW 0 - 10 | WNW 5 - 15 | NW 5 - 15 | WNW 5 - 15 |
| Sunday Night | N 5 - 15 | NE 0 - 10 | W 0 - 10 | --- 0 - 10 | WSW 0 - 10 |
| Monday Morning | N 5 - 15 | ENE 0 - 10 | E 0 - 10 | ENE 0 - 10 | E 0 - 10 |
| Monday Afternoon | NNW 0 - 10 | E 0 - 10 | SE 0 - 10 | SSE 0 - 10 | E 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening | N 5 - 15 |
| Sunday Night | N 5 - 15 |
| Monday Morning | N 5 - 15 |
| Monday Afternoon | NNW 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening | WSW 0 - 10 |
| Sunday Night | NE 0 - 10 |
| Monday Morning | ENE 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | WNW 5 - 15 |
| Sunday Night | W 0 - 10 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | SE 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Evening | NW 5 - 15 |
| Sunday Night | --- 0 - 10 |
| Monday Morning | ENE 0 - 10 |
| Monday Afternoon | SSE 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | WNW 5 - 15 |
| Sunday Night | WSW 0 - 10 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Evening | N 5 - 15 |
| Sunday Night | N 5 - 15 |
| Monday Morning | N 5 - 15 |
| Monday Afternoon | NNW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | WSW 0 - 10 |
| Sunday Night | NE 0 - 10 |
| Monday Morning | ENE 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | WNW 5 - 15 |
| Sunday Night | W 0 - 10 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | SE 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | NW 5 - 15 |
| Sunday Night | --- 0 - 10 |
| Monday Morning | ENE 0 - 10 |
| Monday Afternoon | SSE 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | WNW 5 - 15 |
| Sunday Night | WSW 0 - 10 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | E 0 - 10 |
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 | NW 20 - 30 | NW 20 - 30 | NNW 30 - 40 | NNW 20 - 30 | N 10 - 20 |
| Sunday Night | NNW 20 - 30 | NNW 20 - 30 | NNW 25 - 35 | NNW 20 - 30 | NNW 15 - 25 |
| Monday Morning | N 10 - 20 | NNW 15 - 25 | NNW 10 - 20 | NNW 15 - 25 | N 10 - 20 |
| Monday Afternoon | NW 10 - 20 | WNW 10 - 20 | NNW 10 - 20 | NW 10 - 20 | N 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | NW 20 - 30 |
| Sunday Night | NNW 20 - 30 |
| Monday Morning | N 10 - 20 |
| Monday Afternoon | NW 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Evening | NW 20 - 30 |
| Sunday Night | NNW 20 - 30 |
| Monday Morning | NNW 15 - 25 |
| Monday Afternoon | WNW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | NNW 30 - 40 |
| Sunday Night | NNW 25 - 35 |
| Monday Morning | NNW 10 - 20 |
| Monday Afternoon | NNW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | NNW 20 - 30 |
| Sunday Night | NNW 20 - 30 |
| Monday Morning | NNW 15 - 25 |
| Monday Afternoon | NW 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | N 10 - 20 |
| Sunday Night | NNW 15 - 25 |
| Monday Morning | N 10 - 20 |
| Monday Afternoon | N 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.
Issued: 4:51 PM PST Sunday, February 9, 2020
Extended Weather Synopsis for Friday night through Friday
Weak ridging generally cuts off snow shower activity late Tuesday night into Wednesday with seasonable temperatures expected. Clouds increase Wednesday evening ahead of a stronger system also arriving on a NW flow and bringing moderate snowfall and some cooling Wednesday night through Thursday morning. Post-frontal shower activity should sustain snow showers Thursday afternoon with a trough digging in over the region.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Night | Snow Level | 1500' - 2500' | 2000' - 3000' | 3000' - 4000' | |
| Wednesday | Freezing Level | 2500' - 3500' | 3500' - 4500' | 4000' - 5000' | |
| Wednesday Night | Snow Level | 2000' - 3000' | 2500' - 3500' | 2500' - 3500' | |
| Thursday | Snow Level | 2000' - 3000' | 2500' - 3500' | 3000' - 4500' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Night |
Snow Level 1500' - 2500' |
| Wednesday |
Freezing Level 2500' - 3500' |
| Wednesday Night |
Snow Level 2000' - 3000' |
| Thursday |
Snow Level 2000' - 3000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night |
Snow Level 2000' - 3000' |
| Wednesday |
Freezing Level 3500' - 4500' |
| Wednesday Night |
Snow Level 2500' - 3500' |
| Thursday |
Snow Level 2500' - 3500' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Freezing Level 4000' - 5000' |
| Wednesday Night |
Snow Level 2500' - 3500' |
| Thursday |
Snow Level 3000' - 4500' |
* 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 9, 2020
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