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 Saturday
A weak high pressure arrives Monday night as frontal boundaries ride over the top. The first will weaken and fizzle Monday night, bringing clouds and a chance of very light precipitation to the Olympics and Mt. Baker area by Tuesday morning. The second, a far more significant and moisture-laden frontal system, will bring a warm front into the region during the day on Tuesday while the associated low tracks toward the north end of Vancouver Island. The system will spread snow, which will eventually change to rain in many low to mid elevation areas later Tuesday and Tuesday night. We expect a changeover to rain at Snoqualmie in the early evening, Stevens later in the evening, and Mt. Baker base after midnight. Increased precipitation will occur throughout the day on Tuesday, continuing Tuesday night as the low tracks WSW toward Washington State.
Tuesday evening, the heaviest precipitation will hit the west slopes of the Cascades north of Stevens Pass on an SW flow before targeting the entire west slopes as the flow shifts westerly. On Wednesday, light post-frontal snow showers, heaviest in possible convergence bands near or north of Stevens will decrease. Storm totals of 1-2" of snow water equivalent are forecast throughout the west slopes of the Cascades by the end of the day on Wednesday. Don't expect much cooling behind this storm as a ridge offshore keeps warm air moving over the region.
Weather Forecast
Hurricane Ridge
| Monday Night | High clouds lowering and thickening with a chance of light snow by morning. Light winds becoming moderate. |
| Tuesday | Light snow changing to rain. Rapidly rising snow levels. |
Mt. Baker
| Monday Night | High clouds lowering and thickening with a chance of light snow by morning. Light winds becoming light to moderate. |
| Tuesday | Moderate snow. Gradual warming. |
Washington Pass and Leavenworth
| Monday Night | High clouds lowering and thickening with a chance of light snow by morning. Light winds becoming light to moderate. |
| Tuesday | Increasing light snow. Gradual warming. Moderate wind. |
Stevens and Snoqualmie Pass
| Monday Night | High clouds lowering and thickening by morning. Light ridge-top winds becoming light to moderate. Light westerly winds at pass level. |
| Tuesday | Moderate snow, possibly mixing with rain at Snoqualmie Pass very late in the day. Light to moderate ridge-top wind becoming moderate with strong gusts in the afternoon. Light and variable winds at pass level. |
Mt. Rainier, Crystal and White Pass
| Monday Night | High clouds lowering and thickening by morning. Increasing light wind. |
| Tuesday | Increasing light snow at Crystal. Increasing light snow becoming light to moderate at White Pass. Increasing light to moderate snow becoming moderate to heavy in the afternoon at Paradise. Increasing moderate wind. |
Mt. Hood
| Monday Night | High clouds lowering and thickening by morning. Light to moderate wind. |
| Tuesday | Cloudy with a chance of flurries in the morning. Light to moderate snow increasing in the afternoon. Moderate wind becoming moderate to strong in the afternoon. |
Issued: 2:50 PM PST Monday, January 21, 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 | Freezing Level | 3500' | 2000' | 1000' | 1500' | 1500' | 2000' | 2500' | 2500' |
| Monday Night | Snow Level | 2000' | 1500' | 0' | 1000' | 1000' | 1500' | 2000' | 1500' |
| Tuesday Morning | Snow Level | 4500' | 2000' | 1500' | 2000' | 2000' | 2500' | 3000' | 3000' |
| Tuesday Afternoon | Snow Level | 6000' | 2500' | 2500' | 3000' | 3500' | 3500' | 4000' | 5500' |
| Tuesday Evening | Snow Level | 6500' | 4500' | 3000' | 4500' | 4500' | 5500' | 5500' | 5500' |
| Tuesday Night | Snow Level | 5000' | 4500' | 4000' | 5500' | 4500' | 5000' | 5500' | 6500' |
| Wednesday Morning | Snow Level | 5000' | 4000' | 4000' | 4500' | 4000' | 4000' | 4500' | 5500' |
| Wednesday Afternoon | Snow Level | 6000' | 3000' | 2500' | 4000' | 3500' | 3500' | 3500' | 6500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Freezing Level 3500' |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Snow Level 4500' |
| Tuesday Afternoon |
Snow Level 6000' |
| Tuesday Evening |
Snow Level 6500' |
| Tuesday Night |
Snow Level 5000' |
| Wednesday Morning |
Snow Level 5000' |
| Wednesday Afternoon |
Snow Level 6000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 2500' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 4500' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 3000' |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 1000' |
| Monday Night |
Snow Level 0' |
| Tuesday Morning |
Snow Level 1500' |
| Tuesday Afternoon |
Snow Level 2500' |
| Tuesday Evening |
Snow Level 3000' |
| Tuesday Night |
Snow Level 4000' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 2500' |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Freezing Level 1500' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 3000' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 5500' |
| Wednesday Morning |
Snow Level 4500' |
| Wednesday Afternoon |
Snow Level 4000' |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 1500' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 2000' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Evening |
Snow Level 4500' |
| Tuesday Night |
Snow Level 4500' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 3500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 2500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Evening |
Snow Level 5500' |
| Tuesday Night |
Snow Level 5000' |
| Wednesday Morning |
Snow Level 4000' |
| Wednesday Afternoon |
Snow Level 3500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Freezing Level 2500' |
| Monday Night |
Snow Level 2000' |
| Tuesday Morning |
Snow Level 3000' |
| Tuesday Afternoon |
Snow Level 4000' |
| Tuesday Evening |
Snow Level 5500' |
| Tuesday Night |
Snow Level 5500' |
| Wednesday Morning |
Snow Level 4500' |
| Wednesday Afternoon |
Snow Level 3500' |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Freezing Level 2500' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 3000' |
| Tuesday Afternoon |
Snow Level 5500' |
| Tuesday Evening |
Snow Level 5500' |
| Tuesday Night |
Snow Level 6500' |
| Wednesday Morning |
Snow Level 5500' |
| Wednesday Afternoon |
Snow 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
| Monday Night | Saturday | Saturday Night | Saturday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | 0.25 | 0.50 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | 0.75 | 1.00 | LT 0.25 |
| Washington Pass | 0 | LT 0.25 | 0.50 - 0.75 | LT 0.25 |
| Leavenworth | 0 | LT 0.10 | 0.25 | LT 0.10 |
| Stevens Pass | 0 | 0.50 - 0.75 | 0.75 -1.00 | 0.25 |
| Snoqualmie Pass | 0 | 0.75 | 1.00 | 0.25 |
| Mission Ridge | 0 | LT 0.10 | 0.25 | LT 0.10 |
| Crystal Mt | 0 | 0.25 | 0.25 | LT 0.10 |
| Paradise | 0 | 1.00 | 1.50 | 0.50 |
| White Pass | 0 | 0.50 | 0.50 | LT 0.25 |
| Mt Hood Meadows | 0 | 0.25 - 0.50 | 1.00 | 0.50 - 0.75 |
| Timberline | 0 | 0.25 - 0.50 | 1.00 - 1.50 | 75.00 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Saturday | 0.25 |
| Saturday Night | 0.50 |
| Saturday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Saturday | 0.75 |
| Saturday Night | 1.00 |
| Saturday | LT 0.25 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | LT 0.25 |
| Saturday Night | 0.50 - 0.75 |
| Saturday | LT 0.25 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 |
| Saturday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | 0.50 - 0.75 |
| Saturday Night | 0.75 -1.00 |
| Saturday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | 0.75 |
| Saturday Night | 1.00 |
| Saturday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 |
| Saturday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | 0.25 |
| Saturday Night | 0.25 |
| Saturday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | 1.00 |
| Saturday Night | 1.50 |
| Saturday | 0.50 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | 0.50 |
| Saturday Night | 0.50 |
| Saturday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | 0.25 - 0.50 |
| Saturday Night | 1.00 |
| Saturday | 0.50 - 0.75 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Saturday | 0.25 - 0.50 |
| Saturday Night | 1.00 - 1.50 |
| Saturday | 75.00 |
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: 2:50 PM PST Monday, January 21, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | SSW 5 - 15 | SSW 5 - 15 | WSW 5 - 15 | WSW 5 - 15 | W 10 - 20 |
| Monday Night | S 15 - 25 | SSW 10 - 20 | WSW 10 - 20 | WSW 10 - 20 | WSW 10 - 20 |
| Tuesday Morning | SSW 20 - 30 | S 10 - 20 | WSW 10 - 20 | SW 10 - 20 | SW 15 - 25 |
| Tuesday Afternoon | WSW 25 - 35 | SSE 10 - 20 | SW 25 - 35 | SW 25 - 35 | WSW 25 - 35 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | SSW 5 - 15 |
| Monday Night | S 15 - 25 |
| Tuesday Morning | SSW 20 - 30 |
| Tuesday Afternoon | WSW 25 - 35 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | SSW 5 - 15 |
| Monday Night | SSW 10 - 20 |
| Tuesday Morning | S 10 - 20 |
| Tuesday Afternoon | SSE 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | WSW 5 - 15 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon | SW 25 - 35 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | WSW 5 - 15 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | SW 10 - 20 |
| Tuesday Afternoon | SW 25 - 35 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | W 10 - 20 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | WSW 25 - 35 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | SSW 5 - 15 |
| Monday Night | S 15 - 25 |
| Tuesday Morning | SSW 20 - 30 |
| Tuesday Afternoon | WSW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | SSW 5 - 15 |
| Monday Night | SSW 10 - 20 |
| Tuesday Morning | S 10 - 20 |
| Tuesday Afternoon | SSE 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | WSW 5 - 15 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon | SW 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | WSW 5 - 15 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | SW 10 - 20 |
| Tuesday Afternoon | SW 25 - 35 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | W 10 - 20 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | WSW 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 | WSW 15 - 25 | WSW 10 - 20 | WNW 20 - 30 | WNW 15 - 25 | NW 15 - 25 |
| Monday Night | WSW 30 - 45 | WSW 25 - 35 | W 30 - 45 | W 30 - 45 | W 20 - 30 |
| Tuesday Morning | WSW 35 - 50 | W 35 - 50 | W 30 - 45 | W 30 - 45 | W 25 - 35 |
| Tuesday Afternoon | SW 25 - 35 | SW 20 - 30 | WSW 50 - 70 | W 50 - 70 | W 40 - 60 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | WSW 15 - 25 |
| Monday Night | WSW 30 - 45 |
| Tuesday Morning | WSW 35 - 50 |
| Tuesday Afternoon | SW 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | WSW 10 - 20 |
| Monday Night | WSW 25 - 35 |
| Tuesday Morning | W 35 - 50 |
| Tuesday Afternoon | SW 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | WNW 20 - 30 |
| Monday Night | W 30 - 45 |
| Tuesday Morning | W 30 - 45 |
| Tuesday Afternoon | WSW 50 - 70 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | WNW 15 - 25 |
| Monday Night | W 30 - 45 |
| Tuesday Morning | W 30 - 45 |
| Tuesday Afternoon | W 50 - 70 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | NW 15 - 25 |
| Monday Night | W 20 - 30 |
| Tuesday Morning | W 25 - 35 |
| Tuesday Afternoon | W 40 - 60 |
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: 2:50 PM PST Monday, January 21, 2019
Extended Weather Synopsis for Saturday night through Saturday
Wednesday night, the post-frontal showers will end and skies will be clearing. Temperatures will remain mild as a warm ridge of high pressure lingers just offshore.
On Thurday through Friday, the ridge moves slightly further onshore as we experience unseasonably mild, mostly clear weather, particularly for the southern parts of the forecast region with weak systems trying to move over the top of the ridge into British Columbia, bringing us some clouds in the north.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Snow Level | 2000' - 4000' | 3000' - 4000' | 5000' - 6000' | |
| Thursday | Freezing Level | 2500' - 4500' | 5000' - 7000' | 7500' - 9500' | |
| Thursday Night | Freezing Level | 3000' - 5000' | 4500' - 6500' | 9000' - 1000' | |
| Friday | Freezing Level | 3500' - 5500' | 4000' - 6000' | 9000' - 10000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Snow Level 2000' - 4000' |
| Thursday |
Freezing Level 2500' - 4500' |
| Thursday Night |
Freezing Level 3000' - 5000' |
| Friday |
Freezing Level 3500' - 5500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Snow Level 3000' - 4000' |
| Thursday |
Freezing Level 5000' - 7000' |
| Thursday Night |
Freezing Level 4500' - 6500' |
| Friday |
Freezing Level 4000' - 6000' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Snow Level 5000' - 6000' |
| Thursday |
Freezing Level 7500' - 9500' |
| Thursday Night |
Freezing Level 9000' - 1000' |
| Friday |
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 Jan 21, 2019
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