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 & Tuesday
Weather disturbances traveling along a W-SW frontal boundary will deliver several waves of moisture to the Pacific Northwest with mild snow levels over the next two days. A strong westerly jet will be aimed into southern British Columbia over this time period as well.
Precipitation associated with a not-so-cold cold front currently focused on the Olympics and northwest Cascades this morning should sink south into the southern Washington Cascades and Oregon later today. Warm frontal moisture will lift back north tonight through Tuesday morning.
A relative lull in precipitation may be seen Tuesday afternoon before steadier rain and snow fills back in again Tuesday night. The highest precipitation totals (mostly rain) and the strongest W-SW alpine winds are expected from the central Washington Cascades and south to Mt. Hood.
Weather Forecast
Olympics
| Monday |
Moderate rain and snow becoming light in the afternoon. |
| Monday Night - Tuesday Morning |
Periods of light rain and snow increasing to light to moderate in the morning. |
| Tuesday Afternoon |
Cloudy with periods of light rain and snow. |
| Tuesday Night |
Moderate rain and snow. |
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday |
Moderate to occasionally heavy rain and snow shifting south during the day. |
| Monday Night - Tuesday Morning |
Periods of light rain and snow increasing from south to north and becoming moderate to occasionally heavy overnight. |
| Tuesday Afternoon |
Cloudy with periods of light rain and snow. |
| Tuesday Night |
Moderate rain and snow. |
East slopes of the Washington Cascades
| Monday |
Light to moderate rain and snow shifting south during the day. Warming trend. |
| Monday Night - Tuesday Morning |
Periods of light rain and snow increasing from south to north and occasionally becoming moderate overnight. |
| Tuesday Afternoon |
Mostly cloudy with periods of light rain and snow. |
| Tuesday Night |
Light to moderate rain and snow. |
Mt. Hood Area
| Monday - Monday Evening |
Light rain and snow developing in the morning and becoming moderate to occasionally heavy in the afternoon and evening. |
| Monday Night - Tuesday Morning |
Light rain and snow. |
| Tuesday Afternoon |
Light to moderate rain and snow. |
| Tuesday Night |
Light rain and snow tapering down overnight and becoming mostly cloudy. |
Issued: 2:48 PM PDT Monday, March 13, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Afternoon | Snow Level | 6500' | 6000' | 6000' | ' | ' | 6500' | ' | 8500' |
| Monday Night - Tuesday Morning | Snow Level | 6500' | 6000' | 6000' | ' | ' | 7000' | ' | 8500' |
| Tuesday Afternoon - Tuesday Night | Snow Level * | 7000' | 6500' | 6500' | ' | ' | 7000' | ' | 8000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 6500' |
| Monday Night - Tuesday Morning |
Snow Level 6500' |
| Tuesday Afternoon - Tuesday Night |
Snow Level 7000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 6000' |
| Monday Night - Tuesday Morning |
Snow Level 6000' |
| Tuesday Afternoon - Tuesday Night |
Snow Level 6500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 6000' |
| Monday Night - Tuesday Morning |
Snow Level 6000' |
| Tuesday Afternoon - Tuesday Night |
Snow Level 6500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon - Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon - Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 6500' |
| Monday Night - Tuesday Morning |
Snow Level 7000' |
| Tuesday Afternoon - Tuesday Night |
Snow Level 7000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Afternoon |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon - Tuesday Night |
Snow Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon |
Snow Level 8500' |
| Monday Night - Tuesday Morning |
Snow Level 8500' |
| Tuesday Afternoon - Tuesday Night |
Snow Level 8000' (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.
Precipitation Forecast
| Tuesday | Tuesday | |
|---|---|---|
| Hurricane Ridge | 0 - 0.75 | 0.25 - 0.50 |
| Mt Baker Ski Area | 0 - 1.00 | 1.00 - 1.50 |
| Washington Pass | 0.50 - 0.75 | 0.50 - 0.75 |
| Stevens Pass | 1.00 - 1.50 | 0 - 1.00 |
| Snoqualmie Pass | 1.50 - 2.00 | 1.00 - 1.50 |
| Mission Ridge | 0.25 - 0.50 | LT 0.25 |
| Crystal Mt | 1.00 - 1.50 | 0 - 1.00 |
| Paradise | 0 - 2.00 | 0 - 2.00 |
| White Pass | 1.00 - 1.50 | 1.00 - 1.50 |
| Mt Hood Meadows | 1.50 - 2.00 | 0 - 1.00 |
| Timberline | 2.00 - 2.50 | 1.00 - 1.50 |
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: 2:48 PM PDT Monday, March 13, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Afternoon | S 5 - 15 | WSW 10 - 20 | SW 10 - 20 | --- - | WSW 20 - 30 |
| Monday Night | S 0 - 10 | S 0 - 10 | SE 0 - 10 | --- - | SW 15 - 25 |
| Tuesday Morning | SW 5 - 15 | SSW 5 - 15 | SW 15 - 25 | --- - | SW 30 - 40 |
| Tuesday Afternoon | SSW 15 - 25 | S 10 - 20 | SW 15 - 25 | --- - | SW 15 - 30 |
| Tuesday Night | S 15 - 25 | S 20 - 30 | SSE 10 - 20 | --- - | SW 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon | S 5 - 15 |
| Monday Night | S 0 - 10 |
| Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | SSW 15 - 25 |
| Tuesday Night | S 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | S 0 - 10 |
| Tuesday Morning | SSW 5 - 15 |
| Tuesday Afternoon | S 10 - 20 |
| Tuesday Night | S 20 - 30 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SE 0 - 10 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | SW 15 - 25 |
| Tuesday Night | SSE 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon | WSW 20 - 30 |
| Monday Night | SW 15 - 25 |
| Tuesday Morning | SW 30 - 40 |
| Tuesday Afternoon | SW 15 - 30 |
| Tuesday Night | SW 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Afternoon | S 5 - 15 |
| Monday Night | S 0 - 10 |
| Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | SSW 15 - 25 |
| Tuesday Night | S 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon | WSW 10 - 20 |
| Monday Night | S 0 - 10 |
| Tuesday Morning | SSW 5 - 15 |
| Tuesday Afternoon | S 10 - 20 |
| Tuesday Night | S 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon | SW 10 - 20 |
| Monday Night | SE 0 - 10 |
| Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon | SW 15 - 25 |
| Tuesday Night | SSE 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday Morning | --- - |
| Tuesday Afternoon | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon | WSW 20 - 30 |
| Monday Night | SW 15 - 25 |
| Tuesday Morning | SW 30 - 40 |
| Tuesday Afternoon | SW 15 - 30 |
| Tuesday Night | SW 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 | |
|---|---|---|---|---|---|
| Monday Afternoon | WSW 15 - 25 | WSW 15 - 25 | WSW 25 - 35 | --- - | WSW 45 - 55 |
| Monday Night - Tuesday Morning | SW 15 - 25 | SW 15 - 25 | SW 40 - 50 | --- - | WSW 55 - 65 |
| Tuesday Afternoon - Tuesday Night | SW 25 - 35 | WSW 35 - 45 | WSW 35 - 45 | --- - | SW 40 - 50 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon | WSW 15 - 25 |
| Monday Night - Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon - Tuesday Night | SW 25 - 35 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Afternoon | WSW 15 - 25 |
| Monday Night - Tuesday Morning | SW 15 - 25 |
| Tuesday Afternoon - Tuesday Night | WSW 35 - 45 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon | WSW 25 - 35 |
| Monday Night - Tuesday Morning | SW 40 - 50 |
| Tuesday Afternoon - Tuesday Night | WSW 35 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon - Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon | WSW 45 - 55 |
| Monday Night - Tuesday Morning | WSW 55 - 65 |
| Tuesday Afternoon - Tuesday Night | SW 40 - 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: 2:48 PM PDT Monday, March 13, 2017
Extended Weather Synopsis for Tuesday night through Tuesday
A front pushing through on Wednesday will slowly begin to kick this whole mess of never-ending moist and mild W-SW flow out of the area...but not before another wet day. Snow levels should fall ever so slightly during the day on Wednesday, but just enough for snow to accumulate in the above treeline zone. A sharper cooling trend should take place Wednesday night into Thursday morning but steady precipitation will turn to showers with only local snow accumulations along the west slopes of the Cascades.
A front will impact British Columbia on Thursday with some light rain and snow mostly for the north Cascades and Olympics and little to no precipitation for Mt. Hood.
Brace yourself, because another strong low pressure system looks to hit the Pacific Northwest Friday and Friday night.
Extended Weather
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
Moderate rain and snow, heaviest west slopes of the Cascades and Mt. Hood. Slow cooling trend.
Moderate rain and snow becoming scattered light rain and snow showers in the evenng. Cooling trend.
Light rain and snow Olympics and north Cascades. Cloudy with periods of light rain and snow south Washington Cascades and Mt. Hood.
Light rain and snow developing and becoming moderate in the afternoon. Slight warming trend.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Morning | Snow Level | 5500' - 6500' | 5500' - 6500' | 6000' - 7000' | |
| Wednesday Afternoon | Snow Level | 4000' - 5000' | 5000' - 6000' | 5500' - 6500' | |
| Wednesday Night | Snow Level | 2000' - 3000' | 2000' - 3000' | 2500' - 3500' | |
| Thursday - Thursday Night | Snow Level | 2500' - 3500' | 2500' - 3500' | 3500' - 4500' | |
| Friday | Snow Level | 3500' - 4500' | 3500' - 4500' | 5500' - 6500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 5500' - 6500' |
| Wednesday Afternoon |
Snow Level 4000' - 5000' |
| Wednesday Night |
Snow Level 2000' - 3000' |
| Thursday - Thursday Night |
Snow Level 2500' - 3500' |
| Friday |
Snow Level 3500' - 4500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 5500' - 6500' |
| Wednesday Afternoon |
Snow Level 5000' - 6000' |
| Wednesday Night |
Snow Level 2000' - 3000' |
| Thursday - Thursday Night |
Snow Level 2500' - 3500' |
| Friday |
Snow Level 3500' - 4500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 6000' - 7000' |
| Wednesday Afternoon |
Snow Level 5500' - 6500' |
| Wednesday Night |
Snow Level 2500' - 3500' |
| Thursday - Thursday Night |
Snow Level 3500' - 4500' |
| Friday |
Snow Level 5500' - 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.
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 13, 2017
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