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 & Sunday
A frontal system passed through the Pacific Northwest Sunday and Sunday night bringing a cooling trend and a switch from rain to snow for many locations that experienced rain on Sunday. 24 hr snowfall totals this morning were generally in the 6-12" range along the west slopes and Mt. Hood with little snow away from the Cascade crest.
This cooling trend has come with moderate northwest winds, especially near crest level. Cool temperatures and breezy northwest winds should continue today as well as generally light snow showers. Showers should be moderate near an area of convergence between Stevens and Snoqualmie Passes through mid-day. Some sunbreaks are likely this afternoon as an upper level ridge builds offshore and shower coverage wanes this evening and overnight.
A warm frontal system should begin to approach the PNW late Monday night. Light precipitation is likely on Tuesday, but there is some disagreement on how far south into Washington the light precipitation will spread during the daylight hours on Tuesday. A gradual warming trend should take place during the day. The frontal boundary should sag south Tuesday night for a general lowering of clouds and increase in precipitation over the north/central Washington Cascades and Olympics.
Weather Forecast
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday Morning |
Light snow showers, occasionally moderate near a convergence zone around Stevens and Snoqualmie Passes. |
| Monday Afternoon |
Mostly cloudy with scattered snow showers. |
| Monday Night |
Partly cloudy with increasing high clouds overnight and light snow possible north Cascades and Olympics after midnight. |
| Tuesday |
Light to moderate rain and snow north Cascades and Olympics with periods of light rain and snow central and south Washington Cascades. Gradual warming trend. |
| Tuesday Night |
Light to occasionally moderate rain and snow. Clouds lowering. |
East slopes of the Washington Cascades
| Monday Morning |
Mostly cloudy with scattered light snow showers near the Cascade crest. |
| Monday Afternoon |
Partly cloudy with isolated snow showers. |
| Monday Night |
Partly cloudy with increasing high clouds late tonight and light snow possible northeast Cascades after midnight. |
| Tuesday |
Light rain and snow northeast Cascades with periods of light rain and snow central and south Washington Cascades. Gradual warming trend. |
| Tuesday Night |
Light rain and snow. Clouds lowering. |
Mt. Hood Area
| Monday Morning |
Light snow showers and windy. |
| Monday Afternoon |
Partly to mostly cloudy with scattered snow showers and continued windy conditions. |
| Monday Night |
Partly cloudy with increasing high clouds late Monday night. |
| Tuesday - Tuesday Evening |
Mostly cloudy with a gradual warming trend. |
| Tuesday Night |
Light rain and snow. Clouds lowering. |
Issued: 7:12 AM PDT Monday, March 17, 2014
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday | Snow Level | 2000' | ' | ' | ' | ' | 2000' | ' | 2500' |
| Monday Night - Tuesday Morning | Snow Level | 3000' | ' | ' | ' | ' | 1500' | ' | 2000' |
| Tuesday Mid-day | Snow Level | 3500' | ' | ' | ' | ' | 2500' | ' | 3500' |
| Tuesday Afternoon - Tuesday Night | Snow Level | 4000' | ' | ' | ' | ' | 3500' | ' | 4000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday |
Snow Level 2000' |
| Monday Night - Tuesday Morning |
Snow Level 3000' |
| Tuesday Mid-day |
Snow Level 3500' |
| Tuesday Afternoon - Tuesday Night |
Snow Level 4000' |
| Mt. Baker | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Mid-day |
Snow Level ' |
| Tuesday Afternoon - Tuesday Night |
Snow Level ' |
| Washington Pass | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Mid-day |
Snow Level ' |
| Tuesday Afternoon - Tuesday Night |
Snow Level ' |
| Leavenworth | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Mid-day |
Snow Level ' |
| Tuesday Afternoon - Tuesday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Mid-day |
Snow Level ' |
| Tuesday Afternoon - Tuesday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday |
Snow Level 2000' |
| Monday Night - Tuesday Morning |
Snow Level 1500' |
| Tuesday Mid-day |
Snow Level 2500' |
| Tuesday Afternoon - Tuesday Night |
Snow Level 3500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Mid-day |
Snow Level ' |
| Tuesday Afternoon - Tuesday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Monday |
Snow Level 2500' |
| Monday Night - Tuesday Morning |
Snow Level 2000' |
| Tuesday Mid-day |
Snow Level 3500' |
| Tuesday Afternoon - Tuesday Night |
Snow Level 4000' |
* 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 | Sunday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | 0.25 - 0.50 |
| Mt Baker Ski Area | LT 0.25 | 0.50 - 0.75 |
| Washington Pass | LT 0.10 | 0.25 - 0.50 |
| Stevens Pass | LT 0.25 | 0.50 - 0.75 |
| Snoqualmie Pass | LT 0.25 | 0.50 - 0.75 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.25 | LT 0.25 |
| Paradise | LT 0.25 | LT 0.25 |
| White Pass | LT 0.25 | LT 0.10 |
| Mt Hood Meadows | LT 0.25 | LT 0.10 |
| Timberline | LT 0.25 | LT 0.10 |
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: 7:12 AM PDT Monday, March 17, 2014
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | NW 15 - 25 | --- - | WNW 15 - 30 | --- - | NW 25 - 35 |
| Monday Afternoon | NW 5 - 15 | --- - | WNW 10 - 20 | --- - | NW 15 - 25 |
| Monday Night | NW 5 - 15 | --- - | NW 5 - 15 | --- - | WNW 10 - 20 |
| Tuesday - Tuesday Evening | W 0 - 10 | --- - | W 0 - 10 | --- - | W 0 - 10 |
| Tuesday Night | SW 15 - 25 | --- - | SW 10 - 20 | --- - | W 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | NW 5 - 15 |
| Monday Night | NW 5 - 15 |
| Tuesday - Tuesday Evening | W 0 - 10 |
| Tuesday Night | SW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday - Tuesday Evening | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | WNW 15 - 30 |
| Monday Afternoon | WNW 10 - 20 |
| Monday Night | NW 5 - 15 |
| Tuesday - Tuesday Evening | W 0 - 10 |
| Tuesday Night | SW 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday - Tuesday Evening | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | NW 25 - 35 |
| Monday Afternoon | NW 15 - 25 |
| Monday Night | WNW 10 - 20 |
| Tuesday - Tuesday Evening | W 0 - 10 |
| Tuesday Night | W 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | NW 15 - 25 |
| Monday Afternoon | NW 5 - 15 |
| Monday Night | NW 5 - 15 |
| Tuesday - Tuesday Evening | W 0 - 10 |
| Tuesday Night | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday - Tuesday Evening | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | WNW 15 - 30 |
| Monday Afternoon | WNW 10 - 20 |
| Monday Night | NW 5 - 15 |
| Tuesday - Tuesday Evening | W 0 - 10 |
| Tuesday Night | SW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday - Tuesday Evening | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | NW 25 - 35 |
| Monday Afternoon | NW 15 - 25 |
| Monday Night | WNW 10 - 20 |
| Tuesday - Tuesday Evening | W 0 - 10 |
| Tuesday Night | W 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 | |
|---|---|---|---|---|---|
| Monday Morning | --- - | --- - | NW 35 - 45 | --- - | NW 45 - 55 |
| Monday Afternoon | --- - | --- - | NW 30 - 40 | --- - | NW 40 - 50 |
| Monday Night | --- - | --- - | NW 25 - 35 | --- - | NW 25 - 35 |
| Tuesday | --- - | --- - | NW 20 - 30 | --- - | NW 10 - 20 |
| Tuesday Night | --- - | --- - | W 15 - 25 | --- - | W 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | NW 35 - 45 |
| Monday Afternoon | NW 30 - 40 |
| Monday Night | NW 25 - 35 |
| Tuesday | NW 20 - 30 |
| Tuesday Night | W 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | NW 45 - 55 |
| Monday Afternoon | NW 40 - 50 |
| Monday Night | NW 25 - 35 |
| Tuesday | NW 10 - 20 |
| Tuesday Night | 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.
Issued: 7:12 AM PDT Monday, March 17, 2014
Extended Weather Synopsis for Sunday night through Sunday
The front should come through the area Wednesday with a sharp cooling trend and a burst of moderate to occasionally heavy precipitation for the west slopes and Mt. Hood area. This system looks fast moving but has decent upper level support so it could deliver a healthy but quick shot of snow at lowering snow levels before transitioning to showers Wednesday afternoon. A cool upper trough combined with NW flow aloft should continue light to moderate showers at low snow levels Wednesday night and Thursday. Weak upper level ridging that builds offshore Thursday night should shift inland Friday and bring about a slow warming and drying trend.
Extended Weather
Olympics, Washington Cascades and Mt. Hood area
Moderate rain and snow, heaviest near for the west slopes, becoming moderate rain and snow showers in the afternoon. Strong cooling trend and breezy.
Light to occasionally moderate rain and snow showers, heaviest for the west slopes, cool.
Partly sunny.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Morning | Snow Level | ' - ' | 3000' - 4000' | 3500' - 4500' | |
| Wednesday Afternoon - Thursday Night | Snow Level | ' - ' | 1000' - 2000' | 2500' - 3500' | |
| Friday | Freezing Level | ' - ' | 3500' - 4500' | 4000' - 5000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Morning |
Snow Level ' - ' |
| Wednesday Afternoon - Thursday Night |
Snow Level ' - ' |
| Friday |
Freezing Level ' - ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3000' - 4000' |
| Wednesday Afternoon - Thursday Night |
Snow Level 1000' - 2000' |
| Friday |
Freezing Level 3500' - 4500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Morning |
Snow Level 3500' - 4500' |
| Wednesday Afternoon - Thursday Night |
Snow Level 2500' - 3500' |
| Friday |
Freezing Level 4000' - 5000' |
* 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 14, 2014
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