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
The dominant eastern Pacific upper level ridge responsible for our dry winter thus far looks to be flattened through the end of the week...allowing the door open to systems arriving in westerly flow.
Upper level ridging over the west coast this morning has shifted east as a cluster of weak systems offshore has spread increasing mid and high level clouds today. Moderate easterly flow through the passes and Columbia river gap will keep these affected areas colder than the warm free-air freezing levels seen elsewhere.
Light precipitation should spread inland by early Tuesday morning. A weak closed upper low is forecast to move through Oregon/Washington border Tuesday. The heaviest precipitation looks to be from Mt. Hood through Mt. Rainier Tuesday afternoon and evening. Easterly flow through the passes and moderate freezing levels may allow for mixed precipitation types at Snoqualmie. A stronger system should start to spread light rain and snow into the Olympics late Tuesday night.
Weather Forecast
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday - Monday Evening |
Increasing mid and high clouds from the southwest today. Mild except locally cooler Cascade Passes and valleys. |
| Monday Night |
Light rain and snow developing, likely after midnight. Light mixed precipitation possible at Snoqualmie Pass late. |
| Tuesday |
Light rain and snow, except occasionally moderate Snoqualmie Pass and south. Mixed precipitation possible at Snoqualmie Pass. |
| Tuesday Night |
Light rain and snow showers. |
East slopes of the Washington Cascades
| Monday - Monday Evening |
Increasing mid and high clouds from the southwest today. Mild except locally cooler near the Cascade Passes and valleys. |
| Monday Night |
Light rain and snow developing late. |
| Tuesday |
Light rain and snow. |
| Tuesday Night |
Light rain and snow showers tapering off with partial clearing overnight. |
Mt. Hood Area
| Monday - Monday Evening |
Increasing mid and high clouds from the southwest today. Mild except lower mountain exposed to east winds. |
| Monday Night |
Light rain and snow developing, likely after midnight. |
| Tuesday |
Light rain and snow becoming moderate Tuesday afternoon. |
| Tuesday Night |
Light rain and snow showers tapering off Tuesday night. |
Issued: 1:49 PM PST Monday, January 6, 2014
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday | Freezing Level * | 10000' | ' | ' | ' | ' | 10000' | ' | 10500' |
| Monday Evening | Freezing Level * | 8000' | ' | ' | ' | ' | 7000' | ' | 8000' |
| Monday Night - Tuesday Morning | Snow Level * | 5500' | ' | ' | ' | ' | 4000' | ' | 5000' |
| Tuesday Afternoon | Snow Level * | 5500' | ' | ' | ' | ' | 4500' | ' | 5000' |
| Tuesday Night | Snow Level | 5000' | ' | ' | ' | ' | 4000' | ' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday |
Freezing Level 10000' (Easterly Flow *) |
| Monday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Monday Night - Tuesday Morning |
Snow Level 5500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 5000' |
| Mt. Baker | Elevation |
|---|---|
| Monday |
Freezing Level ' (Easterly Flow *) |
| Monday Evening |
Freezing Level ' (Easterly Flow *) |
| Monday Night - Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' |
| Washington Pass | Elevation |
|---|---|
| Monday |
Freezing Level ' (Easterly Flow *) |
| Monday Evening |
Freezing Level ' (Easterly Flow *) |
| Monday Night - Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' |
| Leavenworth | Elevation |
|---|---|
| Monday |
Freezing Level ' (Easterly Flow *) |
| Monday Evening |
Freezing Level ' (Easterly Flow *) |
| Monday Night - Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Monday |
Freezing Level ' (Easterly Flow *) |
| Monday Evening |
Freezing Level ' (Easterly Flow *) |
| Monday Night - Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday |
Freezing Level 10000' (Easterly Flow *) |
| Monday Evening |
Freezing Level 7000' (Easterly Flow *) |
| Monday Night - Tuesday Morning |
Snow Level 4000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 4500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday |
Freezing Level ' (Easterly Flow *) |
| Monday Evening |
Freezing Level ' (Easterly Flow *) |
| Monday Night - Tuesday Morning |
Snow Level ' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level ' (Easterly Flow *) |
| Tuesday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Monday |
Freezing Level 10500' (Easterly Flow *) |
| Monday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Monday Night - Tuesday Morning |
Snow Level 5000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Tuesday Night |
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
| Tuesday | Tuesday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.25 |
| Mt Baker Ski Area | LT 0.10 | 0 - 0.50 |
| Washington Pass | LT 0.10 | LT 0.25 |
| Stevens Pass | LT 0.10 | 0.25 - 0.50 |
| Snoqualmie Pass | LT 0.10 | 0 - 0.50 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.25 |
| Paradise | LT 0.10 | 0 - 0.75 |
| White Pass | LT 0.10 | 0 - 0.50 |
| Mt Hood Meadows | LT 0.10 | 0 - 0.50 |
| Timberline | LT 0.10 | 0.50 - 0.75 |
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: 1:49 PM PST Monday, January 6, 2014
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Afternoon - Monday Night | SW 10 - 20 | --- - | SW 10 - 20 | --- - | SW 10 - 20 |
| Tuesday | SW 5 - 15 | --- - | SW 5 - 15 | --- - | WSW 10 - 20 |
| Tuesday Night | SW 15 - 30 | --- - | WSW 15 - 25 | --- - | WSW 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Afternoon - Monday Night | SW 10 - 20 |
| Tuesday | SW 5 - 15 |
| Tuesday Night | SW 15 - 30 |
| Mt. Baker | Elevation |
|---|---|
| Monday Afternoon - Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Afternoon - Monday Night | SW 10 - 20 |
| Tuesday | SW 5 - 15 |
| Tuesday Night | WSW 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Afternoon - Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Afternoon - Monday Night | SW 10 - 20 |
| Tuesday | WSW 10 - 20 |
| Tuesday Night | WSW 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | SW 10 - 20 |
| Tuesday | SW 5 - 15 |
| Tuesday Night | SW 15 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | SW 10 - 20 |
| Tuesday | SW 5 - 15 |
| Tuesday Night | WSW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Afternoon - Monday Night | SW 10 - 20 |
| Tuesday | WSW 10 - 20 |
| Tuesday Night | WSW 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 | --- - | --- - | SW 15 - 25 | --- - | SW 15 - 25 |
| Monday Night | --- - | --- - | WNW 15 - 25 | --- - | WNW 15 - 25 |
| Tuesday | --- - | --- - | W 10 - 20 | --- - | WNW 20 - 30 |
| Tuesday Night | --- - | --- - | SW 15 - 25 | --- - | W 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Washington Pass | Direction - Speed |
|---|---|
| Monday | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday | SW 15 - 25 |
| Monday Night | WNW 15 - 25 |
| Tuesday | W 10 - 20 |
| Tuesday Night | SW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday | SW 15 - 25 |
| Monday Night | WNW 15 - 25 |
| Tuesday | WNW 20 - 30 |
| Tuesday Night | W 20 - 30 |
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: 1:49 PM PST Monday, January 6, 2014
Extended Weather Synopsis for Tuesday night through Tuesday
The frontal system on Wednesday should bring a period of moderate to heavy precipitation in southwest flow and slightly cooler snow levels with increasing winds Wednesday afternoon and Wednesday night. Showers should taper down Wednesday night but yet another fast moving system should slide over the Pacific Northwest on Thursday and then turn to showers Thursday night. The upper level ridge will begin to rebound offshore on Friday, pushing the next fast moving frontal system into British Columbia, with light rain and snow affecting mainly the central Cascades and northward. This system should be accompanied by a warming trend.
Extended Weather
Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes and Mt. Hood Area
Moderate rain and snow increasing and becoming occasionally heavy west slopes of the Cascades and Mt. Hood Wednesday afternoon. Becoming windy Wednesday afternoon.
Moderate rain and snow showers overnight, except occasionally heavy north Cascades.
Light rain and snow Thursday morning increasing and becoming moderate in the afternoon.
Light to moderate rain and snow showers tapering down overnight.
Light rain and snow developing Friday morning central Cascades and north...cloudy Mt. Hood area. Warming trend.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday | Snow Level | ' - ' | 3500' - 4500' | 4000' - 5000' | * |
| Wednesday Night - Thursday Morning | Snow Level | ' - ' | 2500' - 3500' | 3500' - 4500' | |
| Thursday Afternoon - Thursday Night | Snow Level | ' - ' | 2500' - 3500' | 4000' - 5000' | |
| Friday | Snow Level | ' - ' | 3000' - 4000' | 4500' - 5500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday |
Snow Level ' - ' (Easterly Flow *) |
| Wednesday Night - Thursday Morning |
Snow Level ' - ' |
| Thursday Afternoon - Thursday Night |
Snow Level ' - ' |
| Friday |
Snow Level ' - ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday |
Snow Level 3500' - 4500' (Easterly Flow *) |
| Wednesday Night - Thursday Morning |
Snow Level 2500' - 3500' |
| Thursday Afternoon - Thursday Night |
Snow Level 2500' - 3500' |
| Friday |
Snow Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday |
Snow Level 4000' - 5000' (Easterly Flow *) |
| Wednesday Night - Thursday Morning |
Snow Level 3500' - 4500' |
| Thursday Afternoon - Thursday Night |
Snow Level 4000' - 5000' |
| Friday |
Snow Level 4500' - 5500' |
* 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 6, 2014
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