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 & Friday
The upper level ridge stationed in the eastern Pacific most of this month and currently centered along the western US coast will temporarily flatten as a weak frontal system approaches from the northwest. The Pacific Northwest is in the warm sector and mountain temperatures are mild this morning. Light dribs and drabs of rain and snow should mainly affect the Olympics and north Cascades today. The frontal boundary will sag south overnight, spreading more widespread precipitation to the central and southern Washington Cascades through Tuesday morning while Mt. Hood will likely see little to no precipitation as the front wanes over Washington. Forecast models early this morning indicate less precipitation with this system for late tonight into Tuesday morning.
A drying trend should ensue Tuesday afternoon through Tuesday night. Partial clearing should begin for the central/south Washington Cascades and Mt. Hood area beginning Tuesday afternoon. Snow and freezing levels will remain on the relatively mild side through the short term.
Weather Forecast
Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
| Monday |
Cloudy with periods of light rain and snow, mainly Olympics and north Cascades. |
| Monday Night - Tuesday Morning |
Light rain and snow spreading south overnight. |
| Tuesday Afternoon |
Cloudy with light rain and snow ending, partial clearing south Washington Cascades in the afternoon. |
| Tuesday Night |
Partly cloudy. |
East slopes of the Washington Cascades
| Monday |
Mostly cloudy with periods of light rain and snow, mainly northeast Cascades. |
| Monday Night - Tuesday Morning |
Light rain and snow spreading south overnight. |
| Tuesday Afternoon |
Becoming partly cloudy. |
| Tuesday Night |
Partly cloudy. |
Mt. Hood Area
| Monday - Monday Evening |
Mostly Cloudy. |
| Monday Night - Tuesday Morning |
Periods of light rain and snow. |
| Tuesday Afternoon |
Cloudy with light rain and snow ending, partial clearing late afternoon. |
| Tuesday Night |
Partly cloudy. |
Issued: 7:21 AM PST Monday, December 30, 2013
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 | 5500' | ' | ' | ' | ' | 5500' | ' | 6500' |
| Monday Evening | Snow Level | 5500' | ' | ' | ' | ' | 4500' | ' | 6000' |
| Monday Night - Tuesday Morning | Snow Level | 5000' | ' | ' | ' | ' | 3500' | ' | 5000' |
| Tuesday Afternoon | Snow Level | 4500' | ' | ' | ' | ' | 3500' | ' | 5500' |
| Tuesday Night | Freezing Level | 6500' | ' | ' | ' | ' | 4000' | ' | 7500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday |
Snow Level 5500' |
| Monday Evening |
Snow Level 5500' |
| Monday Night - Tuesday Morning |
Snow Level 5000' |
| Tuesday Afternoon |
Snow Level 4500' |
| Tuesday Night |
Freezing Level 6500' |
| Mt. Baker | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Evening |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Freezing Level ' |
| Washington Pass | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Evening |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Freezing Level ' |
| Leavenworth | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Evening |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Freezing Level ' |
| Stevens Pass | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Evening |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Freezing Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday |
Snow Level 5500' |
| Monday Evening |
Snow Level 4500' |
| Monday Night - Tuesday Morning |
Snow Level 3500' |
| Tuesday Afternoon |
Snow Level 3500' |
| Tuesday Night |
Freezing Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday |
Snow Level ' |
| Monday Evening |
Snow Level ' |
| Monday Night - Tuesday Morning |
Snow Level ' |
| Tuesday Afternoon |
Snow Level ' |
| Tuesday Night |
Freezing Level ' |
| Mt. Hood | Elevation |
|---|---|
| Monday |
Snow Level 6500' |
| Monday Evening |
Snow Level 6000' |
| Monday Night - Tuesday Morning |
Snow Level 5000' |
| Tuesday Afternoon |
Snow Level 5500' |
| Tuesday Night |
Freezing Level 7500' |
* 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
| Friday | Friday | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | LT 0.10 |
| Mt Baker Ski Area | 0.25 - 0.50 | LT 0.25 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.25 | 0.25 - 0.50 |
| Snoqualmie Pass | LT 0.10 | 0.25 - 0.50 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | 0.25 - 0.50 |
| White Pass | LT 0.10 | LT 0.25 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | 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: 7:21 AM PST Monday, December 30, 2013
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Morning | W 5 - 15 | --- - | W 0 - 10 | --- - | W 0 - 10 |
| Monday Afternoon | SW 10 - 20 | --- - | WSW 5 - 15 | --- - | W 5 - 15 |
| Monday Night - Tuesday Morning | W 10 - 20 | --- - | W 10 - 20 | --- - | WSW 10 - 20 |
| Tuesday Afternoon - Tuesday Night | WNW 0 - 10 | --- - | WNW 0 - 10 | --- - | WNW 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | SW 10 - 20 |
| Monday Night - Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon - Tuesday Night | WNW 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon - Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night - Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon - Tuesday Night | WNW 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon - Tuesday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Monday Night - Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon - Tuesday Night | WNW 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Morning | W 5 - 15 |
| Monday Afternoon | SW 10 - 20 |
| Monday Night - Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon - Tuesday Night | WNW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon - Tuesday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | WSW 5 - 15 |
| Monday Night - Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon - Tuesday Night | WNW 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night - Tuesday Morning | --- - |
| Tuesday Afternoon - Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | W 0 - 10 |
| Monday Afternoon | W 5 - 15 |
| Monday Night - Tuesday Morning | WSW 10 - 20 |
| Tuesday Afternoon - Tuesday Night | WNW 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 | --- - | --- - | W 20 - 30 | --- - | W 20 - 30 |
| Monday Afternoon | --- - | --- - | W 30 - 40 | --- - | W 25 - 35 |
| Monday Night | --- - | --- - | W 35 - 50 | --- - | WNW 30 - 40 |
| Tuesday | --- - | --- - | NW 25 - 35 | --- - | NW 30 - 40 |
| Tuesday Night | --- - | --- - | NW 20 - 30 | --- - | NW 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 | W 20 - 30 |
| Monday Afternoon | W 30 - 40 |
| Monday Night | W 35 - 50 |
| Tuesday | NW 25 - 35 |
| Tuesday Night | NW 20 - 30 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Morning | --- - |
| Monday Afternoon | --- - |
| Monday Night | --- - |
| Tuesday | --- - |
| Tuesday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Morning | W 20 - 30 |
| Monday Afternoon | W 25 - 35 |
| Monday Night | WNW 30 - 40 |
| Tuesday | NW 30 - 40 |
| Tuesday Night | NW 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: 7:21 AM PST Monday, December 30, 2013
Extended Weather Synopsis for Friday night through Friday
Wednesday should be dry but with a fair amount of mid and high clouds for the Olympics and north Cascades with partly cloudy conditions further south. The upper level ridge that rebuilt offshore Tuesday night should shift inland on Wednesday as a weak frontal system pushes into central British Columbia. A stronger shortwave rounding the base of the trough in northeast Pacific should energize this frontal system, and drive the system into the PNW Thursday afternoon through Thursday night. This looks to be a stronger system than we have seen in awhile, with moderate to even heavy precipitation for the west slopes and a sharp cooling trend Thursday night. However, this system should pass through rather quickly, and cool and drier conditions should prevail by Friday afternoon.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Wednesday - Wednesday NightMostly cloudy Olympics and north Cascades. Partly cloudy central and south.
Thursday MorningLight rain and snow developing Olympics and north Cascades.
Thursday Afternoon - Thursday EveningLight rain and snow spreading south and east. Precipitation becoming moderate to occasionally heavy west slopes Thursday evening.
Thursday Night - Friday MorningLight to moderate rain and snow showers, heaviest west slopes. Sharp cooling trend.
Friday AfternoonMostly cloudy. Scattered showers for the west slopes.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday - Wednesday Night | Freezing Level | ' - ' | 6000' - 7000' | 8000' - 9000' | |
| Thursday | Snow Level | ' - ' | 5000' - 6000' | 6500' - 7500' | * |
| Thursday Night | Snow Level | ' - ' | 2500' - 3500' | 4500' - 5500' | |
| Friday | Snow Level | ' - ' | 1500' - 2500' | 2000' - 3000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Freezing Level ' - ' |
| Thursday |
Snow Level ' - ' (Easterly Flow *) |
| Thursday Night |
Snow Level ' - ' |
| Friday |
Snow Level ' - ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Freezing Level 6000' - 7000' |
| Thursday |
Snow Level 5000' - 6000' (Easterly Flow *) |
| Thursday Night |
Snow Level 2500' - 3500' |
| Friday |
Snow Level 1500' - 2500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday - Wednesday Night |
Freezing Level 8000' - 9000' |
| Thursday |
Snow Level 6500' - 7500' (Easterly Flow *) |
| Thursday Night |
Snow Level 4500' - 5500' |
| Friday |
Snow Level 2000' - 3000' |
* 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 Dec 29, 2013
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