Issued: 7:12 AM PST Saturday, February 1, 2014
by Dennis D'Amico

Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather

Weather Synopsis for Saturday & Friday

The Pacific Northwest is in weak northerly flow aloft and a split pattern over the west coast should make for a quiet weather weekend. Just enough instability will be around today for mountain showers through this evening.  Clearing should take place overnight as light snow shower coverage diminishes.   

A upper level shortwave in northwest flow should reach the Olympic peninsula and the north Cascades by Sunday afternoon.  A general increase in mountain clouds and light snow showers is expected for the Olympics and Washington Cascades in the afternoon and Mt. Hood in the evening.  Light snow showers should continue overnight. 

Climate note:  January 2014 freezing levels averaged even warmer than December 2013...with Forks (Washington Coast), Salem (Oregon) and Spokane (eastern WA) averaging roughly 7900, 8500, and 5500 feet respectively. 

Weather Forecast

Olympics, Washington Cascades near and west of the crest including Stevens, Snoqualmie, and White Passes
Saturday Morning - Saturday Evening

Partly to mostly cloudy with scattered light snow showers. 

Saturday Night - Sunday Morning

Partly to mostly clear. 

Mt. Hood Area
Saturday Morning - Saturday Evening

Partly to mostly cloudy with scattered light snow showers. 

Saturday Night - Sunday Afternoon

Mostly clear becoming partly cloudy a few snow showers in the afternoon. 

East slopes of the Washington Cascades
Saturday Morning - Saturday Evening

Partly cloudy with isolated light snow showers mainly near the crest. 

Saturday Night - Sunday Morning

Mostly clear except for mostly cloudy lower slopes. 

Snow/Freezing Level (ft)

Hurricane Ridge Mt. Baker Washington Pass Leavenworth Stevens Pass Snoqualmie Pass Mt. Rainier, Crystal & White Pass Mt. Hood
Saturday Morning Snow Level 1500' ' ' ' ' 1500' ' 2000'
Saturday Afternoon Snow Level 2000' ' ' ' ' 2000' ' 3000'
Saturday Night - Sunday Morning Snow Level * 1500' ' ' ' ' 1000' ' 2000'
Sunday Afternoon Snow Level 1500' ' ' ' ' 1500' ' 2500'
Hurricane Ridge Elevation
Saturday Morning Snow Level
1500'
Saturday Afternoon Snow Level
2000'
Saturday Night - Sunday Morning Snow Level
1500'
(Easterly Flow *)
Sunday Afternoon Snow Level
1500'
Sunday Night Snow Level
500'
(Easterly Flow *)
Mt. Baker Elevation
Saturday Morning Snow Level
'
Saturday Afternoon Snow Level
'
Saturday Night - Sunday Morning Snow Level
'
(Easterly Flow *)
Sunday Afternoon Snow Level
'
Sunday Night Snow Level
'
(Easterly Flow *)
Washington Pass Elevation
Saturday Morning Snow Level
'
Saturday Afternoon Snow Level
'
Saturday Night - Sunday Morning Snow Level
'
(Easterly Flow *)
Sunday Afternoon Snow Level
'
Sunday Night Snow Level
'
(Easterly Flow *)
Leavenworth Elevation
Saturday Morning Snow Level
'
Saturday Afternoon Snow Level
'
Saturday Night - Sunday Morning Snow Level
'
(Easterly Flow *)
Sunday Afternoon Snow Level
'
Sunday Night Snow Level
'
(Easterly Flow *)
Stevens Pass Elevation
Saturday Morning Snow Level
'
Saturday Afternoon Snow Level
'
Saturday Night - Sunday Morning Snow Level
'
(Easterly Flow *)
Sunday Afternoon Snow Level
'
Sunday Night Snow Level
'
(Easterly Flow *)
Snoqualmie Pass Elevation
Saturday Morning Snow Level
1500'
Saturday Afternoon Snow Level
2000'
Saturday Night - Sunday Morning Snow Level
1000'
(Easterly Flow *)
Sunday Afternoon Snow Level
1500'
Sunday Night Snow Level
500'
(Easterly Flow *)
Mt. Rainier & Crystal Elevation
Saturday Morning Snow Level
'
Saturday Afternoon Snow Level
'
Saturday Night - Sunday Morning Snow Level
'
(Easterly Flow *)
Sunday Afternoon Snow Level
'
Sunday Night Snow Level
'
(Easterly Flow *)
Mt. Hood Elevation
Saturday Morning Snow Level
2000'
Saturday Afternoon Snow Level
3000'
Saturday Night - Sunday Morning Snow Level
2000'
(Easterly Flow *)
Sunday Afternoon Snow Level
2500'
Sunday Night Snow Level
1000'
(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

Friday Friday
Hurricane Ridge LT 0.10 LT 0.10
Mt Baker Ski Area LT 0.10 LT 0.10
Washington Pass LT 0.10 LT 0.10
Stevens Pass LT 0.10 LT 0.10
Snoqualmie Pass LT 0.10 LT 0.10
Mission Ridge LT 0.10 LT 0.10
Crystal Mt LT 0.10 LT 0.10
Paradise LT 0.10 LT 0.10
White Pass LT 0.10 LT 0.10
Mt Hood Meadows LT 0.10 LT 0.10
LT 0.10 LT 0.10

Free Winds at 5000' (mph)

Hurricane Ridge Mt. Baker Stevens to Snoqualmie Pass Mt. Rainier Mt. Hood
Saturday Morning W 0 - 10 --- - W 5 - 15 --- - W 5 - 15
Saturday Afternoon SW 5 - 15 --- - SW 0 - 10 --- - SW 5 - 15
Saturday Night - Sunday Morning VAR 0 - 10 --- - VAR 0 - 10 --- - VAR 0 - 10
Sunday Afternoon N 0 - 10 --- - NW 5 - 15 --- - NW 5 - 15
Hurricane Ridge Elevation
Saturday Morning W 0 - 10
Saturday Afternoon SW 5 - 15
Saturday Night - Sunday Morning VAR 0 - 10
Sunday Afternoon N 0 - 10
Sunday Night NNE 10 - 20
Mt. Baker Elevation
Saturday Morning --- -
Saturday Afternoon --- -
Saturday Night - Sunday Morning --- -
Sunday Afternoon --- -
Sunday Night --- -
Stevens and Snoqualmie Pass Elevation
Saturday Morning W 5 - 15
Saturday Afternoon SW 0 - 10
Saturday Night - Sunday Morning VAR 0 - 10
Sunday Afternoon NW 5 - 15
Sunday Night SE 5 - 15
Mt. Rainier Elevation
Saturday Morning --- -
Saturday Afternoon --- -
Saturday Night - Sunday Morning --- -
Sunday Afternoon --- -
Sunday Night --- -
Mt. Hood Elevation
Saturday Morning W 5 - 15
Saturday Afternoon SW 5 - 15
Saturday Night - Sunday Morning VAR 0 - 10
Sunday Afternoon NW 5 - 15
Sunday Night NW 0 - 10
Hurricane Ridge Direction - Speed
Saturday Morning W 0 - 10
Saturday Afternoon SW 5 - 15
Saturday Night - Sunday Morning VAR 0 - 10
Sunday Afternoon N 0 - 10
Sunday Night NNE 10 - 20
Mt. Baker Direction - Speed
Saturday Morning --- -
Saturday Afternoon --- -
Saturday Night - Sunday Morning --- -
Sunday Afternoon --- -
Sunday Night --- -
Stevens and Snoqualmie Pass Direction - Speed
Saturday Morning W 5 - 15
Saturday Afternoon SW 0 - 10
Saturday Night - Sunday Morning VAR 0 - 10
Sunday Afternoon NW 5 - 15
Sunday Night SE 5 - 15
Mt. Rainier Direction - Speed
Saturday Morning --- -
Saturday Afternoon --- -
Saturday Night - Sunday Morning --- -
Sunday Afternoon --- -
Sunday Night --- -
Mt. Hood Direction - Speed
Saturday Morning W 5 - 15
Saturday Afternoon SW 5 - 15
Saturday Night - Sunday Morning VAR 0 - 10
Sunday Afternoon NW 5 - 15
Sunday Night NW 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
Saturday Morning --- - --- - NW 15 - 25 --- - NW 10 - 20
Saturday Afternoon --- - --- - WNW 5 - 15 --- - WSW 5 - 15
Saturday Night --- - --- - W 5 - 15 --- - W 10 - 20
Sunday --- - --- - W 10 - 20 --- - WNW 15 - 25
Mt. Baker Direction - Speed
Saturday Morning --- -
Saturday Afternoon --- -
Saturday Night --- -
Sunday --- -
Sunday Night --- -
Washington Pass Direction - Speed
Saturday Morning --- -
Saturday Afternoon --- -
Saturday Night --- -
Sunday --- -
Sunday Night --- -
Stevens and Snoqualmie Pass Direction - Speed
Saturday Morning NW 15 - 25
Saturday Afternoon WNW 5 - 15
Saturday Night W 5 - 15
Sunday W 10 - 20
Sunday Night NW 5 - 15
Mt. Rainier Direction - Speed
Saturday Morning --- -
Saturday Afternoon --- -
Saturday Night --- -
Sunday --- -
Sunday Night --- -
Mt. Hood Direction - Speed
Saturday Morning NW 10 - 20
Saturday Afternoon WSW 5 - 15
Saturday Night W 10 - 20
Sunday WNW 15 - 25
Sunday Night NW 10 - 20

Extended Weather Synopsis for Friday night through Friday

Strong high pressure over the Yukon should extend south into British Columbia early next week and push some very cold air into the Pacific Northwest.  Snow and freezing levels will be near sea level for much of next week.  Forecast models indicate some light upslope snow showers for the east slopes of the Cascades to near the Cascade crest for Monday and Tuesday with a drying trend into Wednesday.  Northerly surface gradients should become more easterly on Monday...with easterly flow increasing through the Cascade passes first and then potentially extending up to crest level by Tuesday morning.  Brrrrr. 

Extended Weather

Olympics, Washington Cascades and Mt. Hood
Monday - Tuesday

Mostly clear except partly to mostly cloudy with light snow showers mainly near and east of the crest.  Easterly pass winds increasing Monday through Tuesday.  Becoming colder. 

Tuesday Night - Wednesday

Mostly clear with breezy easterly pass winds.  Cold. 

Extended Snow/Freezing Levels

Mt. Baker Snoqualmie Pass Mt. Hood Easterly Flow *
Monday - Tuesday Snow Level ' - ' 0' - 1000' 0' - 1000' *
Mt. Baker Elevation
Monday - Tuesday Snow Level
' - '
(Easterly Flow *)
Tuesday Night - Wednesday Freezing Level
' - '
(Easterly Flow *)
Snoqualmie Pass Elevation
Monday - Tuesday Snow Level
0' - 1000'
(Easterly Flow *)
Tuesday Night - Wednesday Freezing Level
0' - 500'
(Easterly Flow *)
Mt. Hood Elevation
Monday - Tuesday Snow Level
0' - 1000'
(Easterly Flow *)
Tuesday Night - Wednesday Freezing Level
0' - 500'
(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.

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 28, 2014

The NWAC program is administered by the USDA-Forest Service and operates from the National Weather Service Forecast Office in Seattle. NWAC services are made possible by important collaboration and support from a wide variety of federal, state and private cooperators.