Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Friday & Thursday
The vertically stacked low pressure system has dug south along the Washington coast and is located just west of Astoria this afternoon. Steady light rain and snow for the south Washington Cascades has come to and end, but additional light accumulations are expected this afternoon and evening. As the low opens and shifts over Oregon later this afternoon... a marginally unstable air mass with allow showers to form over the mountains over the east slopes and drift west of the crest. Upslope showers should continue for the north slopes of the Olympics and south and central east slopes of the Cascades. Mt. Hood has been in westerly flow and light showers most of the day. As winds back to NE... there is still the potential for moderate accumulations in the evening.
Overall, a drying trend from north to south should begin late Friday afternoon and continue overnight as colder and drier air moves into the region. Moderate to locally strong easterly winds will develop overnight Friday. Winds should decrease Saturday afternoon... except for Mt. Hood where they should locally be strong through the day. Freezing levels should remain on the cool side Saturday.
Weather Forecast
North and central Washington Cascades near and west of the crest including Stevens and Snoqualmie Passes
| Friday Afternoon |
Cloudy with scattered light rain and snow showers, partial clearing trend north Cascades. |
| Friday Night - Saturday Morning |
Isolated showers ending early in the evening. Becoming mostly clear overnight. Moderate easterly winds. Colder. |
| Saturday Afternoon - Saturday Night |
Mostly clear. |
South Washington Cascades near and west of the crest including White Pass and Olympics
| Friday Afternoon |
Cloudy with scattered light to occasionally moderate rain and snow showers. |
| Friday Night - Saturday Morning |
Mostly cloudy with isolated showers in the evening, then mostly clear. Moderate easterly winds. Colder. |
| Saturday Afternoon - Saturday Night |
Mostly clear. |
East slopes of the Washington Cascades
| Friday Afternoon |
Cloudy with scattered light rain and snow showers except occasionally moderate central and southeast Cascades. |
| Friday Night - Saturday Morning |
Mostly cloudy with isolated showers in the evening, then mostly clear. Moderate easterly winds. Colder. |
| Saturday Afternoon - Saturday Night |
Mostly clear. |
Mt. Hood Area
| Friday - Friday Evening |
Mostly cloudy with light to occasionally moderate rain and snow showers. |
| Friday Night |
Partial clearing Friday night. Moderate to strong easterly winds. Colder. |
| Saturday Night |
Mostly clear. |
Issued: 2:30 PM PST Friday, February 27, 2015
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Afternoon | Snow Level * | 4000' | 3500' | 3000' | ' | ' | 3500' | ' | 4000' |
| Friday Night - Saturday Morning | Freezing Level * | 1500' | 1000' | 1000' | ' | ' | 2000' | ' | 1500' |
| Saturday Afternoon | Freezing Level * | 5000' | 4000' | 3500' | ' | ' | 4500' | ' | 4000' |
| Saturday Night | Freezing Level * | 4000' | 2500' | 2000' | ' | ' | 2500' | ' | 2500' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Freezing Level 1500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 5000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Friday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Freezing Level 1000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 4000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 2500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Friday Afternoon |
Snow Level 3000' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Freezing Level 1000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 3500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 2000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Friday Afternoon |
Snow Level ' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Freezing Level ' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Saturday Night |
Freezing Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Friday Afternoon |
Snow Level ' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Freezing Level ' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Saturday Night |
Freezing Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Afternoon |
Snow Level 3500' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Freezing Level 2000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 4500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 2500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Afternoon |
Snow Level ' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Freezing Level ' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Saturday Night |
Freezing Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Friday Afternoon |
Snow Level 4000' (Easterly Flow *) |
| Friday Night - Saturday Morning |
Freezing Level 1500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 4000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 2500' (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
| Thursday | Thursday | |
|---|---|---|
| Hurricane Ridge | 0 - 0.50 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.25 | LT 0.10 |
| Snoqualmie Pass | 0 - 0.50 | LT 0.10 |
| Mission Ridge | 0 - 0.50 | LT 0.10 |
| Crystal Mt | 0 - 0.50 | LT 0.10 |
| Paradise | 0.50 - 0.75 | LT 0.10 |
| White Pass | 0 - 0.50 | LT 0.10 |
| Mt Hood Meadows | 0.50 - 0.75 | LT 0.10 |
| Timberline | 0 - 0.75 | 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: 2:30 PM PST Friday, February 27, 2015
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Afternoon | NE 10 - 20 | NE 10 - 20 | E 15 - 25 | --- - | E 5 - 15 |
| Friday Night - Saturday Morning | NE 10 - 20 | NE 15 - 25 | E 15 - 30 | --- - | E 25 - 40 |
| Saturday Afternoon | NE 10 - 20 | NE 5 - 15 | ENE 5 - 15 | --- - | ENE 15 - 25 |
| Saturday Night | NE 0 - 10 | E 0 - 10 | E 0 - 10 | --- - | E 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Afternoon | NE 10 - 20 |
| Friday Night - Saturday Morning | NE 10 - 20 |
| Saturday Afternoon | NE 10 - 20 |
| Saturday Night | NE 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Friday Afternoon | NE 10 - 20 |
| Friday Night - Saturday Morning | NE 15 - 25 |
| Saturday Afternoon | NE 5 - 15 |
| Saturday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Afternoon | E 15 - 25 |
| Friday Night - Saturday Morning | E 15 - 30 |
| Saturday Afternoon | ENE 5 - 15 |
| Saturday Night | E 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Friday Afternoon | E 5 - 15 |
| Friday Night - Saturday Morning | E 25 - 40 |
| Saturday Afternoon | ENE 15 - 25 |
| Saturday Night | E 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Afternoon | NE 10 - 20 |
| Friday Night - Saturday Morning | NE 10 - 20 |
| Saturday Afternoon | NE 10 - 20 |
| Saturday Night | NE 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Afternoon | NE 10 - 20 |
| Friday Night - Saturday Morning | NE 15 - 25 |
| Saturday Afternoon | NE 5 - 15 |
| Saturday Night | E 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Afternoon | E 15 - 25 |
| Friday Night - Saturday Morning | E 15 - 30 |
| Saturday Afternoon | ENE 5 - 15 |
| Saturday Night | E 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Afternoon | E 5 - 15 |
| Friday Night - Saturday Morning | E 25 - 40 |
| Saturday Afternoon | ENE 15 - 25 |
| Saturday Night | E 10 - 20 |
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 | |
|---|---|---|---|---|---|
| Friday Afternoon | E 10 - 20 | NE 10 - 20 | ESE 15 - 25 | --- - | VAR 0 - 10 |
| Friday Night - Saturday Morning | NE 20 - 30 | NE 15 - 25 | NE 20 - 30 | --- - | NE 15 - 25 |
| Saturday Afternoon | NE 15 - 25 | NE 15 - 25 | NNE 15 - 25 | --- - | NE 30 - 40 |
| Saturday Night | N 10 - 20 | N 10 - 20 | N 10 - 20 | --- - | NE 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Afternoon | E 10 - 20 |
| Friday Night - Saturday Morning | NE 20 - 30 |
| Saturday Afternoon | NE 15 - 25 |
| Saturday Night | N 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Afternoon | NE 10 - 20 |
| Friday Night - Saturday Morning | NE 15 - 25 |
| Saturday Afternoon | NE 15 - 25 |
| Saturday Night | N 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Afternoon | ESE 15 - 25 |
| Friday Night - Saturday Morning | NE 20 - 30 |
| Saturday Afternoon | NNE 15 - 25 |
| Saturday Night | N 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Afternoon | VAR 0 - 10 |
| Friday Night - Saturday Morning | NE 15 - 25 |
| Saturday Afternoon | NE 30 - 40 |
| Saturday Night | NE 10 - 20 |
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: 2:30 PM PST Friday, February 27, 2015
Extended Weather Synopsis for Thursday night through Thursday
Sunday should be a fair weather day, beginning mostly sunny before increasing high clouds start to advance from the NW for the Olympics and north and central Cascades. A weak upper level trough is forecast to move over the area Sunday night and Monday... but produce only an increase in clouds and a few showers.
A high amplitiude ridge located offshore will shift closer on Tuesday, but strong surface high pressure over the northern Rockies will help drive a shot of cold air toward the PNW... with freezing levels struggling to recover despite sunny skies during the day.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Mostly sunny, with increasing high clouds central and north Cascades and Olympics in the afternoon.
Mostly cloudy with a chance of rain and snow showers.
Mostly clear and cold.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday | Freezing Level | 4000' - 5000' | 4500' - 5500' | 5000' - 6000' | |
| Sunday Night - Monday | Snow Level | 2000' - 3000' | 2000' - 3000' | 2500' - 3500' | |
| Monday Night - Tuesday | Freezing Level | 1000' - 2000' | 1500' - 2500' | 1500' - 2500' |
| Mt. Baker | Elevation |
|---|---|
| Sunday |
Freezing Level 4000' - 5000' |
| Sunday Night - Monday |
Snow Level 2000' - 3000' |
| Monday Night - Tuesday |
Freezing Level 1000' - 2000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday |
Freezing Level 4500' - 5500' |
| Sunday Night - Monday |
Snow Level 2000' - 3000' |
| Monday Night - Tuesday |
Freezing Level 1500' - 2500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday |
Freezing Level 5000' - 6000' |
| Sunday Night - Monday |
Snow Level 2500' - 3500' |
| Monday Night - Tuesday |
Freezing Level 1500' - 2500' |
* 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 Feb 27, 2015
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