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 night through Thursday
A high-amplitude ridge is centered over Idaho on Friday afternoon. The high pressure will cut off late Friday and will expand slightly westward, increasing the already very warm temperates at mid and upper-levels Saturday night and Sunday over our region. The ridge and subsequent high will block weather systems from moving eastward, but mid and high-level clouds will remain with us at times into Saturday as a week low skirts northward offshore, brushing the Olympics with some lowering clouds and a possible sprinkle.
Moderate easterly flow will be sustained throughout the forecast period with cooler air at low levels to the east of the Cascade Crest warming as it descends to the Puget Sound lowlands.
A low-level inversion has developed as evidenced by the two stations at Washington Pass where the upper station is above freezing on Friday afternoon. In general, colder air sinks into the deeper valleys, and without wind to stir it up, low clouds and fog will predominate day and night. The easterly flow will suck the low clouds and fog through the lower mountain gaps such as Snoqualmie Pass keeping the passes cool.
More sunshine is expected by Saturday afternoon with mostly clear skies through Sunday as the inversion and moderate east flow continue.
Weather Forecast
Hurricane Ridge
| Friday Night | Partly cloudy with a mix of high and low clouds. Mild. Inversion developing. |
| Saturday | Partly cloudy and very mild. Inversion. |
Mt. Baker
| Friday Night | Mostly clear. Mild. Inversion developing. |
| Saturday | Filtered sunshine. Very mild. Inversion. |
Washington Pass and Leavenworth
| Friday Night | Periods of high clouds and clear skies. Inversion conditions. Fog and low stratus lingering in the lowlands. |
| Saturday | Filtered sunshine. Mild. Inversion. Fog and low stratus lingering in the lowlands. |
Stevens and Snoqualmie Pass
| Friday Night | Periods of high clouds and clear skies. Inversion conditions.Fog and low stratus lingering in the lowlands. Moderate east flow through the passes. |
| Saturday | Filtered sunshine, partly clearing in the afternoon. Mild. Inversion. Fog and low stratus lingering in the lowlands. Moderate east flow through the passes. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Periods of high clouds and clear skies. Inversion conditions. |
| Saturday | Filtered sunshine, mostly clearing in the afternoon. Mild. Inversion. |
Mt. Hood
| Friday Night | Mix of high clouds and clear skies. Mild. Inversion developing. |
| Saturday | Mix of high clouds and sunnies skies with a clearing trend in the afternoon. Mild. Inversion developing. |
Issued: 2:51 PM PST Friday, January 11, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Evening | Freezing Level * | 8500' | 8000' | 2000' | 1500' | 2500' | 9000' | 9000' | 9000' |
| Friday Night | Freezing Level * | 8500' | 8500' | 2500' | 1500' | 2500' | 9000' | 9000' | 9000' |
| Saturday Morning | Freezing Level * | 8000' | 8500' | 8000' | 8000' | 8000' | 8000' | 8500' | 8500' |
| Saturday Afternoon | Freezing Level * | 7000' | 8000' | 8000' | 8000' | 8000' | 8000' | 8000' | 9000' |
| Saturday Evening | Freezing Level * | 7500' | 8000' | 7500' | 7500' | 7500' | 8000' | 8500' | 9000' |
| Saturday Night | Freezing Level * | 8000' | 8000' | 8500' | 9500' | 9500' | 9500' | 10000' | 10000' |
| Sunday Morning | Freezing Level * | 9500' | 9500' | 10000' | 10500' | 10500' | 10500' | 10000' | 1000' |
| Sunday Afternoon | Freezing Level * | 10000' | 10000' | 10500' | 10500' | 10500' | 10500' | 10500' | 10000' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Freezing Level 8500' (Easterly Flow *) |
| Friday Night |
Freezing Level 8500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 7000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 8000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 9500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Friday Night |
Freezing Level 8500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 8000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 9500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Freezing Level 2000' (Easterly Flow *) |
| Friday Night |
Freezing Level 2500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 8500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 10000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 10500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Freezing Level 1500' (Easterly Flow *) |
| Friday Night |
Freezing Level 1500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 9500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 10500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 10500' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Freezing Level 2500' (Easterly Flow *) |
| Friday Night |
Freezing Level 2500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 9500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 10500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 10500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Friday Night |
Freezing Level 9000' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 9500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 10500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 10500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Friday Night |
Freezing Level 9000' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 8500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 10000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 10000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 10500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Friday Night |
Freezing Level 9000' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 9000' (Easterly Flow *) |
| Saturday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 10000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 10000' (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 Night | Thursday | Thursday Night | Thursday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | 0 | 0 |
| Mt Baker Ski Area | 0 | 0 | 0 | 0 |
| Washington Pass | 0 | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | 0 | 0 |
| Snoqualmie Pass | 0 | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | 0 | 0 | 0 | 0 |
| Paradise | 0 | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | 0 | 0 | 0 |
| Timberline | 0 | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | 0 |
| Thursday | 0 |
| Thursday Night | 0 |
| Thursday | 0 |
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: 2:51 PM PST Friday, January 11, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | E 10 - 20 | E 5 - 15 | E 10 - 20 | E 5 - 15 | ESE 15 - 25 |
| Friday Night | E 5 - 15 | E 5 - 15 | E 10 - 20 | ESE 5 - 15 | ESE 15 - 25 |
| Saturday Morning | ESE 5 - 15 | E 5 - 15 | ESE 10 - 20 | ESE 5 - 15 | E 15 - 25 |
| Saturday Afternoon | ESE 0 - 10 | E 5 - 15 | E 10 - 20 | E 5 - 15 | E 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | E 10 - 20 |
| Friday Night | E 5 - 15 |
| Saturday Morning | ESE 5 - 15 |
| Saturday Afternoon | ESE 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | E 5 - 15 |
| Friday Night | E 5 - 15 |
| Saturday Morning | E 5 - 15 |
| Saturday Afternoon | E 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | E 10 - 20 |
| Friday Night | E 10 - 20 |
| Saturday Morning | ESE 10 - 20 |
| Saturday Afternoon | E 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | E 5 - 15 |
| Friday Night | ESE 5 - 15 |
| Saturday Morning | ESE 5 - 15 |
| Saturday Afternoon | E 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | ESE 15 - 25 |
| Friday Night | ESE 15 - 25 |
| Saturday Morning | E 15 - 25 |
| Saturday Afternoon | E 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | E 10 - 20 |
| Friday Night | E 5 - 15 |
| Saturday Morning | ESE 5 - 15 |
| Saturday Afternoon | ESE 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | E 5 - 15 |
| Friday Night | E 5 - 15 |
| Saturday Morning | E 5 - 15 |
| Saturday Afternoon | E 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | E 10 - 20 |
| Friday Night | E 10 - 20 |
| Saturday Morning | ESE 10 - 20 |
| Saturday Afternoon | E 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | E 5 - 15 |
| Friday Night | ESE 5 - 15 |
| Saturday Morning | ESE 5 - 15 |
| Saturday Afternoon | E 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | ESE 15 - 25 |
| Friday Night | ESE 15 - 25 |
| Saturday Morning | E 15 - 25 |
| Saturday Afternoon | E 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 | |
|---|---|---|---|---|---|
| Friday Evening | S 20 - 30 | SSW 10 - 20 | SSE 20 - 30 | S 20 - 30 | S 25 - 35 |
| Friday Night | S 20 - 30 | S 15 - 25 | S 25 - 35 | S 25 - 35 | S 20 - 30 |
| Saturday Morning | S 20 - 30 | S 10 - 20 | S 15 - 25 | S 15 - 25 | S 20 - 30 |
| Saturday Afternoon | S 15 - 25 | SSW 10 - 20 | S 15 - 25 | S 20 - 30 | S 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | S 20 - 30 |
| Friday Night | S 20 - 30 |
| Saturday Morning | S 20 - 30 |
| Saturday Afternoon | S 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | SSW 10 - 20 |
| Friday Night | S 15 - 25 |
| Saturday Morning | S 10 - 20 |
| Saturday Afternoon | SSW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | SSE 20 - 30 |
| Friday Night | S 25 - 35 |
| Saturday Morning | S 15 - 25 |
| Saturday Afternoon | S 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | S 20 - 30 |
| Friday Night | S 25 - 35 |
| Saturday Morning | S 15 - 25 |
| Saturday Afternoon | S 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | S 25 - 35 |
| Friday Night | S 20 - 30 |
| Saturday Morning | S 20 - 30 |
| Saturday Afternoon | S 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: 2:51 PM PST Friday, January 11, 2019
Extended Weather Synopsis for Thursday night through Thursday
Sunday night, a cutoff low sits off the California coast in tandem with the high centered over Idaho. Mild, inversion, easterly flow conditions persist.
On Monday, the cutoff low rejoins the subtropical jetstream, but the ridge lingers over our region.
Monday night through Tuesday night, the cutoff low near California and the two jet streams rejoin and the system begins to move northward toward our region.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Freezing Level | 9000' - 11000' | 9000' - 11000' | 9000' - 11000' | * |
| Monday | Freezing Level | 9000' - 11000' | 8000' - 10000' | 8000' - 10000' | * |
| Monday Night | Freezing Level | 6500' - 8500' | 5000' - 7000' | 5000' - 7000' | * |
| Tuesday | Freezing Level | 5500' - 7500' | 4000' - 6000' | 4000' - 6000' | * |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Freezing Level 9000' - 11000' (Easterly Flow *) |
| Monday |
Freezing Level 9000' - 11000' (Easterly Flow *) |
| Monday Night |
Freezing Level 6500' - 8500' (Easterly Flow *) |
| Tuesday |
Freezing Level 5500' - 7500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Freezing Level 9000' - 11000' (Easterly Flow *) |
| Monday |
Freezing Level 8000' - 10000' (Easterly Flow *) |
| Monday Night |
Freezing Level 5000' - 7000' (Easterly Flow *) |
| Tuesday |
Freezing Level 4000' - 6000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Freezing Level 9000' - 11000' (Easterly Flow *) |
| Monday |
Freezing Level 8000' - 10000' (Easterly Flow *) |
| Monday Night |
Freezing Level 5000' - 7000' (Easterly Flow *) |
| Tuesday |
Freezing Level 4000' - 6000' (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 11, 2019
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