Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Thursday night through Friday
The Pacific Northwest will be quite mild at the end of this prolonged period of warm generally southerly flow which has scoured out the cold air pool east of the Cascade Crest. Meanwhile, a ridge is amplifying across the Inter-mountain West, pushing out the last moisture from the moist southerly flow during the early evening hours. The ridge diverts storms to the north and south of our region. It will also re-amplify the pressure gradient across the Cascades, setting up a prolonged pattern of moderate easterly flow. Inversion conditions will also develop, leaving a shallow pool of cold air in the deeper valleys east of the Cascade Crest. This low cloud will likely stream through the lower Cascade passes.
The Freezing level will climb to 7000 ft or higher in many locations west of the Cascade Crest Friday through Saturday. Expect cooler temperature through the pass and on the east slopes with the inversion conditions in place.
Weather Forecast
Hurricane Ridge
| Thursday Night | Mostly cloudy with decreasing clouds toward daybreak. Moderate and gusty winds in the evening gradually decreasing. |
| Friday | Filtered sunshine. Light to occasionally moderate winds. |
Mt. Baker
| Thursday Night | Very light showers ending in the early evening, then high cloud cover. Moderate winds. |
| Friday | Filtered sunlight early. Becoming mostly sunny late in the day. Light winds. |
Washington Pass and Leavenworth
| Thursday Night | High cloud cover. Inversion conditions developing with low clouds and fog in the valleys. Light to moderate winds. Easterly low-level flow developing. |
| Friday | Decreasing low clouds and fog in the morning with high clouds decreasing throughout the day. Easterly flow. Light winds. |
Stevens and Snoqualmie Pass
| Thursday Night | High cloud cover. Inversion conditions developing with low clouds and fog in the valleys near and east of the Cascade Crest. Accelerating winds west of the major mountain gaps. Moderate low-level easterly flow with light to moderate winds aloft. |
| Friday | Decreasing low clouds and fog in the morning with high clouds decreasing throughout the day. Moderate easterly flow. Light winds. |
Mt. Rainier, Crystal and White Pass
| Thursday Night | High cloud cover. Inversion conditions developing with low clouds and fog in the valleys. Light to moderate winds. Easterly low-level flow developing. |
| Friday | Decreasing low clouds and fog in the morning with high clouds decreasing throughout the day. Moderate easterly flow. Light winds. |
Mt. Hood
| Thursday Night | Clear skies early then high clouds. Moderate easterly low-level flow developing. Moderate ridge-top winds. Inversion conditions developing. |
| Friday | A mix of filtered sunshine and sunshine with moderate winds slightly stronger in the morning. Inversion conditions. |
Issued: 2:31 PM PST Thursday, January 10, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Thursday Evening | Snow Level * | 5000' | 4500' | 4000' | 4500' | 4500' | 5000' | 5000' | 6000' |
| Thursday Night | Snow Level * | 5500' | 4500' | 3000' | 3000' | 3000' | 5000' | 5000' | 6500' |
| Friday Morning | Freezing Level * | 7000' | 5000' | 3500' | 3500' | 4000' | 6000' | 6000' | 6500' |
| Friday Afternoon | Freezing Level * | 7500' | 7000' | 4500' | 4000' | 5000' | 7000' | 7000' | 7500' |
| Friday Evening | Freezing Level * | 8500' | 7500' | 5000' | 4000' | 5000' | 7500' | 7500' | 8000' |
| Friday Night | Freezing Level * | 9000' | 6000' | 4500' | 3500' | 4500' | 7500' | 7000' | 7000' |
| Saturday Morning | Freezing Level * | 8000' | 5500' | 4500' | 3000' | 4000' | 6500' | 5500' | 6000' |
| Saturday Afternoon | Freezing Level * | 7000' | 7500' | 5500' | 5000' | 5500' | 6800' | 6500' | 7000' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening |
Snow Level 5000' (Easterly Flow *) |
| Thursday Night |
Snow Level 5500' (Easterly Flow *) |
| Friday Morning |
Freezing Level 7000' (Easterly Flow *) |
| Friday Afternoon |
Freezing Level 7500' (Easterly Flow *) |
| Friday Evening |
Freezing Level 8500' (Easterly Flow *) |
| Friday Night |
Freezing Level 9000' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 7000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening |
Snow Level 4500' (Easterly Flow *) |
| Thursday Night |
Snow Level 4500' (Easterly Flow *) |
| Friday Morning |
Freezing Level 5000' (Easterly Flow *) |
| Friday Afternoon |
Freezing Level 7000' (Easterly Flow *) |
| Friday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Friday Night |
Freezing Level 6000' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 5500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 7500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 4000' (Easterly Flow *) |
| Thursday Night |
Snow Level 3000' (Easterly Flow *) |
| Friday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Friday Afternoon |
Freezing Level 4500' (Easterly Flow *) |
| Friday Evening |
Freezing Level 5000' (Easterly Flow *) |
| Friday Night |
Freezing Level 4500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Thursday Evening |
Snow Level 4500' (Easterly Flow *) |
| Thursday Night |
Snow Level 3000' (Easterly Flow *) |
| Friday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Friday Afternoon |
Freezing Level 4000' (Easterly Flow *) |
| Friday Evening |
Freezing Level 4000' (Easterly Flow *) |
| Friday Night |
Freezing Level 3500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 5000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 4500' (Easterly Flow *) |
| Thursday Night |
Snow Level 3000' (Easterly Flow *) |
| Friday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Friday Afternoon |
Freezing Level 5000' (Easterly Flow *) |
| Friday Evening |
Freezing Level 5000' (Easterly Flow *) |
| Friday Night |
Freezing Level 4500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 4000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 5000' (Easterly Flow *) |
| Thursday Night |
Snow Level 5000' (Easterly Flow *) |
| Friday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Friday Afternoon |
Freezing Level 7000' (Easterly Flow *) |
| Friday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Friday Night |
Freezing Level 7500' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 6800' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Evening |
Snow Level 5000' (Easterly Flow *) |
| Thursday Night |
Snow Level 5000' (Easterly Flow *) |
| Friday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Friday Afternoon |
Freezing Level 7000' (Easterly Flow *) |
| Friday Evening |
Freezing Level 7500' (Easterly Flow *) |
| Friday Night |
Freezing Level 7000' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 5500' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening |
Snow Level 6000' (Easterly Flow *) |
| Thursday Night |
Snow Level 6500' (Easterly Flow *) |
| Friday Morning |
Freezing Level 6500' (Easterly Flow *) |
| Friday Afternoon |
Freezing Level 7500' (Easterly Flow *) |
| Friday Evening |
Freezing Level 8000' (Easterly Flow *) |
| Friday Night |
Freezing Level 7000' (Easterly Flow *) |
| Saturday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Saturday Afternoon |
Freezing Level 7000' (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 Night | Friday | Friday Night | Friday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | 0 | 0 | 0 |
| Mt Baker Ski Area | LT 0.10 | 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 |
|---|---|
| Thursday Night | LT 0.10 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Thursday Night | 0 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 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: 2:31 PM PST Thursday, January 10, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Evening | SSE 25 - 35 | SE 15 - 25 | ESE 5 - 15 | ESE 5 - 15 | ESE 15 - 25 |
| Thursday Night | SSE 15 - 25 | ESE 10 - 20 | ESE 10 - 20 | ESE 5 - 15 | ESE 15 - 25 |
| Friday Morning | SSE 10 - 20 | E 5 - 15 | ESE 10 - 20 | ESE 10 - 20 | ESE 20 - 30 |
| Friday Afternoon | ESE 10 - 20 | E 5 - 15 | E 10 - 20 | E 10 - 20 | ESE 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening | SSE 25 - 35 |
| Thursday Night | SSE 15 - 25 |
| Friday Morning | SSE 10 - 20 |
| Friday Afternoon | ESE 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening | SE 15 - 25 |
| Thursday Night | ESE 10 - 20 |
| Friday Morning | E 5 - 15 |
| Friday Afternoon | E 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening | ESE 5 - 15 |
| Thursday Night | ESE 10 - 20 |
| Friday Morning | ESE 10 - 20 |
| Friday Afternoon | E 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday Evening | ESE 5 - 15 |
| Thursday Night | ESE 5 - 15 |
| Friday Morning | ESE 10 - 20 |
| Friday Afternoon | E 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening | ESE 15 - 25 |
| Thursday Night | ESE 15 - 25 |
| Friday Morning | ESE 20 - 30 |
| Friday Afternoon | ESE 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday Evening | SSE 25 - 35 |
| Thursday Night | SSE 15 - 25 |
| Friday Morning | SSE 10 - 20 |
| Friday Afternoon | ESE 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | SE 15 - 25 |
| Thursday Night | ESE 10 - 20 |
| Friday Morning | E 5 - 15 |
| Friday Afternoon | E 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | ESE 5 - 15 |
| Thursday Night | ESE 10 - 20 |
| Friday Morning | ESE 10 - 20 |
| Friday Afternoon | E 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | ESE 5 - 15 |
| Thursday Night | ESE 5 - 15 |
| Friday Morning | ESE 10 - 20 |
| Friday Afternoon | E 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | ESE 15 - 25 |
| Thursday Night | ESE 15 - 25 |
| Friday Morning | ESE 20 - 30 |
| Friday Afternoon | ESE 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 | |
|---|---|---|---|---|---|
| Thursday Evening | S 20 - 30 | SSW 15 - 25 | SSW 15 - 25 | S 20 - 30 | S 20 - 30 |
| Thursday Night | S 25 - 35 | S 15 - 25 | SSW 15 - 25 | S 20 - 30 | S 20 - 30 |
| Friday Morning | S 20 - 30 | S 15 - 25 | SSE 15 - 25 | SSE 20 - 30 | SSE 20 - 30 |
| Friday Afternoon | S 15 - 25 | S 15 - 25 | S 15 - 25 | S 15 - 25 | S 20 - 30 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | S 20 - 30 |
| Thursday Night | S 25 - 35 |
| Friday Morning | S 20 - 30 |
| Friday Afternoon | S 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday Evening | SSW 15 - 25 |
| Thursday Night | S 15 - 25 |
| Friday Morning | S 15 - 25 |
| Friday Afternoon | S 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | SSW 15 - 25 |
| Thursday Night | SSW 15 - 25 |
| Friday Morning | SSE 15 - 25 |
| Friday Afternoon | S 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | S 20 - 30 |
| Thursday Night | S 20 - 30 |
| Friday Morning | SSE 20 - 30 |
| Friday Afternoon | S 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | S 20 - 30 |
| Thursday Night | S 20 - 30 |
| Friday Morning | SSE 20 - 30 |
| Friday 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: 2:31 PM PST Thursday, January 10, 2019
Extended Weather Synopsis for Friday night through Friday
The high-pressure ridge will remain strong over the Pacific Northwest Saturday night through Monday, continuing the pattern from Friday and Saturday. Very high freezing levels are anticipated in the 8,000-11,000 ft range.
The system set to break down the ridge on Tuesday will be a cutoff low just offshore of the California coast which is projected to begin moving northward and will likely impact the region Tuesday night or Wednesday.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Saturday Night | Freezing Level | 5500' - 6500' | 4500' - 6500' | 5500' - 6500' | * |
| Sunday | Freezing Level | 6000' - 7000' | 6500' - 7500' | 7000' - 8000' | * |
| Sunday Night | Freezing Level | 8000' - 10000' | 9000' - 11000' | 9000' - 11000' | * |
| Monday | Freezing Level | 8000' - 10000' | 8000' - 10000' | 8000' - 10000' | * |
| Mt. Baker | Elevation |
|---|---|
| Saturday Night |
Freezing Level 5500' - 6500' (Easterly Flow *) |
| Sunday |
Freezing Level 6000' - 7000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 8000' - 10000' (Easterly Flow *) |
| Monday |
Freezing Level 8000' - 10000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Night |
Freezing Level 4500' - 6500' (Easterly Flow *) |
| Sunday |
Freezing Level 6500' - 7500' (Easterly Flow *) |
| Sunday Night |
Freezing Level 9000' - 11000' (Easterly Flow *) |
| Monday |
Freezing Level 8000' - 10000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Night |
Freezing Level 5500' - 6500' (Easterly Flow *) |
| Sunday |
Freezing Level 7000' - 8000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 9000' - 11000' (Easterly Flow *) |
| Monday |
Freezing Level 8000' - 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.
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 10, 2019
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