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 Saturday
A low pressure system is passing well to our south as the jet stream remains focused into California. A weak upper level trough passing through the Cascades overnight should bring an increase in generally light showers.
A compact low pressure system will enter the Washington coastal waters Friday, with the weakening frontal band passing inland and into the Cascades Friday night. Isolated showers with some sunbreaks are likely on Friday. Mt. Hood and the south Washington Cascades stand the best chance to pick up several inches of snow through Saturday morning.
The remanant upper low will weaken and drift inland into northern Oregon on Saturday, keeping scattered showers in the forecast.
Weather Forecast
Hurricane Ridge
| Thursday Night | Partly cloudy in the evening, becoming mostly cloudy with scattered light rain and snow showers after midnight. |
| Friday | Mostly cloudy with scattered light rain and snow showers. |
Mt. Baker
| Thursday Night | Partly cloudy in the evening, becoming mostly cloudy with scattered light rain and snow showers after midnight. |
| Friday | Mostly cloudy with scattered light rain and snow showers. |
Stevens and Snoqualmie Pass
| Thursday Night | Partly cloudy in the evening, becoming mostly cloudy with scattered light rain and snow showers after midnight. |
| Friday | Mostly cloudy with scattered light rain and snow showers. |
Mt. Rainier and Crystal
| Thursday Night | Partly cloudy in the evening, becoming mostly cloudy with scattered light rain and snow showers after midnight. |
| Friday | Mostly cloudy with scattered light rain and snow showers. |
Washington Pass and Leavenworth
| Thursday Night | Partly cloudy in the evening, becoming mostly cloudy with scattered light rain and snow showers after midnight. |
| Friday | Partly to mostly cloudy with isolated light rain and snow showers. |
Mt. Hood
| Thursday Night | Partly cloudy in the evening, becoming mostly cloudy with scattered light rain and snow showers after midnight. |
| Friday | Mostly cloudy with scattered light rain and snow showers. |
Issued: 3:25 PM PST Thursday, November 29, 2018
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 | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 4000' | 4000' |
| Thursday Night | Snow Level | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 4000' | 4000' |
| Friday Morning | Snow Level | 3000' | 3000' | 3000' | 3000' | 3000' | 3500' | 3500' | 3500' |
| Friday Afternoon | Snow Level | 3000' | 3000' | 3500' | 3500' | 3500' | 3500' | 3500' | 4000' |
| Friday Evening | Snow Level | 3000' | 3000' | 3000' | 3000' | 3000' | 3000' | 3000' | 3500' |
| Friday Night | Snow Level | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' |
| Saturday Morning | Snow Level | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' |
| Saturday Afternoon | Snow Level | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' | 2500' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening |
Snow Level 3500' |
| Thursday Night |
Snow Level 3500' |
| Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3000' |
| Friday Evening |
Snow Level 3000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening |
Snow Level 3500' |
| Thursday Night |
Snow Level 3500' |
| Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3000' |
| Friday Evening |
Snow Level 3000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 3500' |
| Thursday Night |
Snow Level 3500' |
| Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Evening |
Snow Level 3000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' |
| Leavenworth | Elevation |
|---|---|
| Thursday Evening |
Snow Level 3500' |
| Thursday Night |
Snow Level 3500' |
| Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Evening |
Snow Level 3000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' |
| Stevens Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 3500' |
| Thursday Night |
Snow Level 3500' |
| Friday Morning |
Snow Level 3000' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Evening |
Snow Level 3000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening |
Snow Level 3500' |
| Thursday Night |
Snow Level 3500' |
| Friday Morning |
Snow Level 3500' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Evening |
Snow Level 3000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Evening |
Snow Level 4000' |
| Thursday Night |
Snow Level 4000' |
| Friday Morning |
Snow Level 3500' |
| Friday Afternoon |
Snow Level 3500' |
| Friday Evening |
Snow Level 3000' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 2500' |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening |
Snow Level 4000' |
| Thursday Night |
Snow Level 4000' |
| Friday Morning |
Snow Level 3500' |
| Friday Afternoon |
Snow Level 4000' |
| Friday Evening |
Snow Level 3500' |
| Friday Night |
Snow Level 2500' |
| Saturday Morning |
Snow Level 2500' |
| Saturday Afternoon |
Snow Level 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.
Precipitation Forecast
| Thursday Night | Saturday | Saturday Night | Saturday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | LT 0.10 | LT 0.25 | LT 0.10 |
| Mt Baker Ski Area | LT 0.25 | LT 0.10 | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | LT 0.10 | LT 0.10 | LT 0.25 |
| Snoqualmie Pass | LT 0.10 | LT 0.10 | LT 0.25 | LT 0.25 |
| Leavenworth | LT 0.10 | 0 | LT 0.10 | LT 0.25 |
| Mission Ridge | LT 0.10 | 0 | LT 0.25 | LT 0.25 |
| Crystal Mt | LT 0.10 | LT 0.10 | 0.25 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.25 | 0.25 - 0.50 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 | 0.25 | LT 0.10 |
| Mt Hood Meadows | LT 0.25 | LT 0.25 | 0.25 - 0.50 | 0.25 |
| Timberline | LT 0.25 | 0.25 | 0.50 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Saturday Night | LT 0.25 |
| Saturday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.25 |
| Saturday | LT 0.10 |
| Saturday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Saturday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Saturday Night | LT 0.10 |
| Saturday | LT 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Saturday Night | LT 0.25 |
| Saturday | LT 0.25 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0 |
| Saturday Night | LT 0.10 |
| Saturday | LT 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | 0 |
| Saturday Night | LT 0.25 |
| Saturday | LT 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 |
| Saturday | LT 0.10 |
| Paradise | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.25 |
| Saturday Night | 0.25 - 0.50 |
| Saturday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.10 |
| Saturday | LT 0.10 |
| Saturday Night | 0.25 |
| Saturday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.25 |
| Saturday | LT 0.25 |
| Saturday Night | 0.25 - 0.50 |
| Saturday | 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Thursday Night | LT 0.25 |
| Saturday | 0.25 |
| Saturday Night | 0.50 |
| Saturday | 0.25 |
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: 3:25 PM PST Thursday, November 29, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Evening | SW 0 - 10 | SE 0 - 10 | SE 0 - 10 | VAR 0 - 10 | VAR 0 - 10 |
| Thursday Night | SW 0 - 10 | SW 0 - 10 | WSW 0 - 10 | SW 0 - 10 | W 10 - 20 |
| Friday Morning | S 5 - 15 | S 0 - 10 | WSW 0 - 10 | SSW 5 - 15 | WSW 15 - 25 |
| Friday Afternoon | S 5 - 15 | S 0 - 10 | SW 0 - 10 | SW 5 - 15 | SW 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Evening | SW 0 - 10 |
| Thursday Night | SW 0 - 10 |
| Friday Morning | S 5 - 15 |
| Friday Afternoon | S 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Thursday Evening | SE 0 - 10 |
| Thursday Night | SW 0 - 10 |
| Friday Morning | S 0 - 10 |
| Friday Afternoon | S 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday Evening | SE 0 - 10 |
| Thursday Night | WSW 0 - 10 |
| Friday Morning | WSW 0 - 10 |
| Friday Afternoon | SW 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday Evening | VAR 0 - 10 |
| Thursday Night | SW 0 - 10 |
| Friday Morning | SSW 5 - 15 |
| Friday Afternoon | SW 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Thursday Evening | VAR 0 - 10 |
| Thursday Night | W 10 - 20 |
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | SW 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday Evening | SW 0 - 10 |
| Thursday Night | SW 0 - 10 |
| Friday Morning | S 5 - 15 |
| Friday Afternoon | S 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | SE 0 - 10 |
| Thursday Night | SW 0 - 10 |
| Friday Morning | S 0 - 10 |
| Friday Afternoon | S 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | SE 0 - 10 |
| Thursday Night | WSW 0 - 10 |
| Friday Morning | WSW 0 - 10 |
| Friday Afternoon | SW 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | VAR 0 - 10 |
| Thursday Night | SW 0 - 10 |
| Friday Morning | SSW 5 - 15 |
| Friday Afternoon | SW 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | VAR 0 - 10 |
| Thursday Night | W 10 - 20 |
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | SW 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 | |
|---|---|---|---|---|---|
| Thursday Evening | SW 0 - 10 | SW 0 - 10 | SW 5 - 15 | SW 5 - 15 | WSW 5 - 15 |
| Thursday Night | SW 5 - 15 | SW 0 - 10 | WSW 15 - 25 | WSW 10 - 20 | W 15 - 25 |
| Friday Morning | SW 5 - 15 | WSW 5 - 15 | WSW 15 - 25 | WSW 10 - 20 | W 15 - 25 |
| Friday Afternoon | S 10 - 20 | SW 5 - 15 | SW 15 - 25 | SW 15 - 25 | SW 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Evening | SW 0 - 10 |
| Thursday Night | SW 5 - 15 |
| Friday Morning | SW 5 - 15 |
| Friday Afternoon | S 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday Evening | SW 0 - 10 |
| Thursday Night | SW 0 - 10 |
| Friday Morning | WSW 5 - 15 |
| Friday Afternoon | SW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Evening | SW 5 - 15 |
| Thursday Night | WSW 15 - 25 |
| Friday Morning | WSW 15 - 25 |
| Friday Afternoon | SW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Evening | SW 5 - 15 |
| Thursday Night | WSW 10 - 20 |
| Friday Morning | WSW 10 - 20 |
| Friday Afternoon | SW 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Evening | WSW 5 - 15 |
| Thursday Night | W 15 - 25 |
| Friday Morning | W 15 - 25 |
| Friday Afternoon | SW 25 - 35 |
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: 3:25 PM PST Thursday, November 29, 2018
Extended Weather Synopsis for Saturday night through Saturday
The Pacific Northwest will be on the backside of a broad longwave trough carved out over the central and western U.S. Weak disturbances sliding down just offshore will keep isolated showers in the forecast Saturday night and Sunday, but no meaningful precipitation is expected. Surface high pressure will begin to build into British Columbia on Monday, along with increasing offshore surface gradients/easterly flow. Dry and cool conditions are expected Monday.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Saturday Night | Snow Level | 1000' - 2000' | 1000' - 2000' | 1000' - 2000' | |
| Sunday | Snow Level | 1000' - 2000' | 1500' - 2500' | 2000' - 3000' | |
| Sunday Night | Freezing Level | 500' - 1500' | 1000' - 2000' | 1000' - 2000' | * |
| Monday | Freezing Level | 1000' - 2000' | 1000' - 2000' | 1000' - 2000' | * |
| Mt. Baker | Elevation |
|---|---|
| Saturday Night |
Snow Level 1000' - 2000' |
| Sunday |
Snow Level 1000' - 2000' |
| Sunday Night |
Freezing Level 500' - 1500' (Easterly Flow *) |
| Monday |
Freezing Level 1000' - 2000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Night |
Snow Level 1000' - 2000' |
| Sunday |
Snow Level 1500' - 2500' |
| Sunday Night |
Freezing Level 1000' - 2000' (Easterly Flow *) |
| Monday |
Freezing Level 1000' - 2000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Night |
Snow Level 1000' - 2000' |
| Sunday |
Snow Level 2000' - 3000' |
| Sunday Night |
Freezing Level 1000' - 2000' (Easterly Flow *) |
| Monday |
Freezing Level 1000' - 2000' (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 Nov 26, 2018
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