Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Monday night through Friday
A broad trough sits over the region and deepens throughout the forecast period. The moist WNW flow that brought some accumulating snows to our mountains Sunday night and Monday shifts slightly NWerly Monday night. The moist flow begins to weaken and reduce snow shower activity Monday night, but not before areas such as Mt Hood and the Central and Southern Washington Cascades pick up a bit more snow out of convective showers and weakening convergence zone activity.
A rapidly strengthening storm aims for the southern Oregon coast on an unusual track from the NW on Tuesday. The storm will increase clouds across the region late Monday night and then the precipitation shield likely spreads into the SW Washington Cascades and Mt. Hood region on Tuesday afternoon. Winds will switch easterly on Tuesday and increase throughout the day.
Moderate to heavy snow is possible for the Mt. Hood region Tuesday night as the trough centers on south-central Oregon, with light to Moderate snow accumulating along ridgelines east of the Cascade Crest of Washington. Light to locally moderate upslope snow could continue Wednesday as strong E and NE winds blow Tuesday night through Wednesday and will be particularly strong east of the Cascade Crest. The Cascade Passes are not expected to get much if any snow out of this event, but Mt. Hood could see upwards of 1 foot of snow with Mission Ridge picking up notable totals as well.
Weather Forecast
Hurricane Ridge
| Monday Night | Partly cloudy with a chance of snow flurries early then becoming cloudy. |
| Tuesday | Cloudy. Chance of snow showers on east slopes of Olympics. |
Mt. Baker
| Monday Night | A chance of light snow showers in the evening. |
| Tuesday | Cloudy with a chance of flurries. |
Washington Pass and Leavenworth
| Monday Night | A chance of snow showers near the Cascade Crest. Otherwise, partly cloudy. Cold. |
| Tuesday | Cloudy with increasing chances of light snow developing late in the day as winds shift easterly. |
Stevens and Snoqualmie Pass
| Monday Night | Cloudy with diminishing light snow showers, heaviest in areas of weak convergence; more likely near Snoqualmie than Stevens Pass. Light and variable wind through the Passes. |
| Tuesday | Cloudy with a chance of snow flurries. Light E wind becoming moderate late in the day through the Passes. |
Mt. Rainier, Crystal and White Pass
| Monday Night | Cloudy with a chance of snow showers, heaviest in areas of weak convergence. |
| Tuesday | Cloudy with a chance of light snow developing toward mid-day, mainly for areas further south and west such as Mt. St. Helens to Paradise. |
Mt. Hood
| Monday Night | Light to moderate snow shower activity decreasing after midnight. |
| Tuesday | Light to moderate snow developing in the afternoon. Increasing E winds. |
Issued: 2:40 PM PST Monday, November 25, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Evening | Snow Level | 2000' | 1500' | 1500' | 1500' | 1000' | 1000' | 1500' | 2000' |
| Monday Night | Snow Level | 1500' | 500' | 500' | 1000' | 1000' | 1000' | 1000' | 1500' |
| Tuesday Morning | Snow Level * | 1500' | 500' | 500' | 500' | 500' | 1000' | 1000' | 1500' |
| Tuesday Afternoon | Snow Level * | 1500' | 500' | 500' | 500' | 500' | 1000' | 1500' | 1500' |
| Tuesday Evening | Snow Level * | 1000' | 1000' | 500' | 500' | 500' | 500' | 500' | 1000' |
| Tuesday Night | Snow Level * | 1000' | 0' | 0' | 0' | 0' | 500' | 500' | 500' |
| Wednesday Morning | Snow Level * | 1500' | 500' | 500' | 1000' | 1000' | 1000' | 1000' | 1000' |
| Wednesday Afternoon | Snow Level * | 1500' | 500' | 500' | 1000' | 1000' | 1000' | 1000' | 1000' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Evening |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 500' |
| Tuesday Morning |
Snow Level 500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Tuesday Evening |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 0' (Easterly Flow *) |
| Wednesday Morning |
Snow Level 500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 500' |
| Tuesday Morning |
Snow Level 500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Tuesday Evening |
Snow Level 500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 0' (Easterly Flow *) |
| Wednesday Morning |
Snow Level 500' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Tuesday Evening |
Snow Level 500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 0' (Easterly Flow *) |
| Wednesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 1000' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 500' (Easterly Flow *) |
| Tuesday Evening |
Snow Level 500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 0' (Easterly Flow *) |
| Wednesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Snow Level 1000' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Evening |
Snow Level 500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 500' (Easterly Flow *) |
| Wednesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Snow Level 1500' |
| Monday Night |
Snow Level 1000' |
| Tuesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Evening |
Snow Level 500' (Easterly Flow *) |
| Tuesday Night |
Snow Level 500' (Easterly Flow *) |
| Wednesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Afternoon |
Snow Level 1000' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Snow Level 2000' |
| Monday Night |
Snow Level 1500' |
| Tuesday Morning |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Afternoon |
Snow Level 1500' (Easterly Flow *) |
| Tuesday Evening |
Snow Level 1000' (Easterly Flow *) |
| Tuesday Night |
Snow Level 500' (Easterly Flow *) |
| Wednesday Morning |
Snow Level 1000' (Easterly Flow *) |
| Wednesday Afternoon |
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
| Monday Night | Friday | Friday Night | Friday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | 0 | 0 | 0 |
| Washington Pass | LT 0.25 | 0 | LT 0.10 | LT 0.10 |
| Leavenworth | 0 | 0 | LT 0.10 | 0 |
| Stevens Pass | LT 0.25 | 0 | LT 0.10 | 0 |
| Snoqualmie Pass | LT 0.10 | 0 | 0 | 0 |
| Mission Ridge | 0 | LT 0.10 | 0.50 | 0.25 |
| Crystal Mt | LT 0.25 | LT 0.10 | LT 0.10 | 0 |
| Paradise | LT 0.25 | LT 0.25 | LT 0.10 | 0 |
| White Pass | LT 0.25 | LT 0.10 | 0.25 | LT 0.25 |
| Mt Hood Meadows | 0.25 - 0.50 | 0.25 - 0.50 | 0.75 | 0.25 |
| Timberline | 0.25 - 0.50 | 0.25 - 0.50 | 0.75 | 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Friday | 0 |
| Friday Night | LT 0.10 |
| Friday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Friday | 0 |
| Friday Night | LT 0.10 |
| Friday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Friday | 0 |
| Friday Night | LT 0.10 |
| Friday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Friday | 0 |
| Friday Night | LT 0.10 |
| Friday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Friday | 0 |
| Friday Night | 0 |
| Friday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Friday | LT 0.10 |
| Friday Night | 0.50 |
| Friday | 0.25 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Friday | LT 0.10 |
| Friday Night | LT 0.10 |
| Friday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Friday | LT 0.25 |
| Friday Night | LT 0.10 |
| Friday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.25 |
| Friday | LT 0.10 |
| Friday Night | 0.25 |
| Friday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 - 0.50 |
| Friday | 0.25 - 0.50 |
| Friday Night | 0.75 |
| Friday | 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | 0.25 - 0.50 |
| Friday | 0.25 - 0.50 |
| Friday Night | 0.75 |
| Friday | 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: 2:40 PM PST Monday, November 25, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | W 5 - 15 | WSW 5 - 15 | WNW 5 - 15 | WNW 5 - 15 | W 20 - 30 |
| Monday Night | W 5 - 15 | WSW 0 - 10 | W 0 - 10 | W 0 - 10 | W 15 - 25 |
| Tuesday Morning | ESE 0 - 10 | E 0 - 10 | E 0 - 10 | E 0 - 10 | VAR 0 - 10 |
| Tuesday Afternoon | ENE 5 - 15 | ENE 5 - 15 | E 10 - 20 | E 10 - 20 | E 15 - 25 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | W 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | ESE 0 - 10 |
| Tuesday Afternoon | ENE 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | WSW 5 - 15 |
| Monday Night | WSW 0 - 10 |
| Tuesday Morning | E 0 - 10 |
| Tuesday Afternoon | ENE 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | WNW 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | E 0 - 10 |
| Tuesday Afternoon | E 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | WNW 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | E 0 - 10 |
| Tuesday Afternoon | E 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | W 20 - 30 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | E 15 - 25 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | W 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | ESE 0 - 10 |
| Tuesday Afternoon | ENE 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | WSW 5 - 15 |
| Monday Night | WSW 0 - 10 |
| Tuesday Morning | E 0 - 10 |
| Tuesday Afternoon | ENE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | WNW 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | E 0 - 10 |
| Tuesday Afternoon | E 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | WNW 5 - 15 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | E 0 - 10 |
| Tuesday Afternoon | E 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | W 20 - 30 |
| Monday Night | W 15 - 25 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday 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 | |
|---|---|---|---|---|---|
| Monday Evening | WNW 10 - 20 | NW 5 - 15 | NW 15 - 25 | NW 15 - 25 | NW 30 - 40 |
| Monday Night | W 5 - 15 | VAR 0 - 10 | WNW 15 - 25 | WNW 15 - 25 | WNW 25 - 35 |
| Tuesday Morning | SE 0 - 10 | SE 5 - 15 | SSE 5 - 15 | SSW 5 - 15 | W 10 - 20 |
| Tuesday Afternoon | E 10 - 20 | E 15 - 25 | E 25 - 35 | ESE 20 - 30 | SE 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | WNW 10 - 20 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | SE 0 - 10 |
| Tuesday Afternoon | E 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 5 - 15 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | SE 5 - 15 |
| Tuesday Afternoon | E 15 - 25 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 15 - 25 |
| Monday Night | WNW 15 - 25 |
| Tuesday Morning | SSE 5 - 15 |
| Tuesday Afternoon | E 25 - 35 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | NW 15 - 25 |
| Monday Night | WNW 15 - 25 |
| Tuesday Morning | SSW 5 - 15 |
| Tuesday Afternoon | ESE 20 - 30 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | NW 30 - 40 |
| Monday Night | WNW 25 - 35 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | SE 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: 2:40 PM PST Monday, November 25, 2019
Extended Weather Synopsis for Friday night through Friday
The upslope snow event should diminish Wednesday night before the upper low drops far enough southward to cut off our moisture feed. E flow should continue through the mountain gaps and the sun should start coming out Thursday and Friday with continued cold temperatures.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Freezing Level | 0' - 2000' | 1000' - 2000' | 1000' - 2000' | * |
| Thursday | Freezing Level | 0' - 2000' | 0' - 2000' | 500' - 1500' | * |
| Thursday Night | Freezing Level | 500' - 1500' | 1000' - 2000' | 500' - 1500' | |
| Friday | Freezing Level | 1000' - 2000' | 1000' - 2000' | 500' - 1500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 0' - 2000' (Easterly Flow *) |
| Thursday |
Freezing Level 0' - 2000' (Easterly Flow *) |
| Thursday Night |
Freezing Level 500' - 1500' |
| Friday |
Freezing Level 1000' - 2000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 1000' - 2000' (Easterly Flow *) |
| Thursday |
Freezing Level 0' - 2000' (Easterly Flow *) |
| Thursday Night |
Freezing Level 1000' - 2000' |
| Friday |
Freezing Level 1000' - 2000' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 1000' - 2000' (Easterly Flow *) |
| Thursday |
Freezing Level 500' - 1500' (Easterly Flow *) |
| Thursday Night |
Freezing Level 500' - 1500' |
| Friday |
Freezing Level 500' - 1500' |
* 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 24, 2019
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.