Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Monday & Thursday
A vigorous cold front passed through the Cascades around 6 am this morning. Heavy post-frontal showers will continue to quickly pile up new snow above 3000' through at least late morning. 6-12" of snow is likely by the afternoon, with only slightly lower amounts along the east slopes of the Cascades. Beginning in the early afternoon, shower activity should begin to ease and become more scattered for most areas except where moderate showers are expected to continue for the West Hwy 2/Stevens Pass corridor and north to the Skagit/Whatcom line. This is the area most likely to see a convergence zone, but the westerly flow is strong enough that a defined PSCZ seems unlikely versus a more chaotic shower pattern. Post-frontal westerly winds will be strong and very gusty today for most areas as well, with the strong winds continuing through the afternoon and slowly pulling back overnight. Expect snowfall and strong west winds to spill over to the east slopes of the Cascades today as well.
Shower activity will wind down tonight as conditions dry out. A clearing trend should take place quickly, erasing low level clouds trapped along the west slopes of the Cascades Tuesday morning as a strong upper level ridge amplifies offshore. Sunshine and slightly rising freezing levels will be the norm on Tuesday. A broad area of warm air associated with the ridge won't make much headway into our mountains on Tuesday except for perhaps the Mt Hood area where alpine temperatures should pop above freezing in the afternoon. A significant offshore flow event with easterly winds should begin to kick into gear sometime late Tuesday afternoon.
Weather Forecast
Hurricane Ridge
Monday | Moderate snow showers becoming scattered light showers in the afternoon. Strong to extreme winds in the morning easing in the afternoon. |
Mt. Baker
Monday | Moderate to heavy snow showers becoming scattered showers in the afternoon. Strong to extreme winds in the morning easing in the afternoon. |
Washington Pass and Leavenworth
Monday | Moderate snow showers becoming scattered light to moderate showers in the afternoon, heaviest near the Cascade crest. Strong to extreme ridgeline winds. |
Stevens and Snoqualmie Pass
Monday | Moderate to occasionally heavy snow showers becoming scattered showers Snoqualmie Pass and light to moderate Stevens Pass in the afternoon. Strong to extreme west winds. |
Mt. Rainier, Crystal and White Pass
Monday | Moderate to heavy snow showers becoming scattered showers with a few sunbreaks possible in the afternoon. Strong to extreme winds. |
Mt. Hood
Monday | Moderate to heavy snow showers becoming scattered showers with a few sunbreaks possible in the afternoon. Strong to extreme winds. |
Issued: 7:06 AM PST Monday, November 30, 2020
Snow/Freezing Level (ft)
Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
---|---|---|---|---|---|---|---|---|---|
Monday Morning | Snow Level | 3000' | 3000' | 2000' | 2500' | 3000' | 3000' | 3500' | 4000' |
Monday Afternoon | Snow Level | 2000' | 2500' | 2000' | 2500' | 2500' | 2500' | 2500' | 3000' |
Monday Evening | Snow Level | 2000' | 2000' | 1500' | 2000' | 2000' | 2000' | 2000' | 2500' |
Monday Night | Snow Level | 1500' | 1000' | 0' | 1000' | 1000' | 1500' | 1500' | 2000' |
Tuesday Morning | Freezing Level | 3000' | 1500' | 1500' | 2500' | 2500' | 2500' | 3000' | 3000' |
Tuesday Afternoon | Freezing Level | 4500' | 4000' | 3500' | 3500' | 3500' | 3500' | 5000' | 7500' |
Hurricane Ridge | Elevation |
---|---|
Monday Morning |
Snow Level 3000' |
Monday Afternoon |
Snow Level 2000' |
Monday Evening |
Snow Level 2000' |
Monday Night |
Snow Level 1500' |
Tuesday Morning |
Freezing Level 3000' |
Tuesday Afternoon |
Freezing Level 4500' |
Mt. Baker | Elevation |
---|---|
Monday Morning |
Snow Level 3000' |
Monday Afternoon |
Snow Level 2500' |
Monday Evening |
Snow Level 2000' |
Monday Night |
Snow Level 1000' |
Tuesday Morning |
Freezing Level 1500' |
Tuesday Afternoon |
Freezing Level 4000' |
Washington Pass | Elevation |
---|---|
Monday Morning |
Snow Level 2000' |
Monday Afternoon |
Snow Level 2000' |
Monday Evening |
Snow Level 1500' |
Monday Night |
Snow Level 0' |
Tuesday Morning |
Freezing Level 1500' |
Tuesday Afternoon |
Freezing Level 3500' |
Leavenworth | Elevation |
---|---|
Monday Morning |
Snow Level 2500' |
Monday Afternoon |
Snow Level 2500' |
Monday Evening |
Snow Level 2000' |
Monday Night |
Snow Level 1000' |
Tuesday Morning |
Freezing Level 2500' |
Tuesday Afternoon |
Freezing Level 3500' |
Stevens Pass | Elevation |
---|---|
Monday Morning |
Snow Level 3000' |
Monday Afternoon |
Snow Level 2500' |
Monday Evening |
Snow Level 2000' |
Monday Night |
Snow Level 1000' |
Tuesday Morning |
Freezing Level 2500' |
Tuesday Afternoon |
Freezing Level 3500' |
Snoqualmie Pass | Elevation |
---|---|
Monday Morning |
Snow Level 3000' |
Monday Afternoon |
Snow Level 2500' |
Monday Evening |
Snow Level 2000' |
Monday Night |
Snow Level 1500' |
Tuesday Morning |
Freezing Level 2500' |
Tuesday Afternoon |
Freezing Level 3500' |
Mt. Rainier & Crystal | Elevation |
---|---|
Monday Morning |
Snow Level 3500' |
Monday Afternoon |
Snow Level 2500' |
Monday Evening |
Snow Level 2000' |
Monday Night |
Snow Level 1500' |
Tuesday Morning |
Freezing Level 3000' |
Tuesday Afternoon |
Freezing Level 5000' |
Mt. Hood | Elevation |
---|---|
Monday Morning |
Snow Level 4000' |
Monday Afternoon |
Snow Level 3000' |
Monday Evening |
Snow Level 2500' |
Monday Night |
Snow Level 2000' |
Tuesday Morning |
Freezing Level 3000' |
Tuesday Afternoon |
Freezing Level 7500' |
* 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 | Monday Night | Thursday | |
---|---|---|---|
4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
Hurricane Ridge | 0.25 - 0.50 | 0 | 0 |
Mt Baker Ski Area | 1.00 | 0 | 0 |
Washington Pass | 0.50 | 0 | 0 |
Leavenworth | 0.25 | 0 | 0 |
Stevens Pass | 0.75 | LT 0.10 | 0 |
Snoqualmie Pass | 0.50 - 0.75 | LT 0.10 | 0 |
Mission Ridge | LT 0.25 | 0 | 0 |
Crystal Mt | 0.50 | 0 | 0 |
Paradise | 0.75 -1.00 | 0 | 0 |
White Pass | 0.50 - 0.75 | 0 | 0 |
Mt Hood Meadows | 0.75 -1.00 | 0 | 0 |
Timberline | 0.75 -1.00 | 0 | 0 |
Hurricane Ridge | Precipitation Forecast |
---|---|
Monday | 0.25 - 0.50 |
Monday Night | 0 |
Thursday | 0 |
Mt Baker Ski Area | Precipitation Forecast |
---|---|
Monday | 1.00 |
Monday Night | 0 |
Thursday | 0 |
Washington Pass | Precipitation Forecast |
---|---|
Monday | 0.50 |
Monday Night | 0 |
Thursday | 0 |
Leavenworth | Precipitation Forecast |
---|---|
Monday | 0.25 |
Monday Night | 0 |
Thursday | 0 |
Stevens Pass | Precipitation Forecast |
---|---|
Monday | 0.75 |
Monday Night | LT 0.10 |
Thursday | 0 |
Snoqualmie Pass | Precipitation Forecast |
---|---|
Monday | 0.50 - 0.75 |
Monday Night | LT 0.10 |
Thursday | 0 |
Mission Ridge | Precipitation Forecast |
---|---|
Monday | LT 0.25 |
Monday Night | 0 |
Thursday | 0 |
Crystal Mt | Precipitation Forecast |
---|---|
Monday | 0.50 |
Monday Night | 0 |
Thursday | 0 |
Paradise | Precipitation Forecast |
---|---|
Monday | 0.75 -1.00 |
Monday Night | 0 |
Thursday | 0 |
White Pass | Precipitation Forecast |
---|---|
Monday | 0.50 - 0.75 |
Monday Night | 0 |
Thursday | 0 |
Mt Hood Meadows | Precipitation Forecast |
---|---|
Monday | 0.75 -1.00 |
Monday Night | 0 |
Thursday | 0 |
Timberline | Precipitation Forecast |
---|---|
Monday | 0.75 -1.00 |
Monday 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: 7:06 AM PST Monday, November 30, 2020
Free Winds at 5000' (mph)
Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
---|---|---|---|---|---|
Monday Morning | W 30 - 40 | SSW 35 - 45 | WSW 30 - 40 | WSW 30 - 40 | WSW 30 - 40 |
Monday Afternoon | W 20 - 30 | W 15 - 25 | W 30 - 40 | W 25 - 35 | W 30 - 40 |
Monday Evening | WNW 10 - 20 | WNW 5 - 15 | NW 15 - 25 | NW 10 - 20 | WNW 20 - 30 |
Monday Night | W 5 - 15 | W 0 - 10 | NW 10 - 20 | NW 5 - 15 | NW 10 - 20 |
Tuesday Morning | NW 0 - 10 | VAR 0 - 10 | WNW 5 - 15 | VAR 0 - 10 | VAR 0 - 10 |
Tuesday Afternoon | NE 0 - 10 | E 0 - 10 | ESE 5 - 15 | E 0 - 10 | ESE 5 - 15 |
Hurricane Ridge | Elevation |
---|---|
Monday Morning | W 30 - 40 |
Monday Afternoon | W 20 - 30 |
Monday Evening | WNW 10 - 20 |
Monday Night | W 5 - 15 |
Tuesday Morning | NW 0 - 10 |
Tuesday Afternoon | NE 0 - 10 |
Mt. Baker | Elevation |
---|---|
Monday Morning | SSW 35 - 45 |
Monday Afternoon | W 15 - 25 |
Monday Evening | WNW 5 - 15 |
Monday Night | W 0 - 10 |
Tuesday Morning | VAR 0 - 10 |
Tuesday Afternoon | E 0 - 10 |
Stevens and Snoqualmie Pass | Elevation |
---|---|
Monday Morning | WSW 30 - 40 |
Monday Afternoon | W 30 - 40 |
Monday Evening | NW 15 - 25 |
Monday Night | NW 10 - 20 |
Tuesday Morning | WNW 5 - 15 |
Tuesday Afternoon | ESE 5 - 15 |
Mt. Rainier | Elevation |
---|---|
Monday Morning | WSW 30 - 40 |
Monday Afternoon | W 25 - 35 |
Monday Evening | NW 10 - 20 |
Monday Night | NW 5 - 15 |
Tuesday Morning | VAR 0 - 10 |
Tuesday Afternoon | E 0 - 10 |
Mt. Hood | Elevation |
---|---|
Monday Morning | WSW 30 - 40 |
Monday Afternoon | W 30 - 40 |
Monday Evening | WNW 20 - 30 |
Monday Night | NW 10 - 20 |
Tuesday Morning | VAR 0 - 10 |
Tuesday Afternoon | ESE 5 - 15 |
Hurricane Ridge | Direction - Speed |
---|---|
Monday Morning | W 30 - 40 |
Monday Afternoon | W 20 - 30 |
Monday Evening | WNW 10 - 20 |
Monday Night | W 5 - 15 |
Tuesday Morning | NW 0 - 10 |
Tuesday Afternoon | NE 0 - 10 |
Mt. Baker | Direction - Speed |
---|---|
Monday Morning | SSW 35 - 45 |
Monday Afternoon | W 15 - 25 |
Monday Evening | WNW 5 - 15 |
Monday Night | W 0 - 10 |
Tuesday Morning | VAR 0 - 10 |
Tuesday Afternoon | E 0 - 10 |
Stevens and Snoqualmie Pass | Direction - Speed |
---|---|
Monday Morning | WSW 30 - 40 |
Monday Afternoon | W 30 - 40 |
Monday Evening | NW 15 - 25 |
Monday Night | NW 10 - 20 |
Tuesday Morning | WNW 5 - 15 |
Tuesday Afternoon | ESE 5 - 15 |
Mt. Rainier | Direction - Speed |
---|---|
Monday Morning | WSW 30 - 40 |
Monday Afternoon | W 25 - 35 |
Monday Evening | NW 10 - 20 |
Monday Night | NW 5 - 15 |
Tuesday Morning | VAR 0 - 10 |
Tuesday Afternoon | E 0 - 10 |
Mt. Hood | Direction - Speed |
---|---|
Monday Morning | WSW 30 - 40 |
Monday Afternoon | W 30 - 40 |
Monday Evening | WNW 20 - 30 |
Monday Night | NW 10 - 20 |
Tuesday Morning | VAR 0 - 10 |
Tuesday Afternoon | ESE 5 - 15 |
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 Morning | SW 35 - 45 | SW 40 - 50 | WSW 45 - 60 | WSW 45 - 60 | W 45 - 60 |
Monday Afternoon | W 30 - 40 | W 45 - 60 | W 45 - 60 | W 45 - 60 | W 45 - 60 |
Monday Evening | NW 20 - 30 | NW 30 - 40 | NW 40 - 50 | NW 40 - 50 | NW 40 - 50 |
Monday Night | NW 15 - 25 | NW 10 - 20 | NW 20 - 30 | NW 15 - 25 | NW 20 - 30 |
Tuesday Morning | NW 10 - 20 | NW 5 - 15 | NW 15 - 25 | NW 10 - 20 | NW 10 - 20 |
Tuesday Afternoon | NE 5 - 15 | NE 10 - 20 | ENE 5 - 15 | ENE 5 - 15 | E 0 - 10 |
Mt. Baker | Direction - Speed |
---|---|
Monday Morning | SW 35 - 45 |
Monday Afternoon | W 30 - 40 |
Monday Evening | NW 20 - 30 |
Monday Night | NW 15 - 25 |
Tuesday Morning | NW 10 - 20 |
Tuesday Afternoon | NE 5 - 15 |
Washington Pass | Direction - Speed |
---|---|
Monday Morning | SW 40 - 50 |
Monday Afternoon | W 45 - 60 |
Monday Evening | NW 30 - 40 |
Monday Night | NW 10 - 20 |
Tuesday Morning | NW 5 - 15 |
Tuesday Afternoon | NE 10 - 20 |
Stevens and Snoqualmie Pass | Direction - Speed |
---|---|
Monday Morning | WSW 45 - 60 |
Monday Afternoon | W 45 - 60 |
Monday Evening | NW 40 - 50 |
Monday Night | NW 20 - 30 |
Tuesday Morning | NW 15 - 25 |
Tuesday Afternoon | ENE 5 - 15 |
Mt. Rainier | Direction - Speed |
---|---|
Monday Morning | WSW 45 - 60 |
Monday Afternoon | W 45 - 60 |
Monday Evening | NW 40 - 50 |
Monday Night | NW 15 - 25 |
Tuesday Morning | NW 10 - 20 |
Tuesday Afternoon | ENE 5 - 15 |
Mt. Hood | Direction - Speed |
---|---|
Monday Morning | W 45 - 60 |
Monday Afternoon | W 45 - 60 |
Monday Evening | NW 40 - 50 |
Monday Night | NW 20 - 30 |
Tuesday Morning | NW 10 - 20 |
Tuesday Afternoon | E 0 - 10 |
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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Nov 29, 2020
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