Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Sunday & Friday
A shallow trough sits over the Pacific Northwest following the passage of a rapidly moving front leaving the region under post-frontal flow on Sunday. Post-frontal snow showers will gradually decrease from Sunday afternoon through Sunday night. In Washington state, they become very light on Monday and generally ending as winds become light.
A zonal jetstream on Sunday aimed for Southern Oregon will enhance winds in the Mt. Hood area Sunday and Sunday night before spawning a rapidly-moving cutoff low that drops SE toward northern California on Monday and Monday evening. The Mt. Hood will be at the northern end of the closed low's precipitation shield on Monday and moderate and gusty winds will shift to the east on Monday afternoon as flow wrap around the low. Any chance of snow showers will end Monday monday night on Mt. Hood.
Tuesday, a shortwave ridge offshore works into the region in advance of the system dropping SE and slated to impact the region on Wednesday.
Weather Forecast
Hurricane Ridge
| Sunday | Light snow showers decreasing in the afternoon. Moderate winds. |
Mt. Baker
| Sunday | Moderate to heavy snow showers in the morning becoming light in the afternoon, with the possibility of a heavier convergence zone forming (likely just south of Mt. Baker). Moderate winds. |
Washington Pass and Leavenworth
| Sunday | Decreasing light snow showers. Light to moderate winds. |
Stevens and Snoqualmie Pass
| Sunday | Moderate snow showers. Moderate winds. Easterly flow decreasing and ending in the morning, then becoming westerly in the afternoon. Chance of snow showers mixing with rain at Snoqualmie mainly from late morning into the afternoon. |
Mt. Rainier, Crystal and White Pass
| Sunday | Snow showers increasing over the morning hours and becoming moderate to heavy at Paradise, light at Crystal, and moderate at White Pass. Moderate winds. |
Mt. Hood
| Sunday | Moderate snow showers. Moderate winds with strong gusts. |
Issued: 6:22 AM PST Sunday, December 23, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Morning | Snow Level * | 3500' | 2000' | 1000' | 500' | 1500' | 2000' | 3000' | 4000' |
| Sunday Afternoon | Snow Level | 3000' | 2500' | 1500' | 2000' | 2500' | 3000' | 3500' | 4000' |
| Sunday Evening | Snow Level | 3000' | 2500' | 2000' | 2500' | 3000' | 3000' | 3000' | 4000' |
| Sunday Night | Snow Level | 3000' | 2000' | 1000' | 2000' | 3000' | 3000' | 2500' | 3500' |
| Monday Morning | Snow Level | 2500' | 1500' | 500' | 1500' | 2500' | 2500' | 2000' | 3000' |
| Monday Afternoon | Snow Level | 3000' | 2500' | 2000' | 2000' | 2500' | 3000' | 3500' | 3500' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning |
Snow Level 3500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 3000' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 1500' |
| Monday Afternoon |
Snow Level 2500' |
| Washington Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 1500' |
| Sunday Evening |
Snow Level 2000' |
| Sunday Night |
Snow Level 1000' |
| Monday Morning |
Snow Level 500' |
| Monday Afternoon |
Snow Level 2000' |
| Leavenworth | Elevation |
|---|---|
| Sunday Morning |
Snow Level 500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2000' |
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 1500' |
| Monday Afternoon |
Snow Level 2000' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 1500' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 2500' |
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 3000' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 2500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning |
Snow Level 2000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3000' |
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 3000' |
| Monday Morning |
Snow Level 2500' |
| Monday Afternoon |
Snow Level 3000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Morning |
Snow Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 3500' |
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 3500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning |
Snow Level 4000' (Easterly Flow *) |
| Sunday Afternoon |
Snow Level 4000' |
| Sunday Evening |
Snow Level 4000' |
| Sunday Night |
Snow Level 3500' |
| Monday Morning |
Snow Level 3000' |
| Monday Afternoon |
Snow Level 3500' |
* 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
| Sunday | Sunday Night | Friday | |
|---|---|---|---|
| 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0.25 | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | 0.75 | LT 0.25 | LT 0.10 |
| Washington Pass | 0.25 | LT 0.10 | LT 0.10 |
| Leavenworth | LT 0.25 | 0 | 0 |
| Stevens Pass | 0.50 - 0.75 | 0.25 - 0.50 | LT 0.25 |
| Snoqualmie Pass | 0.75 | 0.25 | 0 |
| Mission Ridge | LT 0.25 | LT 0.10 | 0 |
| Crystal Mt | 0.50 | LT 0.25 | 0 |
| Paradise | 1.00 | 0.50 | LT 0.10 |
| White Pass | 0.50 - 0.75 | 0.25 | LT 0.10 |
| Mt Hood Meadows | 0.75 -1.00 | 0.50 - 0.75 | LT 0.25 |
| Timberline | 1.00 | 0.75 | LT 0.25 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Sunday | 0.25 |
| Sunday Night | LT 0.10 |
| Friday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday | 0.75 |
| Sunday Night | LT 0.25 |
| Friday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday | 0.25 |
| Sunday Night | LT 0.10 |
| Friday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday | LT 0.25 |
| Sunday Night | 0 |
| Friday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday | 0.50 - 0.75 |
| Sunday Night | 0.25 - 0.50 |
| Friday | LT 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday | 0.75 |
| Sunday Night | 0.25 |
| Friday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday | LT 0.25 |
| Sunday Night | LT 0.10 |
| Friday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday | 0.50 |
| Sunday Night | LT 0.25 |
| Friday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday | 1.00 |
| Sunday Night | 0.50 |
| Friday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday | 0.50 - 0.75 |
| Sunday Night | 0.25 |
| Friday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday | 0.75 -1.00 |
| Sunday Night | 0.50 - 0.75 |
| Friday | LT 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday | 1.00 |
| Sunday Night | 0.75 |
| Friday | LT 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: 6:22 AM PST Sunday, December 23, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Morning | SW 10 - 20 | SW 10 - 20 | SSW 15 - 25 | S 15 - 25 | WSW 30 - 45 |
| Sunday Afternoon | WSW 10 - 20 | SW 10 - 20 | WSW 10 - 20 | WSW 10 - 20 | WSW 30 - 45 |
| Sunday Evening | SW 5 - 15 | SSW 5 - 15 | WSW 10 - 20 | SW 10 - 20 | WSW 25 - 35 |
| Sunday Night | SW 0 - 10 | SSW 5 - 15 | W 10 - 20 | WSW 5 - 15 | WSW 15 - 25 |
| Monday Morning | E 0 - 10 | S 0 - 10 | W 0 - 10 | VAR 0 - 10 | W 5 - 15 |
| Monday Afternoon | E 5 - 15 | NE 5 - 15 | E 5 - 15 | E 5 - 15 | E 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | WSW 10 - 20 |
| Sunday Evening | SW 5 - 15 |
| Sunday Night | SW 0 - 10 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | E 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | SW 10 - 20 |
| Sunday Evening | SSW 5 - 15 |
| Sunday Night | SSW 5 - 15 |
| Monday Morning | S 0 - 10 |
| Monday Afternoon | NE 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Morning | SSW 15 - 25 |
| Sunday Afternoon | WSW 10 - 20 |
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | W 10 - 20 |
| Monday Morning | W 0 - 10 |
| Monday Afternoon | E 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Morning | S 15 - 25 |
| Sunday Afternoon | WSW 10 - 20 |
| Sunday Evening | SW 10 - 20 |
| Sunday Night | WSW 5 - 15 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | E 5 - 15 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Morning | WSW 30 - 45 |
| Sunday Afternoon | WSW 30 - 45 |
| Sunday Evening | WSW 25 - 35 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | W 5 - 15 |
| Monday Afternoon | E 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | WSW 10 - 20 |
| Sunday Evening | SW 5 - 15 |
| Sunday Night | SW 0 - 10 |
| Monday Morning | E 0 - 10 |
| Monday Afternoon | E 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SW 10 - 20 |
| Sunday Afternoon | SW 10 - 20 |
| Sunday Evening | SSW 5 - 15 |
| Sunday Night | SSW 5 - 15 |
| Monday Morning | S 0 - 10 |
| Monday Afternoon | NE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | SSW 15 - 25 |
| Sunday Afternoon | WSW 10 - 20 |
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | W 10 - 20 |
| Monday Morning | W 0 - 10 |
| Monday Afternoon | E 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | S 15 - 25 |
| Sunday Afternoon | WSW 10 - 20 |
| Sunday Evening | SW 10 - 20 |
| Sunday Night | WSW 5 - 15 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | E 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | WSW 30 - 45 |
| Sunday Afternoon | WSW 30 - 45 |
| Sunday Evening | WSW 25 - 35 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | W 5 - 15 |
| Monday Afternoon | E 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 | |
|---|---|---|---|---|---|
| Sunday Morning | SW 20 - 30 | SW 25 - 35 | WSW 30 - 45 | WSW 40 - 60 | WSW 50 - 70 |
| Sunday Afternoon | WSW 15 - 25 | WSW 15 - 25 | WSW 30 - 45 | WSW 30 - 45 | WSW 50 - 70 |
| Sunday Evening | WSW 15 - 25 | WSW 15 - 25 | W 20 - 30 | W 25 - 35 | WSW 45 - 65 |
| Sunday Night | WSW 15 - 25 | WSW 20 - 30 | W 20 - 30 | W 20 - 30 | WSW 35 - 50 |
| Monday Morning | WSW 10 - 20 | WSW 10 - 20 | W 10 - 20 | WSW 10 - 20 | WSW 20 - 30 |
| Monday Afternoon | W 5 - 15 | W 0 - 10 | S 0 - 10 | SE 5 - 15 | SE 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Morning | SW 20 - 30 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Evening | WSW 15 - 25 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | W 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Morning | SW 25 - 35 |
| Sunday Afternoon | WSW 15 - 25 |
| Sunday Evening | WSW 15 - 25 |
| Sunday Night | WSW 20 - 30 |
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | W 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Morning | WSW 30 - 45 |
| Sunday Afternoon | WSW 30 - 45 |
| Sunday Evening | W 20 - 30 |
| Sunday Night | W 20 - 30 |
| Monday Morning | W 10 - 20 |
| Monday Afternoon | S 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Morning | WSW 40 - 60 |
| Sunday Afternoon | WSW 30 - 45 |
| Sunday Evening | W 25 - 35 |
| Sunday Night | W 20 - 30 |
| Monday Morning | WSW 10 - 20 |
| Monday Afternoon | SE 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Morning | WSW 50 - 70 |
| Sunday Afternoon | WSW 50 - 70 |
| Sunday Evening | WSW 45 - 65 |
| Sunday Night | WSW 35 - 50 |
| Monday Morning | WSW 20 - 30 |
| Monday Afternoon | SE 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.
Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Dec 22, 2018
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