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 Tuesday
A quick moving weather system in NW flow aloft will quickly approach the region tonight, with light snow developing early Tuesday morning for Olympics and north/central WA Cascades. This system looks to arrive slightly faster than previous model runs indicated, so snowfall rates may approach moderate during the afternoon for areas north of Snoqualmie Pass.
Snowfall should quickly ramp up through the evening for all areas before the upper trough passes inland and digs over central Oregon turning steady snow to showers. A subtle warming trend should peak through the late evening for areas near and just south of a weak surface low, roughly from Stevens Pass and south.
NW flow later Tuesday night through Wednesday morning will provide some orographic enhancement to ramp up snow shower totals along the west slopes of the Cascades and Mt. Hood as well as ridge-crest westerly winds. The low level post-frontal flow looks favorable for dual convergence zones; one downwind of Vancouver Island and one off of the Olympics aimed more into the Crystal-Rainier area. 1-2 feet of snow through Wednesday looks plausible for the aforementioned areas. Showers will decrease Wednesday afternoon for the Washington Cascades as the flow turns more northerly.
Weather Forecast
Hurricane Ridge
| Monday Night | Partly to mostly cloudy in the evening, becoming overcast with light snow developing late. |
| Tuesday | Light snow, possibly becoming light to moderate in the afternoon. Increasing west winds. |
Mt. Baker
| Monday Night | Mostly cloudy in the evening, becoming overcast with light snow developing late. |
| Tuesday | Light snow, possibly becoming light to moderate in the afternoon. |
Washington Pass and Leavenworth
| Monday Night | Mostly cloudy in the evening, becoming overcast overnight. |
| Tuesday | Periods of light snow. |
Stevens and Snoqualmie Pass
| Monday Night | Mostly cloudy in the evening, becoming overcast with light snow developing late. Light west wind in the Passes. |
| Tuesday | Light snow, possibly becoming light to moderate in the afternoon. Light to moderate west wind in the Passes. |
Mt. Rainier, Crystal and White Pass
| Monday Night | Mostly cloudy in the evening, becoming overcast overnight. |
| Tuesday | Cloudy with light snow developing in the morning. |
Mt. Hood
| Monday Night | Mostly cloudy in the evening, becoming overcast overnight. |
| Tuesday | Cloudy with light snow developing in the morning. Increasing W-NW winds. |
Issued: 1:59 PM PST Monday, February 18, 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 | Freezing Level | 2000' | 1000' | 1000' | 1000' | 1500' | 1500' | 2000' | 2000' |
| Monday Night | Freezing Level | 1000' | 0' | 0' | 0' | 500' | 500' | 1000' | 1000' |
| Tuesday Morning | Snow Level | 500' | 0' | 0' | 0' | 500' | 500' | 500' | 1000' |
| Tuesday Afternoon | Snow Level | 2000' | 1500' | 1000' | 1000' | 1500' | 1500' | 2000' | 2000' |
| Tuesday Evening | Snow Level | 2500' | 1500' | 1000' | 1000' | 2000' | 2000' | 2500' | 2500' |
| Tuesday Night | Snow Level | 1000' | 1000' | 1000' | 1000' | 1500' | 1500' | 2000' | 2000' |
| Wednesday Morning | Snow Level | 500' | 500' | 500' | 500' | 500' | 500' | 1000' | 1000' |
| Wednesday Afternoon | Snow Level | 1500' | 1500' | 1500' | 1500' | 1500' | 1500' | 1500' | 1500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Freezing Level 1000' |
| Tuesday Morning |
Snow Level 500' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 2500' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Snow Level 1500' |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Freezing Level 1000' |
| Monday Night |
Freezing Level 0' |
| Tuesday Morning |
Snow Level 0' |
| Tuesday Afternoon |
Snow Level 1500' |
| Tuesday Evening |
Snow Level 1500' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Snow Level 1500' |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 1000' |
| Monday Night |
Freezing Level 0' |
| Tuesday Morning |
Snow Level 0' |
| Tuesday Afternoon |
Snow Level 1000' |
| Tuesday Evening |
Snow Level 1000' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Snow Level 1500' |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Freezing Level 1000' |
| Monday Night |
Freezing Level 0' |
| Tuesday Morning |
Snow Level 0' |
| Tuesday Afternoon |
Snow Level 1000' |
| Tuesday Evening |
Snow Level 1000' |
| Tuesday Night |
Snow Level 1000' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Snow Level 1500' |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 1500' |
| Monday Night |
Freezing Level 500' |
| Tuesday Morning |
Snow Level 500' |
| Tuesday Afternoon |
Snow Level 1500' |
| Tuesday Evening |
Snow Level 2000' |
| Tuesday Night |
Snow Level 1500' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Snow Level 1500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 1500' |
| Monday Night |
Freezing Level 500' |
| Tuesday Morning |
Snow Level 500' |
| Tuesday Afternoon |
Snow Level 1500' |
| Tuesday Evening |
Snow Level 2000' |
| Tuesday Night |
Snow Level 1500' |
| Wednesday Morning |
Snow Level 500' |
| Wednesday Afternoon |
Snow Level 1500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Freezing Level 1000' |
| Tuesday Morning |
Snow Level 500' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 2500' |
| Tuesday Night |
Snow Level 2000' |
| Wednesday Morning |
Snow Level 1000' |
| Wednesday Afternoon |
Snow Level 1500' |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Freezing Level 2000' |
| Monday Night |
Freezing Level 1000' |
| Tuesday Morning |
Snow Level 1000' |
| Tuesday Afternoon |
Snow Level 2000' |
| Tuesday Evening |
Snow Level 2500' |
| Tuesday Night |
Snow Level 2000' |
| Wednesday Morning |
Snow Level 1000' |
| Wednesday Afternoon |
Snow Level 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.
Precipitation Forecast
| Monday Night | Tuesday | Tuesday Night | Tuesday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | 0.25 | 0.25 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | 0.25 | 0.25 - 0.50 | LT 0.25 |
| Washington Pass | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Leavenworth | 0 | LT 0.10 | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | 0.25 | 0.75 | 0.25 |
| Snoqualmie Pass | LT 0.10 | 0.25 | 0.75 -1.00 | 0.25 |
| Mission Ridge | 0 | LT 0.10 | LT 0.25 | LT 0.10 |
| Crystal Mt | 0 | LT 0.10 | 0.50 | LT 0.25 |
| Paradise | 0 | 0.25 | 0.75 -1.00 | LT 0.25 |
| White Pass | 0 | LT 0.25 | 0.50 - 0.75 | LT 0.25 |
| Mt Hood Meadows | 0 | LT 0.10 | 0.75 -1.00 | 0.25 |
| Timberline | 0 | LT 0.25 | 1.00 - 1.50 | 0.25 - 0.50 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Tuesday | 0.25 |
| Tuesday Night | 0.25 |
| Tuesday | LT 0.10 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Tuesday | 0.25 |
| Tuesday Night | 0.25 - 0.50 |
| Tuesday | LT 0.25 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | LT 0.10 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | LT 0.10 |
| Tuesday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Tuesday | 0.25 |
| Tuesday Night | 0.75 |
| Tuesday | 0.25 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | LT 0.10 |
| Tuesday | 0.25 |
| Tuesday Night | 0.75 -1.00 |
| Tuesday | 0.25 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | LT 0.10 |
| Tuesday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0.50 |
| Tuesday | LT 0.25 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0.25 |
| Tuesday Night | 0.75 -1.00 |
| Tuesday | LT 0.25 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | LT 0.25 |
| Tuesday Night | 0.50 - 0.75 |
| Tuesday | LT 0.25 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | LT 0.10 |
| Tuesday Night | 0.75 -1.00 |
| Tuesday | 0.25 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | LT 0.25 |
| Tuesday Night | 1.00 - 1.50 |
| Tuesday | 0.25 - 0.50 |
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: 1:59 PM PST Monday, February 18, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | W 0 - 10 | W 0 - 10 | W 5 - 15 | W 0 - 10 | WNW 10 - 20 |
| Monday Night | W 0 - 10 | SW 0 - 10 | W 5 - 15 | W 0 - 10 | W 10 - 20 |
| Tuesday Morning | W 10 - 20 | SW 5 - 15 | W 5 - 15 | W 5 - 15 | W 15 - 25 |
| Tuesday Afternoon | W 15 - 25 | SW 10 - 20 | WSW 10 - 20 | W 10 - 20 | W 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | W 0 - 10 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | W 0 - 10 |
| Monday Night | SW 0 - 10 |
| Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | W 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | WSW 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | W 0 - 10 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | W 10 - 20 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | WNW 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | W 0 - 10 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | W 0 - 10 |
| Monday Night | SW 0 - 10 |
| Tuesday Morning | SW 5 - 15 |
| Tuesday Afternoon | SW 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | W 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | WSW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | W 0 - 10 |
| Monday Night | W 0 - 10 |
| Tuesday Morning | W 5 - 15 |
| Tuesday Afternoon | W 10 - 20 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | WNW 10 - 20 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | W 15 - 25 |
| Tuesday Afternoon | W 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | NW 10 - 20 | NW 20 - 30 | NW 20 - 30 | NW 20 - 30 | NW 20 - 30 |
| Monday Night | WSW 10 - 20 | NW 10 - 20 | NW 25 - 35 | NW 25 - 35 | NW 20 - 30 |
| Tuesday Morning | W 10 - 20 | W 10 - 20 | NW 25 - 35 | NW 20 - 30 | NW 30 - 40 |
| Tuesday Afternoon | W 20 - 30 | W 20 - 30 | WNW 30 - 40 | W 25 - 35 | WNW 30 - 40 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | NW 10 - 20 |
| Monday Night | WSW 10 - 20 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 20 - 30 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 20 - 30 |
| Monday Night | NW 10 - 20 |
| Tuesday Morning | W 10 - 20 |
| Tuesday Afternoon | W 20 - 30 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | NW 20 - 30 |
| Monday Night | NW 25 - 35 |
| Tuesday Morning | NW 25 - 35 |
| Tuesday Afternoon | WNW 30 - 40 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | NW 20 - 30 |
| Monday Night | NW 25 - 35 |
| Tuesday Morning | NW 20 - 30 |
| Tuesday Afternoon | W 25 - 35 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | NW 20 - 30 |
| Monday Night | NW 20 - 30 |
| Tuesday Morning | NW 30 - 40 |
| Tuesday Afternoon | WNW 30 - 40 |
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: 1:59 PM PST Monday, February 18, 2019
Extended Weather Synopsis for Tuesday night through Tuesday
Showers should taper off Wednesday night as shortwave ridging quickly moves toward the area. Thursday and Thursday night should be mostly dry and cool before a very similar looking weather system in NW flow approaches the area on Friday. If the current track and timing hold, light snow should spread to all areas on Friday and increase during the day.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Snow Level | 500' - 1500' | 500' - 1500' | 500' - 1500' | |
| Thursday | Freezing Level | 2000' - 3000' | 2500' - 3500' | 2500' - 3500' | |
| Thursday Night | Freezing Level | 0' - 1000' | 0' - 1000' | 500' - 1500' | |
| Friday | Snow Level | 0' - 1000' | 500' - 1500' | 1000' - 2000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Snow Level 500' - 1500' |
| Thursday |
Freezing Level 2000' - 3000' |
| Thursday Night |
Freezing Level 0' - 1000' |
| Friday |
Snow Level 0' - 1000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Snow Level 500' - 1500' |
| Thursday |
Freezing Level 2500' - 3500' |
| Thursday Night |
Freezing Level 0' - 1000' |
| Friday |
Snow Level 500' - 1500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Snow Level 500' - 1500' |
| Thursday |
Freezing Level 2500' - 3500' |
| Thursday Night |
Freezing Level 500' - 1500' |
| Friday |
Snow Level 1000' - 2000' |
* 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 Feb 18, 2019
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