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 Monday
A ridge of high pressure should dominate this week.
The closed low off the coast of California continues to spin southward leaving our region with sunny weather and warmer air under an offshore ridge wedging in from the NW. We've seen a drastic change in temperature over the last 24 hours with many locations warming 20-30 degrees. By Monday afternoon, temperatures were generally in the 30's and 40's at NWAC stations, with a few stations above 6000 ft still in the 20's. Temperatures were generally warmest west of the Cascade Crest.
Some ENE winds associated with the closed low should linger into Monday evening for Mt Hood, but by Tuesday morning, light or calm winds are expected across the region.
Dry northerly flow downstream of the strong offshore ridge brings a weak disturbance passing off our coast. The disturbance lacks precipitation, but brings mid-level clouds to the region during the day on Tuesday and should help limit solar radiation hitting the snowpack for the Washington Cascades and Olympics. Temperatures cool 5 degrees or so for areas west of the Cascade Crest relative to Monday.
Tuesday night the ridge wedges back in as skies clear. Temperatures won't be as warm as during the Monday-Tuesday time frame, but still expect mild, sunny conditions on Wednesday.
Weather Forecast
Hurricane Ridge
| Monday Night | Clear and mild with very light winds. |
| Tuesday | Increasing clouds early, then mostly cloudy from late morning onwards. |
Mt. Baker
| Monday Night | Clear and mild with very light winds. |
| Tuesday | Warm with mid-level clouds increasing early in the day and decreasing by late afternoon. |
Washington Pass and Leavenworth
| Monday Night | Clear with an inversion likely bringing mild temperatures at mid and upper elevations. |
| Tuesday | Sunny to start the day, then thin mid-level clouds passing over the region from mid-morning onwards. Mild with the inversion mixing out by mid-morning. |
Stevens and Snoqualmie Pass
| Monday Night | Clear and mild with very light winds. |
| Tuesday | Sunny to start the day, then thin mid-level clouds passing over the region from mid-morning onwards. Mild with the inversion mixing out by mid-morning. |
Mt. Rainier, Crystal and White Pass
| Monday Night | Clear and mild with very light winds. |
| Tuesday | Sunny to start the day, then thin mid-level clouds passing over the region from late-morning onwards. Mild with any overnight inversion mixing out by mid-morning. |
Mt. Hood
| Monday Night | Clear skies with moderate 5000 ft winds becoming light. |
| Tuesday | Warm with mostly clear skies in the morning and with partial mid-level cloud coverage in the afternoon. |
Issued: 2:19 PM PDT Monday, March 16, 2020
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 | 8000' | 7000' | 6000' | 6000' | 6500' | 7000' | 7000' | 4500' |
| Monday Night | Freezing Level | 8000' | 6000' | 4500' | 4000' | 4500' | 6000' | 5500' | 4000' |
| Tuesday Morning | Freezing Level | 7500' | 5000' | 4500' | 4500' | 5000' | 5000' | 5500' | 5500' |
| Tuesday Afternoon | Freezing Level | 6500' | 6500' | 6000' | 5000' | 6000' | 6500' | 7000' | 6500' |
| Tuesday Evening | Freezing Level | 5500' | 5500' | 5500' | 5000' | 5500' | 5500' | 5500' | 5500' |
| Tuesday Night | Freezing Level | 4500' | 4000' | 4000' | 4000' | 4000' | 4000' | 4500' | 4000' |
| Wednesday Morning | Freezing Level | 4500' | 4000' | 4000' | 4000' | 4500' | 4500' | 4500' | 4000' |
| Wednesday Afternoon | Freezing Level | 5000' | 5000' | 5500' | 5000' | 5000' | 4500' | 5000' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Freezing Level 8000' |
| Monday Night |
Freezing Level 8000' |
| Tuesday Morning |
Freezing Level 7500' |
| Tuesday Afternoon |
Freezing Level 6500' |
| Tuesday Evening |
Freezing Level 5500' |
| Tuesday Night |
Freezing Level 4500' |
| Wednesday Morning |
Freezing Level 4500' |
| Wednesday Afternoon |
Freezing Level 5000' |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Freezing Level 7000' |
| Monday Night |
Freezing Level 6000' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Freezing Level 6500' |
| Tuesday Evening |
Freezing Level 5500' |
| Tuesday Night |
Freezing Level 4000' |
| Wednesday Morning |
Freezing Level 4000' |
| Wednesday Afternoon |
Freezing Level 5000' |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 6000' |
| Monday Night |
Freezing Level 4500' |
| Tuesday Morning |
Freezing Level 4500' |
| Tuesday Afternoon |
Freezing Level 6000' |
| Tuesday Evening |
Freezing Level 5500' |
| Tuesday Night |
Freezing Level 4000' |
| Wednesday Morning |
Freezing Level 4000' |
| Wednesday Afternoon |
Freezing Level 5500' |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Freezing Level 6000' |
| Monday Night |
Freezing Level 4000' |
| Tuesday Morning |
Freezing Level 4500' |
| Tuesday Afternoon |
Freezing Level 5000' |
| Tuesday Evening |
Freezing Level 5000' |
| Tuesday Night |
Freezing Level 4000' |
| Wednesday Morning |
Freezing Level 4000' |
| Wednesday Afternoon |
Freezing Level 5000' |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 6500' |
| Monday Night |
Freezing Level 4500' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Freezing Level 6000' |
| Tuesday Evening |
Freezing Level 5500' |
| Tuesday Night |
Freezing Level 4000' |
| Wednesday Morning |
Freezing Level 4500' |
| Wednesday Afternoon |
Freezing Level 5000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 7000' |
| Monday Night |
Freezing Level 6000' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Freezing Level 6500' |
| Tuesday Evening |
Freezing Level 5500' |
| Tuesday Night |
Freezing Level 4000' |
| Wednesday Morning |
Freezing Level 4500' |
| Wednesday Afternoon |
Freezing Level 4500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Freezing Level 7000' |
| Monday Night |
Freezing Level 5500' |
| Tuesday Morning |
Freezing Level 5500' |
| Tuesday Afternoon |
Freezing Level 7000' |
| Tuesday Evening |
Freezing Level 5500' |
| Tuesday Night |
Freezing Level 4500' |
| Wednesday Morning |
Freezing Level 4500' |
| Wednesday Afternoon |
Freezing Level 5000' |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Freezing Level 4500' |
| Monday Night |
Freezing Level 4000' |
| Tuesday Morning |
Freezing Level 5500' |
| Tuesday Afternoon |
Freezing Level 6500' |
| Tuesday Evening |
Freezing Level 5500' |
| Tuesday Night |
Freezing Level 4000' |
| Wednesday Morning |
Freezing Level 4000' |
| Wednesday Afternoon |
Freezing Level 4500' |
* 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 | Monday | Monday Night | Monday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | 0 | 0 | 0 |
| Mt Baker Ski Area | 0 | 0 | 0 | 0 |
| Washington Pass | 0 | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | 0 | 0 |
| Snoqualmie Pass | 0 | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | 0 | 0 | 0 | 0 |
| Paradise | 0 | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | 0 | 0 | 0 |
| Timberline | 0 | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 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: 2:19 PM PDT Monday, March 16, 2020
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | NW 0 - 10 | VAR 0 - 10 | E 0 - 10 | ENE 0 - 10 | ENE 15 - 25 |
| Monday Night | VAR 0 - 10 | SW 0 - 10 | ESE 0 - 10 | VAR 0 - 10 | ENE 5 - 15 |
| Tuesday Morning | SSE 0 - 10 | VAR 0 - 10 | SE 0 - 10 | VAR 0 - 10 | VAR 0 - 10 |
| Tuesday Afternoon | SSE 0 - 10 | ENE 0 - 10 | SE 0 - 10 | SW 0 - 10 | NW 0 - 10 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | NW 0 - 10 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | SSE 0 - 10 |
| Tuesday Afternoon | SSE 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | VAR 0 - 10 |
| Monday Night | SW 0 - 10 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | ENE 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | E 0 - 10 |
| Monday Night | ESE 0 - 10 |
| Tuesday Morning | SE 0 - 10 |
| Tuesday Afternoon | SE 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | ENE 0 - 10 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | SW 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | ENE 15 - 25 |
| Monday Night | ENE 5 - 15 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | NW 0 - 10 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | NW 0 - 10 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | SSE 0 - 10 |
| Tuesday Afternoon | SSE 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | VAR 0 - 10 |
| Monday Night | SW 0 - 10 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | ENE 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | E 0 - 10 |
| Monday Night | ESE 0 - 10 |
| Tuesday Morning | SE 0 - 10 |
| Tuesday Afternoon | SE 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | ENE 0 - 10 |
| Monday Night | VAR 0 - 10 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | SW 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | ENE 15 - 25 |
| Monday Night | ENE 5 - 15 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | NW 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | NW 5 - 15 | NNW 5 - 15 | WNW 5 - 15 | ENE 5 - 15 | ENE 20 - 30 |
| Monday Night | W 10 - 20 | W 5 - 15 | NW 10 - 20 | NW 10 - 20 | NE 10 - 20 |
| Tuesday Morning | VAR 0 - 10 | ESE 0 - 10 | NW 0 - 10 | VAR 0 - 10 | NNW 5 - 15 |
| Tuesday Afternoon | E 5 - 15 | ESE 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | WNW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | NW 5 - 15 |
| Monday Night | W 10 - 20 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | E 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | NNW 5 - 15 |
| Monday Night | W 5 - 15 |
| Tuesday Morning | ESE 0 - 10 |
| Tuesday Afternoon | ESE 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | WNW 5 - 15 |
| Monday Night | NW 10 - 20 |
| Tuesday Morning | NW 0 - 10 |
| Tuesday Afternoon | VAR 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | ENE 5 - 15 |
| Monday Night | NW 10 - 20 |
| Tuesday Morning | VAR 0 - 10 |
| Tuesday Afternoon | VAR 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | ENE 20 - 30 |
| Monday Night | NE 10 - 20 |
| Tuesday Morning | NNW 5 - 15 |
| Tuesday Afternoon | WNW 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.
Issued: 2:19 PM PDT Monday, March 16, 2020
Extended Weather Synopsis for Monday night through Monday
Wednesday night into Thursday the offshore high pressure continues to bring mild weather with 3500-5000 ft snow levels. Late in the day on Thursday, expect some clouds to increase as a moderately organized offshore low approaches our near-shore waters from the north. The low continues southward and may provide some clouds or a chance of rain/snow showers, but models increasingly take this system further offshore, limiting our chances of precipitation.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Freezing Level | 4000' - 5000' | 3500' - 5000' | 3500' - 5000' | |
| Thursday | Freezing Level | 4000' - 5000' | 3500' - 5000' | 4000' - 5500' | |
| Thursday Night | Freezing Level | 3000' - 4000' | 3500' - 4500' | 4000' - 5000' | * |
| Friday | Freezing Level | 3000' - 4000' | 3000' - 4000' | 3500' - 4500' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 4000' - 5000' |
| Thursday |
Freezing Level 4000' - 5000' |
| Thursday Night |
Freezing Level 3000' - 4000' (Easterly Flow *) |
| Friday |
Freezing Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 3500' - 5000' |
| Thursday |
Freezing Level 3500' - 5000' |
| Thursday Night |
Freezing Level 3500' - 4500' (Easterly Flow *) |
| Friday |
Freezing Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 3500' - 5000' |
| Thursday |
Freezing Level 4000' - 5500' |
| Thursday Night |
Freezing Level 4000' - 5000' (Easterly Flow *) |
| Friday |
Freezing Level 3500' - 4500' |
* 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 Mar 16, 2020
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