Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Friday night through Monday
A negatively tilted frontal band extending from a low pressure in the Gulf of Alaska continues to slowly approach the Cascades this afternoon. Precipitation has reached the Olympics and Mt. Hood at 2 pm.
The front will weaken as it passes through the Cascades this evening with pretty unimpressive precipitation totals expected overnight. Showers should diminish quickly after midnight. The one exception will the Mt. Baker area where a modest half inch of water or so is expected overnight in post-frontal showers. Generally light snowfall accumulations are expected above 4000-4500 ft. The front will usher in much cooler air and we should see widespread temperatures below freezing for the first time in over a week.
Weak longwave troughing will remain over the area Saturday along with onshore (westerly flow) at the surface. This should translate to slowly building cumulus in the afternoon with a chance of showers mainly for the Cascade Passes, west slopes and Olympics and a bit more sun for the east slopes of the Cascades.
The longwave trough passes inland on Sunday. This should again allow for an afternoon increase in cloud cover with daytime heating with the best chance for showers closer to the trough over the Washington Pass area. Freezing levels will rebound somewhat on Sunday.
Weather Forecast
Hurricane Ridge
| Friday Night | Cloudy with light rain and snow showers in the evening decreasing after midnight. Cooling trend. |
| Saturday | Partly sunny in the morning becoming mostly cloudy in the afternoon. Chance of afternoon light rain and snow showers. |
Mt. Baker
| Friday Night | Cloudy with light to moderate rain and snow showers in the evening decreasing after midnight. Winds also decreasing overnight. Cooling trend. |
| Saturday | Mostly cloudy with light scattered rain and snow showers mainly in the afternoon. |
Washington Pass and Leavenworth
| Friday Night | Cloudy with scattered light rain and snow showers in the evening, becoming mostly cloudy after midnight. |
| Saturday | Partly sunny in the morning becoming mostly cloudy in the afternoon. Slight chance of afternoon mountain showers. |
Stevens and Snoqualmie Pass
| Friday Night | Cloudy with light rain and snow showers in the evening, becoming mostly cloudy with scattered showers after midnight. Light to moderate west wind in the Passes. |
| Saturday | Partly sunny in the morning becoming mostly cloudy in the afternoon. Chance of afternoon showers. Light west wind in the Passes. |
Mt. Rainier, Crystal and White Pass
| Friday Night | Cloudy with light rain and snow showers in the evening, becoming mostly cloudy with scattered showers after midnight. |
| Saturday | Partly sunny in the morning becoming mostly cloudy in the afternoon. Chance of afternoon showers. |
Mt. Hood
| Friday Night | Cloudy with light rain and snow showers in the evening, becoming mostly cloudy with scattered showers after midnight. |
| Saturday | Mostly cloudy with light scattered rain and snow showers. |
Issued: 2:30 PM PDT Friday, March 22, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Evening | Snow Level | 4000' | 5000' | 6000' | 6000' | 5000' | 5000' | 4500' | 4500' |
| Friday Night | Snow Level | 4000' | 4000' | 4000' | 4000' | 4000' | 4000' | 4000' | 4000' |
| Saturday Morning | Snow Level | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' |
| Saturday Afternoon | Snow Level | 4000' | 4500' | 5000' | 5000' | 4500' | 4500' | 4500' | 4500' |
| Saturday Evening | Snow Level | 4000' | 4000' | 4000' | 4000' | 4000' | 4000' | 4000' | 4000' |
| Saturday Night | Snow Level | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' | 3500' |
| Sunday Morning | Freezing Level | 4500' | 4500' | 4500' | 4500' | 4500' | 4500' | 4500' | 4500' |
| Sunday Afternoon | Freezing Level | 5000' | 5500' | 6000' | 6000' | 6000' | 6000' | 6500' | 6500' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening |
Snow Level 4000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 4000' |
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 5000' |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening |
Snow Level 5000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 5500' |
| Washington Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 6000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 6000' |
| Leavenworth | Elevation |
|---|---|
| Friday Evening |
Snow Level 6000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 5000' |
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 6000' |
| Stevens Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 5000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 6000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening |
Snow Level 5000' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 6000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Evening |
Snow Level 4500' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 6500' |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening |
Snow Level 4500' |
| Friday Night |
Snow Level 4000' |
| Saturday Morning |
Snow Level 3500' |
| Saturday Afternoon |
Snow Level 4500' |
| Saturday Evening |
Snow Level 4000' |
| Saturday Night |
Snow Level 3500' |
| Sunday Morning |
Freezing Level 4500' |
| Sunday Afternoon |
Freezing Level 6500' |
* 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
| Friday Night | Monday | Monday Night | Monday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | LT 0.10 | LT 0.10 | LT 0.10 | 0 |
| Mt Baker Ski Area | 0.50 | LT 0.10 | LT 0.10 | 0 |
| Washington Pass | LT 0.10 | 0 | LT 0.10 | LT 0.10 |
| Leavenworth | LT 0.10 | 0 | 0 | 0 |
| Stevens Pass | LT 0.10 | LT 0.10 | LT 0.10 | 0 |
| Snoqualmie Pass | LT 0.25 | LT 0.10 | LT 0.10 | 0 |
| Mission Ridge | LT 0.10 | 0 | 0 | 0 |
| Crystal Mt | LT 0.10 | LT 0.10 | LT 0.10 | 0 |
| Paradise | 0.25 | LT 0.10 | LT 0.10 | 0 |
| White Pass | LT 0.10 | LT 0.10 | LT 0.10 | 0 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 | LT 0.10 | 0 |
| Timberline | LT 0.25 | LT 0.10 | LT 0.10 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Friday Night | 0.50 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | LT 0.10 |
| Monday | LT 0.10 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Friday Night | 0.25 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.10 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Monday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Friday Night | LT 0.25 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| 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: 2:30 PM PDT Friday, March 22, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Evening | SW 10 - 20 | SSW 15 - 30 | WSW 15 - 25 | SW 10 - 20 | SW 10 - 20 |
| Friday Night | SW 5 - 15 | SW 5 - 15 | WSW 5 - 15 | SW 5 - 15 | SW 10 - 20 |
| Saturday Morning | S 0 - 10 | S 0 - 10 | SW 0 - 10 | SW 0 - 10 | SW 5 - 15 |
| Saturday Afternoon | S 0 - 10 | SW 0 - 10 | SW 0 - 10 | SW 0 - 10 | W 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | S 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Friday Evening | SSW 15 - 30 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Evening | WSW 15 - 25 |
| Friday Night | WSW 5 - 15 |
| Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | SW 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | SW 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | W 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | S 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SSW 15 - 30 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | SW 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | WSW 15 - 25 |
| Friday Night | WSW 5 - 15 |
| Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | SW 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | SW 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | W 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 | |
|---|---|---|---|---|---|
| Friday Evening | SSW 20 - 30 | SW 5 - 15 | SW 10 - 20 | SW 10 - 20 | SW 20 - 30 |
| Friday Night | SW 10 - 20 | SW 5 - 15 | SW 15 - 25 | SW 15 - 25 | SW 15 - 25 |
| Saturday Morning | SW 0 - 10 | S 0 - 10 | SW 5 - 15 | SW 5 - 15 | SW 10 - 20 |
| Saturday Afternoon | S 0 - 10 | S 0 - 10 | SW 0 - 10 | SW 0 - 10 | SW 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Evening | SSW 20 - 30 |
| Friday Night | SW 10 - 20 |
| Saturday Morning | SW 0 - 10 |
| Saturday Afternoon | S 0 - 10 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Evening | SW 5 - 15 |
| Friday Night | SW 5 - 15 |
| Saturday Morning | S 0 - 10 |
| Saturday Afternoon | S 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 15 - 25 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | SW 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Evening | SW 10 - 20 |
| Friday Night | SW 15 - 25 |
| Saturday Morning | SW 5 - 15 |
| Saturday Afternoon | SW 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Evening | SW 20 - 30 |
| Friday Night | SW 15 - 25 |
| Saturday Morning | SW 10 - 20 |
| Saturday Afternoon | SW 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: 2:30 PM PDT Friday, March 22, 2019
Extended Weather Synopsis for Monday night through Monday
After a dry Sunday night, a stacked and closed upper low well offshore will rotate a frontal band up from the south spreading light to moderate precipitation over the area Monday afternoon. The European model has consistently shown slower timing, with the bulk of the precipitation not arriving until late afternoon or evening. Leftover showers will diminish Monday night. Weak upper level troughing over the area on Tuesday will allow for scattered showers and a fair bit of cloud cover.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Sunday Night | Freezing Level | 4000' - 5000' | 4000' - 5000' | 5500' - 6500' | |
| Monday | Snow Level | 4000' - 5000' | 4000' - 5000' | 3500' - 4500' | |
| Monday Night | Snow Level | 2500' - 3500' | 2500' - 3500' | 2500' - 3500' | |
| Tuesday | Snow Level | 3000' - 4000' | 3500' - 4500' | 4000' - 5000' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Night |
Freezing Level 4000' - 5000' |
| Monday |
Snow Level 4000' - 5000' |
| Monday Night |
Snow Level 2500' - 3500' |
| Tuesday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Night |
Freezing Level 4000' - 5000' |
| Monday |
Snow Level 4000' - 5000' |
| Monday Night |
Snow Level 2500' - 3500' |
| Tuesday |
Snow Level 3500' - 4500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Night |
Freezing Level 5500' - 6500' |
| Monday |
Snow Level 3500' - 4500' |
| Monday Night |
Snow Level 2500' - 3500' |
| Tuesday |
Snow Level 4000' - 5000' |
* 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 22, 2019
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