Jump to: Weather Forecast I Precipitation I Snow Level I 5000' Temps I Ridgeline Winds I Extended Weather
Weather Synopsis
Although the NWAC weather forecast desk is winding down, the weather pattern hasn't received the memo. Some of the coolest temperatures of the spring will accompany unsettled weather into early next week.
A deep trough and associated low pressure center slide down the British Columbia coastline. WSW winds aloft will bring in this period of the most vigorous light to moderate showers rotating into the region ahead of the trough. Expect the heaviest precipitation in convergence shifting from the Skagit in the evening hours into the mountain loop area overnight. Already unseasonably low snow levels on Sunday continue to lower thorugh Sunday night and should be in the 2000-3000 ft range in the north and the 3000-4000 ft range in the south.
The first and coldest lobe of the trough reaches the coast early Monday and crosses the Cascades late morning. As the trough moves onshore, the precipitation eases somewhat for the northern Cascades, but expect a period of moderate to locally heavy snowfall for Mt Hood in the morning hours. Convergence potential shifts slightly further south with the potential targets from the Mountain loop to Snoqualmie Pass. Snow levels should be in the 2000-3500 ft range. With cold air in place, the west slopes of the Cascades can expect up to a 30% chance of a thunderstorm in the mid-day or afternoon hours, with a slight chance further east.
The cold trough continues to bring mostly light showers to the same areas (moderate in Convergence locally in the central Washington Cascades) Monday night with 2500-3000 ft snow levels. On Tuesday the filling final lobe of the trough arrives. Expect most of the scattered (but locally intense) rain and snow shower activity to be south of I-90 with isolated showers further north.
The west slopes of the Cascades can expect 6-18" of low-density snowfall above the rain/snow line by the end of the day on Tuesday with up to 6" east of the Crest. Moderate ridgeline winds focus mostly on the mountain gaps and areas east of the Cascade Crest. These winds should decrease from north to south Sunday night through Monday night.
This April 28th, 2024 product is the final mountain weather forecast of the 2023-24 season. Thanks so much for joining us - from all of us at the weather forecast desk (Robert, Dennis, and Dallas).
Weather Forecast
| Sunday Night | Unseasonably cool with decreasing light rain and snow showers. |
|---|---|
| Monday | Unseasonably cool with scattered to isolated rain and snow showers. |
| Sunday Night | Unseasonably cool with moderate rain and snow showers in the evening becoming light overnight. |
|---|---|
| Monday | Unseasonably cool with light rain and snow showers along with sun breaks at times. |
| Sunday Night | Unseasonably cool with moderate rain and snow showers along with convergence bands. Light to moderate ridgeline winds. |
|---|---|
| Monday | Unseasonably cool with light rain and snow showers that may be locally intense in the mid-day or afternoon hours with a chance of a thunderstorm. Also a chance of convergence at times. |
| Sunday Night | Unseasonably cool with light rain and snow showers (moderate at Paradise). Light to moderate ridgeline winds. |
|---|---|
| Monday | Light rain and snow showers (moderate at times at Paradise). A chance of a thunderstorm in the afternoon. Light to moderate ridgeline winds. |
| Sunday Night | Unseasonably cool with decreasing light to moderate rain and snow showers. Light to moderate ridgeline and light W wind at the Pass. |
|---|---|
| Monday | Unseasonably cool with light rain and snow showers that may be locally intense in the mid-day or afternoon hours with a chance of a thunderstorm. Also a chance of convergence at times. Light ridgeline and W wind at the Pass. |
| Sunday Night | Unseasonably cool with decreasing light to moderate rain and snow showers. Light to moderate ridgeline and light W wind at the Pass. |
|---|---|
| Monday | Unseasonably cool with light rain and snow showers that may be locally intense in the mid-day or afternoon hours with a chance of a thunderstorm. Light to moderate ridgeline and light W wind at the Pass becoming moderate at times in the afternoon. |
| Sunday Night | Unseasonably cool with decreasing light rain and snow showers. Moderate ridgeline winds become light overnight. |
|---|---|
| Monday | Unseasonably cool with a few light rain and snow showers. A chance of an afternoon thunderstorm along with increasing sun breaks. |
| Sunday Night | Unseasonably cool with decreasing light rain and snow showers. Moderate ridgeline winds. |
|---|---|
| Monday | Unseasonably cool with a few light rain and snow showers. A chance of an afternoon thunderstorm along with increasing sun breaks. Moderate ridgeline winds. |
| Sunday Night | Unseasonably cool with decreasing light rain and snow showers. Light to moderate ridgeline winds. |
|---|---|
| Monday | Unseasonably cool with a few light rain and snow showers and a chance of an afternoon thunderstorm along with increasing sun breaks. Light to occasionally moderate ridgeline winds. |
| Sunday Night | Unseasonably cool with increasing light rain and snow showers become moderate in the early morning hours. Moderate to strong ridgeline winds. |
|---|---|
| Monday | Unseasonably cool with moderate rain and snow showers, heavy at times in the morning hours. Moderate ridgeline winds with strong gusts. |
Issued: 4:19 PM PDT Sunday, April 28, 2024
Precipitation (in)
| Sunday Night | Monday | Monday Night | Tuesday | |
|---|---|---|---|---|
| 5 pm - 5 am | 5 am - 5 pm | 5 pm - 5 am | 5 am - 5 pm | |
| Hurricane Ridge | LT 0.25 | LT 0.10 | LT 0.10 | 0 |
| Mt Baker Ski Area | 0.25 | LT 0.25 | LT 0.10 | LT 0.10 |
| Mt. Loop - Barlow Pass | 0.50 - 0.75 | 0.25 | LT 0.25 | LT 0.10 |
| Stevens Pass | 0.25 - 0.50 | 0.25 | 0.25 | LT 0.10 |
| Snoqualmie Pass | 0.25 - 0.50 | LT 0.25 | 0.25 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.25 | LT 0.10 | LT 0.10 |
| Paradise | 0.50 - 0.75 | 0.25 | 0.25 - 0.50 | 0.25 |
| White Pass | 0.25 - 0.50 | 0.25 | 0.25 | LT 0.25 |
| Washington Pass | LT 0.25 | LT 0.10 | LT 0.10 | LT 0.10 |
| Mission Ridge | LT 0.10 | 0 | LT 0.10 | LT 0.10 |
| Salmon la Sac - Gallagher Head | 0.25 | LT 0.25 | LT 0.25 | LT 0.10 |
| Tieton River - Darland Mt. | LT 0.25 | LT 0.10 | LT 0.25 | LT 0.10 |
| Mt Hood Meadows | 0.25 | 0.25 - 0.50 | LT 0.25 | 0.25 |
| Timberline | 0.25 - 0.50 | 0.25 - 0.50 | LT 0.25 | 0.25 |
| Hurricane Ridge | Precipitation (in) |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | 0 |
| Mt Baker Ski Area | Precipitation (in) |
|---|---|
| Sunday Night | 0.25 |
| Monday | LT 0.25 |
| Monday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Mt. Loop - Barlow Pass | Precipitation (in) |
|---|---|
| Sunday Night | 0.50 - 0.75 |
| Monday | 0.25 |
| Monday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Stevens Pass | Precipitation (in) |
|---|---|
| Sunday Night | 0.25 - 0.50 |
| Monday | 0.25 |
| Monday Night | 0.25 |
| Tuesday | LT 0.10 |
| Snoqualmie Pass | Precipitation (in) |
|---|---|
| Sunday Night | 0.25 - 0.50 |
| Monday | LT 0.25 |
| Monday Night | 0.25 |
| Tuesday | LT 0.10 |
| Crystal Mt | Precipitation (in) |
|---|---|
| Sunday Night | LT 0.10 |
| Monday | LT 0.25 |
| Monday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Paradise | Precipitation (in) |
|---|---|
| Sunday Night | 0.50 - 0.75 |
| Monday | 0.25 |
| Monday Night | 0.25 - 0.50 |
| Tuesday | 0.25 |
| White Pass | Precipitation (in) |
|---|---|
| Sunday Night | 0.25 - 0.50 |
| Monday | 0.25 |
| Monday Night | 0.25 |
| Tuesday | LT 0.25 |
| Washington Pass | Precipitation (in) |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | LT 0.10 |
| Monday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Mission Ridge | Precipitation (in) |
|---|---|
| Sunday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | LT 0.10 |
| Tuesday | LT 0.10 |
| Salmon la Sac - Gallagher Head | Precipitation (in) |
|---|---|
| Sunday Night | 0.25 |
| Monday | LT 0.25 |
| Monday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Tieton River - Darland Mt. | Precipitation (in) |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | LT 0.10 |
| Monday Night | LT 0.25 |
| Tuesday | LT 0.10 |
| Mt Hood Meadows | Precipitation (in) |
|---|---|
| Sunday Night | 0.25 |
| Monday | 0.25 - 0.50 |
| Monday Night | LT 0.25 |
| Tuesday | 0.25 |
| Timberline | Precipitation (in) |
|---|---|
| Sunday Night | 0.25 - 0.50 |
| Monday | 0.25 - 0.50 |
| Monday Night | LT 0.25 |
| Tuesday | 0.25 |
Issued: 4:19 PM PDT Sunday, April 28, 2024
Snow Level (ft)
| Sunday Evening | Sunday Night | Monday Morning | Monday Afternoon | Monday Evening | Monday Night | Tuesday Morning | Tuesday Afternoon | |
|---|---|---|---|---|---|---|---|---|
| Olympics | 3000' | 2000' | 2000' | 2500' | 2500' | 2500' | 2500' | 3500' |
| West North | 3500' | 2500' | 2000' | 2500' | 2500' | 2000' | 2500' | 3500' |
| West Central | 3500' | 2500' | 2000' | 3000' | 3000' | 2500' | 2500' | 3500' |
| West South | 4000' | 3000' | 2500' | 3000' | 3000' | 2500' | 2500' | 3500' |
| Stevens Pass | 3500' | 3000' | 2500' | 3000' | 3000' | 2500' | 2500' | 3500' |
| Snoqualmie Pass | 3500' | 3000' | 2500' | 3000' | 3000' | 2500' | 2500' | 3500' |
| East North | 4000' | 3000' | 2000' | 3000' | 2500' | 2000' | 2000' | 3500' |
| East Central | 4000' | 3000' | 2500' | 3000' | 3000' | 2500' | 2500' | 3500' |
| East South | 4000' | 3000' | 2500' | 3000' | 3000' | 2500' | 2500' | 3500' |
| Mt. Hood | 4000' | 3500' | 3000' | 3500' | 3500' | 2500' | 3000' | 3500' |
| Olympics | Elevation |
|---|---|
| Sunday Evening | 3000' |
| Sunday Night | 2000' |
| Monday Morning | 2000' |
| Monday Afternoon | 2500' |
| Monday Evening | 2500' |
| Monday Night | 2500' |
| Tuesday Morning | 2500' |
| Tuesday Afternoon | 3500' |
| West North | Elevation |
|---|---|
| Sunday Evening | 3500' |
| Sunday Night | 2500' |
| Monday Morning | 2000' |
| Monday Afternoon | 2500' |
| Monday Evening | 2500' |
| Monday Night | 2000' |
| Tuesday Morning | 2500' |
| Tuesday Afternoon | 3500' |
| West Central | Elevation |
|---|---|
| Sunday Evening | 3500' |
| Sunday Night | 2500' |
| Monday Morning | 2000' |
| Monday Afternoon | 3000' |
| Monday Evening | 3000' |
| Monday Night | 2500' |
| Tuesday Morning | 2500' |
| Tuesday Afternoon | 3500' |
| West South | Elevation |
|---|---|
| Sunday Evening | 4000' |
| Sunday Night | 3000' |
| Monday Morning | 2500' |
| Monday Afternoon | 3000' |
| Monday Evening | 3000' |
| Monday Night | 2500' |
| Tuesday Morning | 2500' |
| Tuesday Afternoon | 3500' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening | 3500' |
| Sunday Night | 3000' |
| Monday Morning | 2500' |
| Monday Afternoon | 3000' |
| Monday Evening | 3000' |
| Monday Night | 2500' |
| Tuesday Morning | 2500' |
| Tuesday Afternoon | 3500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | 3500' |
| Sunday Night | 3000' |
| Monday Morning | 2500' |
| Monday Afternoon | 3000' |
| Monday Evening | 3000' |
| Monday Night | 2500' |
| Tuesday Morning | 2500' |
| Tuesday Afternoon | 3500' |
| East North | Elevation |
|---|---|
| Sunday Evening | 4000' |
| Sunday Night | 3000' |
| Monday Morning | 2000' |
| Monday Afternoon | 3000' |
| Monday Evening | 2500' |
| Monday Night | 2000' |
| Tuesday Morning | 2000' |
| Tuesday Afternoon | 3500' |
| East Central | Elevation |
|---|---|
| Sunday Evening | 4000' |
| Sunday Night | 3000' |
| Monday Morning | 2500' |
| Monday Afternoon | 3000' |
| Monday Evening | 3000' |
| Monday Night | 2500' |
| Tuesday Morning | 2500' |
| Tuesday Afternoon | 3500' |
| East South | Elevation |
|---|---|
| Sunday Evening | 4000' |
| Sunday Night | 3000' |
| Monday Morning | 2500' |
| Monday Afternoon | 3000' |
| Monday Evening | 3000' |
| Monday Night | 2500' |
| Tuesday Morning | 2500' |
| Tuesday Afternoon | 3500' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | 4000' |
| Sunday Night | 3500' |
| Monday Morning | 3000' |
| Monday Afternoon | 3500' |
| Monday Evening | 3500' |
| Monday Night | 2500' |
| Tuesday Morning | 3000' |
| Tuesday Afternoon | 3500' |
Issued: 4:19 PM PDT Sunday, April 28, 2024
5000' Temperatures (°F)
| Sunday Night | Monday | ||
|---|---|---|---|
| Max / Min | Max / Min | ||
| Olympics | 29 / 20 | 31 / 20 | |
| West North | 30 / 19 | 30 / 20 | |
| West Central | 31 / 24 | 30 / 22 | |
| West South | 33 / 24 | 33 / 23 | |
| Stevens Pass | 31 / 24 | 32 / 24 | |
| Snoqualmie Pass | 31 / 23 | 31 / 24 | |
| East North | 33 / 20 | 32 / 19 | |
| East Central | 34 / 22 | 33 / 22 | |
| East South | 35 / 25 | 34 / 23 | |
| Mt. Hood | 35 / 27 | 33 / 26 |
| Olympics | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 29 / 20 |
| Monday | 31 / 20 |
| West North | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 30 / 19 |
| Monday | 30 / 20 |
| West Central | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 31 / 24 |
| Monday | 30 / 22 |
| West South | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 33 / 24 |
| Monday | 33 / 23 |
| Stevens Pass | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 31 / 24 |
| Monday | 32 / 24 |
| Snoqualmie Pass | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 31 / 23 |
| Monday | 31 / 24 |
| East North | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 33 / 20 |
| Monday | 32 / 19 |
| East Central | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 34 / 22 |
| Monday | 33 / 22 |
| East South | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 35 / 25 |
| Monday | 34 / 23 |
| Mt. Hood | 5000' Temperature Forecast (Max / Min) |
|---|---|
| Sunday Night | 35 / 27 |
| Monday | 33 / 26 |
Issued: 4:19 PM PDT Sunday, April 28, 2024
Ridgeline Winds (mph)
| Sunday Evening | Sunday Night | Monday Morning | Monday Afternoon | |
|---|---|---|---|---|
| Olympics | WSW 5-15 | WSW 5-15 | W 0-10 | WSW 5-15 |
| West North | WSW 5-15 | W 0-10 | W 0-10 | W 5-15 |
| West Central | WSW 10-20 | WSW 10-20 | WNW 5-15 | W 5-15 |
| West South | WSW 15-25 | W 10-20 | W 10-20 | W 10-20 |
| Stevens Pass | W 10-20 | W 10-20 | W 5-15 | WNW 10-20 |
| Snoqualmie Pass | W 15-25 | W 15-25 | W 10-20 | WNW 10-20 |
| East North | WSW 10-20 | WSW 5-15 | WNW 5-15 | W 10-20 |
| East Central | W 20-30 | W 10-20 | W 10-20 | WNW 15-25 |
| East South | WSW 10-20 | W 10-20 | WNW 5-15 | W 10-20 |
| Mt. Hood | W 20-30 | WSW 25-35 | W 15-25 | W 20-30 |
| Olympics | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | WSW 5-15 |
| Sunday Night | WSW 5-15 |
| Monday Morning | W 0-10 |
| Monday Afternoon | WSW 5-15 |
| West North | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | WSW 5-15 |
| Sunday Night | W 0-10 |
| Monday Morning | W 0-10 |
| Monday Afternoon | W 5-15 |
| West Central | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | WSW 10-20 |
| Sunday Night | WSW 10-20 |
| Monday Morning | WNW 5-15 |
| Monday Afternoon | W 5-15 |
| West South | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | WSW 15-25 |
| Sunday Night | W 10-20 |
| Monday Morning | W 10-20 |
| Monday Afternoon | W 10-20 |
| Stevens Pass | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | W 10-20 |
| Sunday Night | W 10-20 |
| Monday Morning | W 5-15 |
| Monday Afternoon | WNW 10-20 |
| Snoqualmie Pass | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | W 15-25 |
| Sunday Night | W 15-25 |
| Monday Morning | W 10-20 |
| Monday Afternoon | WNW 10-20 |
| East North | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | WSW 10-20 |
| Sunday Night | WSW 5-15 |
| Monday Morning | WNW 5-15 |
| Monday Afternoon | W 10-20 |
| East Central | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | W 20-30 |
| Sunday Night | W 10-20 |
| Monday Morning | W 10-20 |
| Monday Afternoon | WNW 15-25 |
| East South | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | WSW 10-20 |
| Sunday Night | W 10-20 |
| Monday Morning | WNW 5-15 |
| Monday Afternoon | W 10-20 |
| Mt. Hood | Ridgeline Winds (mph) |
|---|---|
| Sunday Evening | W 20-30 |
| Sunday Night | WSW 25-35 |
| Monday Morning | W 15-25 |
| Monday Afternoon | W 20-30 |
Issued: 4:19 PM PDT Sunday, April 28, 2024
Extended Weather Synopsis
The cold trough begins to fill, moderate, and slide eastward Tuesday night and Wednesday. This leads to a gradual warming trend with isolated light rain and snow showers for the west slopes of the Cascades. A weaker shortwave trough brings some light rain and snow showers to the region as it passes through on Thursday. Temperatures remain below normal throughout the period.
Extended Snow Level (ft)
| Tuesday Night | Wednesday | Wednesday Night | Thursday | |
|---|---|---|---|---|
| West North | 3000' | 4000' | 4500' | 4500' |
| Snoqualmie Pass | 3500' | 4000' | 4500' | 4500' |
| Mt. Hood | 4000' | 4000' | 5000' | 5000' |
| West North | Elevation |
|---|---|
| Tuesday Night | 3000' |
| Wednesday | 4000' |
| Wednesday Night | 4500' |
| Thursday | 4500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night | 3500' |
| Wednesday | 4000' |
| Wednesday Night | 4500' |
| Thursday | 4500' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night | 4000' |
| Wednesday | 4000' |
| Wednesday Night | 5000' |
| Thursday | 5000' |
Jump to: Weather Forecast I Precipitation I Snow Level I 5000' Temps I Ridgeline Winds I Extended Weather
Previous forecast from Apr 28, 2024
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