Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Sunday night through Monday
Although it's the last morning mountain weather forecast of the 2018-2019 winter season, the mountains are still experiencing winter-like conditions. Cool, westerly flow and snow shower activity lingers in a subtle trough behind a departed frontal system. This flow pattern should continue to produce light accumulating snow for most areas near and west of the Cascade Crest through the evening hours, with minimal spillover onto the east slopes. Snow shower activity has been enhanced by a weak disturbance moving through on the westerly flow on Sunday afternoon. The snow shower activity should remain weakly convective through the evening hours with the most snow shower activity from the Mountain Loop to Mt. Rainier. Convergence activity may be locally moderately strong, but convergence zones are expected to wander north and south within the central Washington Cascades. 0.25" or less of snow is expected in most areas. Shower activity should decrease and end by around midnight as an open low approaches the Oregon near-shore waters, ending the moist westerly flow.
Clouds and very light precipitation from the open low should spread into Oregon and possibly the southern Washington volcanoes late in the day on Monday. As the low continues to drift into the Great Basin Monday night, light precipitation is expected to remain in generally same areas with fair weather in most other areas.
Tuesday there may be a gap ahead of the next storm or clouds might begin increasing immediately.
NWAC Spring 2019 Forecast Schedule: Daily Mountain Weather Forecasts, issued only in the afternoons, will continue through April 28th.
Weather Forecast
Hurricane Ridge
| Sunday Night | Light snow showers in the early evening should end, giving way to mostly cloudy skies with a chance of an isolated snow shower. Cool. Light winds. |
| Monday | Partly cloudy in the morning and mostly cloudy in the afternoon with a chance of an isolated snow shower throughout the day. Cool. Light winds. |
Mt. Baker
| Sunday Night | Mostly cloudy with very light snow showers. Cool. Light winds. |
| Monday | Mostly cloudy with an isolated snow shower early, then becoming partly cloudy. Cool. Light winds. |
Washington Pass and Leavenworth
| Sunday Night | Mostly cloudy with chances of isolated snow showers near the Cascade Crest. Cool. Decreasing light winds. |
| Monday | Mostly sunny in the morning becoming mostly cloudy in the afternoon. Light winds switching from W to SE. |
Stevens and Snoqualmie Pass
| Sunday Night | Weakly convective snow showers with potential for moderate convergence zones from just south of Snoqualmie to Stevens Pass. Precipitation tapers by midnight, leaving cloudy skies. Cool. Light winds at 5000 ft and light W wind through the passes. |
| Monday | Decreasing clouds in the morning, becoming partly cloudy. Then increasing mid and high clouds in the afternoon. Cool. Light E wind through the passes and light winds at 5000 ft. |
Mt. Rainier, Crystal and White Pass
| Sunday Night | Weakly convective snow showers decreasing and generally ending during the evening hours. Becoming mostly cloudy. Cool. Light winds. |
| Monday | Partly cloudy early then increasing clouds with clouds lowering and thickening late in the day for the Mt. St. Helens area. Cool. Light winds. |
Mt. Hood
| Sunday Night | Decreasing light snow showers. Cool. Moderate winds gusting strong. |
| Monday | Filtered sunshine early then increasing clouds and a chance of light snow late in the day. Light to moderate winds. |
Issued: 2:31 PM PDT Sunday, April 14, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Sunday Evening | Snow Level | 2500' | 3000' | 3500' | 3500' | 3000' | 3000' | 3000' | 3500' |
| Sunday Night | Snow Level | 2000' | 1500' | 1500' | 2500' | 2000' | 2000' | 2000' | 2500' |
| Monday Morning | Snow Level | 2000' | 1500' | 2000' | 2000' | 2000' | 2000' | 2000' | 2000' |
| Monday Afternoon | Snow Level | 3500' | 3500' | 4500' | 4500' | 4000' | 4000' | 4500' | 4500' |
| Monday Evening | Freezing Level | 4500' | 4000' | 5000' | 5500' | 5000' | 5000' | 5000' | 5000' |
| Monday Night | Freezing Level | 3500' | 2000' | 3500' | 4000' | 3000' | 3000' | 3500' | 5000' |
| Tuesday Morning | Freezing Level | 3500' | 3000' | 4000' | 4000' | 3500' | 3500' | 4000' | 5000' |
| Tuesday Afternoon | Snow Level | 4500' | 4000' | 5500' | 5500' | 4500' | 4500' | 5000' | 5000' |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening |
Snow Level 2500' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Evening |
Freezing Level 4500' |
| Monday Night |
Freezing Level 3500' |
| Tuesday Morning |
Freezing Level 3500' |
| Tuesday Afternoon |
Snow Level 4500' |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 1500' |
| Monday Morning |
Snow Level 1500' |
| Monday Afternoon |
Snow Level 3500' |
| Monday Evening |
Freezing Level 4000' |
| Monday Night |
Freezing Level 2000' |
| Tuesday Morning |
Freezing Level 3000' |
| Tuesday Afternoon |
Snow Level 4000' |
| Washington Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3500' |
| Sunday Night |
Snow Level 1500' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 4500' |
| Monday Evening |
Freezing Level 5000' |
| Monday Night |
Freezing Level 3500' |
| Tuesday Morning |
Freezing Level 4000' |
| Tuesday Afternoon |
Snow Level 5500' |
| Leavenworth | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3500' |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 4500' |
| Monday Evening |
Freezing Level 5500' |
| Monday Night |
Freezing Level 4000' |
| Tuesday Morning |
Freezing Level 4000' |
| Tuesday Afternoon |
Snow Level 5500' |
| Stevens Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 4000' |
| Monday Evening |
Freezing Level 5000' |
| Monday Night |
Freezing Level 3000' |
| Tuesday Morning |
Freezing Level 3500' |
| Tuesday Afternoon |
Snow Level 4500' |
| Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 4000' |
| Monday Evening |
Freezing Level 5000' |
| Monday Night |
Freezing Level 3000' |
| Tuesday Morning |
Freezing Level 3500' |
| Tuesday Afternoon |
Snow Level 4500' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3000' |
| Sunday Night |
Snow Level 2000' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 4500' |
| Monday Evening |
Freezing Level 5000' |
| Monday Night |
Freezing Level 3500' |
| Tuesday Morning |
Freezing Level 4000' |
| Tuesday Afternoon |
Snow Level 5000' |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening |
Snow Level 3500' |
| Sunday Night |
Snow Level 2500' |
| Monday Morning |
Snow Level 2000' |
| Monday Afternoon |
Snow Level 4500' |
| Monday Evening |
Freezing Level 5000' |
| Monday Night |
Freezing Level 5000' |
| Tuesday Morning |
Freezing Level 5000' |
| Tuesday Afternoon |
Snow Level 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.
Precipitation Forecast
| Sunday Night | Monday | Monday Night | Monday | |
|---|---|---|---|---|
| 4 pm - 4 am | 4 am - 4 pm | 4 pm - 4 am | 4 am - 4 pm | |
| Hurricane Ridge | 0 | LT 0.10 | 0 | 0 |
| Mt Baker Ski Area | LT 0.10 | 0 | 0 | LT 0.10 |
| Washington Pass | LT 0.25 | 0 | 0 | 0 |
| Leavenworth | LT 0.10 | 0 | 0 | 0 |
| Stevens Pass | LT 0.25 | 0 | 0 | LT 0.10 |
| Snoqualmie Pass | 0.25 | 0 | 0 | LT 0.10 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | LT 0.10 | 0 | 0 | 0 |
| Paradise | LT 0.25 | 0 | 0 | LT 0.10 |
| White Pass | LT 0.25 | 0 | 0 | LT 0.10 |
| Mt Hood Meadows | LT 0.25 | LT 0.25 | LT 0.25 | LT 0.10 |
| Timberline | LT 0.25 | LT 0.25 | LT 0.25 | LT 0.10 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | LT 0.10 |
| Monday Night | 0 |
| Monday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | LT 0.10 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | LT 0.10 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Sunday Night | 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | LT 0.10 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Sunday Night | 0 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.10 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | LT 0.10 |
| White Pass | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | 0 |
| Monday Night | 0 |
| Monday | LT 0.10 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | LT 0.25 |
| Monday Night | LT 0.25 |
| Monday | LT 0.10 |
| Timberline | Precipitation Forecast |
|---|---|
| Sunday Night | LT 0.25 |
| Monday | LT 0.25 |
| Monday Night | LT 0.25 |
| Monday | LT 0.10 |
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: 2:31 PM PDT Sunday, April 14, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Sunday Evening | WSW 5 - 15 | SW 5 - 15 | WSW 10 - 20 | WSW 5 - 15 | W 15 - 25 |
| Sunday Night | VAR 0 - 10 | SW 5 - 15 | WSW 5 - 15 | WSW 5 - 15 | WSW 10 - 20 |
| Monday Morning | E 5 - 15 | VAR 0 - 10 | VAR 0 - 10 | VAR 0 - 10 | SE 5 - 15 |
| Monday Afternoon | ENE 5 - 15 | VAR 0 - 10 | VAR 5 - 15 | E 0 - 10 | E 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Sunday Evening | WSW 5 - 15 |
| Sunday Night | VAR 0 - 10 |
| Monday Morning | E 5 - 15 |
| Monday Afternoon | ENE 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Sunday Evening | SW 5 - 15 |
| Sunday Night | SW 5 - 15 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | WSW 5 - 15 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | VAR 5 - 15 |
| Mt. Rainier | Elevation |
|---|---|
| Sunday Evening | WSW 5 - 15 |
| Sunday Night | WSW 5 - 15 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Mt. Hood | Elevation |
|---|---|
| Sunday Evening | W 15 - 25 |
| Sunday Night | WSW 10 - 20 |
| Monday Morning | SE 5 - 15 |
| Monday Afternoon | E 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Sunday Evening | WSW 5 - 15 |
| Sunday Night | VAR 0 - 10 |
| Monday Morning | E 5 - 15 |
| Monday Afternoon | ENE 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | SW 5 - 15 |
| Sunday Night | SW 5 - 15 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | VAR 0 - 10 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | WSW 5 - 15 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | VAR 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | WSW 5 - 15 |
| Sunday Night | WSW 5 - 15 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | E 0 - 10 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | W 15 - 25 |
| Sunday Night | WSW 10 - 20 |
| Monday Morning | SE 5 - 15 |
| Monday Afternoon | E 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 | |
|---|---|---|---|---|---|
| Sunday Evening | WSW 10 - 20 | WSW 10 - 20 | WSW 20 - 30 | WSW 20 - 30 | WSW 25 - 35 |
| Sunday Night | WSW 10 - 20 | W 10 - 20 | WSW 15 - 25 | W 15 - 25 | WSW 20 - 30 |
| Monday Morning | W 5 - 15 | VAR 0 - 10 | VAR 0 - 10 | W 0 - 10 | SW 10 - 20 |
| Monday Afternoon | SE 0 - 10 | SSE 5 - 15 | S 5 - 15 | SSE 5 - 15 | S 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | WSW 10 - 20 |
| Monday Morning | W 5 - 15 |
| Monday Afternoon | SE 0 - 10 |
| Washington Pass | Direction - Speed |
|---|---|
| Sunday Evening | WSW 10 - 20 |
| Sunday Night | W 10 - 20 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | SSE 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Sunday Evening | WSW 20 - 30 |
| Sunday Night | WSW 15 - 25 |
| Monday Morning | VAR 0 - 10 |
| Monday Afternoon | S 5 - 15 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Sunday Evening | WSW 20 - 30 |
| Sunday Night | W 15 - 25 |
| Monday Morning | W 0 - 10 |
| Monday Afternoon | SSE 5 - 15 |
| Mt. Hood | Direction - Speed |
|---|---|
| Sunday Evening | WSW 25 - 35 |
| Sunday Night | WSW 20 - 30 |
| Monday Morning | SW 10 - 20 |
| Monday Afternoon | S 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.
Issued: 2:31 PM PDT Sunday, April 14, 2019
Extended Weather Synopsis for Monday night through Monday
A weak front should cross the region Tuesday night and Wednesday morning with a ridge building late in the day into Wednesday night with freezing levels rising to near 10000 ft! A warm moist system of uncertain strength is expected to move into the region from the NW on Thursday bringing warm rain and gradually lowering snow levels.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Tuesday Night | Snow Level | 4000' - 5000' | 4500' - 5500' | 4500' - 5500' | |
| Wednesday | Snow Level | 4500' - 5500' | 4500' - 5500' | 5500' - 7500' | |
| Wednesday Night | Freezing Level | 5500' - 6500' | 7000' - 9000' | 9500' - 11500' | |
| Thursday | Snow Level | 7000' - 8000' | 7000' - 9000' | 9000' - 10000' |
| Mt. Baker | Elevation |
|---|---|
| Tuesday Night |
Snow Level 4000' - 5000' |
| Wednesday |
Snow Level 4500' - 5500' |
| Wednesday Night |
Freezing Level 5500' - 6500' |
| Thursday |
Snow Level 7000' - 8000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Tuesday Night |
Snow Level 4500' - 5500' |
| Wednesday |
Snow Level 4500' - 5500' |
| Wednesday Night |
Freezing Level 7000' - 9000' |
| Thursday |
Snow Level 7000' - 9000' |
| Mt. Hood | Elevation |
|---|---|
| Tuesday Night |
Snow Level 4500' - 5500' |
| Wednesday |
Snow Level 5500' - 7500' |
| Wednesday Night |
Freezing Level 9500' - 11500' |
| Thursday |
Snow Level 9000' - 10000' |
* 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 Apr 14, 2019
The NWAC program is administered by the USDA-Forest Service and operates from the National Weather Service Forecast Office in Seattle. NWAC services are made possible by important collaboration and support from a wide variety of federal, state and private cooperators.