We have some filtered sunshine along with a broad range of mountain temperatures this afternoon. Cool easterly flow and cold temperatures along the east slopes of the Cascades has been battling with milder air to the west. The mild above-freezing temperatures have made inroads for the Mt Hood area higher elevation sites, West South zone including higher elevation sites like Crystal and Snoqualmie while low-level flow has kept Stevens and Snoqualmie Passes, the lower slopes of Mt Hood, and the east slopes of the Cascades in general far chillier.
We'll mix it all up, the lower atmosphere that is, as a weak and dry upper level weather disturbance slides over the area tonight. This system will bring a high overcast this evening that will quickly clear out before sunrise on Tuesday. This system will also crank up the W-NW winds and bring an end to the easterly flow and widespread temperature inversions. Tuesday will be a windy, partly to mostly sunny day freezing levels with in the 2000-3500' range, except slightly warmer down near Mt Hood. If you're planning to climb on the higher peaks or volcanoes above 7000', be prepared for strong NW winds.
The jet stream will reset into norther British Columbia Tuesday night and upper level ridging will once again build over the area. We'll see a warming trend on Wednesday. That said we're likely to see more high clouds near the Canadian border along with slightly cooler temperatures and freezing levels.
Weather Forecast
Olympics
West North
West Central
West South
Stevens Pass
Snoqualmie Pass
East North
East Central
East South
Mt. Hood
Use dropdown to select your zone
Monday
Night
Overcast with high clouds in the evening, then becoming mostly clear after midnight. Light to moderate ridgeline winds increasing after midnight.
Tuesday
Mostly sunny with occasional high clouds. Moderate ridgeline winds easing in the afternoon.
Monday
Night
Overcast with high clouds, then becoming mostly clear late. Light to moderate ridgeline winds increasing after midnight.
Tuesday
Mostly sunny with occasional high clouds. Moderate ridgeline winds easing in the afternoon.
Monday
Night
Overcast with high clouds, then becoming mostly clear late. Light to moderate ridgeline winds increasing after midnight.
Tuesday
Mostly sunny with occasional high clouds. Moderate ridgeline winds easing in the afternoon.
Monday
Night
Becoming overcast in the evening with high clouds, then becoming mostly clear late. Moderate ridgeline winds.
Tuesday
Mostly sunny with occasional high clouds. Moderate ridgeline winds.
Monday
Night
Becoming overcast in the evening with high clouds, then becoming mostly clear late. Moderate W ridgeline winds and light to moderate W at Pass level.
Tuesday
Mostly sunny with occasional high clouds. Moderate ridgeline winds.
Monday
Night
Becoming overcast in the evening with high clouds, then becoming mostly clear late. Moderate W ridgeline winds and light to moderate W at Pass level.
Tuesday
Mostly sunny with occasional high clouds. Moderate ridgeline winds.
Monday
Night
Overcast with high clouds in the evening, then becoming mostly clear after midnight. Moderate ridgeline winds.
Tuesday
Mostly sunny with occasional high clouds. Moderate ridgeline winds.
Monday
Night
Becoming overcast in the evening with high clouds, then becoming mostly clear late. Moderate ridgeline winds becoming strong after midnight.
Tuesday
Mostly sunny with occasional high clouds. Strong ridgeline winds.
Monday
Night
Becoming overcast in the evening with high clouds, then becoming mostly clear late. Moderate ridgeline winds.
Tuesday
Mostly sunny with occasional high clouds. Moderate to strong ridgeline winds.
Monday
Night
Becoming overcast in the evening with high clouds, then becoming mostly clear late. Moderate ridgeline winds becoming strong after midnight.
Tuesday
Mostly sunny with occasional high clouds. Strong ridgeline winds.
Issued: 1:59 PM PST Monday, January 20, 2025
Precipitation (in)
Monday Night
Tuesday
Tuesday Night
Wednesday
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
Mt. Loop - Barlow Pass
0
0
0
0
Stevens Pass
0
0
0
0
Snoqualmie Pass
0
0
0
0
Crystal Mt
0
0
0
0
Paradise
0
0
0
0
White Pass
0
0
0
0
Washington Pass
0
0
0
0
Mission Ridge
0
0
0
0
Salmon la Sac - Gallagher Head
0
0
0
0
Tieton River - Darland Mt.
0
0
0
0
Mt Hood Meadows
0
0
0
0
Timberline
0
0
0
0
Hurricane Ridge
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Mt Baker Ski Area
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Mt. Loop - Barlow Pass
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Stevens Pass
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Snoqualmie Pass
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Crystal Mt
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Paradise
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
White Pass
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Washington Pass
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Mission Ridge
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Salmon la Sac - Gallagher Head
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Tieton River - Darland Mt.
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Mt Hood Meadows
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Timberline
Precipitation (in)
Monday Night
0
Tuesday
0
Tuesday Night
0
Wednesday
0
Issued: 1:59 PM PST Monday, January 20, 2025
Snow Level (ft)
Monday
Evening
Monday
Night
Tuesday
Morning
Tuesday
Afternoon
Tuesday
Evening
Tuesday
Night
Wednesday
Morning
Wednesday
Afternoon*
Olympics
7000'
3500'
2000'
3000'
2500'
2000'
4000'
7500'
West North
2500'
2000'
1000'
2000'
1500'
1000'
2000'
4000'
West Central
3500'
2000'
1500'
2500'
2000'
1500'
3500'
5000'
West South
7000'
2500'
1500'
3500'
2500'
1500'
4500'
7000'
Stevens Pass
1500'
1500'
1500'
2500'
2000'
1500'
2500'
4000'
Snoqualmie Pass
3000'
1500'
1500'
2500'
2000'
1500'
3500'
5000'
East North
0
0
1000'
2000'
1000'
0
2000'
4000'
East Central
1500'
1500'
1500'
2000'
1000'
0
2000'
4000'
East South
1500'
1500'
1500'
3000'
2000'
1500'
4000'
7000'
Mt. Hood
10000'
7500'
5000'
5000'
5000'
5000'
6500'
8000'
Olympics
Elevation
Monday
Evening
7000'
Monday
Night
3500'
Tuesday
Morning
2000'
Tuesday
Afternoon
3000'
Tuesday
Evening
2500'
Tuesday
Night
2000'
Wednesday
Morning
4000'
Wednesday
Afternoon*
7500'
West North
Elevation
Monday
Evening
2500'
Monday
Night
2000'
Tuesday
Morning
1000'
Tuesday
Afternoon
2000'
Tuesday
Evening
1500'
Tuesday
Night
1000'
Wednesday
Morning
2000'
Wednesday
Afternoon*
4000'
West Central
Elevation
Monday
Evening
3500'
Monday
Night
2000'
Tuesday
Morning
1500'
Tuesday
Afternoon
2500'
Tuesday
Evening
2000'
Tuesday
Night
1500'
Wednesday
Morning
3500'
Wednesday
Afternoon*
5000'
West South
Elevation
Monday
Evening
7000'
Monday
Night
2500'
Tuesday
Morning
1500'
Tuesday
Afternoon
3500'
Tuesday
Evening
2500'
Tuesday
Night
1500'
Wednesday
Morning
4500'
Wednesday
Afternoon*
7000'
Stevens Pass
Elevation
Monday
Evening
1500'
Monday
Night
1500'
Tuesday
Morning
1500'
Tuesday
Afternoon
2500'
Tuesday
Evening
2000'
Tuesday
Night
1500'
Wednesday
Morning
2500'
Wednesday
Afternoon*
4000'
Snoqualmie Pass
Elevation
Monday
Evening
3000'
Monday
Night
1500'
Tuesday
Morning
1500'
Tuesday
Afternoon
2500'
Tuesday
Evening
2000'
Tuesday
Night
1500'
Wednesday
Morning
3500'
Wednesday
Afternoon*
5000'
East North
Elevation
Monday
Evening
0'
Monday
Night
0'
Tuesday
Morning
1000'
Tuesday
Afternoon
2000'
Tuesday
Evening
1000'
Tuesday
Night
0'
Wednesday
Morning
2000'
Wednesday
Afternoon*
4000'
East Central
Elevation
Monday
Evening
1500'
Monday
Night
1500'
Tuesday
Morning
1500'
Tuesday
Afternoon
2000'
Tuesday
Evening
1000'
Tuesday
Night
0'
Wednesday
Morning
2000'
Wednesday
Afternoon*
4000'
East South
Elevation
Monday
Evening
1500'
Monday
Night
1500'
Tuesday
Morning
1500'
Tuesday
Afternoon
3000'
Tuesday
Evening
2000'
Tuesday
Night
1500'
Wednesday
Morning
4000'
Wednesday
Afternoon*
7000'
Mt. Hood
Elevation
Monday
Evening
10000'
Monday
Night
7500'
Tuesday
Morning
5000'
Tuesday
Afternoon
5000'
Tuesday
Evening
5000'
Tuesday
Night
5000'
Wednesday
Morning
6500'
Wednesday
Afternoon*
8000'
Issued: 1:59 PM PST Monday, January 20, 2025
5000' Temperatures (°F)
Monday
Night
Tuesday
Max / Min
Max / Min
Olympics
28 / 22
29 / 20
West North
23 / 19
24 / 17
West Central
26 / 19
24 / 16
West South
27 / 22
30 / 20
Stevens Pass
26 / 19
26 / 16
Snoqualmie Pass
26 / 19
25 / 16
East North
24 / 14
27 / 18
East Central
27 / 21
29 / 20
East South
30 / 22
32 / 22
Mt. Hood
36 / 32
35 / 29
Olympics
5000' Temperature Forecast (Max / Min)
Monday
Night
28 / 22
Tuesday
29 / 20
West North
5000' Temperature Forecast (Max / Min)
Monday
Night
23 / 19
Tuesday
24 / 17
West Central
5000' Temperature Forecast (Max / Min)
Monday
Night
26 / 19
Tuesday
24 / 16
West South
5000' Temperature Forecast (Max / Min)
Monday
Night
27 / 22
Tuesday
30 / 20
Stevens Pass
5000' Temperature Forecast (Max / Min)
Monday
Night
26 / 19
Tuesday
26 / 16
Snoqualmie Pass
5000' Temperature Forecast (Max / Min)
Monday
Night
26 / 19
Tuesday
25 / 16
East North
5000' Temperature Forecast (Max / Min)
Monday
Night
24 / 14
Tuesday
27 / 18
East Central
5000' Temperature Forecast (Max / Min)
Monday
Night
27 / 21
Tuesday
29 / 20
East South
5000' Temperature Forecast (Max / Min)
Monday
Night
30 / 22
Tuesday
32 / 22
Mt. Hood
5000' Temperature Forecast (Max / Min)
Monday
Night
36 / 32
Tuesday
35 / 29
Issued: 1:59 PM PST Monday, January 20, 2025
Ridgeline Winds (mph)
Monday
Evening
Monday
Night
Tuesday
Morning
Tuesday
Afternoon
Olympics
W 5-15
W 10-20
WNW 10-20
WNW 5-15
West North
WSW 5-15
WSW 10-20
WSW 10-20
W 5-15
West Central
W 5-15
W 10-20
W 10-20
W 5-15
West South
W 10-20
W 15-25
W 15-25
WNW 15-25
Stevens Pass
W 10-20
W 10-20
W 10-20
W 10-20
Snoqualmie Pass
W 10-20
W 15-25
W 15-25
WNW 15-25
East North
W 10-20
W 15-25
WNW 15-25
WNW 15-25
East Central
W 10-20
W 20-30
WNW 25-35
WNW 20-30
East South
W 10-20
W 15-25
WNW 20-30
WNW 15-25
Mt. Hood
W 10-20
WSW 25-35
WNW 30-40
WNW 20-30
Olympics
Ridgeline Winds (mph)
Monday
Evening
W
5-15
Monday
Night
W
10-20
Tuesday
Morning
WNW
10-20
Tuesday
Afternoon
WNW
5-15
West North
Ridgeline Winds (mph)
Monday
Evening
WSW
5-15
Monday
Night
WSW
10-20
Tuesday
Morning
WSW
10-20
Tuesday
Afternoon
W
5-15
West Central
Ridgeline Winds (mph)
Monday
Evening
W
5-15
Monday
Night
W
10-20
Tuesday
Morning
W
10-20
Tuesday
Afternoon
W
5-15
West South
Ridgeline Winds (mph)
Monday
Evening
W
10-20
Monday
Night
W
15-25
Tuesday
Morning
W
15-25
Tuesday
Afternoon
WNW
15-25
Stevens Pass
Ridgeline Winds (mph)
Monday
Evening
W
10-20
Monday
Night
W
10-20
Tuesday
Morning
W
10-20
Tuesday
Afternoon
W
10-20
Snoqualmie Pass
Ridgeline Winds (mph)
Monday
Evening
W
10-20
Monday
Night
W
15-25
Tuesday
Morning
W
15-25
Tuesday
Afternoon
WNW
15-25
East North
Ridgeline Winds (mph)
Monday
Evening
W
10-20
Monday
Night
W
15-25
Tuesday
Morning
WNW
15-25
Tuesday
Afternoon
WNW
15-25
East Central
Ridgeline Winds (mph)
Monday
Evening
W
10-20
Monday
Night
W
20-30
Tuesday
Morning
WNW
25-35
Tuesday
Afternoon
WNW
20-30
East South
Ridgeline Winds (mph)
Monday
Evening
W
10-20
Monday
Night
W
15-25
Tuesday
Morning
WNW
20-30
Tuesday
Afternoon
WNW
15-25
Mt. Hood
Ridgeline Winds (mph)
Monday
Evening
W
10-20
Monday
Night
WSW
25-35
Tuesday
Morning
WNW
30-40
Tuesday
Afternoon
WNW
20-30
Issued: 1:59 PM PST Monday, January 20, 2025
Extended Weather Synopsis
The warmth and dry weather will continue Wednesday night into mid-day Thursday when finally a weak weather system will approach the area. Unfortunately this system is also looking light on new snowfall, but may bring a few inches Thursday night into Friday across the north and central Cascades. It's unclear how much if any meaningful moisture will make it to the south WA Cascades or Mt Hood area at this time. A blocking high pressure looks to take control over the weekend and early next week...for more dry weather.
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.
The 5000’ temperature forecast does not imply a trend over the 12 hr period and only represents the max and min temperatures within a 12 hr period in the zone. The 6-hr snow level forecast, the forecast discussion, and weather forecast sections may add detail regarding temperature trends.
The snow level forecast represents the general snow level over a 6 hr time period. Freezing levels are forecast when precipitation is not expected.
*Easterly or offshore flow is highlighted with an asterisk when we expect relatively cool east winds in the major Cascade Passes. Easterly flow will often lead to temperature inversions and is a key variable for forecasting precipitation type in the Cascade Passes. Strong easterly flow events can affect terrain on a more regional scale.
Ridgeline winds are the average wind speed and direction over a 6 hr time period.
The wind forecast represents an elevation range instead of a single elevation slice. The elevation range overlaps with the near and above treeline elevation bands in the avalanche forecast and differs per zone.
Wind direction indicates the direction the wind originates or comes from on the 16-point compass rose.
Water Equivalent (WE) is the liquid water equivalent of all precipitation types; rain, snow, ice pellets, etc., forecast to the hundredth of an inch at specific locations. To use WE as a proxy for snowfall amounts, start with a snow to water ratio of 10:1 (10 inches of snow = 1 inch WE). Temperatures at or near freezing will generally have a lower ratio (heavy wet snow) and very cold temperatures can have a much higher ratio (dry fluffy snow).