Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Saturday & Monday
A fine weekend is in store for the Pacific Northwest with a fair helping of sunshine and rising freezing levels. Upper level ridging over eastern Washington/Oregon will slowly slide east today. A pair of weak upper level shortwaves embedded in SW flow aloft will traverse across Mt. Hood and the south Cascades late this afternoon and tonight. This may bring a stray shower, but most likely just result in an increase in high clouds over the area.
Upper level ridging will further amplify as it retrogrades over the western US on Sunday. This will allow freezing levels to climb further. Offshore flow may create some local temperature inversions in the Cascades Passes today and tomorrow but overall easterly flow is not expected to have a large impact on temperatures/freezing levels.
Dry and mild weather will continue Sunday night, but offshore flow will increase as a weak N-S oriented frontal boundary approaches 130W.
Weather Forecast
Olympics
| Saturday | Mostly sunny. |
| Saturday Night | Partly cloudy with high clouds. |
| Sunday | Mostly sunny, warmer. |
| Sunday Night | Mostly clear. |
Washington Cascades near and west of the Crest including Stevens, Snoqualmie and White Passes
| Saturday | Mostly sunny. |
| Saturday Night | Partly cloudy north Cascades, mostly cloudy south Cascades with high clouds. Slight chance of a shower south Cascades overnight. |
| Sunday | Mostly sunny, warmer. |
| Sunday Night | Mostly clear. Breezy E-SE winds developing Passes and southwest Cascades overnight. |
East Slopes of the Washington Cascades
| Saturday | Mostly sunny with some high clouds south Cascades in the afternoon. |
| Saturday Night | Partly cloudy northeast Cascades, mostly cloudy southeast Cascades with high clouds. Slight chance of a shower southeast Cascades overnight. |
| Sunday | Mostly sunny, warmer. |
| Sunday Night | Mostly clear. |
Mt. Hood
| Saturday | Mostly sunny, then partly sunny with high clouds in the afternoon. |
| Saturday Night | Mostly cloudy. Slight chance of showers overnight. |
| Sunday | Mostly sunny, warmer. |
| Sunday Night | Mostly clear. Breezy E-SE winds developing overnight. |
Issued: 2:51 PM PST Saturday, March 10, 2018
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Saturday Afternoon | Freezing Level * | 6000' | 5500' | 5000' | ' | ' | 5500' | ' | 6500' |
| Saturday Night | Freezing Level * | 6000' | 5500' | 1000' | ' | ' | 3000' | ' | 4500' |
| Sunday Morning | Freezing Level * | 6000' | 5500' | 1000' | ' | ' | 3000' | ' | 4500' |
| Sunday Afternoon | Freezing Level * | 7000' | 6500' | 6500' | ' | ' | 7000' | ' | 8000' |
| Sunday Night | Freezing Level * | 8000' | 7000' | 4000' | ' | ' | 6500' | ' | 8000' |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Afternoon |
Freezing Level 6000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 6000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 6000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 7000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 8000' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Saturday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 5500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Sunday Night |
Freezing Level 7000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Saturday Afternoon |
Freezing Level 5000' (Easterly Flow *) |
| Saturday Night |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 1000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Sunday Night |
Freezing Level 4000' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Saturday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Saturday Night |
Freezing Level ' (Easterly Flow *) |
| Sunday Morning |
Freezing Level ' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Sunday Night |
Freezing Level ' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Saturday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Saturday Night |
Freezing Level ' (Easterly Flow *) |
| Sunday Morning |
Freezing Level ' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Sunday Night |
Freezing Level ' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday Afternoon |
Freezing Level 5500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 3000' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 7000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 6500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Saturday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Saturday Night |
Freezing Level ' (Easterly Flow *) |
| Sunday Morning |
Freezing Level ' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level ' (Easterly Flow *) |
| Sunday Night |
Freezing Level ' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Saturday Afternoon |
Freezing Level 6500' (Easterly Flow *) |
| Saturday Night |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Sunday Afternoon |
Freezing Level 8000' (Easterly Flow *) |
| Sunday Night |
Freezing Level 8000' (Easterly Flow *) |
* 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 | Monday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.10 |
| Mt Baker Ski Area | LT 0.10 | LT 0.10 |
| Washington Pass | LT 0.10 | LT 0.10 |
| Stevens Pass | LT 0.10 | LT 0.10 |
| Snoqualmie Pass | LT 0.10 | LT 0.10 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.10 |
| Paradise | LT 0.10 | LT 0.10 |
| White Pass | LT 0.10 | LT 0.10 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | 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: 2:51 PM PST Saturday, March 10, 2018
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Afternoon | SSE 5 - 15 | SE 5 - 15 | ESE 10 - 20 | --- - | ESE 10 - 20 |
| Saturday Night | S 0 - 10 | SE 0 - 10 | SE 5 - 15 | --- - | ESE 10 - 20 |
| Sunday | SE 0 - 10 | E 0 - 10 | ESE 5 - 15 | --- - | ESE 5 - 15 |
| Sunday Night | SE 5 - 15 | E 5 - 15 | ESE 10 - 20 | --- - | ESE 10 - 20 |
| Hurricane Ridge | Elevation |
|---|---|
| Saturday Afternoon | SSE 5 - 15 |
| Saturday Night | S 0 - 10 |
| Sunday | SE 0 - 10 |
| Sunday Night | SE 5 - 15 |
| Mt. Baker | Elevation |
|---|---|
| Saturday Afternoon | SE 5 - 15 |
| Saturday Night | SE 0 - 10 |
| Sunday | E 0 - 10 |
| Sunday Night | E 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Saturday Afternoon | ESE 10 - 20 |
| Saturday Night | SE 5 - 15 |
| Sunday | ESE 5 - 15 |
| Sunday Night | ESE 10 - 20 |
| Mt. Rainier | Elevation |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday | --- - |
| Sunday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Saturday Afternoon | ESE 10 - 20 |
| Saturday Night | ESE 10 - 20 |
| Sunday | ESE 5 - 15 |
| Sunday Night | ESE 10 - 20 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Saturday Afternoon | SSE 5 - 15 |
| Saturday Night | S 0 - 10 |
| Sunday | SE 0 - 10 |
| Sunday Night | SE 5 - 15 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Afternoon | SE 5 - 15 |
| Saturday Night | SE 0 - 10 |
| Sunday | E 0 - 10 |
| Sunday Night | E 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | ESE 10 - 20 |
| Saturday Night | SE 5 - 15 |
| Sunday | ESE 5 - 15 |
| Sunday Night | ESE 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Afternoon | ESE 10 - 20 |
| Saturday Night | ESE 10 - 20 |
| Sunday | ESE 5 - 15 |
| Sunday Night | ESE 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.
Free Winds at 9000' (mph)
| Mt. Baker | Washington Pass | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Saturday Afternoon | S 10 - 20 | S 10 - 20 | S 10 - 20 | --- - | S 10 - 20 |
| Saturday Night | S 10 - 20 | S 5 - 15 | S 5 - 15 | --- - | SSW 10 - 20 |
| Sunday | S 5 - 15 | S 5 - 15 | S 5 - 15 | --- - | SW 5 - 15 |
| Sunday Night | S 10 - 20 | S 10 - 20 | S 10 - 20 | --- - | S 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Saturday Afternoon | S 10 - 20 |
| Saturday Night | S 10 - 20 |
| Sunday | S 5 - 15 |
| Sunday Night | S 10 - 20 |
| Washington Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | S 10 - 20 |
| Saturday Night | S 5 - 15 |
| Sunday | S 5 - 15 |
| Sunday Night | S 10 - 20 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Saturday Afternoon | S 10 - 20 |
| Saturday Night | S 5 - 15 |
| Sunday | S 5 - 15 |
| Sunday Night | S 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Sunday | --- - |
| Sunday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Saturday Afternoon | S 10 - 20 |
| Saturday Night | SSW 10 - 20 |
| Sunday | SW 5 - 15 |
| Sunday Night | 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: 2:51 PM PST Saturday, March 10, 2018
Extended Weather Synopsis for Monday night through Monday
Monday should be the warmest day of this dry stretch as the ridge amplifies inland with freezing levels generally in the 8000-10000 ft range. However, the approaching Pacific frontal system will ramp up offshore flow, with E-SE winds increasing at crest level and through the Passes, especially from Snoqualmie Pass to Mt. Hood, including the Crystal/Mt. Rainier/White Pass areas.
The front will slow as it approaches the coast Monday night with increasing cloud cover. A secondary shortwave trough will finally push the frontal boundary through Tuesday, with cooler air slowly filtering into the region Tuesday night. The large upper low complex will still be centered offshore, and the cooler air mass plus mid-March heating will help keep a chance of mountain showers in the forecast.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Monday Sunny and warm. Windy near and west of the Cascade crest especially Snoquamlie Pass to Mt. Hood. Tuesday Light rain and snow. Wednesday Partly to mostly cloudy with scattered light rain and snow showers. Monday Night Clouds increasing overnight. Windy near and west of the Cascade crest especially Snoquamlie Pass to Mt. Hood. Tuesday Night Light rain and snow showers. Cooler.Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Monday | Freezing Level | 8000' - 9000' | 8500' - 9500' | 9500' - 10500' | * |
| Monday Night | Freezing Level | 6500' - 7500' | 7500' - 8500' | 8500' - 9500' | * |
| Tuesday | Snow Level | 5000' - 6000' | 5000' - 6000' | 4500' - 5500' | |
| Tuesday Night | Snow Level | 3000' - 4000' | 3500' - 4500' | 3000' - 4000' | |
| Wednesday | Snow Level | 3000' - 4000' | 3000' - 4000' | 3500' - 4500' |
| Mt. Baker | Elevation |
|---|---|
| Monday |
Freezing Level 8000' - 9000' (Easterly Flow *) |
| Monday Night |
Freezing Level 6500' - 7500' (Easterly Flow *) |
| Tuesday |
Snow Level 5000' - 6000' |
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow Level 3000' - 4000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday |
Freezing Level 8500' - 9500' (Easterly Flow *) |
| Monday Night |
Freezing Level 7500' - 8500' (Easterly Flow *) |
| Tuesday |
Snow Level 5000' - 6000' |
| Tuesday Night |
Snow Level 3500' - 4500' |
| Wednesday |
Snow Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Monday |
Freezing Level 9500' - 10500' (Easterly Flow *) |
| Monday Night |
Freezing Level 8500' - 9500' (Easterly Flow *) |
| Tuesday |
Snow Level 4500' - 5500' |
| Tuesday Night |
Snow Level 3000' - 4000' |
| Wednesday |
Snow 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 10, 2018
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