Jump to: Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Weather Synopsis for Friday & Monday
The big news is that an entire day of dryness and relative warmth is on tap for Friday. A high amplitude upper level ridge will move over the West Coast today. After a relatively cool start this morning with most mountain sites in the mid to upper 20s, freezing levels should rise into the 7500-9000 ft range over the Olympics and Cascades. As has been the case with dry weather forecasts as of late, there are a few caveats. The next approaching frontal system should start to spread some high cloud over the area from the SW in the afternoon. Also, offshore gradients will increase though the Passes creating locally breezy conditions this afternoon and tonight. Crest level E-SE winds particularly in the southern/central Washington Cascades and the Mt. Hood area will increase overnight as the next Pacific frontal system approaches.
Mid and high level clouds will increase Friday night in advance of the front, but precipitation should hold off until Saturday morning. Rain and snow will lift northeast over the area during the day on Saturday, followed by post-frontal showers late Saturday afternoon. Showers should taper off Saturday night.
Issued: 7:55 AM PDT Friday, April 21, 2017
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Friday Morning | Freezing Level * | 4500' | 3500' | 3500' | ' | ' | 3500' | ' | 4500' |
| Friday Afternoon - Friday Night | Freezing Level * | 7500' | 7500' | 7000' | ' | ' | 7500' | ' | 8500' |
| Saturday | Snow Level | 5500' | 5500' | 5500' | ' | ' | 5500' | ' | 6000' |
| Saturday Night | Snow Level | 4000' | 4000' | 4000' | ' | ' | 4000' | ' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Friday Afternoon - Friday Night |
Freezing Level 7500' (Easterly Flow *) |
| Saturday |
Snow Level 5500' |
| Saturday Night |
Snow Level 4000' |
| Mt. Baker | Elevation |
|---|---|
| Friday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Friday Afternoon - Friday Night |
Freezing Level 7500' (Easterly Flow *) |
| Saturday |
Snow Level 5500' |
| Saturday Night |
Snow Level 4000' |
| Washington Pass | Elevation |
|---|---|
| Friday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Friday Afternoon - Friday Night |
Freezing Level 7000' (Easterly Flow *) |
| Saturday |
Snow Level 5500' |
| Saturday Night |
Snow Level 4000' |
| Leavenworth | Elevation |
|---|---|
| Friday Morning |
Freezing Level ' (Easterly Flow *) |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Saturday |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Friday Morning |
Freezing Level ' (Easterly Flow *) |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Saturday |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Friday Morning |
Freezing Level 3500' (Easterly Flow *) |
| Friday Afternoon - Friday Night |
Freezing Level 7500' (Easterly Flow *) |
| Saturday |
Snow Level 5500' |
| Saturday Night |
Snow Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Friday Morning |
Freezing Level ' (Easterly Flow *) |
| Friday Afternoon - Friday Night |
Freezing Level ' (Easterly Flow *) |
| Saturday |
Snow Level ' |
| Saturday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Friday Morning |
Freezing Level 4500' (Easterly Flow *) |
| Friday Afternoon - Friday Night |
Freezing Level 8500' (Easterly Flow *) |
| Saturday |
Snow Level 6000' |
| Saturday Night |
Snow Level 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.
Precipitation Forecast
| Monday | Monday | |
|---|---|---|
| Hurricane Ridge | LT 0.10 | LT 0.25 |
| Mt Baker Ski Area | LT 0.10 | 0 - 0.50 |
| Washington Pass | LT 0.10 | LT 0.25 |
| Stevens Pass | LT 0.10 | LT 0.25 |
| Snoqualmie Pass | LT 0.10 | LT 0.25 |
| Mission Ridge | LT 0.10 | LT 0.10 |
| Crystal Mt | LT 0.10 | LT 0.25 |
| Paradise | LT 0.10 | LT 0.25 |
| White Pass | LT 0.10 | LT 0.25 |
| Mt Hood Meadows | LT 0.10 | LT 0.10 |
| Timberline | LT 0.10 | LT 0.25 |
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: 7:55 AM PDT Friday, April 21, 2017
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Friday Morning | E 5 - 15 | VAR 0 - 10 | E 0 - 10 | --- - | VAR 0 - 10 |
| Friday Afternoon | SE 10 - 20 | E 5 - 15 | ESE 15 - 25 | --- - | E 15 - 25 |
| Friday Night - Saturday Morning | SE 10 - 20 | E 5 - 15 | ESE 20 - 35 | --- - | ESE 15 - 30 |
| Saturday Afternoon | SSW 15 - 25 | S 15 - 25 | SW 10 - 20 | --- - | WSW 10 - 20 |
| Saturday Night | SW 0 - 10 | S 5 - 15 | SW 0 - 10 | --- - | WSW 5 - 15 |
| Hurricane Ridge | Elevation |
|---|---|
| Friday Morning | E 5 - 15 |
| Friday Afternoon | SE 10 - 20 |
| Friday Night - Saturday Morning | SE 10 - 20 |
| Saturday Afternoon | SSW 15 - 25 |
| Saturday Night | SW 0 - 10 |
| Mt. Baker | Elevation |
|---|---|
| Friday Morning | VAR 0 - 10 |
| Friday Afternoon | E 5 - 15 |
| Friday Night - Saturday Morning | E 5 - 15 |
| Saturday Afternoon | S 15 - 25 |
| Saturday Night | S 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Friday Morning | E 0 - 10 |
| Friday Afternoon | ESE 15 - 25 |
| Friday Night - Saturday Morning | ESE 20 - 35 |
| Saturday Afternoon | SW 10 - 20 |
| Saturday Night | SW 0 - 10 |
| Mt. Rainier | Elevation |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Friday Morning | VAR 0 - 10 |
| Friday Afternoon | E 15 - 25 |
| Friday Night - Saturday Morning | ESE 15 - 30 |
| Saturday Afternoon | WSW 10 - 20 |
| Saturday Night | WSW 5 - 15 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Friday Morning | E 5 - 15 |
| Friday Afternoon | SE 10 - 20 |
| Friday Night - Saturday Morning | SE 10 - 20 |
| Saturday Afternoon | SSW 15 - 25 |
| Saturday Night | SW 0 - 10 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Morning | VAR 0 - 10 |
| Friday Afternoon | E 5 - 15 |
| Friday Night - Saturday Morning | E 5 - 15 |
| Saturday Afternoon | S 15 - 25 |
| Saturday Night | S 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Morning | E 0 - 10 |
| Friday Afternoon | ESE 15 - 25 |
| Friday Night - Saturday Morning | ESE 20 - 35 |
| Saturday Afternoon | SW 10 - 20 |
| Saturday Night | SW 0 - 10 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Morning | VAR 0 - 10 |
| Friday Afternoon | E 15 - 25 |
| Friday Night - Saturday Morning | ESE 15 - 30 |
| Saturday Afternoon | WSW 10 - 20 |
| Saturday Night | WSW 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 Morning | N 5 - 15 | N 5 - 15 | E 0 - 10 | --- - | NW 0 - 10 |
| Friday Afternoon | SE 5 - 15 | SE 5 - 15 | SE 20 - 30 | --- - | S 10 - 20 |
| Friday Night - Saturday Morning | S 10 - 20 | S 15 - 25 | S 20 - 30 | --- - | S 15 - 25 |
| Saturday Afternoon | SW 25 - 35 | SW 15 - 25 | SW 20 - 30 | --- - | SW 25 - 35 |
| Saturday Night | SW 5 - 15 | WSW 5 - 15 | WSW 10 - 20 | --- - | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Friday Morning | N 5 - 15 |
| Friday Afternoon | SE 5 - 15 |
| Friday Night - Saturday Morning | S 10 - 20 |
| Saturday Afternoon | SW 25 - 35 |
| Saturday Night | SW 5 - 15 |
| Washington Pass | Direction - Speed |
|---|---|
| Friday Morning | N 5 - 15 |
| Friday Afternoon | SE 5 - 15 |
| Friday Night - Saturday Morning | S 15 - 25 |
| Saturday Afternoon | SW 15 - 25 |
| Saturday Night | WSW 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Friday Morning | E 0 - 10 |
| Friday Afternoon | SE 20 - 30 |
| Friday Night - Saturday Morning | S 20 - 30 |
| Saturday Afternoon | SW 20 - 30 |
| Saturday Night | WSW 10 - 20 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Friday Morning | --- - |
| Friday Afternoon | --- - |
| Friday Night - Saturday Morning | --- - |
| Saturday Afternoon | --- - |
| Saturday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Friday Morning | NW 0 - 10 |
| Friday Afternoon | S 10 - 20 |
| Friday Night - Saturday Morning | S 15 - 25 |
| Saturday Afternoon | SW 25 - 35 |
| Saturday Night | SW 15 - 25 |
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.
Jump to: Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k
Previous forecast from Apr 20, 2017
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