Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Thursday & Thursday
An upper level disturbance passing through southern Washington and northern Oregon will bring a round of moderate to heavy showers to mainly the Mt. Hood region for the first half of today along with moderately strong winds. Light showers should be seen further north. An approaching frontal system extending from a deep upper low well offshore should approach the PNW overnight...spreading light rain and snow into the Olympics during the early morning hours of Friday.
Steady precipitation should spread inland to the Cascades and Mt. Hood on Friday. With more of a southerly component to this system...precipitation totals should be highest for the south slopes and volcanoes. Easterly flow Friday morning may help keep snow levels low initially low in the passes...but a moderate warming trend is expected to take hold everywhere by Friday afternoon. Showers should follow Friday night along with a slight cooling trend and be on the light side except locally moderate around Mt. Baker.
Weather Forecast
Olympics
| Thursday - Thursday Evening |
Mostly cloudy with scattered rain and snow showers. |
| Thursday Night |
Light rain and snow developing. |
| Friday |
Light to moderate rain and snow, heaviest south slopes. Warming trend. |
| Friday Night |
Light rain and snow showers, except moderate near Mt. Baker. Slight cooling trend. |
Washington Cascades near and west of the crest
| Thursday - Thursday Night |
Mostly cloudy with scattered rain and snow showers tapering down overnight. |
| Friday |
Light to moderate rain and snow developing in the morning, heaviest volcanoes. Warming in the afternoon. |
| Friday Night |
Light rain and snow showers, except moderate near Mt. Baker. Slight cooling trend. |
East slopes of the Washington Cascades
| Thursday - Thursday Night |
Mostly cloudy with scattered rain and snow showers tapering down overnight and becoming partly cloudy. |
| Friday |
Light to moderate rain and snow developing in the morning. Warming in the afternoon. |
| Friday Night |
Light rain and snow showers. Slight cooling trend. |
Mt. Hood Area
| Thursday Afternoon - Thursday Evening |
Mostly cloudy with light to moderate rain and snow showers tapering down in the evening. |
| Thursday Night |
Light to moderate rain and snow developing. |
| Friday |
Moderate to occasionally heavy rain and snow, windy. Warming in the afternoon. |
| Friday Night |
Mostly cloudy with light to occasionally moderate rain and snow showers. |
Issued: 2:56 PM PDT Thursday, March 27, 2014
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Thursday Afternoon - Thursday Evening | Snow Level | 4000' | ' | ' | ' | ' | 4000' | ' | 4500' |
| Thursday Night - Friday Morning | Snow Level * | 4000' | ' | ' | ' | ' | 3500' | ' | 4500' |
| Friday Afternoon | Snow Level * | 5000' | ' | ' | ' | ' | 5000' | ' | 5500' |
| Friday Night | Snow Level | 4000' | ' | ' | ' | ' | 4000' | ' | 4500' |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Afternoon - Thursday Evening |
Snow Level 4000' |
| Thursday Night - Friday Morning |
Snow Level 4000' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Friday Night |
Snow Level 4000' |
| Mt. Baker | Elevation |
|---|---|
| Thursday Afternoon - Thursday Evening |
Snow Level ' |
| Thursday Night - Friday Morning |
Snow Level ' (Easterly Flow *) |
| Friday Afternoon |
Snow Level ' (Easterly Flow *) |
| Friday Night |
Snow Level ' |
| Washington Pass | Elevation |
|---|---|
| Thursday Afternoon - Thursday Evening |
Snow Level ' |
| Thursday Night - Friday Morning |
Snow Level ' (Easterly Flow *) |
| Friday Afternoon |
Snow Level ' (Easterly Flow *) |
| Friday Night |
Snow Level ' |
| Leavenworth | Elevation |
|---|---|
| Thursday Afternoon - Thursday Evening |
Snow Level ' |
| Thursday Night - Friday Morning |
Snow Level ' (Easterly Flow *) |
| Friday Afternoon |
Snow Level ' (Easterly Flow *) |
| Friday Night |
Snow Level ' |
| Stevens Pass | Elevation |
|---|---|
| Thursday Afternoon - Thursday Evening |
Snow Level ' |
| Thursday Night - Friday Morning |
Snow Level ' (Easterly Flow *) |
| Friday Afternoon |
Snow Level ' (Easterly Flow *) |
| Friday Night |
Snow Level ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Thursday Afternoon - Thursday Evening |
Snow Level 4000' |
| Thursday Night - Friday Morning |
Snow Level 3500' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5000' (Easterly Flow *) |
| Friday Night |
Snow Level 4000' |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Thursday Afternoon - Thursday Evening |
Snow Level ' |
| Thursday Night - Friday Morning |
Snow Level ' (Easterly Flow *) |
| Friday Afternoon |
Snow Level ' (Easterly Flow *) |
| Friday Night |
Snow Level ' |
| Mt. Hood | Elevation |
|---|---|
| Thursday Afternoon - Thursday Evening |
Snow Level 4500' |
| Thursday Night - Friday Morning |
Snow Level 4500' (Easterly Flow *) |
| Friday Afternoon |
Snow Level 5500' (Easterly Flow *) |
| Friday 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
| Thursday | Thursday | |
|---|---|---|
| Hurricane Ridge | LT 0.25 | 0 - 0.50 |
| Mt Baker Ski Area | LT 0.25 | 1.00 - 1.50 |
| Washington Pass | LT 0.10 | 0.50 - 0.75 |
| Stevens Pass | LT 0.25 | 0.50 - 0.75 |
| Snoqualmie Pass | LT 0.25 | 0.50 - 0.75 |
| Mission Ridge | LT 0.10 | 0 - 0.50 |
| Crystal Mt | 0.25 - 0.50 | 0 - 0.75 |
| Paradise | 0 - 0.50 | 1.00 - 1.50 |
| White Pass | 0 - 0.50 | 0.50 - 0.75 |
| Mt Hood Meadows | 1.00 - 1.50 | 0 - 1.50 |
| Timberline | 0 - 1.50 | 0 - 2.00 |
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: 2:56 PM PDT Thursday, March 27, 2014
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Thursday Afternoon | SW 5 - 15 | --- - | W 5 - 15 | --- - | SW 15 - 30 |
| Thursday Night | S 10 - 20 | --- - | SW 5 - 15 | --- - | SW 10 - 20 |
| Friday Morning - Friday Mid-day | SW 15 - 25 | --- - | SSE 15 - 25 | --- - | SW 15 - 30 |
| Friday Afternoon - Friday Night | SW 15 - 25 | --- - | SW 15 - 25 | --- - | SW 15 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Thursday Afternoon | SW 5 - 15 |
| Thursday Night | S 10 - 20 |
| Friday Morning - Friday Mid-day | SW 15 - 25 |
| Friday Afternoon - Friday Night | SW 15 - 25 |
| Mt. Baker | Elevation |
|---|---|
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Friday Morning - Friday Mid-day | --- - |
| Friday Afternoon - Friday Night | --- - |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Thursday Afternoon | W 5 - 15 |
| Thursday Night | SW 5 - 15 |
| Friday Morning - Friday Mid-day | SSE 15 - 25 |
| Friday Afternoon - Friday Night | SW 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Friday Morning - Friday Mid-day | --- - |
| Friday Afternoon - Friday Night | --- - |
| Mt. Hood | Elevation |
|---|---|
| Thursday Afternoon | SW 15 - 30 |
| Thursday Night | SW 10 - 20 |
| Friday Morning - Friday Mid-day | SW 15 - 30 |
| Friday Afternoon - Friday Night | SW 15 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Thursday Afternoon | SW 5 - 15 |
| Thursday Night | S 10 - 20 |
| Friday Morning - Friday Mid-day | SW 15 - 25 |
| Friday Afternoon - Friday Night | SW 15 - 25 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Friday Morning - Friday Mid-day | --- - |
| Friday Afternoon - Friday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday Afternoon | W 5 - 15 |
| Thursday Night | SW 5 - 15 |
| Friday Morning - Friday Mid-day | SSE 15 - 25 |
| Friday Afternoon - Friday Night | SW 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday Afternoon | --- - |
| Thursday Night | --- - |
| Friday Morning - Friday Mid-day | --- - |
| Friday Afternoon - Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday Afternoon | SW 15 - 30 |
| Thursday Night | SW 10 - 20 |
| Friday Morning - Friday Mid-day | SW 15 - 30 |
| Friday Afternoon - Friday Night | SW 15 - 30 |
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 | |
|---|---|---|---|---|---|
| Thursday - Afternoon | --- - | --- - | W 15 - 25 | --- - | W 30 - 40 |
| Thursday Night | --- - | --- - | SW 20 - 30 | --- - | WSW 25 - 35 |
| Friday - Friday Night | --- - | --- - | SW 30 - 45 | --- - | SW 40 - 50 |
| Mt. Baker | Direction - Speed |
|---|---|
| Thursday - Afternoon | --- - |
| Thursday Night | --- - |
| Friday - Friday Night | --- - |
| Washington Pass | Direction - Speed |
|---|---|
| Thursday - Afternoon | --- - |
| Thursday Night | --- - |
| Friday - Friday Night | --- - |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Thursday - Afternoon | W 15 - 25 |
| Thursday Night | SW 20 - 30 |
| Friday - Friday Night | SW 30 - 45 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Thursday - Afternoon | --- - |
| Thursday Night | --- - |
| Friday - Friday Night | --- - |
| Mt. Hood | Direction - Speed |
|---|---|
| Thursday - Afternoon | W 30 - 40 |
| Thursday Night | WSW 25 - 35 |
| Friday - Friday Night | SW 40 - 50 |
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: 2:56 PM PDT Thursday, March 27, 2014
Extended Weather Synopsis for Thursday night through Thursday
The next shortwave rotating around the upper low parked offshore should come through Saturday afternoon and bring a more focused area of showers through the region. The longwave trough axis associated with the upper low should pass through the region on Sunday as the low ejects to the west. Snow levels may be slightly lower on Sunday as the coldest air aloft passes through.
A cut-off low should approach the area on Monday. Forecast models suggest that precipitation from the frontal band extending from the low may clip the central Washington Cascades to Mt. Hood area or pass entirely to our south into California.
Extended Weather
Olympics, Washington Cascades and Mt. Hood Area
Mostly cloudy with light to occasionally moderate rain and snow showers increasing in the afternoon.
Mostly cloudy with scattered light rain and snow showers. Slight cooling trend.
Mostly cloudy with possible light rain or snow developing Olympics, south Washington Cascades and Mt. Hood area.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Saturday - Saturday Night | Snow Level | ' - ' | 3500' - 4500' | 3500' - 4500' | |
| Sunday - Monday | Snow Level | ' - ' | 3000' - 4000' | 3000' - 4000' |
| Mt. Baker | Elevation |
|---|---|
| Saturday - Saturday Night |
Snow Level ' - ' |
| Sunday - Monday |
Snow Level ' - ' |
| Snoqualmie Pass | Elevation |
|---|---|
| Saturday - Saturday Night |
Snow Level 3500' - 4500' |
| Sunday - Monday |
Snow Level 3000' - 4000' |
| Mt. Hood | Elevation |
|---|---|
| Saturday - Saturday Night |
Snow Level 3500' - 4500' |
| Sunday - Monday |
Snow Level 3000' - 4000' |
* 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 27, 2014
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