Jump to: Weather Forecast I Snow/Freezing Level I Precipitation I Free Winds 5k I Free Winds 9k I Extended Weather
Weather Synopsis for Monday night through Tuesday
A very strong high-pressure is setting record high temperatures across the Puget Sound lowlands on Monday afternoon as the high drifts E across south-central BC and moderate to strong E flow warms across the Cascades barrier. The air accelerating through the mountain gaps will produce strong winds west of the gaps with very strong gusts, but the ESE winds will also be strong at many ridge-top locations. If you head to the mountains, prepare for warm weather, but factor in the wind chill in exposed locations.
Models forecast the warmest day of this March heat wave on Tuesday, featuring very slightly warmer temperatures than Monday across the region, with Wednesday cooling very slightly, but not appreciably. Both days may set high-temperature records across the region. We expect several more nights of very mild temperatures with lows in the 30s and 40s in many locations on Monday night and Tuesday night with temperatures cooling off more at night in the valleys east of the Cascade crest, but warming quickly during the days.
By Wednesday, an open trough under-cuts the high as the high slides east over Alberta. The trough will bring active weather to California and may spread some slight cloud-cover to coastal areas of our region during the day. The influence of the trough will also weaken the E flow during the day.
Weather Forecast
Hurricane Ridge
| Monday Night | Clear and unseasonably mild. Moderate winds. |
| Tuesday | Sunny and unseasonably warm. Light to moderate winds. |
Mt. Baker
| Monday Night | Clear and unseasonably mild. Light winds. |
| Tuesday | Sunny and unseasonably warm. Light winds. |
Washington Pass and Leavenworth
| Monday Night | Clear and unseasonably mild. Light to moderate winds, stronger in the south. Shallow inversion developing in deeper valley locations. |
| Tuesday | Sunny and unseasonably warm. Light to moderate winds, stronger in the south. |
Stevens and Snoqualmie Pass
| Monday Night | Clear and unseasonably mild. Moderate 5000 ft winds. Moderate pass-level winds gusting strong. Strong winds gusting very strong west of Snoqualmie Pass. Very shallow inversion developing in deeper valley locations. |
| Tuesday | Sunny and unseasonably warm. Moderate 5000 ft winds. Moderate pass-level winds gusting strong. Strong winds west of Snoqualmie Pass. |
Mt. Rainier, Crystal and White Pass
| Monday Night | Clear and unseasonably mild. Moderate winds gusting strong |
| Tuesday | Sunny and unseasonably mild. Moderate winds gusting strong. |
Mt. Hood
| Monday Night | Clear and unseasonably mild. Moderate 5000 ft winds gusting strong. |
| Tuesday | Sunny and unseasonably mild. Moderate 5000 ft winds gusting strong. |
Issued: 2:46 PM PDT Monday, March 18, 2019
Snow/Freezing Level (ft)
| Hurricane Ridge | Mt. Baker | Washington Pass | Leavenworth | Stevens Pass | Snoqualmie Pass | Mt. Rainier, Crystal & White Pass | Mt. Hood | ||
|---|---|---|---|---|---|---|---|---|---|
| Monday Evening | Freezing Level * | 10500' | 10500' | 9000' | 9000' | 9000' | 10000' | 9000' | 9500' |
| Monday Night | Freezing Level * | 10000' | 8500' | 7500' | 8000' | 7500' | 9500' | 8500' | 9000' |
| Tuesday Morning | Freezing Level * | 10000' | 8000' | 8000' | 8500' | 8000' | 9500' | 9000' | 9000' |
| Tuesday Afternoon | Freezing Level * | 10000' | 10500' | 10000' | 9500' | 10000' | 10000' | 9500' | 9500' |
| Tuesday Evening | Freezing Level * | 10000' | 10500' | 9500' | 9500' | 9500' | 10000' | 9500' | 9500' |
| Tuesday Night | Freezing Level * | 9500' | 9000' | 8500' | 8500' | 8000' | 10000' | 9000' | 9500' |
| Wednesday Morning | Freezing Level * | 9500' | 9000' | 9000' | 9000' | 9000' | 9000' | 9000' | 9000' |
| Wednesday Afternoon | Freezing Level * | 9500' | 10000' | 9500' | 9500' | 9500' | 9500' | 9500' | 9500' |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening |
Freezing Level 10500' (Easterly Flow *) |
| Monday Night |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 9500' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9500' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening |
Freezing Level 10500' (Easterly Flow *) |
| Monday Night |
Freezing Level 8500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 10500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 10500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Washington Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Monday Night |
Freezing Level 7500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 8500' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Leavenworth | Elevation |
|---|---|
| Monday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Monday Night |
Freezing Level 8000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 8500' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 8500' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Stevens Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Monday Night |
Freezing Level 7500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 8000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 8000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening |
Freezing Level 10000' (Easterly Flow *) |
| Monday Night |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 10000' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 10000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Mt. Rainier & Crystal | Elevation |
|---|---|
| Monday Evening |
Freezing Level 9000' (Easterly Flow *) |
| Monday Night |
Freezing Level 8500' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening |
Freezing Level 9500' (Easterly Flow *) |
| Monday Night |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Tuesday Afternoon |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Evening |
Freezing Level 9500' (Easterly Flow *) |
| Tuesday Night |
Freezing Level 9500' (Easterly Flow *) |
| Wednesday Morning |
Freezing Level 9000' (Easterly Flow *) |
| Wednesday Afternoon |
Freezing Level 9500' (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 Night | Tuesday | Tuesday Night | Tuesday | |
|---|---|---|---|---|
| 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 |
| Washington Pass | 0 | 0 | 0 | 0 |
| Leavenworth | 0 | 0 | 0 | 0 |
| Stevens Pass | 0 | 0 | 0 | 0 |
| Snoqualmie Pass | 0 | 0 | 0 | 0 |
| Mission Ridge | 0 | 0 | 0 | 0 |
| Crystal Mt | 0 | 0 | 0 | 0 |
| Paradise | 0 | 0 | 0 | 0 |
| White Pass | 0 | 0 | 0 | 0 |
| Mt Hood Meadows | 0 | 0 | 0 | 0 |
| Timberline | 0 | 0 | 0 | 0 |
| Hurricane Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mt Baker Ski Area | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Washington Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Leavenworth | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Stevens Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Snoqualmie Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mission Ridge | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Crystal Mt | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Paradise | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| White Pass | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Mt Hood Meadows | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
| Timberline | Precipitation Forecast |
|---|---|
| Monday Night | 0 |
| Tuesday | 0 |
| Tuesday Night | 0 |
| Tuesday | 0 |
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: 2:46 PM PDT Monday, March 18, 2019
Free Winds at 5000' (mph)
| Hurricane Ridge | Mt. Baker | Stevens to Snoqualmie Pass | Mt. Rainier | Mt. Hood | |
|---|---|---|---|---|---|
| Monday Evening | ESE 15 - 25 | E 5 - 15 | E 15 - 25 | E 15 - 25 | E 20 - 30 |
| Monday Night | ESE 10 - 20 | E 5 - 15 | ESE 15 - 25 | ESE 15 - 25 | ESE 20 - 30 |
| Tuesday Morning | ESE 10 - 20 | E 5 - 15 | E 15 - 25 | E 15 - 25 | E 25 - 35 |
| Tuesday Afternoon | ESE 10 - 20 | E 5 - 15 | E 15 - 25 | E 15 - 25 | E 20 - 30 |
| Hurricane Ridge | Elevation |
|---|---|
| Monday Evening | ESE 15 - 25 |
| Monday Night | ESE 10 - 20 |
| Tuesday Morning | ESE 10 - 20 |
| Tuesday Afternoon | ESE 10 - 20 |
| Mt. Baker | Elevation |
|---|---|
| Monday Evening | E 5 - 15 |
| Monday Night | E 5 - 15 |
| Tuesday Morning | E 5 - 15 |
| Tuesday Afternoon | E 5 - 15 |
| Stevens and Snoqualmie Pass | Elevation |
|---|---|
| Monday Evening | E 15 - 25 |
| Monday Night | ESE 15 - 25 |
| Tuesday Morning | E 15 - 25 |
| Tuesday Afternoon | E 15 - 25 |
| Mt. Rainier | Elevation |
|---|---|
| Monday Evening | E 15 - 25 |
| Monday Night | ESE 15 - 25 |
| Tuesday Morning | E 15 - 25 |
| Tuesday Afternoon | E 15 - 25 |
| Mt. Hood | Elevation |
|---|---|
| Monday Evening | E 20 - 30 |
| Monday Night | ESE 20 - 30 |
| Tuesday Morning | E 25 - 35 |
| Tuesday Afternoon | E 20 - 30 |
| Hurricane Ridge | Direction - Speed |
|---|---|
| Monday Evening | ESE 15 - 25 |
| Monday Night | ESE 10 - 20 |
| Tuesday Morning | ESE 10 - 20 |
| Tuesday Afternoon | ESE 10 - 20 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | E 5 - 15 |
| Monday Night | E 5 - 15 |
| Tuesday Morning | E 5 - 15 |
| Tuesday Afternoon | E 5 - 15 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | E 15 - 25 |
| Monday Night | ESE 15 - 25 |
| Tuesday Morning | E 15 - 25 |
| Tuesday Afternoon | E 15 - 25 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | E 15 - 25 |
| Monday Night | ESE 15 - 25 |
| Tuesday Morning | E 15 - 25 |
| Tuesday Afternoon | E 15 - 25 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | E 20 - 30 |
| Monday Night | ESE 20 - 30 |
| Tuesday Morning | E 25 - 35 |
| Tuesday Afternoon | E 20 - 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 | |
|---|---|---|---|---|---|
| Monday Evening | ESE 5 - 15 | SE 15 - 25 | ESE 30 - 45 | ESE 30 - 45 | ESE 25 - 35 |
| Monday Night | SE 5 - 15 | SE 15 - 25 | ESE 25 - 35 | ESE 25 - 35 | SE 20 - 30 |
| Tuesday Morning | SE 15 - 25 | SE 20 - 30 | ESE 35 - 50 | ESE 35 - 50 | SE 25 - 35 |
| Tuesday Afternoon | SE 15 - 25 | SE 25 - 35 | ESE 35 - 50 | SE 35 - 50 | SE 25 - 35 |
| Mt. Baker | Direction - Speed |
|---|---|
| Monday Evening | ESE 5 - 15 |
| Monday Night | SE 5 - 15 |
| Tuesday Morning | SE 15 - 25 |
| Tuesday Afternoon | SE 15 - 25 |
| Washington Pass | Direction - Speed |
|---|---|
| Monday Evening | SE 15 - 25 |
| Monday Night | SE 15 - 25 |
| Tuesday Morning | SE 20 - 30 |
| Tuesday Afternoon | SE 25 - 35 |
| Stevens and Snoqualmie Pass | Direction - Speed |
|---|---|
| Monday Evening | ESE 30 - 45 |
| Monday Night | ESE 25 - 35 |
| Tuesday Morning | ESE 35 - 50 |
| Tuesday Afternoon | ESE 35 - 50 |
| Mt. Rainier | Direction - Speed |
|---|---|
| Monday Evening | ESE 30 - 45 |
| Monday Night | ESE 25 - 35 |
| Tuesday Morning | ESE 35 - 50 |
| Tuesday Afternoon | SE 35 - 50 |
| Mt. Hood | Direction - Speed |
|---|---|
| Monday Evening | ESE 25 - 35 |
| Monday Night | SE 20 - 30 |
| Tuesday Morning | SE 25 - 35 |
| Tuesday Afternoon | SE 25 - 35 |
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: 2:46 PM PDT Monday, March 18, 2019
Extended Weather Synopsis for Tuesday night through Tuesday
Wednesday night through Thursday night will be dry and mild, but slightly cooler than earlier in the weak. The trough to our south will continue to move through the desert southwest. An extended and weakening front will bring additional cooling along with wetter and more unsettled conditions to our region before the end of the day on Friday. However, this does not appear to be a major storm.
Extended Snow/Freezing Levels
| Mt. Baker | Snoqualmie Pass | Mt. Hood | Easterly Flow * | ||
|---|---|---|---|---|---|
| Wednesday Night | Freezing Level | 9000' - 10000' | 8500' - 9500' | 8000' - 9000' | |
| Thursday | Freezing Level | 7500' - 8500' | 7500' - 8500' | 7000' - 8000' | |
| Thursday Night | Freezing Level | 7000' - 8000' | 7000' - 8000' | 7000' - 8000' | |
| Friday | Snow Level | 5000' - 6000' | 5500' - 6500' | 6000' - 7000' |
| Mt. Baker | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 9000' - 10000' |
| Thursday |
Freezing Level 7500' - 8500' |
| Thursday Night |
Freezing Level 7000' - 8000' |
| Friday |
Snow Level 5000' - 6000' |
| Snoqualmie Pass | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 8500' - 9500' |
| Thursday |
Freezing Level 7500' - 8500' |
| Thursday Night |
Freezing Level 7000' - 8000' |
| Friday |
Snow Level 5500' - 6500' |
| Mt. Hood | Elevation |
|---|---|
| Wednesday Night |
Freezing Level 8000' - 9000' |
| Thursday |
Freezing Level 7000' - 8000' |
| Thursday Night |
Freezing Level 7000' - 8000' |
| Friday |
Snow Level 6000' - 7000' |
* 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 18, 2019
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