MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: Thursday 0930

Current Observations:

24hr Precipitation: 0    

Temperature profile:  32 base. 29 ridge     

Pass level winds:  calm, westerly      

Barometer: 1021mb’s             

Sky: Broken mid level clouds            

Radar: Clear to the west with a mid level cloud deck over the mountains and eastern basin.

The Forecast:   This stretch of dry weather with warmer temperatures will continue through the weekend.

Long Range:  There will be a chance of some light mixed rain and snow on Monday and Tuesday with the remainder of next week trending dry.   

There are no significant snow or rain events on the horizon for the PNW.

  

The Science:  High pressure stationed off of the PNW coast will continue to dominate the weather pattern through the weekend. Some weak disturbances will make it through on Monday and Tuesday.  Freezing levels be at 5000’ or above through weekend with cooler temperatures arriving late next week.    

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: 0 snow: 0 Tomorrow’s 24hr water: 0  snow: 0 Trend and Timing: Dry through early Monday morning.

Temperature: Low: 32   High: 45 Freezing level: 7000’ Trend and Timing:    Freezing level will be well above Pass level for the next few days.

Winds Base:  0-5 W  shifting E Ridge Top: 0-10 W shifting E Trend and Timing: Weak east flow will develop tonight with the flow shifting back to westerly over the weekend.

Stevens Pass Mountain Weather Forecast

Day and Time: Monday 0800

Current Observations:

24hr Precipitation: 0    

Temperature profile: 28 base 

Pass level winds:  Light WNW

Barometer: 1018mbs as holding                

Sky: clear            

Radar:  Dry and clear over the mountains.

The Forecast:  Clear, cool and dry weather will settle over the PNW today.

Long Range: Dry and mostly clear weather with seasonally cool temperatures will persist through at least the upcoming weekend.

  

The Science:  A blocking ridge of high pressure will dominate the weather pattern for the next 7+ days.  A cold arctic air mass dropping into the intermountain west will create cold offshore flow for the PNW.  Watch for early morning freezing temperatures and gusty easterly winds tomorrow.  Temperatures trend warmer towards the end of the week.  Enjoy.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: 0 snow: 0 Tomorrow’s 24hr water:  0 snow: 0 Trend and Timing: 0

Temperature: Low: 24   High: 40 Freezing level: 4000’ -2000’ Trend and Timing:    Freezing levels will drop to 2000’ or lower tonight with good daytime temperature recovery tomorrow.

Winds Base:  0-5 NW shifting E Ridge Top: 0-10 WNW shifting E Trend and Timing: East / offshore flow will develop and strengthen over the next 24 hrs.

MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time: Thursday 0730

Current Observations:

24hr Precipitation: 0    

Temperature profile: 36 base 

Pass level winds: light westerly         

Barometer: 1027mb’s and holding            

Sky: Clear           

Radar: Clear east of the crest with high clouds to the west.

The Forecast:  Increasing clouds today with mixed rain and snow expected tomorrow.

Long Range: Dry and clear weather returns over the weekend with mostly dry but cooler weather for the upcoming week.   

  

The Science:  A triple point frontal system tracking north into BC will bring high clouds today with mixed snow and rain for the Cascades tomorrow.  Freezing levels will drop to +-4500’ tomorrow, so expect some snow mixed in with the rain at Pass level.  

High pressure, stationed off the PNW coast will strengthen and drift east over the weekend.  This will likely produce a blocking and offshore flow pattern for the PNW.  In other words, a prolonged dry period with seasonally average (cool) temperatures.   

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: lt .10 snow: 0 Tomorrow’s 24hr water: +.25  snow: 0 Trend and Timing: Light rain will begin late tonight with mixed rain and snow during the day tomorrow.

Temperature: Low: 36   High: 50 Freezing level: 7000’ – 5000’ Trend and Timing:    Warm today with cooling temperatures moving in tomorrow.

Winds Base: 0-10 W Ridge Top: 5-10 W Trend and Timing: Light westerlies today with come gusty ridge top winds expected tomorrow.

JM

MOUNTAIN WEATHER FORECAST

 

Stevens Pass Mountain Weather Forecast

Day and Time: Monday 0900

Current Observations:

24hr Precipitation: .92” of water, 8”of wet heavy snow at Pass level.

Temperature profile: 36 base, 32 ridge        

Pass level winds:  light and westerly

Barometer: 1018mb’s and rising                

Sky: Overcast                         

Radar: Heavy rain tracking SE through the Strait of Juan de Fuca with the snow level around 5000’.   Mostly dry east of the Cascade Crest.

The Forecast: Heavy rain with high mountain snow and wind can be expected this afternoon with freezing levels rising above 6000’.

Long Range: A drying trend begins tomorrow with the next chance of rain arriving on Friday.  

   

The Science: A strong moist warm front will move into the region today with heavy rain and high mountain snow.   Freezing levels will rise above 6000’ this afternoon and remain well above Pass level through the night.

The good news; high pressure will begin to build over the region starting tomorrow.  3 days of dry and sunny weather can be anticipated. 

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: 1-2” snow: 0 Tomorrow’s 24hr water: .25  snow: 0 Trend and Timing: Heavy rain will begin this afternoon and continue through the night.  Drying begins after 7am tomorrow morning.

Temperature: Low:  34  High: 50 Freezing level: 4500’ – 6500’ Trend and Timing:    Freezing levels are on the rise and could top out around 7000’ tonight.

Winds Base: 0-10 W Ridge Top: 10-20 W Trend and Timing: Gusty ridge top winds will begin to blow this afternoon with winds diminishing tomorrow afternoon.

MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time:  0800am

Current Observations:

24hr Precipitation:  .85” overnight, 1-3” of snow above 4500’

Temperature profile: 34base, 32 ridge

Pass level winds: 5mph average with 20+mph gusts

Barometer: 1009 mb’s and slowly rising

Sky:  OC

Radar: Gusty winds this morning with mixed rain and snow showers west of the Cascade Crest and tracking NE.

The Forecast:  Mixed rain and snow showers will persist through the weekend.  

Long Range:  The moisture will come to an end on Wednesday with dry and clearer weather expected for the remainder of the week.  Temperature will be seasonally normal (mid to upper 30’s)  

  

The Science: Cool unstable westerly flow has filled in behind the cold front that passed east of the crest last night.  The westerly flow will continue to drive disturbances into the mountains through at least Tuesday.   Snow levels seemed to have settled on the 4500/5000’ range for the weekend.

A high pressure system strengthening off of the California/Oregon coast will nudge its way north as the week progresses.  Wednesday through Friday should be fairly nice and mostly dry.  

Forecast confidence:  moderate.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .5-.75  snow: 3-5 above 4500’ Tomorrow’s 24hr water: .5  snow: 3-5” Trend and Timing: Moderate snow and rain showers will continue through the weekend.

Temperature: Low: 32  High: 36 Freezing level: +- 4500’ Trend and Timing:    Freezing levels will hover around 4500’ with some daytime warming expected.

Winds Base: 5-10 W Ridge Top: 5-15 Wsw Trend and Timing: Winds will slowly diminish today with westerly flow continuing through early Sunday morning.

MOUNTAIN WEATHER FORECAST

Stevens Pass Mountain Weather Forecast

Day and Time:  0700 Thursday

Current Observations:

24hr Precipitation:  .82” of water,

Temperature profile:  37 base

Pass level winds: moderate, westerly

Barometer: 1005mb’s and steady

Sky: OC

Radar:  Light precipitation falling in the mountains with heavy rain showers moving into the Puget Sound region  

The Forecast:  Moderate to heavy mixed rain and snow with falling temperatures will continue through the weekend.

Long Range:  The precipitation will continue through the middle of next week.

  

The Science: A seasonal westerly storm track is underway with several pulses of moisture poised to impact the PNW through the next 5-7 days.  Freezing levels will bounce between 4000’ and 6000’ as these systems move through.

There appears to be a break in the moisture next Thursday with a more active weather setting up for the following weekend.

Forecast confidence: Moderate to high.

Values from 4am today through

 4am tomorrow.

Precipitation: Today 24hr water: .75-1  snow: 1-3” Tomorrow’s 24hr water: .75-1  snow: 4-6 Trend and Timing: Moderate to heavy rain can be expected below 5000’ with the higher peaks getting a good dose of snow.

Temperature: Low: 32  High: 37 Freezing level:  6000’- 5000’ Trend and Timing:    Freezing levels will fall to +-5000’ late tonight with the snow level hovering around 4500’ tomorrow.

Winds Base: 5-10 W gusty Ridge Top: 10-20 W gusty Trend and Timing: Persistent moderate gusty westerly winds will continue.