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Showing posts from December, 2012

Start Time Tuesday---8am

Mountain Weather Forecast -Time: 1000

Dry conditions will prevail today as the barometric pressure continues to rise. Humidity’s should also begin to subside equating to thinning clouds and some clearing later today and tonight.

Long-term: The rest of the week will be dry under High pressure. Warm air will eventually find its way east by the middle of the week with freezing levels reaching 4500’ by Wednesday. No significant precipitation is expected until perhaps early next week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = 0 Snow equivalent = 0

Total inches of water by noon tomorrow =0
Total inches of snow by noon tomorrow = 0

Trend and Timing:
N/A

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 18 High: 26
Freezing level: 1000’ 3500’

Trend and Timing:
Freezing levels will slowly rise to near pass level tomorrow. However, cold air from the east will help keep the surface temperature below freezing.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 E
Ridge …

Start Time Monday---8am

Start Time Sunday---8am

Start Time Saturday---8am

Mountain Weather Forecast -Time: 0930

What a beautiful morning. Today will remain dry with high clouds thickening due to a weak system will dropping in from the north tonight. High pressure will strengthen tomorrow afternoon, setting up a prolonged dry period.

Long-term: This year will end and next year will begin with dry and clear weather. High pressure dominates the pattern for most of next week blocking and splitting any storms headed our way.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = <.25 Snow equivalent = 1-3

Total inches of water by noon tomorrow = .25
Total inches of snow by noon tomorrow = 2-4

Trend and Timing:
Light snow will develop after closing tonight. Snow will taper off afternoon tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 16 High: 24
Freezing level: +- 2500’

Trend and Timing:
Freezing levels will hover around 2500’ through the weekend. Clear conditions and cold air settling in the eastern basin could drop lows in the middle teens.

24hr …

Mountain Weather Forecast -Time: 0945

High humidity combined with a stabilizing atmosphere will produce light snow showers with sun breaks today and tomorrow.

Long-term: Other than a few light snow showers in the mountains, the weekend will be mostly dry as the pressure continues to increase. No significant storms are expected to make it to the Cascades until perhaps the middle of next week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am =<.25 Snow equivalent = 1-3

Total inches of water by noon tomorrow = .25
Total inches of snow by noon tomorrow = 2-4

Trend and Timing:
Light snow showers will continue to be possible for the next few days. No significant accumulation is expected.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 24 High: 28
Freezing level: +-3000

Trend and Timing:
The freezing level will continue its consistent height of about 3000’ through the weekend.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 WSW
Ridge Top: 5-10 W

Trend and Timing:

Start Time for Friday, Dec. 28th, 2012 is 8:00am

Start Time for Thurs. Dec. 27th,2012 is 8:00am

Mountain Weather Forecast - Time: 1030

Discussion: The radar is picking up just a few left over snow showers scattered about the State. The atmosphere will begin to stabilize as the barometric pressure rises. Sunshine with broken clouds tomorrow should make for a great day.

Long-term: Some more light snow is expected on Friday with the weekend looking mostly dry. High pressure ridge centered over the Inland Northwest will probably prevent any meaningful storms from making it to the mountains for the remainder of the year.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am =.10 Snow equivalent = 0-1

Total inches of water by noon tomorrow =.10
Total inches of snow by noon tomorrow = 1-2

Trend and Timing
Very light snow showers with clearing will continue through the tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 28
Freezing level: +- 2500

Trend and Timing:
The freezing levels will hover around the 2500’ level for the next few days. The sun could push surface temp…

NEW OPS PLAN - SAME AS THE OLD OPS PLAN

NOW THAT THE EAST SIDE IS OPEN, PLEASE DISREGARD THE SCHEDULE CHANGES OF YESTERDAY AND GO WITH YOUR 'REGULAR' SCHEDULE AS POSTED.  CALL DISPACTH IF YOU HAVE ANY QUESTIONS. 

CHEERS, CHRIS

The Plan for the rest of the week

We will staff day shift with east side patollers, and night shift will be staffed with summit dwellers and west side folks.  Expect phone calls and keep your eye on the bolg for updates.

Oh! and Merry Christmas everyone!!!

Mountain Weather Forecast -Time: 1015

The first of two frontal systems passed through this morning with the next front just about to hit the coast. The second front is weakening and directing most of its energy south of Stevens; therefore, the southern Cascades and the eastern slopes will get the majority of the snow today.

Long-term: High pressure builds off the western coast on Thursday. This is likely to block or split any storms trying to make it to the Pacific Northwest Mountains. The week is expected to end on the dry and possibly sunny side of things.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .25-.5 Snow equivalent = 4-6

Total inches of water by noon tomorrow = .5
Total inches of snow by noon tomorrow = 3-7

Trend and Timing:
The snow will be the heaviest between 10am and 4pm today. Once the front passes later today, the snow will change to light showers. Light snow showers will continue through the night and most of tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Toda…

Start Time for Weds. Dec. 26, 2012 is 8:00am

12/25 - No NIght Operations

There will be no night operations on 12/25.  A decision will be made tomorrow regarding night operations for 12/26.  Be sure to check the blog for current information.  There will be full day operations, eastsiders must ride bus (no charge).

Tomorrow Operations

Full Daytime Operations, Night to be decided later (check back after 6pm).  Eastsiders must ride bus at no charge.

Start Time Tuesday, Christmas---8am

Mountain Weather Forecast -Time: 1045

Well hopefully the sun will help release the snow from the trees today and make travel safer. Enjoy the sun today because tomorrow the snow returns.

Long-term: Light snow showers with periods of clearing will persist for the rest of the week. The weekend appears dry and sunny under building high pressure.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .10 Snow equivalent = 0-1

Total inches of water by noon tomorrow = <.25
Total inches of snow by noon tomorrow = 1-3

Trend and Timing:
The snow will arrive mid morning tomorrow and intensify through the afternoon. Snow will diminish to showers tomorrow night with light snow showers continuing Wednesday.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 16 High: 24
Freezing level: 3000’ 1500’

Trend and Timing:
Cool air arriving from the NE will push freezing levels low on the east slope of the cascades. West of the summit temperatures will be a few degrees warmer.

24hr Winds Speed (mph)/Dire…

Start Time Monday---8am

Mountain Weather Forecast - Time: 0900

The low pressure system that was sitting off the coast for the past few days will move east of the mountain today. The snow showers, concentrated on the eastern slopes of the Cascades, will diminish as a high pressure ridge prepares to move over the region tomorrow. Sun breaks and cooling can be expected to start the holiday week.

Long-term: The next organized storm will impact the area on Christmas day bringing more snow to the mountains. Snow will be likely Tuesday and Wednesday with the end of the week looking dry for now.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .25 Snow equivalent = 2-4

Total inches of water by noon tomorrow = +.25
Total inches of snow by noon tomorrow = 2-4

Trend and Timing:
Scattered snow showers will continue today and then taper off through the night. Except for a few snow showers hanging around, tomorrow will be mostly dry with sunshine.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 26
Freezing…

HIGHWAY OPEN AT 6:30AM

THE DOT WILL LET STEVENS EMPLOYEE'S UP AT 6:30 AM SUNDAY MORNING.  THE 6:20 AM BUS WILL ALSO BE GOING UP.  BRING YOU EMPLOYEE ID TO GET THROUGH THE ROAD BLOCK.  GOOD LUCK.

Start Time Sunday---8am

Start Time Saturday---8am

Start Time Friday---8:00am

Mountain Weather Forecast -Time: 0945

The skiing just gets better and better. I am sure the snowboarding is epic too. Snow will continue this morning and then begin to taper off tonight. Intermittent snow showers with sun breaks are on the docket for tomorrow.

Long-term: The low pressure system parked off the PNW coast will spin bands of snow showers into the mountains for the next 2-4 days. Next week starts out dry under building high pressure with another storm of interest arriving mid week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = < .25 Snow equivalent = 1-3

Total inches of water by noon tomorrow = .25
Total inches of snow by noon tomorrow = 2-4

Trend and Timing:
Snow will diminish to light snow showers today. Clearing will be possible tonight with more snow showers tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 20 High: 26
Freezing level: 3500’ - 2500’

Trend and Timing:
Freezing levels stabilize between 2500’ and 3500’ through the weekend.

24hr Winds S…

Mountain Weather Forecast -Time: 1045

The next frontal system has arrived with snow intensifying through the day. This storm has a southwest orientation so watch for the freezing levels to rise with the passing of the front later today. A cold front will follow tonight dropping temperatures and changing the snow to showers tomorrow.

Long-term: The low pressure system sliding down the coast will weaken and stay off shore through the week. After today’s initial assault, weak bands of snow showers with dry periods will persist through the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .75 Snow equivalent =8-10

Total inches of water by noon tomorrow = .75-1
Total inches of snow by noon tomorrow = 10-14”

Trend and Timing:
Snow will be heaviest this afternoon and evening and then begin to subside after midnight. Light scattered snow showers will continue tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 20 High: 30
Freezing level: 1500’ 3500’

Trend and Timing:
Fr…

Start time for Thurs. 12/20/12 is 6:15am

Start Time Wednesday---8am

Dog Training

Mountain Weather Forecast -Time: 1000

Discussion: The skiing is pretty darn good this morning. These moderate snow showers will become less frequent as the day progresses. A warm front arrives early tomorrow with more snow and rising freezing levels.

Long-term: A low pressure system tracking south from the Gulf of Alaska will spin bands of moisture (snow) into the Cascades Mountains for the rest of the week. The models have this system staying off shore and continuing south. This could equate to a relatively quiet weekend of weather ahead.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = >.25 Snow equivalent = 1-3

Total inches of water by noon tomorrow = +.25
Total inches of snow by noon tomorrow = 3-5

Trend and Timing:
The snow will diminish through the day. Tonight will be mostly dry with snow developing after 4am tomorrow morning. Snow will intensify tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 26
Freezing level: 1500’ 3500’

Trend and Timing:
Freez…

Weather Update

It appears that the convergence zone will remain active through the night.  This will likely increase the 24hrs snow totals.  

We received the forecasted 2" of water (22" of snow) during the previous 24hr run and it is still coming down hard.

Let it snow, let it snow, let it snow.

Start Time Tuesday---6:15am

Mountain Weather Forecast -Time: 0930

Discussion: Heavy snow will continue this morning courtesy of the Puget Sound Convergence Zone. Temperatures will also cool off today as cold air fills in behind this storm.

Long-term: Another system arrives on Wednesday with more snow and rising temperatures. Snow showers are expected to continue for the remainder of the week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am =.5 Snow equivalent = 4-8

Total inches of water by noon tomorrow = .5 +
Total inches of snow by noon tomorrow = 5-8

Trend and Timing:
The snow will remain intense through mid afternoon. Snow will change to showers later today and begin to taper off through the night.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 30
Freezing level: 3500’ 1500’

Trend and Timing:
Freezing levels will drop throughout the day today. Temperatures will remain in the low 20’s tomorrow with a warming trend beginning on Wednesday.

24hr Winds Speed (mph)/Direction Starting at Noon Today…

Start Time Monday---6:15 a m

Mountain Weather Forecast -Time: 0845

Discussion: Round two. The next aggressive front is still on schedule to bring heavy snow and high winds to the mountains tonight and tomorrow.

Long-term: Cold NW flow will keep snow falling in the mountains through first part of the week. Freezing levels may be as low as sea level by Tuesday.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = +-1.5 Snow equivalent = 10-14

Total inches of water by noon tomorrow = 2”
Total inches of snow by noon tomorrow = 12-24”

Trend and Timing:
Snow will intensify through the day. The Puget Sound Convergence Zone will likely enhance the snow fall rates during the early morning hours.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 24 High: 30
Freezing level: 2000’ 3500’

Trend and Timing:
Freezing levels will spike up tonight and then fall back down early tomorrow morning.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-10 E shifting W and strengthening
Ridge Top: 5-15 E shifting W

Trend…

Start Time Sunday---6:15am

Mountain Weather Forecast - Time: 0845

Discussion: As advertised, two progressively stronger Pacific storms will begin to affect the Cascade Mountains today. This morning’s radar shows the leading edge of the precipitation just about to reach the mountains.

Long-term: Heavy snow is expected to continue through Monday.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .5-.75 Snow equivalent = 6-10

Total inches of water by noon tomorrow = +.75
Total inches of snow by noon tomorrow = 8-12

Trend and Timing:
The snow will intensify through the day with convergence conditions setting up late tonight or early tomorrow morning. There will be a very short break tomorrow morning with the next front hitting mid day. Another +1” of water is expected by early Monday morning.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 20 High: 26
Freezing level: 1500’ 2500’

Trend and Timing:
The first front is a warm front, so expect temperatures to rise as the front passes. Freezing levels will remain w…

Start Time Saturday---8am

Mountain Weather Forecast -Time: 1045

Discussion: Today and tonight will be mostly dry with a few brief snow showers likely. The snow machine will crank up tomorrow as two frontal systems prepare to hit the PNW over the weekend. The first wave of is expected to hit tomorrow afternoon with the bigger of the two arriving on Sunday/Monday.

Long-term: Storm totals from Saturday noon to 4am Monday are currently calculating out to be in the neighborhood of 1.5-2.5” of water or 15-24” of snow. Long range models disagree on what is to come beyond Monday, so I will leave that for following model runs.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am =>.25 Snow equivalent = 0-2

Total inches of water by noon tomorrow = .25
Total inches of snow by noon tomorrow = 1-3

Trend and Timing:
Some light snow showers are expected today with little snow accumulation expected. Snow will increase tomorrow afternoon.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low:16 High:
Freezing level: 1500’ -2000’

Start Time for Friday Dec. 14th, 2012 is 8:00am

El Nino Watch

I just read over the Dec 6th El Nino discussion from the International Climate Prediction Center:

If you want the whole discussion go to:
http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.pdf

The one sentence that means the most to us is - …it is considered unlikely that a fully coupled El NiƱo will develop during the next several months. ENSO-neutral is now favored through the Northern Hemisphere winter 2012-13 and into spring 2013.

Summary: The PNW will have a “normal” winter with average temperature and average amounts of precipitation. Normal has been pretty good so far.

JDM

Mountain Weather Forecast -Time: 0900

Discussion: It was lovely to see the mountains all lit up by the morning sun. Radar shows a frontal band of moisture just off shore this morning. This system is expected to weaken and possible split as it moves inland and thus will not likely be a significant snow producer for the mountains.

Long-term: Two stronger storms are lining up to hit the PNW over the weekend, one Saturday night and then again on Sunday. The long range models show the jet stream shifting south next week. We will have to wait and see what this does to the general storm track, but it could lead systems south and away from the PNW. In the mean time, enjoy the snow this weekend and early next week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = <.25 Snow equivalent =1-3

Total inches of water by noon tomorrow = +.25
Total inches of snow by noon tomorrow =3-5

Trend and Timing:
Snow will arrive after 4pm tonight. Light snow will continue to fall tomorrow.

24hr Base Area Temperature…

Mountain Weather Forecast -Time: 0845

Discussion: Light snow showers and falling temperatures will be on the menu today. Tomorrow will be mostly dry with the next storm arriving after closing.

Long-term: NW flow will keep the storm track aimed at the PNW through the weekend. The Pass should have a more fresh snow on Friday morning (similar to this morning) with another system setting up to bring more snow on the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .10 Snow equivalent = 0-2

Total inches of water by noon tomorrow = .10
Total inches of snow by noon tomorrow = 0-2

Trend and Timing:
These light snow showers will dry up today. Tonight will be dry with the next wave of moisture arriving in the mountains tomorrow night.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 26
Freezing level: 3000’ 1500’

Trend and Timing:
Freezing levels will fall tonight and with surface temperatures remaining well below freezing.

24hr Winds Speed (mph)/Direction Starting at…

Start Time Wednesday---8am

Mountain Weather Forecast -Time: 0945

Discussion: A cold front dropping in from the BC coast will bring more snow to Stevens Pass today. Light snow showers are expected tonight and tomorrow.

Long-term: Another nice looking system arrives on Thursday/Friday with yet another on Saturday/Sunday. The NW jet stream continues to direct winter storms at PNW for the long term. I am still betting on over 100” base by Christmas.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .5 Snow equivalent = 4-6

Total inches of water by noon tomorrow = +.5
Total inches of snow by noon tomorrow = 4-8

Trend and Timing:
Snow should arrive anytime now. The heaviest snow will be this afternoon with a short lived and weak convergence period. Light snow showers develop behind the front tonight.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 24 High: 30
Freezing level: 3500’ 2500’

Trend and Timing:
Cold NW flow aloft will keep freezing levels well below 4000’ for most of the week.

24hr Winds Speed (mph)/…

The Puget Sound Convergence.

Image
Last week’s epic snow was due to the position of Stevens Pass, to the Puget Sound Convergence Zone. When the wind hits the northern coast of Washington directly from the west, it splits around the Olympic Mountains and “converges” over Puget Sound. Just like water flowing around a rock, it eddies directly behind the mountain (Sequim Wa. the driest place in western Wa) and accelerates on it edges. The Hwy 2 /river gorge network is positioned perfectly to augment the acceleration. The wind and precipitation get shoved up through the Pass where temperatures and orographics are enhanced.
Wind direction is the feature to look for for the development of the convergence zone.If the winds hit the Olympic Mountains straight from the west, Stevens Pass will achieve convergence conditions. If they come from the NW, then Snoqualmie gets the convergence.    You can see below the winds "bending" around the mountains.

Mountain Weather Forecast - Time: 1000

Discussion: These light snow showers will decrease this afternoon as weak high pressure builds over the region. Tonight will be dry with more light snow possible tomorrow afternoon.

Long-term: Wednesday through Friday will be dry and chilly with more storms likely on the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = >.25 Snow equivalent = 1-3

Total inches of water by noon tomorrow = .25
Total inches of snow by noon tomorrow = 1-3

Trend and Timing:
Radar shows just some light snow showers along the Cascade Crest. Another band of snow will move through tomorrow afternoon.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 24 High:30
Freezing level: +-3500’

Trend and Timing:
Freezing levels will hover between 3000’ and 4000’ through tomorrow. Temperatures will slowly fall for the next few days.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 W
Ridge Top: 5-15 W

Trend and Timing:
Westerly flow will continue toda…

Start TIme for Tues. Dec. 11th, 2012 is 8:00am

Start Time Monday---8am

Mountain Weather Forecast - Time: 0945

Discussion: A warm front followed by a cold front will produce snow and rising freezing levels today. The precipitation will change to showers once the cold front passes the Cascade Crest tonight.

Long-term: Tuesday and Wednesday will be snowy with a switch to light snow showers and some possible sunshine wrapping up the week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = +.25 Snow equivalent = 2-5

Total inches of water by noon tomorrow = .25-.5
Total inches of snow by noon tomorrow = 3-6

Trend and Timing:
The snow will become wet as the temperature rises through the day. The precipitation will change to light showers with the passing of the cold front late today with some clearing tonight.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 26 High: 32
Freezing level: 3000’ 4500’ 2500’

Trend and Timing:
Freezing levels will rise this afternoon and then gradually lower through the night.

24hr Winds Speed (mph)/Direction Starting at Noon Toda…

Start Time Sunday---8am

Whew, what a start

Image
The 30 year average snow fall for Stevens Pass from Thanksgiving to Christmas is +- 82” Snow pack by Christmas averages around 50”. As you all are aware, we are well above that average. I remember only one year where we had a 100” base going in the Holiday period. I think that was 99/2000 or 01. “The big year”

There is nothing in the long term weather models that indicate that we will not reach a 100” of snow at the base by Christmas. We have already surpassed 100” on the upper mountain.    100" party anyone?

The  300mb jet stream forecast model keep it on a northern projectory through next week. This should continue bringing winter storms through the PNW for the extended period.






GOT CONVERGENCE

Mountain Weather Forecast -Time: 0900

Holy cow, the GFS models and all of us weather forecasters certainly underestimated what the Puget Sound Convergence Zone is capable of. This morning’s radar shows the convergence zone with plenty of water left in it. Therefore, expect the snow to continue for a few more hours, if not for the rest of the day. High pressure is rising off of the coast, so the precipitation will eventually run out this evening.

Long-term: Now to make things interesting. Tomorrow, a warm front will cause freezing levels to rise, and provide some light snow and maybe a little rain in the base area. Yikes. Let’s hope the models have this wrong too. Cool NW flow returns on Monday with more storms lined up for the middle of next week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .25 Snow equivalent = 2-5

Total inches of water by noon tomorrow = .25 +
Total inches of snow by noon tomorrow = 3-5

Trend and Timing:
Models have the moisture in…

Start Time for Sat. Dec 8th, is 6:15am!!!

Mountain Weather Forecast - Time: 1130

Discussion: The leading edge of the approaching cold front is expected to move past the Cascade Crest in a few hours. Once the front passes, the snow will diminish to occasional showers. The wind will also decrease and shift NW with the passing of the front.

Long-term: Weak high pressure will produce snow showers with sun breaks tomorrow. Another front arrives on Sunday with warming and more precipitation.

24hr Accumulative Precipitation Totals Starting at Noon Today:

Water by 4am = .25 -.5 Snow equivalent = 3-6

Total inches of water by noon tomorrow = .5
Total inches of snow by noon tomorrow = 5-8

Trend and Timing:
Moderate to heavy snow will continue for the rest of the day. Snow will change to showers tonight with scattered snow showers continuing tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 18 High: 24
Freezing level: 3000’ 1000’

Trend and Timing:
Temperatures will fall this afternoon in the wake of the cold front. Freezing levels will remain low thro…
START TIME:  6:15

FIRST DAY OF CONTROL - WOOT WOOT!!!

Mountain Weather Forecast - Time: 0900

Discussion: Snow today. Northwest flow will keep the snow falling in the mountains through tomorrow.

Long-term: High pressure building off the coast will provide drier and warmer weather for the Washington mountains on the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:

Water by 4am = + .5 -.75       Snow equivalent = 8-12”

Total inches of water by noon tomorrow = +.75 -1
Total inches of snow by noon tomorrow = 10-15”

Trend and Timing:
We should get the forecasted 5-8” of snow by noon today. Snow will intensify today powered by the Puget Sound Convergence Zone.

24hr Base Area Temperatures (F) Starting at Noon Today:

Low: 24 High: 30
Freezing level: 3000’ 1500’

Trend and Timing:
Freezing levels will continue their descent through the next 24 hrs.

24hr Winds Speed (mph)/Direction Starting at Noon Today:

Base: 5-10 W
Ridge Top: 10-20 W Gusty.

Trend and Timing:
Steady moderate westerly winds will continue through tomorrow.









Start Time for Thurs. Dec. 6th is 8:00am

NW Flow

Image
The northern jet stream finally shifting north for the first offical northwest flow of the season.     



A nice looking stream of moisture feeding in as well.

Mountain Weather Forecast - Time: 0900

Weak high pressure aloft will bring light snow showers and sun breaks today. Snow will return tonight and continue through tomorrow. It should be some brilliant sliding tomorrow.

Long-term: The week will end snowy and windy under cool northwest flow. Long range models have high pressure building off the coast on Friday. This will likely cause dry and warmer weather for the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .25+ Snow equivalent = 2-5

Total inches of water by noon tomorrow = +.5
Total inches of snow by noon tomorrow = 5-8

Trend and Timing:
Snow is expected to ramp up after closing tonight. Moderate snow will continue through the day tomorrow.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 22 High: 28
Freezing level: +- 2500’

Trend and Timing:
Freezing levels will fall to 2500’ tonight and stay low through the end of the week.

24hr Winds Speed (mph)/Direction Starting at Noon Today
Base: 5-10 W
Ridge Top: 5-15 W

Start Time Wednesday---8am

Opening more terrain over the next couple of days. Watch for isolated areas of instability as we build a Maritime snow pack on a Continental one.

Mountain Weather Forecast - Time: 1200

A cold front will move over the mountains around noon today. Once this occurs, temperatures will begin to fall. Light snow showers with increasing winds will be the main weather event tonight and tomorrow.

Long-term: Cool NW flow will begin on Thursday with snow showers persisting through the end of the week. The weekend appears to be mainly dry and cold.

Note: The format has changed under 24hr precipitation. Let me know if you have questions.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am= + .25   Snow equivalent = 2-4”

Total inches of water by noon tomorrow = < .5

Total inches of snow by noon tomorrow = 3-5”

Trend and Timing:
Mixed snow and rain will gradually diminish to light showers through the night. Mostly dry with some light snow showers are expected for most of the day tomorrow.


24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 24 High: 34
Freezing level: 5000’ 3000’

Trend and Timing:
Temperatures will gradually decrease through…

Start Time Tuesday---8am

Thanks Ryan for letting the crowd take advantage of the new snow...SICK day. Snowpack is changing rapidly. Upper 3rd of the mountain still a faceted crust with settlement cracks and woomfing, snow above not slab structure and no energy at this time. The Seahawks hat is now not for sale.

Mountain Weather Forecast -Time:1130

It is gratifying to see the Pacific NW snow machine all cranked up. The steady snow will decrease to intermittent showers this afternoon with temperatures on the rise. Another round of mixed rain and snow begins early tomorrow morning.

Long-term: A high pressure ridge passes over on Wednesday for a short dry period. The jet stream shifts to a NW flow pattern on Thursday, this should produce cooler temperatures and more snow for the weekend.

24hr Accumulative Precipitation Totals Starting at Noon Today:
“Water by midnight= >.25
“Of additional water by 4am=.25
“Of additional water by 12pm= .25

24hr (12pm-12pm) Inches of Water = +- .75

24hr (12pm-12pm) Inches of Snow = 1-3” lower mountain, 3-8” upper mountain.

Trend and Timing:
The snow will let up this afternoon for just intermittent showers for the remainder of the day. The next round of precipitation will reach us early tomorrow morning with mixed rain and snow likely through the day.

24hr Base Area Temperatures (F) Starting at…

Start Time Monday---8am

Sunday Morning Mountain Weather Discussion

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Even though the front has moved east, a cooling, unstable atmosphere, coupled with the Puget Sound Convergence Zone should keep snow falling through the day. An additional 4-6” should be added to the 5” that fell last night.
All of this should make for some great alpine recreating for the next few days.

You can see the trailing edege of the front now heading into eastern Wa. 


Strong westerly flow has set up the Puget Sound Convergence Zone nicely.


Cool unstable atmosphere filling in behind the front.

Start Time Sunday 8am