8:00 START FRIDAY, APRIL 1. NO ABS! CHEERS!

8am Start Thursday March 31. No ABS

MOUNTAIN WEATHER FORECAST

Time and Day: 0700 Wednesday

The Snapshot:  Warm and sunny weather will continue for the remainder of the week.

The Science:  The blocking high pressure system centered offshore will drift east today bringing even warmer weather to the mountains. Temperatures remained above freezing this morning and will peak near 50^0f  today.     

The Long Range:  Long range models are now keeping the PNW dry and mostly clear continue through the weekend, with a chance of rain early next week.

Precipitation Ending at 4am: Today 24hr water = 0 Snow = 0 Tomorrow’s 24hr water = 0 snow = 0 Trend and Timing: 0

24hr temperature ending at 4 am tomorrow:                                        Low: 34    High: 50 Freezing level: + 8000.' Trend and Timing:    Freezing levels will continue their ascent today reaching +8000’.

24hr Winds (mph) ending at 4 am tomorrow: Base: 0-5 E Ridge Top: 0-5 E Trend and Timing: Light, almost indictable east winds today.

jM

8:00 start Wed Mar 30th no abs

MOUNTAIN WEATHER FORECAST

Time and Day:  0700 Tuesday

The Snapshot:  Clear skies with warm springtime temperature will grace the PNW for the remainder of the week.  Light rain for the weekend.

The Science:  The atmosphere over the most of the state has stabilized under a rising barometer.  Satellite imagery shows clear skies over the entire state.  Early morning temperatures have dropped below freezing this morning but will quickly climb into the upper 40’s as the sun begins to take effect.  The air mass will warm even further tomorrow with early morning temperatures struggling to drop below freezing.     

The Long Range:   Clear and warm weather will persist for the rest of the week.  Long-range models have the high pressure breaking down and drifting east on Saturday.  This may allow some rain to enter the scene over the weekend.

Precipitation Ending at 4am: Today 24hr water =  0 Snow =0 Tomorrow’s 24hr water = 0 snow = 0 Trend and Timing: 0

24hr temperature ending at 4 am tomorrow:                                        Low: 28     High:  44 Freezing level: 5000’  -  7000’ Trend and Timing:    High temperatures will rise a few degrees each day.

24hr Winds (mph) ending at 4 am tomorrow: Base: 5-10 E   Ridge Top: 5-10 E Trend and Timing: East /offshore flow will be the wind pattern today with some gusty periods possible.

jM

8:00 start Mon Mar 29th no abs

MOUNTAIN WEATHER FORECAST

Time and Day: 0800 Monday

The Snapshot:  Scattered snow showers this morning with dry, sunny and warmer weather developing tomorrow.

The Science: This morning’s satellite imagery has some light snow showers popping up in the mountains with clear skies to the west.  Skies will begin to clear this afternoon as high-pressure building over region starts to take effect. 

The Long Range:  High pressure will strengthen as the week progresses with dry, warm, and clear weather expected for the next 5-7 days.

Precipitation Ending at 4am: Today 24hr water = .10  Snow = trace Tomorrow’s 24hr water =  0 snow = 0 Trend and Timing: Snow showers will taper off this morning.  Dry for the rest of the week.

24hr temperature ending at 4 am tomorrow:                                        Low:  30   High: 38 Freezing level: 3500’ – 5000.' Trend and Timing:    Freezing levels will begin to rise today and will remain well above Pass level for the week.  Good early morning cooling will occur with temperatures dropping just below freezing for the next few days.

24hr Winds (mph) ending at 4 am tomorrow: Base: 0- 5 NNE Ridge Top:  5-10 N Trend and Timing: Winds will swing north then east through the next 24hrs.

jM

8:00 start Monday March 28, no ABS

Convergence was shorter lived then expected and seems to have moved south of us. Maybe an 8:00 start will ensure more snow :)

-253

MOUNTAIN WEATHER FORECAST

Time and Day: 0630  Sunday

The Snapshot:   Just another late March powder day.  Windy with moderate to heavy snow showers today.  Snow ends tomorrow with dry and clear weather developing.   Enjoy the snow while it lasts.

The Science:  A cold front passed east of the crest around 2 am this morning with the good westerly flow just now starting to strengthen.  The Puget Sound Convergence Zone is expected to set up this morning keeping the snow showers moving through Stevens Pass for most of the day.  Ridge top winds will also strengthen but shouldn’t be a show-stopper.  The precipitation will taper off tomorrow as high pressure begins to build.

The Long Range:  The PNW will begin to dry (melt) out next week.  Daytime temperatures could reach into the 50’s with abundant sunshine by the middle of the week.  Seattle temperatures could touch 70 by the end of the week.

Precipitation Ending at 4am: Today 24hr water = .75 -1   Snow = 8-10 Tomorrow’s 24hr water =  .25 snow = 2-4 Trend and Timing: The convergence zone will point towards Stevens this morning and then shift south toward Snoqualmie later today.  Showers persist through the night.

24hr temperature ending at 4 am tomorrow:                                        Low: 28    High: 32 Freezing level: +- 3500’ Trend and Timing:    Freezing levels will fall to around 3000’ through the day.  A warmer air mass begins to invade tomorrow.

24hr Winds (mph) ending at 4 am tomorrow: Base:  5-10 W gusty Ridge Top: 10-15 W  gust Trend and Timing: Westerly flow will persist this morning and then begin to diminish this evening.

jM

8:00 Start Sun Mar 27th no abs

MOUNTAIN WEATHER FORECAST

Time and Day: 0730 Saturday

The Snapshot:  High clouds, warm and dry today, mixed rain and snow developing tonight changing to snow tomorrow.  A good dose of Spring arrives next week.

The Science:  The high cloud deck this morning will clear for some nice sunshine later today.  A cold front with NW flow in tow will move in late tonight for another round of snow showers for Stevens Pass.  The precipitation will likely start out as light rain tonight as it mixes with the lingering warm air mass.  Temperatures will fall in the wake of the front with cool westerly flow providing snow showers for most of the day tomorrow.  Gusty ridge top winds will also accompany the front tomorrow morning, but they should be fairly short lived.

The Long Range: Snow showers will linger into Monday with a drying trend beginning Monday afternoon.   A strong high-pressure system will bring warm, dry and clear weather to the PNW starting on Tuesday and will likely last through the upcoming weekend.

Precipitation Ending at 4am: Today 24hr water = .25  Snow = 0-2 Tomorrow’s 24hr water = .5-.75 snow =  6-8 Trend and Timing: Light rain turning to snow will begin after 7 pm tonight.  Snow showers will persist into Monday morning.

24hr temperature ending at 4 am tomorrow:                                        Low: 30    High: 45 Freezing level: 7000’ – 4500.' Trend and Timing:    Temperatures will quickly climb into the upper 40’s today or even touch 50 with the aid of the sun.  Freezing levels will fall to or just below Pass level after 4 am tomorrow morning.

24hr Winds (mph) ending at 4 am tomorrow: Base: 0-5 SW Ridge Top: 0-10 SSW Trend and Timing: Southerly flow aloft will shift north-westerly tomorrow morning.  Gusty winds will accompany the front, but are not expected to last very long.

jM

8:00am Start Saturday March 26 NO ABS

HAPPY BIRTHDAY ANGELA!!!!!

MOUNTAIN WEATHER FORECAST

Time and Day:  1000 Friday

The Snapshot:  POWDER DAY!  Snow showers will taper off today with partial clearing this afternoon.  Tomorrow will be mostly dry and warm with some sunshine.   More snow is expected early Sunday morning.

The Science:  Stevens Pass broke 400” of snow fall for the season this morning – Thank you, El Nino.  An upper-level high-pressure ridge along with the convergence zone shifting south will bring and end to the snow today.  Tomorrow will start out clear with increasing clouds through the day.   A cold front will push through late tomorrow night with more snow expected on Sunday.      

The Long Range:  All of next week will be dry, sunny and warm as a strong high system parks itself over the PNW. 

Precipitation Ending at 4am: Today 24hr water = .10   Snow = 0-2 Tomorrow’s 24hr water = .25 snow = 2-4 Trend and Timing: Snow showers will taper off this morning with little to no additional accumulation expected through tomorrow.

24hr temperature ending at 4 am tomorrow:                                        Low:  24   High: 45 Freezing level: +-4500.' Trend and Timing:    Surface temperatures will climb into the 40’s today with cool early morning temperatures tomorrow.

24hr Winds (mph) ending at 4 am tomorrow: Base: 0-5 W   Ridge Top: 5-10 W Trend and Timing: Winds will diminish today but remain mostly westerly through the night.

jM

6:15 Start Friday March 25

57 MPH max winds at C7 this morning made for a sporty day. Hopefully they die down and we get some good skiing in tomorrow. ABS.

-253

MOUNTAIN WEATHER FORECAST

Time and Day: 1000 Thursday

The Snapshot:  Windy with snow showers today.  Tomorrow and Saturday will be mostly dry.   More snow expected Saturday night into Sunday.  Spring gets serious next week.

The Science:  The Puget Sound Convergence Zone is in full effect with moderate to heavy snow showers expected through the day.   Snow tapers off with some clearing early tomorrow morning as an upper-level ridge passes through.  Tomorrow and most of Saturday will be dry and partly cloudy.   

The Long Range:  A similar snow event as today will arrive Saturday night for some additional snow heading into Sunday.   Next week will be mostly dry and warmer as a strong high-pressure cell builds over the PNW.

Precipitation Ending at 4am: Today 24hr water = .75 -1  Snow = 8-12 Tomorrow’s 24hr water = <.25 snow = 1-3 Trend and Timing: Snow showers will continue today and begin to taper off after 4 am tomorrow morning.

24hr temperature ending at 4 am tomorrow:                                        Low:  24   High: 34 Freezing level: +- 3500’ Trend and Timing:    Freezing levels will hover around 3500’ through tomorrow.   Daytime temperatures will likely climb into the mid to lower 30’s.

24hr Winds (mph) ending at 4 am tomorrow: Base:  5-15 W Ridge Top: 5-20 W Trend and Timing:  Ridge top winds will remain gusty today with Pass level winds diminishing this afternoon.

jM

6:15 Start Thursday March 24

Get it while it's hot (cold), March powder skiing the next few days!

-253

MOUNTAIN WEATHER FORECAST

Time and Day: 0800 Wednesday

The Snapshot:  Light snow showers with sun breaks today, increasing mixed rain and snow tonight with snow increasing tomorrow.   Potential powder day on Friday.

The Science: A low-pressure system developing in the Gulf of Alaska will drive a warm front followed by a cold front into the PNW starting tonight.  Freezing levels will spike up (+-5000’) in the wake of the warm front tonight but, cool westerly flow will fill in behind the cold front tomorrow.   Therefore, expected mixed rain and snow tonight with snow intensifying tomorrow.  The Puget Sound Convergence Zone is expected to develop which will bring periods of heavy snow and wind to Stevens Pass tomorrow.  

At the moment, storm totals by Friday noon exceed 1.5” of water and or 10-15” of snow; those values will be refined later today.  

The Long Range:  Saturday will be mostly dry with sun breaks with more snow on Sunday. 

Precipitation Ending at 4am: Today 24hr water = .5 Snow = 2-4 Tomorrow’s 24hr water = 1 snow = 8-10 Trend and Timing: Lights rain and snow showers today, snow tomorrow.

24hr temperature ending at 4 am tomorrow:                                        Low: 28    High: 36 Freezing level: 5000’ – 3500.' Trend and Timing:    Freezing levels will spike to near 5000’ tonight and then fall early tomorrow morning.

24hr Winds (mph) ending at 4 am tomorrow: Base: 0-5 W  gusty Ridge Top: 5-15 W gusty Trend and Timing: Winds will be light today.   Westerly flow increases tonight with high ridge top winds expected.  Convergence flow will bring a windy day tomorrow.

jM

8:00 Start Wed Mar 23rd no abs

MOUNTAIN WEATHER FORECAST

Time and Day: 0730 Tuesday

The Snapshot:  Snow showers today and tomorrow with some clearing.

The Science:  3” of snow fell overnight.  Snow showers will continue today under cool westerly flow.   A weak upper-level ridge will allow some clear periods to form through most of tomorrow.   A strong frontal system will move in tomorrow night with moderate mixed rain and snow changing to snow.  Snow will continue under steady NW flow to finish out the week.  I guess winter isn’t done quite yet.

The Long Range:  High pressure is expected to build the NW coast over the weekend.  However, models diverge on how this will affect the region.   

Precipitation Ending at 4am: Today 24hr water = .25 Snow = 2-4 Tomorrow’s 24hr water = .5-.75 snow = 3-5 Trend and Timing: Light snow showers through most of tomorrow.

24hr temperature ending at 4 am tomorrow:                                        Low:  28   High: 34 Freezing level: +- 4500’ Trend and Timing:    4500’ freezing levels with daytime warming will continue until Thursday morning.

24hr Winds (mph) ending at 4 am tomorrow: Base: 0-10 W Ridge Top: 5-15 W Trend and Timing:  Gusty westerly ridge top winds will also continue for the next 24hrs

jM

8:00am Start Time Tuesday, March 22 No ABS

MOUNTAIN WEATHER FORECAST

Time and Day: 0730 Monday

The Snapshot:  Light mixed snow and rain today and tomorrow. 

The Science:   A low-pressure trough approaching the PNW today will bring cool SW flow with mixed rain and snow showers today and tomorrow.   Most of the moisture will be confined to the western slopes of the Cascades with light showers east of the crest.  Cool air aloft will bring freezing levels down to around 4500’ with a general cooling trend as the week progresses.  

The Long Range:  This typical early spring weather pattern of spotty mixed rain and snow showers and periods of broken clouds will continue through the week. 

Precipitation Ending at 4am: Today 24hr water = .5 Snow = 2-4 Tomorrow’s 24hr water = .25 snow = 1-3 Trend and Timing: Light rain showers today with mixed snow tonight.

24hr temperature ending at 4 am tomorrow:                                        Low:  28   High: 36 Freezing level: +- 4500’ Trend and Timing:    Freezing levels will fluctuate around 4500’ with a general cooling trend through the week.

24hr Winds (mph) ending at 4 am tomorrow: Base: 0-5 E shifting W Ridge Top:  5-10 WSW Trend and Timing: East flow will briefly develop today, and then winds will shift westerly tonight.

jM