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MOUNTAIN WEATHER FORECAST

Time and Day: 0700
The Snapshot: Snow and wind tapering off today.Cold, dry and sunshine will dominate the weather pattern through at least Wednesday.Snow and warmer temperatures enter the scene late next week.
The Science
Current Observations: What astorm.1.45” of water produce 20” of snow over the last 24hrs, 5” of that fell overnight.Winds hit a high speed of 72mph yesterday and remained fairly consistent through the night.The temperatures profile is 17 base / 15 ridges.The barometer dropped to 998mb’s but is now on its way up.
The Forecast: The low-pressure system that brought us yesterdays intense weather will drift south today.This will pull in cold, dry arctic air through the Frazer River Gap.Temperatures are likely to drop to the single digits over the next few days with no precipitation allowed in. The winds will diminish and shift north then east today.The sunshine will be the saving grace with clearing underway.
The Long Range:A weak system will try and make its way through …

6:15 ABS Sunday the 18th

Backside closed at 1:15 today due to wind. Hiking routes closed about the same time after no traffic. Good results up to 24" this morning on ridgetops, 4-10" everywhere else.

MOUNTAIN WEATHER FORECAST

Time and Day: 0530 Saturday
The Snapshot:Lots oh snow, then dry and cold.
The Science
Current Observations: After Jack’s predicted lull last night the snow has picked back up again this morning. The temperatures peaked around 32 around 5 pm yesterday and are holding steady just below freezing. (31 base / 27 ridges).The barometer has dropped to 1010mb’s and the winds are gusting 5-10 out of the west.
The Forecast: The second wave of heavy moisture associated with the passing low-pressure system will bring heavy snow and gusty winds to Stevens Pass today. The precipitation will begin to taper off tomorrow morning as the cold dry airmass from the north begins to filter in.
The Long Range:The weather topic for the most of next week will be the fidget temperatures.Single digits lows are expected early Monday morning with the cold dry weather is expected to persist throughout the week.
24hr values daily 4am to 4am. Precipitation: Today 24hr water: 1-1.5 snow: 12-18+
Tomorrow’s 24hr water: .25-.5 sn…

6:15 ABS Saturday the 17th

Bring your powder pants.

MOUNTAIN WEATHER FORECAST

Time and Day: 0630 Friday
The Snapshot:A few days of sporty winter weather has begun.Windy conditions with moderate snow today with heavy snow expected tomorrow.Weekend snow totals could exceed 2’(yes feet).Dry and very cold weather will start the new week.
The Science
Current Observations: This morning’s radar is lit up with widespread precipitation heading for the mountains.It is snowing at Stevens Pass with.19” of water and 3” of new snow thus far.The barometer is at 1017mb’s and falling.The temperatures profile is 27base / 22 ridges with the westerly winds starting to crank up.
The Forecast: A strong low-pressure trough with two embedded warm fronts will bring heavy snow, fluctuating freezing levels and wind to Stevens Pass through early Sunday morning.Snow totals by noon Sunday could exceed 3” of water/ +24” of snow.
The Long Range:The snow ends on Sunday.A cold dry arctic air mass flowing in through the Frazer River Gap could produce the coldest temperatures of the year early next …

8:00 Fri Feb 16th ABS

MOUNTAIN WEATHER FORECAST

Time and Day: 0700 Thursday
The Snapshot:Light snow showers with partial clearing can be expected today.Snow increases overnight with moderate to heavy snow falling through the weekend.
Snow totals by the end of the weekend could be in the 2-3’range.
The Science
Current Observations:It is lightly snowing this morning with 3” of snow that fell over the last 24hrs.The temperature profile is 25 base / 21 ridges.The barometer has bumped up to 1022mb’s with the 5000’ winds blowing 5-10 out the west.The radar has a few light scattered snow showers falling in the mountains with the leading edge of the next system off of the southern BC coast.
The Forecast: A weak upper-level ridge will provide a relatively quiet day with some light snow showers and broken clouds throughout.
A warm front, still well offshore, will push the next round of precipitation into the PNW tonight.The Puget Sound Convergence Zone will set up shop tomorrow with strong westerly flow and good orographics developing. Therefore …

8:00 Thur Feb 15th ABS

MOUNTAIN WEATHER FORECAST

Time and Day: 0630 Wednesday
The Snapshot:Snow diminishing today with light snow showers lingering through the day.More new snow is expected for the start of the weekend.
The Science
Current Observations: 5” of 8% snow fell overnight.The temperature profile is 27 base / 23 ridge.The barometer has dropped to 1008 mb’s with the wind blowing 5-15mph from the west.The satellite image has the cold front over the eastern basin with remnant snow showers falling in the mountains.
The Forecast: With the cold front now to the east, a cool showery pattern has filled in.Cool and relatively dry northerly flow will slowly diminish the snow showers over the next 4 or so hours as well as bring evening cold temperatures.
The next storm of interest enters the region late tomorrow night or early Friday morning.This will have similar effects as last night’s storm with 4-6” of snow on the ground by Saturday morning.
The Long Range: A low-pressure system will drop in from the NW on Saturday with yet more snow f…

Mid-day MOUNTAIN WEATHER FORECAST

Mid-Day Weather Update
Time:  2:30pm
Changes to morning forecast: No significant changes to this morning's forecast.  4-6” of snow by opening tomorrow with snow tapering off through the day.   
If anything, the precipitation may arrive later (after 7pm) than earlier forecasted.  Tomorrow snowfall amounts may be slightly less as well. 

 From this morning: 
The Snapshot:  Clear this morning with an amazing sunrise.  High clouds, warm air, and precipitation will move in later today.  Snow arrives this evening with a possible powder day shaping up for tomorrow.  Thursday will be mostly dry with more snow on Friday and then again on Saturday.
Note: Depending on the timing of this storm, a short period of freezing rain may be possible this evening on the east slope roads. 
The Science
Current Observations: The temperature profile is inverted with the base area temperature at 22f and the Tye Mill telemetry site reading 29f.  The barometer is 1022mb and holding steady at the moment.  The 5000’…

8:00 Wed Feb 14th ABS

MOUNTAIN WEATHER FORECAST

Time and Day: 0700 Tuesday
The Snapshot:  Clear this morning with an amazing sunrise.  High clouds, warm air, and precipitation will move in later today.  Snow arrives this evening with a possible powder day shaping up for tomorrow.  Thursday will be mostly dry with more snow on Friday and then again on Saturday.
Note: Depending on the timing of this storm, a short period of freezing rain may be possible this evening on the east slope roads. 
The Science
Current Observations: The temperature profile is inverted with the base area temperature at 22f and the Tye Mill telemetry site reading 29f.  The barometer is 1022mb and holding steady at the moment.  The 5000’ winds shifted SW yesterday evening and have eroded the east flow at the surface.   Satellite images show the leading edge of the approaching frontal system just off the BC coast and tracking SW.
The Forecast:  The warm air aloft is in response to the approaching storm tracking in from the NW.  This is a triple front storm which, a…

8:00 Tue Feb 13th no ABS

MOUNTAIN WEATHER FORECAST

Time and Day: 0730 Monday
The Snapshot:  This dry, chilly weather will continue today with clouds and light snow expected late tomorrow night.  A return to winter is beginning to take shape with snow expected for the weekend. 
The Science
Current Observations:  Burr! – 15 degrees this morning with clear skies over Stevens Pass.   The barometer is at 1016mb and climbing, the winds are light and out of the NE.  The radar has clear skies over most of the State. 
The Forecast:  The high pressure cell responsible for this beautiful weather will begin to flatten and shift south over the next 24 hrs.  This will allow unstable NW flow to develop with some light snow heading in early Wednesday morning.   
The Long Range:  The northern jet stream is beginning to show signs of a nice NW flow pattern developing.  With some luck, this will bring several storms into the PNW starting Friday with more following for the weekend.  
24hr values daily 4am to 4am.
Precipitation: Today 24hr water:0   snow: 0
Tom…