Time and Day: 0700 Sunday
The Snapshot: Light mixed precip today, mostly cloudy
and a brief break tonight. Heavy rain Monday.
The Science: 5” of very dense (~25% water content)
snow at the top of Brooks and mostly rain overnight in the base area will make
for a mix of ski conditions today. Washington State is under what’s referred to
as a “dirty” ridge this morning. This means a weak high pressure ridge that
allows clouds and moisture to move through and around it. This ridge will drift
east today and allow strong SW upper level flow to take over Sunday night and
Monday. Heavy rain will occur Monday along with strong SW winds. There is no real
east flow or cold air in place to insulate Stevens Pass from this event, or the
next few days for that matter. It’s just going to happen.
The Long Range: After a brief break in the
precipitation Monday night, the rain starts up again Tuesday morning. Precip
amounts look a bit lighter on Tuesday, but not by a whole lot. A cold(er) front
crosses the region on Wednesday bringing a slight drop in snow levels. Stay
tuned for optimism regarding the end of next week.
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24hr Precipitation ending at 4am:
Today 24hr water = .25-.5 Snow =
1-3”
Tomorrow’s 24hr water = 1.5-2.0 Snow = 0”
Trend and Timing:
Light snow/rain showers during the day Sunday, and a
brief break in the precip Sunday night. Heavy rain starts after 5am Monday.
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24hr temperature
ending at 4am:
Low: 30 High: 38
Freezing level: 4,000-7,000’
Trend and Timing:
Low temperatures should be Sunday morning. Freezing
levels will climb during the day and overnight, reaching 7,000’ Monday.
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24hr Winds (mph) ending at 4am:
Base: W 5-10
Ridge Top: WSW 15-20
Trend and Timing:
Winds will remain moderate Sunday and Sunday night.
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