Stevens Pass Mountain Weather
Forecast
Friday, January 31, 2020. 0730a
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Current Observations:
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24hr Precipitation: .98” swe, 1” snow
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Temperature profile: 38 base. 36 ridge
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Pass level winds: moderate,
WSW, ridge top gusts +20
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Barometer: 1016mb’s and holding
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Sky: overcast and
raining
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Radar: Heavy rain throughout
western Washington with the eastern basin fairly dry.
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The Forecast: Windy and rainy today
with temperatures peaking near 40f. Rain
switches to snow after 4am tomorrow with good snow accumulation expected during
the day.
The Science: The anticipated rain event is in full swing
with freezing levels well above 5000’.
The moist, warm SW flow will continue today with cooler temperatures
arriving tomorrow morning. Winds will be
a player today with models showing 5000’ winds +40 knots this afternoon and tonight.
Tomorrow’s game will begin with a strong cold
front swinging in to save the day. Cold
NW flow aloft will fill in behind the front with freezing levels falling to
4000’ by noon or so. Potential convergence zone with good
orographics will produce some measurable snow. With some luck, we could see a foot of snow on
the ground heading into Sunday.
Long Range. Remnant snow showers will linger into Sunday with
low freezing levels. Sunday and Monday
could shape up to be a great powder days.
More storms on the way for
Tuesday and beyond.
Confidence: Good.
Values from
4am today through 4am tomorrow.
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Precipitation:
Today
24hr
water: 1-1.25
snow: 0
Tomorrow’s
24hr
water: 1-1.25
snow: 10-14
Trend and
Timing:
Rain switches to snow on the upper mountain after 4am tomorrow morning.
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Temperature:
Low: 36 High: 42
Freezing
level: 7000’ – 5000’
Trend and
Timing:
Temperatures will remain well above freezing through the night. Freezing levels fall to 5000’ after 4am,
then reaching 4000’ by 10am or so.
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Winds
Base: 5-15
W gusty
Ridge
Top: 10-20 WSW gust +40 possible
Trend and
Timing:
Winds will be moderate to high throughout the day.
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