Stevens Pass Mountain Weather
Forecast
Wednesday, 2/13/2020, 0900
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Current Observations:
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24hr Precipitation: 0
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Temperature profile: 25 base, 29 base
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Pass level winds: moderate ridgetop winds out of the west
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Barometer: 1101mb’s and falling
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Sky: increasing clouds
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Radar: Leading edge of the
incoming moisture moving into Puget
Sound
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The Forecast: Snow arrives this
afternoon and will continue through the weekend. Temperatures will be very much in favor of
snow.
The Science: A band of moisture, out ahead of
a cold front, will enter the mountains today.
Cool unstable WNW flow with potential convergence zone development will fill
in behind the front. The precipitation
will shift to intermittent showers tomorrow with the next frontal band of
moisture arriving on Saturday.
Long Range. Next week with trend dry under building high
pressure.
Confidence: Fair: There is uncertainty on snow
amounts due to the convergence factor.
Values from
4am today through 4am tomorrow.
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Precipitation:
Today
24hr
water:
.5-.75 snow: 6-8
Tomorrow’s
24hr
water: .5-.75
snow: 6-8
Trend and
Timing:
Snow arrives this afternoon and shifts to intermittent showers
tomorrow.
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Temperature:
Low: 24 High:
30
Freezing
level: 3000’– 2500’
Trend and
Timing:
Freezing levels will fall tonight to +-2500’ and stabilize.
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Winds
Base: 5-10 W
Ridge
Top: 10-20 W
Trend and
Timing:
Wind will be persistent through the night with +20mph ridge top winds
likely.
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