Stevens Pass Mountain Weather
Forecast
Tuesday, 11/9/2019, 0730
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Current
Observations:
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24hr Precipitation: .76 water, trace of snow
below 4500’
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Temperature profile: 35 base, 33 ridge
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Pass level winds: Light, westerly
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Barometer: 1004mb’s and
rising
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Sky: Overcast
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Radar: A band of mixed rain and snow slowly
progressing NE along the western slopes.
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The Forecast: Mixed rain and snow
this morning with drying and clearing developing tonight. Cooler tomorrow with morning fog and sunshine
later in the day.
Long Range:
The remainder of the week will be dry and clear with warmer temperatures
moving in.
The Science: The cold front that passed east of the crest
early this morning tracked south of Stevens Pass with the occluded front now
lifting north. What this means is that
the freezing levels did not drop as low as anticipated and thus only rain fell
below 4500’. L
A band of moisture associated with the upper
level trough will push NE through the mountains this morning with dry, cooler
northerly flow filling in overnight.
A high pressure system with its SW ridge
stretching out along the west coast will drift into place over the next 24hrs. This will produce clear and cooler conditions
tonight with a warming trend expected to wrap up the week.
The next chance of moisture will be Sunday with
long range models showing a more potent system arriving mid-week or so.
Confidence: short term good, long term poor.
Values from
4am today through 4am tomorrow.
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Precipitation:
Today
24hr
water:
.25 snow: 0 -2
Tomorrow’s
24hr
water: 0 snow: 0
Trend and
Timing:
Mixed rain and snow will diminish through the day with dry conditions expected
tomorrow.
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Temperature:
Low: 26 High: 34
Freezing
level: 5000’ – 3500’
Trend and
Timing:
Freezing levels will fall tonight with early morning surface
temperatures dropping into the upper 20’s.
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Winds
Base: 0-5
W shifting NE
Ridge
Top: 5-10 W shifting NE
Trend and
Timing:
East / offshore flow will develop tonight.
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