Time and Day: 0830 Tuesday
The Snapshot:
Today and most of tomorrow will be dry with
the clouds trying burn off. Snow arrives
tomorrow night.
The Science
Current Observations: It is overcast
this morning with Pass level temperatures in the lower 20’s and 16 degrees at
Tye Mill. The barometer is 1022mb and
steady. The RH is 89% with light easterly breezes.
The Cascade Crest cloud
deck is sitting at 4500’ and will try
and burn off again today. Warm air convection
will begin to raise temperatures along the western slopes and slowly scourer
out the cold air settled in the eastern basin. East/west gradients will continue the fight to
keep the east winds and thus, the cooler air, flowing through the Pass through at
least Thursday night.
A low-pressure system with an embedded
warm front will slowly make its way toward the PNW tomorrow. The first band of moisture is timing out to
enter the mountains tomorrow afternoon or early evening. Freezing levels, with the aid of east flow,
should be low enough to allow the moisture to be in the form of snow through
most of Thursday, and possibly even Friday.
Snow totals from 4 pm tomorrow through 4 pm on Thursday will be somewhere in the neighborhood of 3-6”. Freezing
levels begin to inch up near or above 4000’ Thursday night. Another band of
moisture gets pushed in on Friday morning for a chance of more snow.
The Long Range: The low-pressure
system is expected to stall just offshore
which will continue to spin light bands of moisture into the mountains through
the weekend. There is not a ton of moisture associated with this system so precipitation totals through the weekend will
be light.
The long-range weather
pattern continues to be active and wet but with the usual inconsistent details.
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24hr Precipitation ending at 4 am:
Today 24hr water: lt.10 snow: flurries
Tomorrow’s 24hr water: .25 snow:2-4
Trend and Timing:
Mostly dry
today. Light snow begins to
fall tomorrow afternoon.
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24hr temperature
ending at 4 am:
Low: 20 High:
26
Freezing level: 2000’- 3500’
Trend and Timing:
Freezing levels will remain low
through the night and begin to rise after sunrise tomorrow.
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24hr Winds (mph) ending at 4 am:
Base: 5-10 E
Ridge Top: 5-10 ESE
Trend and Timing:
East flow will strengthen and continue
through most of tomorrow.
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jM
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