Time and Day: 0730 Wednesday
The Snapshot: Snow today, powder day tomorrow, warming with rain-snow mix on Friday/Saturday.
The Science: This morning’s radar has the approaching frontal system
just about to hit the coastline. The leading edge of the front should reach
the mountains later today with moderate to heavy snow tonight and
tomorrow. This storm is well-organized
with all the fixing of a good snow event. (east flow, PS Convergence…) However, it does begin to warm tomorrow afternoon
with freezing levels inching toward 4500’.
The Long Range: Snow ends Thursday night with a strong warm front and rising freezing
levels entering the scene Friday afternoon.
So expect a mixed bag of snow and rain on Friday night and
Saturday. A very strong high-pressure ridge begins to build on
Sunday/Monday with clearing and freezing levels possibly rising above 10,000’. Dare I say, spring-like?
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Precipitation Ending at 4am:
Today 24hr water = .75 – 1 Snow =
10-14
Tomorrow’s 24hr water = .75 snow = 4-8
Trend and Timing:
Snow begins this morning and
intensifies through the day. Winds
shift westerly around midnight with convergence conditions setting up for
Stevens Pass. Snow, with the possibility of some mixed rain, starts to
diminish tomorrow afternoon/evening.
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24hr temperature
ending at 4 am tomorrow:
Low: 20 High:
28
Freezing level: 1500’ - 3500’
Trend and Timing:
Temperatures will be on the rise with
this system, but it should be
slow. East flow influence will keep
surface temperatures low until late tonight.
Freezing levels expected to rise above
4000’ after 12 pm tomorrow.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 E shifting W
Ridge Top: 5-10 E shifting W
strengthening
Trend and Timing:
East flow
should hold until midnight or so and then shifting westerly. Westerly flow will increase early tomorrow
morning and remain gusty for most of the day.
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jM
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