Time and Day: 0700 Friday
The Snapshot: 4” of new snow fell overnight with snow continuing today.
The snow ends tomorrow with clearing,
more snow on Sunday.
The Science: A strong frontal system will push into the region today bringing moderate to heavy
snow to Stevens Pass tonight. Westerly
flow along with a potential Puget Sound Convergence Zone will also bring windy
conditions and lower freezing levels. A ridge of high pressure passing between systems
will dry up the moisture with some partial clearing tomorrow afternoon. Another front arrives Sunday with more snow.
The Long Range: Snow
showers linger into Monday with the rest of next trending dry and warmer under
building high pressure.
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Precipitation Ending at 4am:
Today 24hr water = .75-1 Snow = 6-10
Tomorrow’s 24hr water = .25 snow = 2-4
Trend and Timing:
Light snow will fall today with an
intense period between 4 pm and 10 pm tonight. Convergence conditions are expected to form with moderate to heavy
snow showers persisting into tomorrow morning. Snow comes to and end by noon or so
tomorrow.
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24hr temperature
ending at 4 am tomorrow:
Low: 30 High:
24
Freezing level: 4000’ -2500’
Trend and Timing:
Freezing levels will fall in the wake
of the front tonight.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-10 E shifting W
Ridge Top: 5-10 ESE shifting W
Trend and Timing:
East flow will shift westerly tonight with
the passing of the front. A high wind
advisory will be in effect late tonight through the early morning hours.
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jM
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