Time and Day: 0630
Tuesday
The Snapshot: 2” of snow fell overnight with warmer air and
the next batch of moisture on the way. Heavy snow is expected today shifting to
showers overnight with a similar event is expected on Thursday/Friday.
The Science: The trifecta of heavy precipitation, rising freezing
levels, and gusty winds will grace
Stevens Pass today. A SW to NE oriented jet stream is pushing a
fairly large band of moisture into the PNW.
The leading edge of this system is currently entering the South Sound
with moderate to heavy precipitation falling along the south-western slopes of the
Cascade. A cold front follows tonight
with gusty winds and falling temperatures.
A similar event, packing even more
moisture, is expected on Thursday and Friday.
The Long Range: The active weather continues through the
weekend with several storms poised to impact the PNW. Rain will be part of the discussion as
freezing levels rise and fall with the passing of these storms.
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24hr Precipitation
ending at 4am:
Today 24hr water = 1-1.25
snow = 10-15
Tomorrow’s 24hr water
= .5 snow = 3-5
Trend and Timing:
Heavy snow today. A period of moderate to heavy convergence snowfall can be anticipated early tomorrow
morning with snow diminishing through the day.
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24hr Temperature ending at 4 am tomorrow:
Low: 21 High:
30
Freezing level: 1000’
-3500’
Trend and Timing:
Freezing levels
will rise to around +-3500’ by noon or so today and then fall in the wake of
the cold front at or just after midnight tonight.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 ESE shifting
W
Ridge Top: 5-10 ESE
shifting W
Trend and Timing:
Winds will be south easterly through most of the day. Winds will shift westerly and strengthen tonight
with the approach of the cold front.
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jM
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