Time and Day: 0800 Sunday
The Snapshot: Expect one more beautiful day before things
begin to change tomorrow. Snow?
The Science: High cirrus clouds will begin to move over the
PNW tonight as a series of storms begins to make their approach. The first will arrive tomorrow but split apart
as it hits the wall of higher pressure, so not much is expected. A warm front arrives late Tuesday night with more
frontal systems moving through the region for the remainder of the week.
The trick for whether these storms will produce snow or not is east
flow. Tuesday nights front is a warm front
with warmer air and a southwest fetch of moisture. Freezing levels are expected to rise to near
4000’-5000’ along the western slopes.
Initially, the cold air trapped in the
eastern basin will provide east flow temperatures cool enough for snow at
Stevens Pass. Periods of rain and or freezing
rain (east of the mountains) should be anticipated. Storm totals with snow/rain amounts will be
posted later today with better intel.
Long Range: More systems with similar characteristics will
arrive on Thursday and then again on Friday.
A larger warm front is expected
to bring higher freezing levels and potentially rain for the weekend.
Precipitation
ending at 4 am:
Today’s
24hr Water = 0 Snow = 0
Tomorrow’s 24hr Water =
<.10 Snow = trace
Trend and Timing:
Dry today with very light snow tomorrow night.
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24hr temperature ending at 4 am tomorrow:
Low: 24 High:
30
Freezing level: 3000’ -4000.'
Trends and Timing:
The temperature inversion will continue until the
front pushes through tomorrow night.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-10
E
Ridge Top: 5-10 E
Trend and Timing:
East flow will continue through early Tuesday
morning.
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JM
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