Time and Day: 0730
Monday
The Snapshot: 5” of snow fell overnight with snow showers
and cool temperatures continuing today.
More snow with warmer temperatures can be expected throughout the week.
The Science: The PNW weather will remain
very active as an unstable atmosphere, powered by strong westerly flow, keeps
moderate to heavy snow showers moving through the mountains. The warmer
air along the southern portion of the flow pattern (Oregon) will begin to move
north over the next few days; this will allow higher temperatures into the mix
with freezing levels creeping up to near 4000’.
Another wave of precipitation
will track up from the south tomorrow afternoon/evening with heavy snow
expected. There doesn’t appear to be a rain component with these next few systems, but
with rising freezing levels and seasonal daytime warming, the snow will be wet
and heavy at times.
The Long Range: Active winter/early spring weather, with
plenty of snow to play with, will continue through the upcoming weekend.
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Precipitation
Ending at 4am:
Today 24hr water = .5 snow
= 4-7
Tomorrow’s 24hr water
= .75-1 snow = 8-12
Trend and Timing:
Intermittent snow
showers will persist today – note: convergence flow is expected to be north
of Stevens Pass, but a slight shift could push snow totals up a few
inches. A heavier snow event is
expected during operation hours tomorrow.
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24hr temperature ending at 4 am tomorrow:
Low: 17 High:
26
Freezing level: 1000’-
2000’
Trend and Timing:
Freezing levels will
remain low into early tomorrow morning.
Temperatures begin to rise tomorrow afternoon. Expect seasonal daytime warming every day.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 5-10 W
Ridge Top: 5-15 W
gusty
Trend and Timing:
Westerly flow will
persist through the next 24hr.
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jM
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