Time and Day: 0630
Friday
The Snapshot: Very
light rain last night (no snow accumulation), clearing and
drying trend today through Sunday morning, moderate snow
beginning Sunday and ending Monday morning.
The Science: Last
night's very weak frontal passage is giving way to building high pressure this
morning. Showers will end as the short-lived ridge moves
over Washington state today and exits
the region Sunday. A weak
embedded warm front may brush North-Central Washington Saturday
night without much impact. Right on it's heels will be a more
organized cold front with strong post-frontal west winds which
will affect Stevens Pass Sunday mid-day into Monday morning. This
can be a good setup for convergence showers for
Stevens but currently it looks like the sweet spot will be closer to
Glacier Peak. High pressure briefly rebuilds for Monday with another strong
warm front Monday night.
The Long Range: The
weather remains active for next week with nothing particularly impressive but
continued precipitation at varying snow levels every 24-36 hours.
Precipitation Ending at 4am:
Today 24hr water = .10
Snow = 1-2"
Tomorrow’s 24hr water = .5
Snow = 4-6"
Trend and Timing:
Precipitation will end this morning and pick back
up again Sunday mid-morning. Moderate snow showers will continue Sunday into
Monday morning before ending.
24hr temperature ending at 4 am tomorrow:
Low: 30 High: 36
Freezing level: 4000-4500’
Trend and Timing:
Cooler temperatures this morning will give way to
partly sunny and warmer conditions this afternoon.
24hr Winds (mph) ending at 4 am tomorrow:
Base: 5-10 W, 5-10 E
Ridge Top: 10-20 W, 10-15 E
Trend and Timing:
Moderate west winds will
end this morning, giving way to light and variable winds during the day
Saturday, before shifting to easterly Sunday morning. -253
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