Time and Day: 0700 Saturday
The Snapshot: Rain turning to snow today, sunny and
dry Sunday and Monday.
The Science: 7” of snow yesterday evening before it
turned to rain around midnight last night. Light rain will continue this
morning until a cold front sweeps across Northern Washington midday. With the
frontal passage temperatures will drop, westerly winds will increase, and there
will be moderate snow for Stevens Pass in convergence showers.
Snow will taper off overnight, ending by Sunday
morning. High pressure builds in behind the trough, bringing dry weather and
clearing skies on Sunday. Temperatures will begin to rise again Sunday, with
freezing levels reaching 5,000 Monday with mostly sunny skies. Spring arrives a
bit early.
The Long Range: After a couple sunny days, low
pressure develops in the Pacific and approaches Oregon on Tuesday. This will
direct warm southerly flow and moisture across the PNW. Snow levels look to
start above Pass level Tuesday morning, but lower by Wednesday. Stay tuned.
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24hr Precipitation ending at 4am:
Today 24hr water = .5-.75 snow =
6-8”
Tomorrow’s 24hr water = >.10 snow
= 0-2”
Trend and Timing:
Moderate rain turning to snow Saturday midday. Possible
heavy snow showers in convergence, ending Saturday night.
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24hr temperature
ending at 4am:
Low: 20 High: 36
Freezing level: 5500’- 1000’
Trend and Timing:
Temperature and snow level should fall dramatically
during the day and overnight Saturday.
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24hr Winds (mph) ending at 4am:
Base: W 10-15
Ridge Top: W 15-25
Trend and Timing:
Winds will increase with the frontal passage and remain
moderate and gusty during the day Saturday, tapering down overnight.
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