Time and Day: 0800 Wednesday
The Snapshot: Light snow showers with sun breaks today, increasing mixed rain and
snow tonight with snow increasing tomorrow. Potential powder day on Friday.
The Science: A
low-pressure system developing in the
Gulf of Alaska will drive a warm front followed by a cold front into the PNW
starting tonight. Freezing levels will
spike up (+-5000’) in the wake of the warm front tonight but, cool westerly flow will fill in behind the cold
front tomorrow. Therefore, expected mixed rain and snow
tonight with snow intensifying tomorrow.
The Puget Sound Convergence Zone is expected to develop which will bring
periods of heavy snow and wind to Stevens
Pass tomorrow.
At the moment, storm
totals by Friday noon exceed 1.5” of water and or 10-15” of snow; those values will
be refined later today.
The Long Range: Saturday will be mostly dry with
sun breaks with more snow on Sunday.
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Precipitation Ending at 4am:
Today 24hr water = .5 Snow = 2-4
Tomorrow’s 24hr water = 1 snow = 8-10
Trend and Timing:
Lights rain and snow showers today,
snow tomorrow.
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24hr temperature
ending at 4 am tomorrow:
Low: 28 High:
36
Freezing level: 5000’ – 3500.'
Trend and Timing:
Freezing levels will spike to near 5000’
tonight and then fall early tomorrow morning.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 W gusty
Ridge Top: 5-15 W gusty
Trend and Timing:
Winds will be light today. Westerly flow increases tonight with high
ridge top winds expected. Convergence
flow will bring a windy day tomorrow.
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jM
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