Time and Day: 1200
Wednesday
The Snapshot: The sky is beginning to clear over Stevens
Pass. Light snow can be anticipated to
arrive early tomorrow morning and with moderate snow tomorrow night and into
Friday.
The Science: Clouds have begun to break up as a weak high pressure ridge slides over the mountains. Radar
is still picking up some moisture to the north, but for the most part, the snow
has ended for the day.
A weak warm front
will sag south tonight pushing freezing levels up to +-4000’ tomorrow. There is not a lot of available moisture with
this first front, so expect light snow with temperatures near or just above
freezing for most of tomorrow. Cool unstable NW flow drives in the main batch
of moisture tomorrow afternoon/evening with freezing levels dropping to around
2500’ early Friday morning.
The Long Range: Light snow can be expected on Saturday as a
weak disturbance slides down the coast.
It appears that our recent storm cycle that has dumped all this glorious
snow will come to and end for the start of the New Year. Long term models have a dry, cold and stable
airmass (high pressure) parking itself over the NW coastal region starting
January 1st 2017.
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Precipitation
Ending at 4am:
Today 24hr water = <.25
Snow = 1-2
Tomorrow’s 24hr water
= .5-.75 snow = 6-8
Trend and Timing:
Light snow develops
early tomorrow morning with light snow showers through the day. Heavier snow arrives after 2 pm tomorrow.
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24hr temperature ending at 4 am tomorrow:
Low: 20 High:
28
Freezing level: 3000’-4000’
Trend and Timing:
Surface temps will
drop under clear conditions tonight.
Freezing levels will rise to
4000’ or so tomorrow.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 E
Ridge Top: 5-10 ESE
Trend and Timing:
Light east flow develops tonight. Wind shift
westerly with the passing of the front tomorrow afternoon.
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jM
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