Time and Day:
0630 Friday
The Snapshot: Cloudy this morning with some light snow showers
and sun breaks expected for the day.
The Science: A low-pressure system tracking up the Sierra/Cascade
Mountains chain will spin bands of moisture through the PNW for the next few
days. Weak upper-level ridging will also add some clear periods to the mix. There
is cooler air in the upper atmosphere making its way in; this will help what
precipitation there is to be in the form of snow. Another low-pressure
system is expected on Sunday for some snow heading into the new week.
The Long Range: Next week will start out with some fresh snow
and cooler temperatures.
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Precipitation
Ending at 4am:
Today 24hr water = .10
Snow = trace
Tomorrow’s 24hr water
= .25 snow = 2-4
Trend and Timing:
Light snow showers
today and tomorrow.
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24hr temperature ending at 4 am tomorrow:
Low: 26 High: 34
Freezing level: 3500’-4000’
Trend and Timing:
East flow at the
surface will keep low temperatures in or just below freezing. Some typical daytime warming could push
temps up a few degrees this afternoon.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 E
Ridge Top: 5-10
Trend and Timing:
East flow will be the
main wind regime through the weekend.
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jM
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