Time and Day: 0630 Saturday
The Snapshot: Happy Boxing day.
Cold and dry today with clouds developing this afternoon; light snow
showers tomorrow, dry and clear on Monday.
The Science: Doppler
radar shows a cold, dry airmass with high cirrus clouds starting to stream over
the North Central Cascade Mountains this morning. A weakening low-pressure trough will swing
over the area tonight producing light snow shower through tomorrow. The clouds and moisture clear out on Monday as
pressure rises over the region.
Long
Range: Strengthening high pressure
will start blocking incoming storms staring on Monday. Cold and dry weather can be anticipated for
most of the final week of the year.
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Precipitation
ending at 4 am:
Today’s
24hr Water = .25 Snow = 1-3
Tomorrow’s 24hr Water =
+.25 Snow
= 2-4
Trend and Timing:
Light snow will begin late tonight and continue
through tomorrow.
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24hr temperature ending at 4 am tomorrow:
Low: 12 High: 18
Freezing level: +-500’
Trends and Timing:
A cold air mass will remain over the mountains for
low temperatures through the weekend.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 E
Ridge Top: 0-10 SE
Trend and Timing:
Surface winds will shift easterly today while
winds aloft remain southerly.
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jM
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