The
Snapshot: Light snow
and rain today. Heavy rain and high
winds tomorrow changing to snow tomorrow night.
The
Science: The northern
jet stream is taking direct aim at the PNW today while entraining a warm wet
tropical air mass. The warm air mass
will meet the Polar jet late tomorrow night which will equate to moderate to
heavy snow in the mountains on Monday. But first, we will have to endure a
ton of rain and high winds tomorrow.
Storm totals.
Water content by noon tomorrow could exceed 3” of water (mostly rain). 6-10” of snow 4am Monday. An additional +-12”
by 4am Tuesday. Timing of cold air aloft
and favorable orographics (convergence) could push these totals up.
4-7day
Long Range: Skies will clear on Tuesday with extremely cold
temperature being ushered in from the north.
The remainder of the week looks cold and clear.
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Precipitation:
Water
by 4am = 1” Snow equivalent = 0
Total
inches of water by noon tomorrow = 1.75 -2” +
Total
inches of snow by noon tomorrow = 0 at base 2-6 on ridge
Trend and Timing:
Light showers today with precipitation
intensifying tonight. Heavy rain is
expected below Hogsback. The upper ridge will have its share of rain but with
a mixture of snow. The snow line hits
the highway late tomorrow night.
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Base Temp and Freezing levels:
Low: 32 High: 42
Trend and Timing:
Freezing levels will rise just above
5000’ today. Temperatures will begin
fall midday tomorrow with freezing levels fall below 4000’ sometime tomorrow
night.
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Wind:
Base: 10-20 SWS
Ridge Top: 15-30 W
Trend and Timing:
High wind advisory will be in effect for early tomorrow
morning with gust above 50mph possible along the upper ridges. Sustained winds above 25mph will be likely through
most of the day tomorrow.
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