Time and Day: 0715
Saturday
The Snapshot:
Light snow showers today, ending Sunday morning. Clearing and cool Sunday.
Current Observations:
4” of low(er) density snow
overnight. Currently partly cloudy with calm winds. RH is 100% at Brooks and
temperatures are in the mid 20’s.
The Science: The final low
pressure system of the week is off the WA/OR coast this morning. It will move
ashore today and cross directly over Washington. It won’t pack much of a punch
for the Central and North Cascades. Stevens Pass should squeeze a few inches of
snow out of it, but significant accumulations are unlikely. High pressure
begins building over the west coast Sunday morning, with skies clearing and
upper level flow becoming dry and northerly. Sunday should be a cooler day.
The Long Range: The ridge of high pressure that begins to
build Sunday will gain strength early next week. By Tuesday freezing levels should
rise, reaching 7,000’ or higher. The ridge looks to remain in place for much of
next week for dry, mild weather.
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24hr Precipitation ending at 4am:
Today 24hr water: .25 Snow: 1-3”
Tomorrow’s 24hr water: .10 Snow: 0-2”
Trend and Timing:
Light scattered snow showers Saturday,
best chance in the afternoon. Snow ending Sunday morning. For a while.
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24hr temperature
ending at 4am:
Low: 22 High: 31
Snow level: 3500-2000’
Trend and Timing:
Temperatures will bump up a bit midday
Saturday, and fall nicely in the afternoon and further overnight, remaining
cooler Sunday.
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24hr Winds (mph) ending at 4am:
Base: Variable 0-10
Ridge Top: W, ESE, then WNW 5-15
Trend and Timing:
Light east flow will develop midday
Saturday as the low pressure center approaches Stevens Pass, then switch back
to WNW overnight and Sunday morning.
DV
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