Time and Day: 1130 Sunday
The Snapshot:
Partly cloudy and cool with snow starting again Sunday night. Continued snow
showers Monday.
The Science: A
low pressure trough is centered over Washington currently with bands of moist,
unstable air spinning in out of the Pacific. The trough will move east during
the day Sunday, with westerly flow filling in behind it. Mid and upper level
west flow will support good orographic snow showers Sunday night and Monday
with periods of intense snowfall in convergence showers.
The Long Range: The general setup for the next 7 days looks good for continued snow
events in Washington. West and northwest upper level flow with a cold pool of
air in Canada and plenty of moisture streaming in should make for several
rounds of moderate to heavy snow by next weekend. Currently Tuesday
night/Wednesday and Friday look like some of the bigger events in a series of
storms.
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Precipitation Ending at 4am:
Today 24hr water = .5 Snow = 6-8”
Tomorrow’s 24hr water = .5 Snow = 6-8”
Trend and Timing:
Light snow showers should begin again
Sunday afternoon, becoming moderate to heavy briefly between 1am and 7am
Monday in convergence showers. Day 2 snow amounts will be part of that event.
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24hr temperature
ending at 4 am tomorrow:
Low: 17 High:
29
Freezing level: 1000’
Trend and Timing:
Daytime warming is pushing
temperatures up well above freezing levels midday, but they are dropping
nicely overnight the next two days.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: Variable 0-5
Ridge Top: 5-10 WSW, then 15-25 W
Trend and Timing:
Winds should increase Sunday night and
Monday morning and become more due westerly.
DV
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