Time and Day: 0715 Sunday
The Snapshot: Light
snow today, ending tonight. Moderate to briefly heavy snow tomorrow
afternoon/evening.
The Science: 3”
overnight should help conditions a bit. A shortwave low pressure trough should
swing over Washington today bringing light snow showers throughout the day.
Upper level SW flow will be in place behind the trough this afternoon, with
another trough and cold front approaching the area Monday. Snow should begin in
earnest Monday afternoon becoming moderate/heavy Monday evening before tapering
down after midnight.
The Long Range: After the cold front passage Monday night, the PNW should be under a
large, cold trough of air for the middle and end of next week. Embedded west
flow should maintain moderate snow Tuesday and Wednesday. 72 hour snow totals
ending Thursday morning should be around 16”. Thursday and Friday currently look cold and
dry.
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Precipitation Ending at 4am:
Today 24hr water = .25 Snow = 2-4”
Tomorrow’s 24hr water = .75 Snow = 8”
Trend and Timing:
Light snow tapering this morning,
increasing Sunday afternoon, tapering again by 10pm Sunday night. Monday
should start out dry with snow beginning by noon and becoming moderate to
heavy at times through Monday evening. Tapering to light snow through Tuesday
morning.
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24hr temperature
ending at 4 am tomorrow:
Low: 24 High:
30
Freezing level: 3500’-2500’
Trend and Timing:
Temperatures will bounce around a bit
Sunday with daytime warming and as various airmasses move through the area.
Cooling should begin Sunday night with sharp cooling Monday night.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: E, then W, then E 5-10
Ridge Top: SE-SW 10-20
Trend and Timing:
East flow should ease Sunday afternoon as
the trough swings through, then pick up again Monday morning.
DV
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