Time and Day: 0630
Sunday
The Snapshot: Just
another late March powder day. Windy
with moderate to heavy snow showers today.
Snow ends tomorrow with dry and clear weather developing. Enjoy the snow while it lasts.
The Science: A cold front passed east of the crest around 2 am this morning with the good westerly flow just now starting to
strengthen. The Puget Sound Convergence
Zone is expected to set up this morning keeping the snow showers moving through
Stevens Pass for most of the day. Ridge
top winds will also strengthen but shouldn’t be a show-stopper. The
precipitation will taper off tomorrow as high pressure begins to build.
The Long Range: The PNW will begin to dry (melt)
out next week. Daytime temperatures could reach
into the 50’s with abundant sunshine by the middle of the week. Seattle temperatures could touch 70 by the end
of the week.
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Precipitation Ending at 4am:
Today 24hr water = .75 -1 Snow =
8-10
Tomorrow’s 24hr water = .25 snow = 2-4
Trend and Timing:
The convergence zone will point
towards Stevens this morning and then shift south toward Snoqualmie later
today. Showers persist through the
night.
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24hr temperature
ending at 4 am tomorrow:
Low: 28 High:
32
Freezing level: +- 3500’
Trend and Timing:
Freezing levels will fall to around
3000’ through the day. A warmer air mass
begins to invade tomorrow.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 5-10 W gusty
Ridge Top: 10-15 W gust
Trend and Timing:
Westerly flow will persist this
morning and then begin to diminish this evening.
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jM
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