Time and Day: 0700 Friday
The Snapshot: Mostly dry with patchy clouds today, rain with
a few snow flakes mixed in late tonight and then again on Sunday.
The Science: High pressure over the PNW interior has produced a
beautiful morning for Stevens Pass. High
pressure to the southeast and low pressure out west will force a few things to
happen; first, it will confine the moisture to the coastal region, and second
it will allow warm air to invade from the south. Thus, expect the next 12hrs to be mostly dry
with rising freezing levels. A weak cold
front will push in late tonight lowering freezing levels to +-5000’ with mixed
rain and snow on the upper ridge and mostly rain in the base area.
The Long Range: Intermittent
snow showers and clear periods along with cooler temperatures will start out
the new week. The snow vs. rain game will be played again Tuesday and Wednesday.
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Precipitation Ending at 4am:
Today 24hr water = .25 Snow = 0-2
Tomorrow’s 24hr water = .5+ snow = 1-3
Trend and Timing:
Light rain begins
after midnight tonight and will diminish to light showers by daybreak. Another wave of moisture enters tomorrow
night with another round of mixed rain and snow.
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24hr temperature
ending at 4 am tomorrow:
Low: 32 High:
40
Freezing level: 4000’ – 7000.'
Trend and Timing:
Temperatures will quickly climb into
the 40’s today. Early morning low
temperatures will struggle to drop below freezing.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 ESE
Ridge Top: 5-10 SSE – shifting SW
Trend and Timing:
East flow at the surface with ridge
top winds shifting southwesterly
tonight.
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jM
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