Time and Day: 0630
Friday
The Snapshot: One more beautiful morning before a slow change
to warmer and wetter weather begins. Stevens
Pass will remain relatively dry, but warmer, through most of the Holiday
weekend. Heavy rain is expected Monday
night through Wednesday morning.
The Science: High clouds and warmer air aloft has begun to
filter in with temperatures on the upper mountain and along the western slopes
in the 20’s. The temperature inversion
will slowly flip as warm southerly flow erodes the cold air trapped in the eatern
basin.
The strong high
pressure system stationed over the Inland NW will continue to block the
incoming moisture through most of the weekend. Therefore
expect Stevens Pass to remain mostly dry into MLK day.
The Long Range: The
main moisture event is now timing out to arrive sometime Monday afternoon. 5-7000’ freezing levels are expected with
heavy precipitation.
NOTE:
A major rain on snow event Monday night into Tuesday is likely. High freezing levels with several pulses of
moisture will be a part of the equation through the middle of next week.
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Precipitation
Ending at 4am:
Today 24hr water = 0 Snow = 0
Tomorrow’s 24hr water
= 0 snow = 0
Trend and Timing:
Dry through at least
Sunday night.
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24hr temperature ending at 4 am tomorrow:
Low: 15 High:
24
Freezing level: 2500’-3500’
Trend and Timing:
Freezing levels will
rise to near 4000’ over the next 24hrs.
East flow will help hold surface temperature near or below freezing.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-10 E
Ridge Top: 5-10 SE
Trend and Timing:
East flow will remain at the surface while 5000’
winds shift southerly.
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jM
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