Time and Day: 1000
Monday
The Snapshot: Just another powder day. The snow will come to an end tomorrow morning with a dry interim period before
the next storm hits Wednesday night.
The Science: Persistent snow showers, low temperatures,
and westerly flow have filled in behind the cold front that moved through early
this morning. The Puget Sound Convergence zone will keep
snow showers pumping into the Cascades through the night. There is a slight WNW
orientation to the convergence zone so most of the heavy snow may be north of
Stevens Pass – or not.
A weak upper ridge
between storms will bring a short period of mostly dry weather tomorrow and
most of Wednesday. Cold air aloft and
the re-establishment of east flow will keep freezing levels in the 1-2000’ range
through early Thursday morning.
The Long Range: Prepare for more moderate to heavy
precipitation (snow/rain) with freezing levels currently showing +5000’ on
Thursday.
Long-long range
models have strong high pressure building
off the PNW coast over the weekend. So
at this point, expect mostly dry and clear weather leading into the Presidents
Day weekend.
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Precipitation
Ending at 4am:
Today 24hr water =
.5-.75 Snow = 6-10
Tomorrow’s 24hr water
= .25 snow = 1-3
Trend and Timing:
Snow showers, heavy at
times, will persist through the night.
Snow tapers off after 4 am
tomorrow with light snow showers persisting until noon or so.
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24hr temperature ending at 4 am tomorrow:
Low: 12 High:
22
Freezing level: +-1500’
Trend and Timing:
Temperatures will
remain on the cool side for the 24-48 hrs.
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24hr Winds (mph) 0ending at 4 am tomorrow:
Base: 5-10 W
Ridge Top: 5-15 W
Trend and Timing:
Watch for gusty ridge top westerly winds
today. The wind diminishes and shifts easterly tomorrow.
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jM
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