Time and Day: 0600 Saturday
The Snapshot: Mr. Winter storm is on track to bring snow to
Stevens Pass for the rest of the weekend.
A high wind advisory will be in effect tonight and tomorrow as well.
The Science: Snow should start falling in the mountains
this morning with the main front hitting the western slopes around noon or so
today. This system is a triple
point storm with a warm front today followed by a cold front tonight.
Once the cold front moves through, strong westerly winds will kick in, and the snow will turn to showers. However, strong
westerly flow will set up the Puget Sound Convergence Zone allowing the snow
showers to be persistent and intense. NW
flow with an unstable cooling atmosphere will keep snow falling through early
Monday morning.
Long
Range: Snow will end on Monday as
high pressure begins to build off the NW coast.
Cold air flowing in from the north will drop temperatures into the teens
early next week. The second half of next
week will see a return to active weather.
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Precipitation
ending at 4 am:
Today’s
24hr Water = +-.75 Snow = 8-10
Tomorrow’s 24hr Water = +-
.75 Snow =
6-8
Trend and Timing:
Snow starts around noon today and will continue
through the night. Convergence
conditions may push snow totals up with the most intensity happening late tonight.
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24hr temperature ending at 4 am tomorrow:
Low: 24 High: 30
Freezing level: +3500’ – 3000’
Trends and Timing:
Freezing levels will remain below Pass level for
this storm cycle. Watch for a quick
spike in temperatures as the warm front approaches this morning. Temperatures will fall in the wake of the
cold front tonight.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 E
shifting W
Ridge Top: 5-10
E Shifting W strengthening
Trend and Timing:
East flow will shift westerly with the passing of
the cold front tonight. Strong
westerly winds can be expected through tonight and tomorrow.
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JM
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