O700 Saturday:
The Snapshot: Snow and wind today, dry with sun breaks tomorrow, snow on Monday.
The Science: The cold front passed over the Cascade crest
around midnight last night dropping .31” of water with only an inch of snow so
far this morning; no surprise with the warm airmass that had to push out of the
way. Heavy snow showers, cold air and
strong westerly flow will fill in behind the front today. It is now up to the convergence zone whether
Stevens Pass will get the goods or not. Models
have the convergence zone most effective just north of Stevens Pass and then
sagging south this afternoon/evening. It
will be a nail biter.
The snow ends tomorrow
morning as an upper-level ridge between storms moves through. Another cold front arrives Monday with the
chance of additional 2-4” of snow.
Long Range: High pressure returns with
seasonably normal temperatures on Wednesday/Thursday.
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Precipitation ending at 4am:
Today’s 24hr Water = .75-1 Snow = 8-14”
Tomorrow’s 24hr Water =>>.25
Snow = 1-3
Trend and Timing:
Snow will be
rather light this morning with heavy snow showers this afternoon and
evening. Snow tapers off early
tomorrow morning.
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24hr temperature ending at 4am
tomorrow:
Low: 22 High: 32
Freezing level:
+-3000’.
Trends
and Timing:
Freezing
levels will drop to around 3000’ this morning. Some daytime warming will bring surface
temperature to near freezing today.
Sun breaks tomorrow will produce temps into the mid to upper 30’s.
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24hr Winds (mph) ending at 4am
tomorrow:
Base: 5-10 W
Ridge Top: 5-20 W
Trend
and Timing:
Steady
westerly winds will continue through the day. Winds diminish tomorrow and shift
southerly.
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JM
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