0730 Saturday:
The Snapshot: Rain today, mixed rain and snow tonight and then again tomorrow.
The Science: This morning’s satellite imagery has widespread
rain, originating from a subtropical plumb spreading throughout the state. A
cold front preparing to enter the scene tonight will cut off the moisture and
drop freezing levels to +- 4500’. Rain
and snow return tomorrow as a low-pressure system tracking up the coast spins
another band of moisture through the Cascade Mountains. East
flow developing will push temperatures just below freezing for some snow early
Monday morning.
Long Range: Next week will start out wet with snow
turning to rain on Monday. High-pressure east of the mountains and weak
weather systems clipping the NW coast will bring a mixed bag off weather for
the next +- 7 days.
Weather of Note: Cat 5 Cyclone Pam hit the South
Pacific (southern hemisphere) yesterday.
Pam is one of the strongest storms on recorded with record breaking
low barometric pressure. (-900 mb with
165mph sustained winds)
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Precipitation ending at 4am:
Today’s 24hr Water = 1 Snow = 1-3
Tomorrow’s 24hr Water = .75 Snow
= 3-5
Trend and Timing:
Rain today
changing to mixed snow late tonight, a dry start to the day tomorrow with
mixed rain and snow developing later in the day. The precipitation will diminish by Monday evening.
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24hr temperature ending at 4am
tomorrow:
Low: 30 High: 46
Freezing level:
7000’ 4500.’
Trends
and Timing:
Freezing
levels will temporarily fall to +-4500’ in the wake of the passing cold front
late tonight. Freezing levels will
fluctuate between 4000’ and 5000’ through Monday morning.
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24hr Winds (mph) ending at 4am
tomorrow:
Base: 0-10 W
Ridge Top: 5-15
W gusty
Trend
and Timing:
Westerly flow
today with gusty ridge top winds. East
flow develops tomorrow.
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JM
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