0700 Saturday:
The Snapshot: Dry
with thickening clouds today, snow tomorrow, mixed rain and snow tomorrow
night, snow on Monday, and rain ending the week.
The Science: A low-pressure
system developing off the western coast will push the high-pressure ridge east
today. This will allow a series of storms
to pass through the region starting tomorrow.
Cool air will flow into the eastern basin today dropping freezing levels
below 4000’. Light snow will begin to
fall late tonight with the main front arriving tomorrow. Warm westerly flow will fill in behind the
front tomorrow evening with mixed rain possible below 4500’. A following cold front will arrive on Monday
with PS Convergence Zone development and cooling – snow. Storm totals below.
Models
do not currently agree with timing or strength, I will post a storm update later today with
fresh data.
Long Range: It all comes to and end on
Tuesday as another ridge of high pressure briefly builds. A strong, moist frontal system with warm SW
flow enters the scene on Thursday with rain ending the week.
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Precipitation
ending at 4am:
Today’s 24hr Water = .10 Snow =
trace
Tomorrow’s 24hr
Water = .5-.75 Snow = 4-8”
Trend and
Timing:
Light snow begins around
midnight tonight but will not intensify until mid-morning tomorrow. Snow changes to mixed rain and snow below
4500’ tomorrow evening. Snow returns
on Monday and continues through Tuesday morning.
48hr Storm totals: 4am Sunday -4am Tuesday = +2” water 8-16”
of snow.
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24hr temperature ending at 4am tomorrow:
Low: 24 High: 34
Freezing level: 5000’ 3500’
Trends and Timing:
Temperatures will fall today
with freezing levels east of the crest dropping below 4000’. Freezing level lift tomorrow afternoon to +-4500’.
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24hr Winds (mph) ending at 4am tomorrow:
Base: 0-5 E
Ridge Top: 0-10 E
Trend and Timing:
East flow will develop today
and continue through tomorrow afternoon. Winds shift westerly in the wake of the
passing front tomorrow afternoon.
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JM
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