Time and Day: 0830
Thursday
The Snapshot:
Windy with rain changing to snow today,
snow showers can be expected tomorrow with the weekend starting out dry.
The Science
Current Observations:
1.69” of rain fell over the last 24hrs, the temperature is 43f. The
Rh=97% and the barometer is at 1009mb and falling, the winds are out of
the SW at 10-15m ph.
An approaching cold front
will push another band of heavy precipitation into the Cascade Mountains today. Once the front passes east of the crest, the
temperature will fall and the heavy precipitation will begin to diminish.
Strong westerly flow will also fill in behind the front for a period of
convergence zone activity. If the timing of the convergence zone and the cool air
works out well, there could be up to 6” of fresh snow on the ground for
tomorrow.
The Long Range: Saturday will start out mostly dry with another
strong southerly push of moisture moving up through the region late Saturday
night. This system appears to have snow
changing to rain and then back to snow component – stay tuned as those details
become more apparent. The long-range
models have a drying trend beginning on Tuesday or Wednesday of next week.
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24hr Precipitation ending at 4am:
Today 24hr water: 1 snow: 4-6
Tomorrow’s 24hr water: .25 snow: 2-4
Trend and Timing:
Heavy rain today will slowly shift to
snow showers tonight. Light
intermittent snow showers are expected through the day tomorrow.
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24hr temperature
ending at 4 am:
Low: 32 High: 46
Freezing level: 7500’ – 4000’
Trend and Timing:
Freezing levels will fall today
dropping to 5000’ by +- 2 pm and then
4000’ sometime after 7 pm.
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24hr Winds (mph) ending at 4 am:
Base: 5-10 W
Ridge Top: 10-20 W gusty 30+
Trend and Timing:
Winds will strengthen today with strong
westerly ridge top winds likely.
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jM
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