Time and Day: 0800
Sunday
The Snapshot:
Rain this morning changing to snow showers tonight. Light snow can be expected on Monday with heavier
snow on Tuesday.
The Science
Current Observations: 2” of snow was squeezed out of .19” of water last
night. The temperature is currently 32 degrees, the RH is 96%, the barometer
has dropped to 1004mb and the winds are easterly at 5-10mph. The radar has a band of heavy rain falling
in the mountains with a few spots of mixed snow.
The falling barometer is
an indicator of the low-pressure trough
with an embedded cold front tracking
towards the Cascade Mountains. Freezing
levels are expected to drop with the passing of the cold front later today. The passing of the front will also shift the
rain to snow and then diminish the precipitation to intermittent showers
through the night. Cool unstable westerly
flow will keep snow showers persistent tomorrow.
The
Long Range: A good looking frontal system
with cool NW flow will bring moderate to heavy snow on Tuesday. Wednesday looks relatively quiet with more
active weather returning towards the end of the week.
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24hr Precipitation ending at 4am:
Today 24hr water: .5-.75” snow: 2-5”
Tomorrow’s 24hr water: .5 -75” snow:4-6”
Trend and Timing:
Rain is expected for most of the day
with snow entering the mix around 4 pm.
A weak convergence period could enhance snowfall
for a few hours this evening.
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24hr temperature
ending at 4 am:
Low: 28 High: 36
Freezing level: 6500’- 4000’
Trend and Timing:
Surface temperature will
bump up a few degrees this morning and then drop to or below 32 degrees late this afternoon. Freezing levels are expected to drop to or
below 4000’ after 4 pm or so.
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24hr Winds (mph) ending at 4 am:
Base: 0-5 E shifting W
Ridge Top: 5-10 ESE shifting W
Trend and Timing:
Winds will shift westerly and
strengthen with the passing of the front later this afternoon.
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jM
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