Time and Day: 0700 Thursday
The Snapshot:
Clear and mostly dry today with snow arriving
tomorrow afternoon. Snow showers are
expected through the weekend.
The Science
Current Observations: 1”
of snow fell overnight with clear conditions being reported this morning. The temperature profile is 100 base
and 40 ridges. The winds are
light and out of the east and the barometer has risen slightly to 1015 mb’s. The satellite radar has, with the exception
of some light snow falling in the Columbia Gorge, dry conditions for most of
the state.
The Forecast: An upper-level
ridge will nudge into the mountains today producing a mostly dry day. The flow shifts NW tomorrow with and embedded
cold front in tow. Snow arrives early
tomorrow afternoon with convergence conditions possibly setting up. Moderate
post front winds can be expected tomorrow night but they should be fairly short-lived.
The Long Range: The snow will diminish Saturday morning with
a short dry period and sun breaks Saturday afternoon. Another system arrives early Sunday morning with
more snow. Temperatures will remain on the cold side through the weekend
with more seasonally average temperatures expected next week.
24hr values daily 4am to 4am.
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Precipitation:
Today 24hr
water: lt.10 snow:
trace
Tomorrow’s 24hr
water:.75 snow: 6-10"
Trend and Timing:
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Temperature:
Low:10 High:
20
Freezing level: Sea level -500’
Trend and Timing:
Cold temperatures will remain in place
today with some gradual warming starting tomorrow.
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Winds
Base: 0-5 E
Ridge Top: 5-10 E
Trend and Timing:
East flow will continue into early
tomorrow morning and then shift westerly with the arrival of tomorrow’s
front. A post front wind event should
be expected late tomorrow afternoon with gust 20-25mph.
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