Time and Day: 0630 Wednesday
The Snapshot: Windy with light snow today and
tomorrow. Warming and rain expected on
Friday with a mixed bag of weather for the weekend.
The Science
Current Observations: The convergence zone shifted north last night which is
why only received 3” of snow. There is
partial clearing being reported with the temperature profile at 26 base / 21 ridges. The 5000’ winds were westerly and have been
fairly consistent through the night; 5-15 mph.
The barometer is 10016mb’s and slowly trending up.
The Forecast: The rising
barometer is an indicator of the pressure gradients easing off a bit today,
hence the partial clearing. Unstable
cool westerly flow will keep light snow showers falling in the mountains
through tomorrow.
A warm front with moisture
will slowly lift north over the next 36-48hrs. Freezing levels are expected to
reach 4000’ tomorrow afternoon and then bump up to 5500’ early Friday
morning. The precipitation will continue
as snow through tomorrow and then change to rain early Friday morning.
The Long Range: A large high pressure system, developing off
of the California coastal waters, is expected to slowly drift north over the
next 5-7 days. The center of this system
is expected to remain offshore and south
of Washington State. This will allow storms with rising and falling freezing
levels to continue to move through the region.
What all this means is to expect periods of rain and snow with mild
temperatures through the weekend and likely beyond.
24hr values daily 4am to 4am.
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Precipitation:
Today 24hr
water:.25-.5 snow: 3-5
Tomorrow’s 24hr
water:.25-.5 snow:1-3
Trend and Timing:
Light snow will persist through
tomorrow.
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Temperature:
Low: 26 High:30
Freezing level: 2500 -3500’
Trend and Timing:
Freezing levels will slowly rise over
the next 24hrs but remain below Pass level until tomorrow night.
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Winds
Base: 0-10 W
Ridge Top: 5-10 W
Trend and Timing:
The flow will remain westerly with the
winds diminishing today.
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