Snow Update
Most of you will see some snowflakes on Sunday, but for those living near sea level, few will experience accumulating snow.
The problem? The air in British Columbia is too warm and temperatures near sea level will remain marginal for snow to reach the surface.
This is the great frustration of Northwest weather forecasters in winter: marginal temperatures for the white stuff near sea level.
Looking now in southern British Columbia, one is underwhelmed by the tepid temperatures (see below), Temperatures in the 30sF and 20s. No strong push of cold, northerly flow.
The forecast temperatures don't produce any cold thrills. The predicted temperatures around 5000 ft (850 hPa pressures) for Sunday at 10 AM are shown below (red dashes), with difference from normal shown by shading. Dark blue is much colder than normal. No sign of primo cold air in British Columbia.
And we need cold British Columbia air to displace the mild, marine air that normally floods our region...assuming you want lowland snow.The 24-h snowfall ending 4 PM Sunday is shown below. Lots of snow on the lower slopes of the Cascades...which is good thing since the lower slopes are pretty bare. And notice more snow (few inches) around Portland, where the warmer marine influence is less and there is some cold air moving westward in the Columbia Gorge.
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