It is no surprise that the mountains are receiving
snow. With El Nino not officially developed,
and with most climate predictors forecasting a weak existence at best, a “normal”
start to the snow season is in the works.
So, what is happening out the in the atmospheric
world of the PNW? Seasonal changes in weather patterns are
usually unorganized and fickle. This pattern is no exception. The jet stream has storms stacked and aimed
at the PNW but; there are also huge pockets of warm air associated with the approaching
low-pressure troughs. We can thank what
is left of Hurricane Ana for the warm saturated southern flow heading our way. A few cool weak high pressure ridges will pass
through from time to time (today) but the overall pattern will be dominated by warm
SSW flow.
The Forecast:
Today, Sunday, is one of those passing high-pressure
ridges that will bring a break in the precipitation. Freezing levels will stick around 4000’
through early tomorrow morning with little to no additional snow.
The next approaching low-pressure system will
enter the scene tomorrow evening; this will raise freezing levels above 7000’
and bring heavy rain to the mountains through Tuesday. Another weak high-pressure ridge passes over
on Wednesday for break in the action.
The week ends with a strong southern fetch of
moisture with freezing levels in the neighborhood of +-8000’. A typical late Oct early November weather pattern
for the PNW.
PS: Daily moutain weather forecast will begin Monday Nov 3rd.
JM
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