Knowing About Rainshadows to Find Sunshine on These Dark Days

Knowing About Rainshadows to Find Sunshine on These Dark Days

 The Seattle Times had a entrance web page article at this time saying half of Seattle’s residents are depressed and by a small margin we’re probably the most depressed main metropolis within the U.S.!

Well, there are numerous causes recommended for this melancholy, together with the dismal state of our municipal management, however the article mentions an outdated favourite:  the dearth of solar this time of the 12 months.
Fortunately, that is one downside that meteorological data may help with.  
A secret that the majority meteorologists know:  that on most days even in our sodden space, there are areas of solar within the sea of clouds.  The areas of rainshadows.   And, if you’ll be able to drive a bit, you’ll be able to usually put your self beneath the depression-killing rays of the winter solar.
I’ve talked about rainshadows a number of instances within the weblog, however let me present a short evaluate.   When air approaches a terrain barrier (such because the Olympic Mountains or Cascade vary), it’s pressured to rise on one aspect (the windward aspect) and to sink on the downstream (leeward) aspect.  When air rises, it cools and might type clouds, however sinking air  on the lee aspect warms and drys, usually offering sunny skies in  the rainshadow.
Knowing About Rainshadows to Find Sunshine on These Dark Days
One sees this impact practically day by day in our area, with clearing skies downstream of the Olympics and Cascades.  But the wind course and pace varies daily, as does moisture and different variables, and thus the situation and extent of rain shadows can change.
Take at this time.  Where have been the sunny spots round midday (on this case, 12:20 PM PST)?  
The seen satellite tv for pc picture for that point (see beneath) tells you precisely the place to go:  to the southeast of Vancouver island and the Olympic Mountains, in addition to downstream of central and southern Cascades.  This makes lots of sense as a result of the final winds have been from the northwest at this time, so these areas are those with sinking air.   The windward sides of the mountains have been in clouds and miserable. 1608262063 640 Knowing About Rainshadows to Find Sunshine on These Dark Days
Can we all know the place the rain shadow might be forward of time?  You wager.  Our excessive decision forecast fashions present cloud forecasts.  For instance, right here is the forecast for midday from a mannequin run that began at four PM the day prior to this (see beneath).  Not excellent, however the rainshadows famous above have been comparatively effectively predicted.
Knowing About Rainshadows to Find Sunshine on These Dark Days
To present you that this example is not any fluke,   Here is the seen satellite tv for pc picture for Monday afternoon…..some good rainshadows downstream of terrain.  Cloudy over north Seattle (there was a convergence zone occurring), however solar to the north and south.
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So, if you wish to go solar/rainshadow chasing,what do you do?
First, go to my division web site and take a look at the seen satellite tv for pc animation (click on right here).And in case you are adventuresome, you’ll be able to even take a look at our mannequin forecasts of the clouds (click on right here).
Perhaps with extra native residents utilizing meteorology to search out the sunshine, we may give up first place in big-city melancholy.   And changing a number of on the Seattle City Council would possibly assist as effectively.____________________________________________
I’ll do a podcast tomorrow on the forecast for this weekend and the vacation season.  Plus, a particular shock subject for a extra in-depth examination.  On Saturday at 10 AM, I might be doing a particular zoom session with my Patrion supporters.  Will discuss in regards to the BLOB and the results on native climate, plus reply questions.

Read More:  Heat Wave over the Northwest, Cold Wave over the Northeast


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