November 27, 2020

New Podcast: Why is November the Stormiest Period of the Year and the Forecast for Next Week

Believe it or Not!

On average, we are now past the worst weather of the winter!  Shocking but true.  And in the second segment of my podcast, I tell you why.

Take a look at the daily probability of experiencing .25 inches or more  in Seattle (below).  Mid to late November is the time of the year when you have best chance to "enjoy" such a wet day and the probabilities actually drop in December and January.


What about a plot of daily extreme rainfall in Seattle?   November has the most with December being relatively more benign (below).


There is a reason for this situation and it has to do with the strength and position of the jet stream.  Check my podcast to find  out.

And the podcast also includes the forecast for this week, which will include unusually dry, sunny conditions and powerful easterly flow on the western side of the Cascades.

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3 comments:

  1. BAMCISNovember 27, 2020 at 9:16 PM

    Believe, that's for sure. Between the rain shadow and now what seems to be the start of a weeks long Triple R, it seems the weather is going to be solidly locked on "boring" mode. Most people prefer boring anyway, so its OK.

    ReplyDelete
  2. Storm1November 29, 2020 at 12:47 PM

    I flew in from Sacramento this morning and it was amazing how thin the fog was in many cases tree tops and tops of tall buildings were poking out of it. There was a patchy od denser fog near sea tac and i was amazed the plane could land the plane didnt enter the fog until about 20 seconds before landing.

    ReplyDelete
  3. ImranNovember 29, 2020 at 10:53 PM

    I have a question. Please reply back in blog or podcast. The question is: in our region ( northwest) we do get ridges of high pressure either in summer or winter. When this ridge start amplifying, the low lever flow turns easterly. I think the low level flow first turns northeast and then east.
    I want to know that what causes the low level flow to turn easterly, when 500MB ridge moves to our region and amplifies ?

    ReplyDelete

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